Merge pull request #5296 from aws-lumberyard-dev/sc-editor-asset-redux

Sc editor asset redux

Code/Framework/AzCore/AzCore/Script/ScriptContext.cpp

@@ -5073,13 +5073,26 @@ LUA_API const Node* lua_getDummyNode()
                     // Check all constructors if they have use ScriptDataContext and if so choose this one 
                     if (!customConstructorMethod)
                     {
+                        int overrideIndex = -1;
+                        AZ::AttributeReader(nullptr, FindAttribute
+                            ( Script::Attributes::DefaultConstructorOverrideIndex, behaviorClass->m_attributes)).Read<int>(overrideIndex);
+
+                        int methodIndex = 0;
                         for (BehaviorMethod* method : behaviorClass->m_constructors)
                         {
+                            if (methodIndex == overrideIndex)
+                            {
+                                customConstructorMethod = method;
+                                break;
+                            }
+
                             if (method->GetNumArguments() && method->GetArgument(method->GetNumArguments() - 1)->m_typeId == AZ::AzTypeInfo<ScriptDataContext>::Uuid())
                             {
                                 customConstructorMethod = method;
                                 break;
                             }
+
+                            ++methodIndex;
                         }
                     }
 

Code/Framework/AzCore/AzCore/Script/ScriptContextAttributes.h

@@ -21,6 +21,7 @@ namespace AZ
             static constexpr AZ::Crc32 ClassNameOverride = AZ_CRC_CE("ScriptClassNameOverride"); ///< Provide a custom name for script reflection, that doesn't match the behavior Context name
             static constexpr AZ::Crc32 MethodOverride = AZ_CRC_CE("ScriptFunctionOverride"); ///< Use a custom function in the attribute instead of the function  
             static constexpr AZ::Crc32 ConstructorOverride = AZ_CRC_CE("ConstructorOverride"); ///< You can provide a custom constructor to be called when created from Lua script
+            static constexpr AZ::Crc32 DefaultConstructorOverrideIndex = AZ_CRC_CE("DefaultConstructorOverrideIndex"); ///< Use a different class constructor as the default constructor in Lua
             static constexpr AZ::Crc32 EventHandlerCreationFunction = AZ_CRC_CE("EventHandlerCreationFunction"); ///< helps create a handler for any script target so that script functions can be used for AZ::Event signals
             static constexpr AZ::Crc32 GenericConstructorOverride = AZ_CRC_CE("GenericConstructorOverride"); ///< You can provide a custom constructor to be called when creating a script
             static constexpr AZ::Crc32 ReaderWriterOverride = AZ_CRC_CE("ReaderWriterOverride"); ///< paired with \ref ScriptContext::CustomReaderWriter allows you to customize read/write to Lua VM

Code/Framework/AzCore/AzCore/Serialization/EditContextConstants.inl

@@ -133,6 +133,8 @@ namespace AZ
             const static AZ::Crc32 AllowClearAsset = AZ_CRC("AllowClearAsset", 0x24827182);
             // Show the name of the asset that was produced from the source asset
             const static AZ::Crc32 ShowProductAssetFileName = AZ_CRC("ShowProductAssetFileName");
+            //! Regular expression pattern filter for source files
+            const static AZ::Crc32 SourceAssetFilterPattern = AZ_CRC_CE("SourceAssetFilterPattern");
 
             //! Component icon attributes
             const static AZ::Crc32 Icon = AZ_CRC("Icon", 0x659429db);

Code/Framework/AzCore/AzCore/Serialization/Json/BaseJsonSerializer.cpp

@@ -204,6 +204,22 @@ namespace AZ
     // BaseJsonSerializer
     //
 
+    JsonSerializationResult::Result BaseJsonSerializer::Load(void* outputValue, const Uuid& outputValueTypeId, const rapidjson::Value& inputValue,
+        JsonDeserializerContext& context)
+    {
+        JsonSerializationResult::ResultCode result(JsonSerializationResult::Tasks::ReadField);
+        result.Combine(ContinueLoading(outputValue, outputValueTypeId, inputValue, context, ContinuationFlags::IgnoreTypeSerializer));
+        return context.Report(result, "Ignoring custom serialization during load");
+    }
+
+    JsonSerializationResult::Result BaseJsonSerializer::Store(rapidjson::Value& outputValue, const void* inputValue, const void* defaultValue,
+        const Uuid& valueTypeId, JsonSerializerContext& context)
+    {
+        JsonSerializationResult::ResultCode result(JsonSerializationResult::Tasks::WriteValue);
+        result.Combine(ContinueStoring(outputValue, inputValue, defaultValue, valueTypeId, context, ContinuationFlags::IgnoreTypeSerializer));
+        return context.Report(result, "Ignoring custom serialization during store");
+    }
+
     BaseJsonSerializer::OperationFlags BaseJsonSerializer::GetOperationsFlags() const
     {
         return OperationFlags::None;

Code/Framework/AzCore/AzCore/Serialization/Json/BaseJsonSerializer.h

@@ -180,13 +180,16 @@ namespace AZ
 
         //! Transforms the data from the rapidjson Value to outputValue, if the conversion is possible and supported.
         //! The serializer is responsible for casting to the proper type and safely writing to the outputValue memory.
+        //! \note The default implementation is to load the object ignoring a custom serializers for the type, which allows for custom serializers
+        //! to modify the object after all default loading has occurred.
         virtual JsonSerializationResult::Result Load(void* outputValue, const Uuid& outputValueTypeId, const rapidjson::Value& inputValue,
-            JsonDeserializerContext& context) = 0;
+            JsonDeserializerContext& context);
         
         //! Write the input value to a rapidjson value if the default value is not null and doesn't match the input value, otherwise
         //! an error is returned and sets the rapidjson value to a null value.
+        //! \note The default implementation is to store the object ignoring custom serializers.
         virtual JsonSerializationResult::Result Store(rapidjson::Value& outputValue, const void* inputValue, const void* defaultValue,
-            const Uuid& valueTypeId, JsonSerializerContext& context) = 0;
+            const Uuid& valueTypeId, JsonSerializerContext& context);
 
         //! Returns the operation flags which tells the Json Serialization how this custom json serializer can be used.
         virtual OperationFlags GetOperationsFlags() const;

Code/Framework/AzCore/AzCore/Utils/Utils.cpp

@@ -165,13 +165,12 @@ namespace AZ::Utils
         }
 
         Container fileContent;
-        fileContent.resize(length);
+        fileContent.resize_no_construct(length);
         AZ::IO::SizeType bytesRead = file.Read(length, fileContent.data());
         file.Close();
 
         // Resize again just in case bytesRead is less than length for some reason
-        fileContent.resize(bytesRead);
-
+        fileContent.resize_no_construct(bytesRead);
         return AZ::Success(AZStd::move(fileContent));
     }
 

Code/Framework/AzToolsFramework/AzToolsFramework/AssetBrowser/AssetPicker/AssetPickerDialog.cpp

@@ -99,6 +99,18 @@ namespace AzToolsFramework
                 }
             }
 
+            if (selection.GetSelectedAssetIds().empty())
+            {
+                for (auto& filePath : selection.GetSelectedFilePaths())
+                {
+                    if (!filePath.empty())
+                    {
+                        selectedAsset = true;
+                        m_ui->m_assetBrowserTreeViewWidget->SelectFileAtPath(filePath);
+                    }
+                }
+            }
+
             if (!selectedAsset)
             {
                 m_ui->m_assetBrowserTreeViewWidget->SelectFolder(selection.GetDefaultDirectory());

Code/Framework/AzToolsFramework/AzToolsFramework/AssetBrowser/AssetSelectionModel.cpp

@@ -10,18 +10,24 @@
 #include <AzToolsFramework/AssetBrowser/AssetBrowserBus.h>
 #include <AzToolsFramework/AssetBrowser/EBusFindAssetTypeByName.h>
 
+#if !defined(Q_MOC_RUN)
+AZ_PUSH_DISABLE_WARNING(4251 4800, "-Wunknown-warning-option")
+#include <QRegExp>
+AZ_POP_DISABLE_WARNING
+#endif
+
 namespace AzToolsFramework
 {
     namespace AssetBrowser
     {
         namespace
         {
-            FilterConstType ProductsNoFoldersFilter()
+            FilterConstType EntryTypeNoFoldersFilter(AssetBrowserEntry::AssetEntryType entryType = AssetBrowserEntry::AssetEntryType::Product)
             {
-                EntryTypeFilter* productFilter = new EntryTypeFilter();
-                productFilter->SetEntryType(AssetBrowserEntry::AssetEntryType::Product);
+                EntryTypeFilter* entryTypeFilter = new EntryTypeFilter();
+                entryTypeFilter->SetEntryType(entryType);
                 // in case entry is a source or folder, it may still contain relevant product
-                productFilter->SetFilterPropagation(AssetBrowserEntryFilter::PropagateDirection::Down);
+                entryTypeFilter->SetFilterPropagation(AssetBrowserEntryFilter::PropagateDirection::Down);
 
                 EntryTypeFilter* foldersFilter = new EntryTypeFilter();
                 foldersFilter->SetEntryType(AssetBrowserEntry::AssetEntryType::Folder);
@@ -30,7 +36,7 @@ namespace AzToolsFramework
                 noFoldersFilter->SetFilter(FilterConstType(foldersFilter));
 
                 CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::AND);
-                compFilter->AddFilter(FilterConstType(productFilter));
+                compFilter->AddFilter(FilterConstType(entryTypeFilter));
                 compFilter->AddFilter(FilterConstType(noFoldersFilter));
 
                 return FilterConstType(compFilter);
@@ -79,15 +85,39 @@ namespace AzToolsFramework
 
         void AssetSelectionModel::SetSelectedAssetIds(const AZStd::vector<AZ::Data::AssetId>& selectedAssetIds)
         {
+            m_selectedFilePaths.clear();
+
             m_selectedAssetIds = selectedAssetIds;
         }
 
         void AssetSelectionModel::SetSelectedAssetId(const AZ::Data::AssetId& selectedAssetId)
         {
+            m_selectedFilePaths.clear();
+
             m_selectedAssetIds.clear();
             m_selectedAssetIds.push_back(selectedAssetId);
         }
 
+        const AZStd::vector<AZStd::string>& AssetSelectionModel::GetSelectedFilePaths() const
+        {
+            return m_selectedFilePaths;
+        }
+
+        void AssetSelectionModel::SetSelectedFilePaths(const AZStd::vector<AZStd::string>& selectedFilePaths)
+        {
+            m_selectedAssetIds.clear();
+
+            m_selectedFilePaths = selectedFilePaths;
+        }
+
+        void AssetSelectionModel::SetSelectedFilePath(const AZStd::string& selectedFilePath)
+        {
+            m_selectedAssetIds.clear();
+
+            m_selectedFilePaths.clear();
+            m_selectedFilePaths.push_back(selectedFilePath);
+        }
+
         void AssetSelectionModel::SetDefaultDirectory(AZStd::string_view defaultDirectory)
         {
             m_defaultDirectory = defaultDirectory;
@@ -136,7 +166,7 @@ namespace AzToolsFramework
 
             CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::AND);
             compFilter->AddFilter(assetTypeFilterPtr);
-            compFilter->AddFilter(ProductsNoFoldersFilter());
+            compFilter->AddFilter(EntryTypeNoFoldersFilter());
 
             selection.SetSelectionFilter(FilterConstType(compFilter));
             selection.SetMultiselect(multiselect);
@@ -169,7 +199,7 @@ namespace AzToolsFramework
 
             CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::AND);
             compFilter->AddFilter(anyAssetTypeFilterPtr);
-            compFilter->AddFilter(ProductsNoFoldersFilter());
+            compFilter->AddFilter(EntryTypeNoFoldersFilter());
 
             selection.SetSelectionFilter(FilterConstType(compFilter));
             selection.SetMultiselect(multiselect);
@@ -190,7 +220,28 @@ namespace AzToolsFramework
 
             CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::AND);
             compFilter->AddFilter(assetGroupFilterPtr);
-            compFilter->AddFilter(ProductsNoFoldersFilter());
+            compFilter->AddFilter(EntryTypeNoFoldersFilter());
+
+            selection.SetSelectionFilter(FilterConstType(compFilter));
+            selection.SetMultiselect(multiselect);
+
+            return selection;
+        }
+
+        AssetSelectionModel AssetSelectionModel::SourceAssetTypeSelection(const QString& pattern, bool multiselect)
+        {
+            AssetSelectionModel selection;
+
+            RegExpFilter* patternFilter = new RegExpFilter();
+            patternFilter->SetFilterPattern(pattern);
+            patternFilter->SetFilterPropagation(AssetBrowserEntryFilter::PropagateDirection::Down);
+            auto patternFilterPtr = FilterConstType(patternFilter);
+
+            selection.SetDisplayFilter(patternFilterPtr);
+
+            CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::AND);
+            compFilter->AddFilter(patternFilterPtr);
+            compFilter->AddFilter(EntryTypeNoFoldersFilter(AssetBrowserEntry::AssetEntryType::Source));
 
             selection.SetSelectionFilter(FilterConstType(compFilter));
             selection.SetMultiselect(multiselect);
@@ -204,7 +255,7 @@ namespace AzToolsFramework
          
             CompositeFilter* compFilter = new CompositeFilter(CompositeFilter::LogicOperatorType::OR);
             selection.SetDisplayFilter(FilterConstType(compFilter));
-            selection.SetSelectionFilter(ProductsNoFoldersFilter());
+            selection.SetSelectionFilter(EntryTypeNoFoldersFilter());
             selection.SetMultiselect(multiselect);
 
             return selection;

Code/Framework/AzToolsFramework/AzToolsFramework/AssetBrowser/AssetSelectionModel.h

@@ -44,6 +44,10 @@ namespace AzToolsFramework
             void SetSelectedAssetIds(const AZStd::vector<AZ::Data::AssetId>& selectedAssetIds);
             void SetSelectedAssetId(const AZ::Data::AssetId& selectedAssetId);
 
+            const AZStd::vector<AZStd::string>& GetSelectedFilePaths() const;
+            void SetSelectedFilePaths(const AZStd::vector<AZStd::string>& selectedFilePaths);
+            void SetSelectedFilePath(const AZStd::string& selectedFilePath);
+
             void SetDefaultDirectory(AZStd::string_view defaultDirectory);
             AZStd::string_view GetDefaultDirectory() const;
             
@@ -60,6 +64,7 @@ namespace AzToolsFramework
             static AssetSelectionModel AssetTypeSelection(const char* assetTypeName, bool multiselect = false);
             static AssetSelectionModel AssetTypesSelection(const AZStd::vector<AZ::Data::AssetType>& assetTypes, bool multiselect = false);
             static AssetSelectionModel AssetGroupSelection(const char* group, bool multiselect = false);
+            static AssetSelectionModel SourceAssetTypeSelection(const QString& pattern, bool multiselect = false);
             static AssetSelectionModel EverythingSelection(bool multiselect = false);
 
         private:
@@ -68,8 +73,12 @@ namespace AzToolsFramework
             // some entries like folder should always be displayed, but not always selectable, thus 2 separate filters
             FilterConstType m_selectionFilter;
             FilterConstType m_displayFilter;
-            
+
+            //! Selection can be based on asset ids (for products), or file paths (for sources)
+            //! These are mututally exclusive
             AZStd::vector<AZ::Data::AssetId> m_selectedAssetIds;
+            AZStd::vector<AZStd::string> m_selectedFilePaths;
+
             AZStd::vector<const AssetBrowserEntry*> m_results;
             AZStd::string m_defaultDirectory;
 

Code/Framework/AzToolsFramework/AzToolsFramework/AssetBrowser/Search/Filter.cpp

@@ -251,6 +251,40 @@ namespace AzToolsFramework
             return false;
         }
 
+        //////////////////////////////////////////////////////////////////////////
+        // RegExpFilter
+        //////////////////////////////////////////////////////////////////////////
+        RegExpFilter::RegExpFilter()
+            : m_filterPattern("")
+        {
+        }
+
+        void RegExpFilter::SetFilterPattern(const QString& filterPattern)
+        {
+            m_filterPattern = filterPattern;
+            Q_EMIT updatedSignal();
+        }
+
+        QString RegExpFilter::GetNameInternal() const
+        {
+            return m_filterPattern;
+        }
+
+        bool RegExpFilter::MatchInternal(const AssetBrowserEntry* entry) const
+        {
+            // no filter pattern matches any asset
+            if (m_filterPattern.isEmpty())
+            {
+                return true;
+            }
+
+            // entry's name matches regular expression pattern
+            QRegExp regExp(m_filterPattern);
+            regExp.setPatternSyntax(QRegExp::Wildcard);
+
+            return regExp.exactMatch(entry->GetDisplayName());
+        }
+
         //////////////////////////////////////////////////////////////////////////
         // AssetTypeFilter
         //////////////////////////////////////////////////////////////////////////

Code/Framework/AzToolsFramework/AzToolsFramework/AssetBrowser/Search/Filter.h

@@ -115,6 +115,28 @@ namespace AzToolsFramework
             QString m_filterString;
         };
 
+        //////////////////////////////////////////////////////////////////////////
+        // RegExpFilter
+        //////////////////////////////////////////////////////////////////////////
+        //! RegExpFilter filters assets based on a regular expression pattern
+        class RegExpFilter
+            : public AssetBrowserEntryFilter
+        {
+            Q_OBJECT
+        public:
+            RegExpFilter();
+            ~RegExpFilter() override = default;
+
+            void SetFilterPattern(const QString& filterPattern);
+
+        protected:
+            QString GetNameInternal() const override;
+            bool MatchInternal(const AssetBrowserEntry* entry) const override;
+
+        private:
+            QString m_filterPattern;
+        };
+
         //////////////////////////////////////////////////////////////////////////
         // AssetTypeFilter
         //////////////////////////////////////////////////////////////////////////

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/Model/AssetCompleterModel.cpp

@@ -39,7 +39,12 @@ namespace AzToolsFramework
         typeFilter->SetAssetType(filterType);
         typeFilter->SetFilterPropagation(AssetBrowserEntryFilter::PropagateDirection::Down);
 
-        m_assetBrowserFilterModel->SetFilter(FilterConstType(typeFilter));
+        SetFilter(FilterConstType(typeFilter));
+    }
+
+    void AssetCompleterModel::SetFilter(FilterConstType filter)
+    {
+        m_assetBrowserFilterModel->SetFilter(filter);
 
         RefreshAssetList();
     }
@@ -120,9 +125,6 @@ namespace AzToolsFramework
         int rows = m_assetBrowserFilterModel->rowCount(index);
         if (rows == 0)
         {
-            if (index != QModelIndex()) {
-                AZ_Error("AssetCompleterModel", false, "No children detected in FetchResources()");
-            }
             return;
         }
 
@@ -131,7 +133,7 @@ namespace AzToolsFramework
             QModelIndex childIndex = m_assetBrowserFilterModel->index(i, 0, index);
             AssetBrowserEntry* childEntry = GetAssetEntry(m_assetBrowserFilterModel->mapToSource(childIndex));
 
-            if (childEntry->GetEntryType() == AssetBrowserEntry::AssetEntryType::Product)
+            if (childEntry->GetEntryType() == m_entryType)
             {
                 ProductAssetBrowserEntry* productEntry = static_cast<ProductAssetBrowserEntry*>(childEntry);
                 AZStd::string assetName;
@@ -167,7 +169,6 @@ namespace AzToolsFramework
         return m_assets[index.row()].m_displayName;
     }
 
-
     const AZ::Data::AssetId AssetCompleterModel::GetAssetIdFromIndex(const QModelIndex& index) 
     {
         if (!index.isValid())
@@ -177,4 +178,19 @@ namespace AzToolsFramework
 
         return m_assets[index.row()].m_assetId;
     }
+
+    const AZStd::string_view AssetCompleterModel::GetPathFromIndex(const QModelIndex& index)
+    {
+        if (!index.isValid())
+        {
+            return "";
+        }
+
+        return m_assets[index.row()].m_path;
+    }
+
+    void AssetCompleterModel::SetFetchEntryType(AssetBrowserEntry::AssetEntryType entryType)
+    {
+        m_entryType = entryType;
+    }
 }

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/Model/AssetCompleterModel.h

@@ -32,6 +32,7 @@ namespace AzToolsFramework
         QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
 
         void SetFilter(AZ::Data::AssetType filterType);
+        void SetFilter(FilterConstType filter);
         void RefreshAssetList();
         void SearchStringHighlight(QString searchString);
 
@@ -39,6 +40,9 @@ namespace AzToolsFramework
 
         const AZStd::string_view GetNameFromIndex(const QModelIndex& index);
         const AZ::Data::AssetId GetAssetIdFromIndex(const QModelIndex& index);
+        const AZStd::string_view GetPathFromIndex(const QModelIndex& index);
+
+        void SetFetchEntryType(AssetBrowserEntry::AssetEntryType entryType);
 
     private:
         struct AssetItem 
@@ -57,6 +61,8 @@ namespace AzToolsFramework
         AZStd::vector<AssetItem> m_assets;
         //! String that will be highlighted in the suggestions
         QString m_highlightString;
+
+        AssetBrowserEntry::AssetEntryType m_entryType = AssetBrowserEntry::AssetEntryType::Product;
     };
 
 }

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAssetCtrl.cpp

@@ -1288,7 +1288,7 @@ namespace AzToolsFramework
         return newCtrl;
     }
 
-    void AssetPropertyHandlerDefault::ConsumeAttribute(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName)
+    void AssetPropertyHandlerDefault::ConsumeAttributeInternal(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName)
     {
         (void)debugName;
 
@@ -1487,6 +1487,11 @@ namespace AzToolsFramework
         }
     }
 
+    void AssetPropertyHandlerDefault::ConsumeAttribute(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName)
+    {
+        ConsumeAttributeInternal(GUI, attrib, attrValue, debugName);
+    }
+
     void AssetPropertyHandlerDefault::WriteGUIValuesIntoProperty(size_t index, PropertyAssetCtrl* GUI, property_t& instance, InstanceDataNode* node)
     {
         (void)index;
@@ -1629,8 +1634,8 @@ namespace AzToolsFramework
 
     void RegisterAssetPropertyHandler()
     {
-        EBUS_EVENT(PropertyTypeRegistrationMessages::Bus, RegisterPropertyType, aznew AssetPropertyHandlerDefault());
-        EBUS_EVENT(PropertyTypeRegistrationMessages::Bus, RegisterPropertyType, aznew SimpleAssetPropertyHandlerDefault());
+        PropertyTypeRegistrationMessages::Bus::Broadcast(&PropertyTypeRegistrationMessages::RegisterPropertyType, aznew AssetPropertyHandlerDefault());
+        PropertyTypeRegistrationMessages::Bus::Broadcast(&PropertyTypeRegistrationMessages::RegisterPropertyType, aznew SimpleAssetPropertyHandlerDefault());
     }
 }
 

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAssetCtrl.hxx

@@ -175,10 +175,11 @@ namespace AzToolsFramework
         virtual void SetFolderSelection(const AZStd::string& /* folderPath */) {}
         virtual void ClearAssetInternal();
 
-        void ConfigureAutocompleter();
+        virtual void ConfigureAutocompleter();
         void RefreshAutocompleter();
         void EnableAutocompleter();
         void DisableAutocompleter();
+        const QModelIndex GetSourceIndex(const QModelIndex& index);
 
         void HandleFieldClear();
         AZStd::string AddDefaultSuffix(const AZStd::string& filename);
@@ -235,20 +236,19 @@ namespace AzToolsFramework
         void SetSelectedAssetID(const AZ::Data::AssetId& newID, const AZ::Data::AssetType& newType);
         void SetCurrentAssetHint(const AZStd::string& hint);
         void SetDefaultAssetID(const AZ::Data::AssetId& defaultID);
-        void PopupAssetPicker();
+        virtual void PopupAssetPicker();
         void OnClearButtonClicked();
         void UpdateAssetDisplay();
         void OnLineEditFocus(bool focus);
         virtual void OnEditButtonClicked();
         void OnThumbnailClicked();
         void OnCompletionModelReset();
-        void OnAutocomplete(const QModelIndex& index);
+        virtual void OnAutocomplete(const QModelIndex& index);
         void OnTextChange(const QString& text);
         void OnReturnPressed();
         void ShowContextMenu(const QPoint& pos);
 
     private:
-        const QModelIndex GetSourceIndex(const QModelIndex& index);
         void UpdateThumbnail();
     };
 
@@ -270,7 +270,8 @@ namespace AzToolsFramework
         virtual void UpdateWidgetInternalTabbing(PropertyAssetCtrl* widget) override { widget->UpdateTabOrder(); }
 
         virtual QWidget* CreateGUI(QWidget* pParent) override;
-        virtual void ConsumeAttribute(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName) override;
+        static void ConsumeAttributeInternal(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName);
+        void ConsumeAttribute(PropertyAssetCtrl* GUI, AZ::u32 attrib, PropertyAttributeReader* attrValue, const char* debugName) override;
         virtual void WriteGUIValuesIntoProperty(size_t index, PropertyAssetCtrl* GUI, property_t& instance, InstanceDataNode* node) override;
         virtual bool ReadValuesIntoGUI(size_t index, PropertyAssetCtrl* GUI, const property_t& instance, InstanceDataNode* node)  override;
     };

Gems/GraphCanvas/Code/Source/Components/SceneComponent.cpp

@@ -669,6 +669,7 @@ namespace GraphCanvas
     {
         GeometryNotificationBus::Handler::BusDisconnect();
         SceneNotificationBus::Handler::BusDisconnect();
+        AZ::SystemTickBus::Handler::BusDisconnect();
     }
 
     void GestureSceneHelper::TrackElement(const AZ::EntityId& elementId)

Gems/GraphCanvas/Code/Source/Translation/TranslationAsset.cpp

@@ -195,7 +195,7 @@ namespace GraphCanvas
                     }
                     else
                     {
-                        AZ_Error("TranslationAsset", false, "Serialization of the TranslationFormat failed for: %s", asset.GetHint().c_str());
+                        AZ_Warning("TranslationAsset", false, "Serialization of the TranslationFormat failed for: %s", asset.GetHint().c_str());
                     }
                 }
             }

Gems/ScriptCanvas/Code/Asset/EditorAssetConversionBus.h

@@ -26,17 +26,14 @@ namespace ScriptCanvas
 
 namespace ScriptCanvasEditor
 {
-    class ScriptCanvasAsset;
-
     class EditorAssetConversionBusTraits
         : public AZ::EBusTraits
     {
     public:
         static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::Single;
       
-        virtual AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> LoadAsset(AZStd::string_view graphPath) = 0;
-        virtual AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset, AZStd::string_view graphPathForRawLuaFile) = 0;
-        virtual AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset) = 0;
+        virtual AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const SourceHandle& editAsset, AZStd::string_view graphPathForRawLuaFile) = 0;
+        virtual AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const SourceHandle& editAsset) = 0;
     };
 
     using EditorAssetConversionBus = AZ::EBus<EditorAssetConversionBusTraits>;

Gems/ScriptCanvas/Code/Asset/EditorAssetSystemComponent.cpp

@@ -64,7 +64,6 @@ namespace ScriptCanvasEditor
 
     void EditorAssetSystemComponent::Activate()
     {
-        m_editorAssetRegistry.Register<ScriptCanvasAsset, ScriptCanvasAssetHandler, ScriptCanvasAssetDescription>();
         m_editorAssetRegistry.Register<ScriptCanvas::SubgraphInterfaceAsset, ScriptCanvas::SubgraphInterfaceAssetHandler, ScriptCanvas::SubgraphInterfaceAssetDescription>();
 
         AzToolsFramework::AssetBrowser::AssetBrowserInteractionNotificationBus::Handler::BusConnect();
@@ -98,35 +97,25 @@ namespace ScriptCanvasEditor
         return false;
     }
 
-    AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> EditorAssetSystemComponent::LoadAsset(AZStd::string_view graphPath)
-    {
-        auto outcome = ScriptCanvasBuilder::LoadEditorAsset(graphPath, AZ::Data::AssetId(AZ::Uuid::CreateRandom()));
-
-        if (outcome.IsSuccess())
-        {
-            return outcome.GetValue();
-        }
-        else
-        {
-            return {};
-        }
-    }
-
-    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> EditorAssetSystemComponent::CreateRuntimeAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset)
+    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> EditorAssetSystemComponent::CreateRuntimeAsset(const SourceHandle& editAsset)
     {
         return ScriptCanvasBuilder::CreateRuntimeAsset(editAsset);
     }
 
-    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> EditorAssetSystemComponent::CreateLuaAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset, AZStd::string_view graphPathForRawLuaFile)
+    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> EditorAssetSystemComponent::CreateLuaAsset(const SourceHandle& editAsset, AZStd::string_view graphPathForRawLuaFile)
     {
-        return ScriptCanvasBuilder::CreateLuaAsset(editAsset->GetScriptCanvasEntity(), editAsset->GetId(), graphPathForRawLuaFile);
+        return ScriptCanvasBuilder::CreateLuaAsset(editAsset, graphPathForRawLuaFile);
     }
 
-    void EditorAssetSystemComponent::AddSourceFileOpeners([[maybe_unused]] const char* fullSourceFileName, const AZ::Uuid& sourceUuid, AzToolsFramework::AssetBrowser::SourceFileOpenerList& openers)
+    void EditorAssetSystemComponent::AddSourceFileOpeners
+        ( [[maybe_unused]] const char* fullSourceFileName
+        , const AZ::Uuid& sourceUuid
+        , AzToolsFramework::AssetBrowser::SourceFileOpenerList& openers)
     {
         using namespace AzToolsFramework;
         using namespace AzToolsFramework::AssetBrowser;
-        if (const SourceAssetBrowserEntry* source = SourceAssetBrowserEntry::GetSourceByUuid(sourceUuid))  // get the full details of the source file based on its UUID.
+        // get the full details of the source file based on its UUID.
+        if (const SourceAssetBrowserEntry* source = SourceAssetBrowserEntry::GetSourceByUuid(sourceUuid))  
         {
             if (!HandlesSource(source))
             {
@@ -138,22 +127,31 @@ namespace ScriptCanvasEditor
             // has no UUID / Not a source file.
             return;
         }
-        // You can push back any number of "Openers" - choose a unique identifier, and icon, and then a lambda which will be activated if the user chooses to open it with your opener:
-        openers.push_back({ "ScriptCanvas_Editor_Asset_Edit", "Script Canvas Editor...", QIcon(),
+
+        // You can push back any number of "Openers" - choose a unique identifier, and icon,
+        // and then a lambda which will be activated if the user chooses to open it with your opener:
+
+        openers.push_back({ "ScriptCanvas_Editor_Asset_Edit", "Script Canvas Editor..."
+            , QIcon(ScriptCanvasAssetDescription().GetIconPathImpl()),
             [](const char*, const AZ::Uuid& scSourceUuid)
-        {
-            AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
-            AZ::Data::AssetId sourceAssetId(scSourceUuid, 0);
-
-            auto& assetManager = AZ::Data::AssetManager::Instance();
-            AZ::Data::Asset<ScriptCanvasAsset> scriptCanvasAsset = assetManager.GetAsset(sourceAssetId, azrtti_typeid<ScriptCanvasAsset>(), AZ::Data::AssetLoadBehavior::Default);
-            AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
-            GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, scriptCanvasAsset.GetId(), -1);
-            if (!openOutcome)
             {
-                AZ_Warning("Script Canvas", openOutcome, "%s", openOutcome.GetError().data());
-            }
-        } });
+                AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
 
+                if (auto sourceHandle = CompleteDescription(SourceHandle(nullptr, scSourceUuid, {})))
+                {
+                    AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
+                    GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset
+                        , *sourceHandle, Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
+                    if (!openOutcome)
+                    {
+                        AZ_Warning("ScriptCanvas", openOutcome, "%s", openOutcome.GetError().data());
+                    }
+                }
+                else
+                {
+                    AZ_Warning("ScriptCanvas", false
+                        , "Unabled to find full path for Source UUid %s", scSourceUuid.ToString<AZStd::string>().c_str());
+                }            
+            }});
     }
 }

Gems/ScriptCanvas/Code/Asset/EditorAssetSystemComponent.h

@@ -49,9 +49,8 @@ namespace ScriptCanvasEditor
 
         //////////////////////////////////////////////////////////////////////////
         // EditorAssetConversionBus::Handler...
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> LoadAsset(AZStd::string_view graphPath) override;
-        AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset) override;
-        AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset, AZStd::string_view graphPathForRawLuaFile) override;
+        AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const SourceHandle& editAsset) override;
+        AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const SourceHandle& editAsset, AZStd::string_view graphPathForRawLuaFile) override;
         //////////////////////////////////////////////////////////////////////////
         
         ScriptCanvas::AssetRegistry& GetAssetRegistry();

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilder.cpp

@@ -13,15 +13,50 @@
 #include <ScriptCanvas/Components/EditorGraphVariableManagerComponent.h>
 #include <ScriptCanvas/Grammar/AbstractCodeModel.h>
 #include <AzCore/Asset/AssetSerializer.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
+#include <ScriptCanvas/Components/EditorGraph.h>
 
-namespace ScriptCanvasBuilderCpp
+namespace BuildVariableOverridesCpp
 {
-    void AppendTabs(AZStd::string& result, size_t depth)
+    enum Version
     {
-        for (size_t i = 0; i < depth; ++i)
+        Original = 1,
+        EditorAssetRedux,
+
+        // add description above
+        Current
+    };
+
+    bool VersionConverter
+        ( AZ::SerializeContext& serializeContext
+        , AZ::SerializeContext::DataElementNode& rootElement)
+    {
+        if (rootElement.GetVersion() < BuildVariableOverridesCpp::Version::EditorAssetRedux)
         {
-            result += "\t";
+            auto sourceIndex = rootElement.FindElement(AZ_CRC_CE("source"));
+            if (sourceIndex == -1)
+            {
+                AZ_Error("ScriptCanvas", false, "BuildVariableOverrides coversion failed: 'source' was missing");
+                return false;
+            }
+
+            auto& sourceElement = rootElement.GetSubElement(sourceIndex);
+            AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> asset;
+            if (!sourceElement.GetData(asset))
+            {
+                AZ_Error("ScriptCanvas", false, "BuildVariableOverrides coversion failed: could not retrieve 'source' data");
+                return false;
+            }
+
+            ScriptCanvasEditor::SourceHandle sourceHandle(nullptr, asset.GetId().m_guid, {});
+            if (!rootElement.AddElementWithData(serializeContext, "source", sourceHandle))
+            {
+                AZ_Error("ScriptCanvas", false, "BuildVariableOverrides coversion failed: could not add updated 'source' data");
+                return false;
+            }
         }
+
+        return true;
     }
 }
 
@@ -29,7 +64,7 @@ namespace ScriptCanvasBuilder
 {
     void BuildVariableOverrides::Clear()
     {
-        m_source.Reset();
+        m_source = {};
         m_variables.clear();
         m_overrides.clear();
         m_overridesUnused.clear();
@@ -39,12 +74,20 @@ namespace ScriptCanvasBuilder
 
     void BuildVariableOverrides::CopyPreviousOverriddenValues(const BuildVariableOverrides& source)
     {
-        auto copyPreviousIfFound = [](ScriptCanvas::GraphVariable& overriddenValue, const AZStd::vector<ScriptCanvas::GraphVariable>& source)
+        auto isEqual = [](const ScriptCanvas::GraphVariable& lhs, const ScriptCanvas::GraphVariable& rhs)
         {
-            if (auto iter = AZStd::find_if(source.begin(), source.end(), [&overriddenValue](const auto& candidate) { return candidate.GetVariableId() == overriddenValue.GetVariableId(); });
-            iter != source.end())
+            return (lhs.GetVariableId() == rhs.GetVariableId() && lhs.GetDataType() == rhs.GetDataType())
+                || (lhs.GetVariableName() == rhs.GetVariableName() && lhs.GetDataType() == rhs.GetDataType());
+        };
+
+        auto copyPreviousIfFound = [isEqual](ScriptCanvas::GraphVariable& overriddenValue, const AZStd::vector<ScriptCanvas::GraphVariable>& source)
+        {
+            auto iter = AZStd::find_if(source.begin(), source.end()
+                , [&overriddenValue, isEqual](const auto& candidate) { return isEqual(candidate, overriddenValue); });
+
+            if (iter != source.end())
             {
-                overriddenValue.DeepCopy(*iter);
+                overriddenValue.ModDatum().DeepCopyDatum(*iter->GetDatum());
                 overriddenValue.SetScriptInputControlVisibility(AZ::Edit::PropertyVisibility::Hide);
                 overriddenValue.SetAllowSignalOnChange(false);
                 return true;
@@ -64,6 +107,15 @@ namespace ScriptCanvasBuilder
             }
         }
 
+        for (auto& overriddenValue : m_overridesUnused)
+        {
+            if (!copyPreviousIfFound(overriddenValue, source.m_overridesUnused))
+            {
+                // the variable in question may have been previously used, and is now unused, so copy the previous value over
+                copyPreviousIfFound(overriddenValue, source.m_overrides);
+            }
+        }
+
         //////////////////////////////////////////////////////////////////////////
         // #functions2 provide an identifier for the node/variable in the source that caused the dependency. the root will not have one.
         // the above will provide the data to handle the cases where only certain dependency nodes were removed
@@ -100,7 +152,7 @@ namespace ScriptCanvasBuilder
         if (auto serializeContext = azrtti_cast<AZ::SerializeContext*>(reflectContext))
         {
             serializeContext->Class<BuildVariableOverrides>()
-                ->Version(1)
+                ->Version(BuildVariableOverridesCpp::Version::Current, &BuildVariableOverridesCpp::VersionConverter)
                 ->Field("source", &BuildVariableOverrides::m_source)
                 ->Field("variables", &BuildVariableOverrides::m_variables)
                 ->Field("entityId", &BuildVariableOverrides::m_entityIds)
@@ -194,45 +246,12 @@ namespace ScriptCanvasBuilder
         }
     }
 
-    EditorAssetTree* EditorAssetTree::ModRoot()
-    {
-        if (!m_parent)
-        {
-            return this;
-        }
-
-        return m_parent->ModRoot();
-    }
-
-    void EditorAssetTree::SetParent(EditorAssetTree& parent)
-    {
-        m_parent = &parent;
-    }
-
-    AZStd::string EditorAssetTree::ToString(size_t depth) const
-    {
-        AZStd::string result;
-        ScriptCanvasBuilderCpp::AppendTabs(result, depth);
-        result += m_asset.GetId().ToString<AZStd::string>();
-        result += m_asset.GetHint();
-        depth += m_dependencies.empty() ? 0 : 1;
-
-        for (const auto& dependency : m_dependencies)
-        {
-            result += "\n";
-            ScriptCanvasBuilderCpp::AppendTabs(result, depth);
-            result += dependency.ToString(depth);
-        }
-
-        return result;
-    }
-
     ScriptCanvas::RuntimeDataOverrides ConvertToRuntime(const BuildVariableOverrides& buildOverrides)
     {
         ScriptCanvas::RuntimeDataOverrides runtimeOverrides;
 
         runtimeOverrides.m_runtimeAsset = AZ::Data::Asset<ScriptCanvas::RuntimeAsset>
-            (AZ::Data::AssetId(buildOverrides.m_source.GetId().m_guid, AZ_CRC("RuntimeData", 0x163310ae)), azrtti_typeid<ScriptCanvas::RuntimeAsset>(), {});
+            (AZ::Data::AssetId(buildOverrides.m_source.Id(), AZ_CRC("RuntimeData", 0x163310ae)), azrtti_typeid<ScriptCanvas::RuntimeAsset>(), {});
         runtimeOverrides.m_runtimeAsset.SetAutoLoadBehavior(AZ::Data::AssetLoadBehavior::PreLoad);
         runtimeOverrides.m_variableIndices.resize(buildOverrides.m_variables.size());
 
@@ -295,76 +314,9 @@ namespace ScriptCanvasBuilder
         return runtimeOverrides;
     }
 
-    AZ::Outcome<EditorAssetTree, AZStd::string> LoadEditorAssetTree(AZ::Data::AssetId editorAssetId, AZStd::string_view assetHint, EditorAssetTree* parent)
+    AZ::Outcome<BuildVariableOverrides, AZStd::string> ParseEditorAssetTree(const ScriptCanvasEditor::EditorAssetTree& editorAssetTree)
     {
-        EditorAssetTree result;
-        AZ::Data::AssetInfo assetInfo;
-        AZStd::string watchFolder;
-        bool resultFound = false;
-
-        if (!AzToolsFramework::AssetSystemRequestBus::FindFirstHandler())
-        {
-            return AZ::Failure(AZStd::string("LoadEditorAssetTree found no handler for AzToolsFramework::AssetSystemRequestBus."));
-        }
-
-        AzToolsFramework::AssetSystemRequestBus::BroadcastResult
-            ( resultFound
-            , &AzToolsFramework::AssetSystem::AssetSystemRequest::GetSourceInfoBySourceUUID
-            , editorAssetId.m_guid
-            , assetInfo
-            , watchFolder);
-
-        if (!resultFound)
-        {
-            return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to get engine relative path from %s-%.*s.", editorAssetId.ToString<AZStd::string>().c_str(), aznumeric_cast<int>(assetHint.size()), assetHint.data()));
-        }
-
-        AZStd::vector<AZ::Data::AssetId> dependentAssets;
-
-        auto filterCB = [&dependentAssets](const AZ::Data::AssetFilterInfo& filterInfo)->bool
-        {
-            if (filterInfo.m_assetType == azrtti_typeid<ScriptCanvas::SubgraphInterfaceAsset>())
-            {
-                dependentAssets.push_back(AZ::Data::AssetId(filterInfo.m_assetId.m_guid, 0));
-            }
-            else if (filterInfo.m_assetType == azrtti_typeid<ScriptCanvasEditor::ScriptCanvasAsset>())
-            {
-                dependentAssets.push_back(filterInfo.m_assetId);
-            }
-
-            return true;
-        };
-
-        auto loadAssetOutcome = ScriptCanvasBuilder::LoadEditorAsset(assetInfo.m_relativePath, editorAssetId, filterCB);
-        if (!loadAssetOutcome.IsSuccess())
-        {
-            return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to load graph from %s-%s: %s", editorAssetId.ToString<AZStd::string>().c_str(), assetHint.data(), loadAssetOutcome.GetError().c_str()));
-        }
-
-        for (auto& dependentAsset : dependentAssets)
-        {
-            auto loadDependentOutcome = LoadEditorAssetTree(dependentAsset, "", &result);
-            if (!loadDependentOutcome.IsSuccess())
-            {
-                return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to load dependent graph from %s-%s: %s", editorAssetId.ToString<AZStd::string>().c_str(), assetHint.data(), loadDependentOutcome.GetError().c_str()));
-            }
-
-            result.m_dependencies.push_back(loadDependentOutcome.TakeValue());
-        }
-
-        if (parent)
-        {
-            result.SetParent(*parent);
-        }
-
-        result.m_asset = loadAssetOutcome.TakeValue();
-
-        return AZ::Success(result);
-    }
-
-    AZ::Outcome<BuildVariableOverrides, AZStd::string> ParseEditorAssetTree(const EditorAssetTree& editorAssetTree)
-    {
-        auto buildEntity = editorAssetTree.m_asset->GetScriptCanvasEntity();
+        auto buildEntity = editorAssetTree.m_asset.Get()->GetEntity();
         if (!buildEntity)
         {
             return AZ::Failure(AZStd::string("No entity from source asset"));
@@ -400,9 +352,8 @@ namespace ScriptCanvasBuilder
             if (!parseDependentOutcome.IsSuccess())
             {
                 return AZ::Failure(AZStd::string::format
-                    ( "ParseEditorAssetTree failed to parse dependent graph from %s-%s: %s"
-                    , dependentAsset.m_asset.GetId().ToString<AZStd::string>().c_str()
-                    , dependentAsset.m_asset.GetHint().c_str()
+                    ( "ParseEditorAssetTree failed to parse dependent graph from %s: %s"
+                    , dependentAsset.m_asset.ToString().c_str()
                     , parseDependentOutcome.GetError().c_str()));
             }
 

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilder.h

@@ -16,6 +16,7 @@
 namespace ScriptCanvasEditor
 {
     class ScriptCanvasAsset;
+    class EditorAssetTree;
 }
 
 namespace ScriptCanvasBuilder
@@ -39,8 +40,8 @@ namespace ScriptCanvasBuilder
         void PopulateFromParsedResults(ScriptCanvas::Grammar::AbstractCodeModelConstPtr abstractCodeModel, const ScriptCanvas::VariableData& variables);
 
         // #functions2 provide an identifier for the node/variable in the source that caused the dependency. the root will not have one.
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> m_source;
-
+        ScriptCanvasEditor::SourceHandle m_source;
+        
         // all of the variables here are overrides
         AZStd::vector<ScriptCanvas::GraphVariable> m_variables;
         // the values here may or may not be overrides
@@ -48,30 +49,11 @@ namespace ScriptCanvasBuilder
         // these two variable lists are all that gets exposed to the edit context
         AZStd::vector<ScriptCanvas::GraphVariable> m_overrides;
         AZStd::vector<ScriptCanvas::GraphVariable> m_overridesUnused;
-        // AZStd::vector<size_t> m_entityIdRuntimeInputIndices; since all of the entity ids need to go in, they may not need indices
         AZStd::vector<BuildVariableOverrides> m_dependencies;
     };
 
-    class EditorAssetTree
-    {
-    public:
-        AZ_CLASS_ALLOCATOR(EditorAssetTree, AZ::SystemAllocator, 0);
-
-        EditorAssetTree* m_parent = nullptr;
-        AZStd::vector<EditorAssetTree> m_dependencies;
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> m_asset;
-
-        EditorAssetTree* ModRoot();
-
-        void SetParent(EditorAssetTree& parent);
-
-        AZStd::string ToString(size_t depth = 0) const;
-    };
-
     // copy the variables overridden during editor / prefab build time back to runtime data
     ScriptCanvas::RuntimeDataOverrides ConvertToRuntime(const BuildVariableOverrides& overrides);
 
-    AZ::Outcome<EditorAssetTree, AZStd::string> LoadEditorAssetTree(AZ::Data::AssetId editorAssetId, AZStd::string_view assetHint, EditorAssetTree* parent = nullptr);
-
-    AZ::Outcome<BuildVariableOverrides, AZStd::string> ParseEditorAssetTree(const EditorAssetTree& editorAssetTree);
+    AZ::Outcome<BuildVariableOverrides, AZStd::string> ParseEditorAssetTree(const ScriptCanvasEditor::EditorAssetTree& editorAssetTree);
 }

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilderComponent.cpp

@@ -48,7 +48,6 @@ namespace ScriptCanvasBuilder
     SharedHandlers HandleAssetTypes()
     {
         SharedHandlers handlers;
-        handlers.m_editorAssetHandler = RegisterHandler<ScriptCanvasEditor::ScriptCanvasAsset, ScriptCanvasEditor::ScriptCanvasAssetHandler>("scriptcanvas", false);
         handlers.m_subgraphInterfaceHandler = RegisterHandler<ScriptCanvas::SubgraphInterfaceAsset, ScriptCanvas::SubgraphInterfaceAssetHandler>("scriptcanvas_fn_compiled", true);
         handlers.m_runtimeAssetHandler = RegisterHandler<ScriptCanvas::RuntimeAsset, JobDependencyVerificationHandler>("scriptcanvas_compiled", true);
 

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilderWorker.cpp

@@ -19,6 +19,7 @@
 #include <ScriptCanvas/Asset/RuntimeAssetHandler.h>
 #include <ScriptCanvas/Asset/SubgraphInterfaceAssetHandler.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAssetHandler.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 #include <ScriptCanvas/Components/EditorGraph.h>
 #include <ScriptCanvas/Components/EditorGraphVariableManagerComponent.h>
 #include <ScriptCanvas/Core/Connection.h>
@@ -27,12 +28,12 @@
 #include <ScriptCanvas/Grammar/AbstractCodeModel.h>
 #include <ScriptCanvas/Results/ErrorText.h>
 #include <ScriptCanvas/Utils/BehaviorContextUtils.h>
+#include <ScriptCanvas/Core/Core.h>
 
 namespace ScriptCanvasBuilder
 {
     void Worker::Activate(const AssetHandlers& handlers)
     {
-        m_editorAssetHandler = handlers.m_editorAssetHandler;
         m_runtimeAssetHandler = handlers.m_runtimeAssetHandler;
         m_subgraphInterfaceHandler = handlers.m_subgraphInterfaceHandler;
     }
@@ -44,54 +45,22 @@ namespace ScriptCanvasBuilder
         AzFramework::StringFunc::Path::ConstructFull(request.m_watchFolder.data(), request.m_sourceFile.data(), fullPath, false);
         AzFramework::StringFunc::Path::Normalize(fullPath);
 
-        if (!m_editorAssetHandler)
-        {
-            AZ_Error(s_scriptCanvasBuilder, false, R"(CreateJobs for %s failed because the ScriptCanvas Editor Asset handler is missing.)", fullPath.data());
-        }
-
-        AZStd::shared_ptr<AZ::Data::AssetDataStream> assetDataStream = AZStd::make_shared<AZ::Data::AssetDataStream>();
-
-        AZ::IO::FileIOStream stream(fullPath.c_str(), AZ::IO::OpenMode::ModeRead);
-        if (!AZ::IO::RetryOpenStream(stream))
-        {
-            AZ_Warning(s_scriptCanvasBuilder, false, "CreateJobs for \"%s\" failed because the source file could not be opened.", fullPath.data());
-            return;
-        }
-
-        // Read the asset into a memory buffer, then hand ownership of the buffer to assetDataStream
-        {
-            AZ::IO::FileIOStream ioStream;
-            if (!ioStream.Open(fullPath.data(), AZ::IO::OpenMode::ModeRead))
-            {
-                AZ_Warning(s_scriptCanvasBuilder, false, "CreateJobs for \"%s\" failed because the source file could not be opened.", fullPath.data());
-                return;
-            }
-
-            AZStd::vector<AZ::u8> fileBuffer(ioStream.GetLength());
-            size_t bytesRead = ioStream.Read(fileBuffer.size(), fileBuffer.data());
-            if (bytesRead != ioStream.GetLength())
-            {
-                AZ_Warning(s_scriptCanvasBuilder, false, AZStd::string::format("File failed to read completely: %s", fullPath.data()).c_str());
-                return;
-            }
-
-            assetDataStream->Open(AZStd::move(fileBuffer));
-        }
-
-        m_processEditorAssetDependencies.clear();
-
         AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> asset;
-        asset.Create(AZ::Data::AssetId(AZ::Uuid::CreateRandom()));
-        if (m_editorAssetHandler->LoadAssetDataFromStream(asset, assetDataStream, {}) != AZ::Data::AssetHandler::LoadResult::LoadComplete)
-        {
-            AZ_Warning(s_scriptCanvasBuilder, false, "CreateJobs for \"%s\" failed because the asset data could not be loaded from the file", fullPath.data());
-            return;
-        }
+        const ScriptCanvasEditor::Graph* sourceGraph = nullptr;
+        const ScriptCanvas::GraphData* graphData = nullptr;
 
-        auto* scriptCanvasEntity = asset.Get()->GetScriptCanvasEntity();
-        auto* sourceGraph = AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvasEditor::Graph>(scriptCanvasEntity);
+        ScriptCanvasEditor::SourceHandle sourceHandle;
+
+        auto sourceOutcome = ScriptCanvasEditor::LoadFromFile(fullPath);
+        if (sourceOutcome.IsSuccess())
+        {
+            sourceHandle = sourceOutcome.TakeValue();
+            sourceGraph = sourceHandle.Get();
+            graphData = sourceGraph->GetGraphDataConst();
+        }
+        
         AZ_Assert(sourceGraph, "Graph component is missing from entity.");
-        AZ_Assert(sourceGraph->GetGraphData(), "GraphData is missing from entity");
+        AZ_Assert(graphData, "GraphData is missing from entity");
 
         struct EntityIdComparer
         {
@@ -102,7 +71,7 @@ namespace ScriptCanvasBuilder
                 return lhsEntityId < rhsEntityId;
             }
         };
-        const AZStd::set<AZ::Entity*, EntityIdComparer> sortedEntities(sourceGraph->GetGraphData()->m_nodes.begin(), sourceGraph->GetGraphData()->m_nodes.end());
+        const AZStd::set<AZ::Entity*, EntityIdComparer> sortedEntities(graphData->m_nodes.begin(), graphData->m_nodes.end());
 
         size_t fingerprint = 0;
         for (const auto& nodeEntity : sortedEntities)
@@ -155,7 +124,7 @@ namespace ScriptCanvasBuilder
         };
 
         AZ_Verify(serializeContext->EnumerateInstanceConst
-            ( sourceGraph->GetGraphData()
+            ( graphData
             , azrtti_typeid<ScriptCanvas::GraphData>()
             , assetFilter
             , {}
@@ -168,17 +137,6 @@ namespace ScriptCanvasBuilder
 
         for (const AssetBuilderSDK::PlatformInfo& info : request.m_enabledPlatforms)
         {
-            if (info.HasTag("tools"))
-            {
-                AssetBuilderSDK::JobDescriptor copyDescriptor;
-                copyDescriptor.m_priority = 2;
-                copyDescriptor.m_critical = true;
-                copyDescriptor.m_jobKey = s_scriptCanvasCopyJobKey;
-                copyDescriptor.SetPlatformIdentifier(info.m_identifier.c_str());
-                copyDescriptor.m_additionalFingerprintInfo = AZStd::string(GetFingerprintString()).append("|").append(AZStd::to_string(static_cast<AZ::u64>(fingerprint)));
-                response.m_createJobOutputs.push_back(copyDescriptor);
-            }
-
             AssetBuilderSDK::JobDescriptor jobDescriptor;
             jobDescriptor.m_priority = 2;
             jobDescriptor.m_critical = true;
@@ -244,49 +202,14 @@ namespace ScriptCanvasBuilder
             return;
         }
 
-        if (!m_editorAssetHandler)
-        {
-            AZ_Error(s_scriptCanvasBuilder, false, R"(Exporting of .scriptcanvas for "%s" file failed as no editor asset handler was registered for script canvas. The ScriptCanvas Gem might not be enabled.)", fullPath.data());
-            return;
-        }
-
         if (!m_runtimeAssetHandler)
         {
             AZ_Error(s_scriptCanvasBuilder, false, R"(Exporting of .scriptcanvas for "%s" file failed as no runtime asset handler was registered for script canvas.)", fullPath.data());
             return;
         }
 
-        AZStd::shared_ptr<AZ::Data::AssetDataStream> assetDataStream = AZStd::make_shared<AZ::Data::AssetDataStream>();
-
-        AZ::IO::FileIOStream stream(fullPath.c_str(), AZ::IO::OpenMode::ModeRead);
-        if (!AZ::IO::RetryOpenStream(stream))
-        {
-            AZ_Warning(s_scriptCanvasBuilder, false, "CreateJobs for \"%s\" failed because the source file could not be opened.", fullPath.data());
-            return;
-        }
-
-        // Read the asset into a memory buffer, then hand ownership of the buffer to assetDataStream
-        {
-            AZ::IO::FileIOStream ioStream;
-            if (!ioStream.Open(fullPath.data(), AZ::IO::OpenMode::ModeRead))
-            {
-                AZ_Warning(s_scriptCanvasBuilder, false, "CreateJobs for \"%s\" failed because the source file could not be opened.", fullPath.data());
-                return;
-            }
-            AZStd::vector<AZ::u8> fileBuffer(ioStream.GetLength());
-            size_t bytesRead = ioStream.Read(fileBuffer.size(), fileBuffer.data());
-            if (bytesRead != ioStream.GetLength())
-            {
-                AZ_Warning(s_scriptCanvasBuilder, false, AZStd::string::format("File failed to read completely: %s", fullPath.data()).c_str());
-                return;
-            }
-
-            assetDataStream->Open(AZStd::move(fileBuffer));
-        }
-
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> asset;
-        asset.Create(request.m_sourceFileUUID);
-        if (m_editorAssetHandler->LoadAssetDataFromStream(asset, assetDataStream, nullptr) != AZ::Data::AssetHandler::LoadResult::LoadComplete)
+        auto loadOutcome = ScriptCanvasEditor::LoadFromFile(request.m_fullPath);
+        if (!loadOutcome.IsSuccess())
         {
             AZ_Error(s_scriptCanvasBuilder, false, R"(Loading of ScriptCanvas asset for source file "%s" has failed)", fullPath.data());
             return;
@@ -299,23 +222,11 @@ namespace ScriptCanvasBuilder
         AzFramework::StringFunc::Path::Join(request.m_tempDirPath.c_str(), fileNameOnly.c_str(), runtimeScriptCanvasOutputPath, true, true);
         AzFramework::StringFunc::Path::ReplaceExtension(runtimeScriptCanvasOutputPath, ScriptCanvas::RuntimeAsset::GetFileExtension());
 
-        if (request.m_jobDescription.m_jobKey == s_scriptCanvasCopyJobKey)
-        {
-            // ScriptCanvas Editor Asset Copy job
-            // The SubID is zero as this represents the main asset
-            AssetBuilderSDK::JobProduct jobProduct;
-            jobProduct.m_productFileName = fullPath;
-            jobProduct.m_productAssetType = azrtti_typeid<ScriptCanvasEditor::ScriptCanvasAsset>();
-            jobProduct.m_productSubID = 0;
-            jobProduct.m_dependenciesHandled = true;
-            jobProduct.m_dependencies.clear();
-            response.m_outputProducts.push_back(AZStd::move(jobProduct));
-            response.m_resultCode = AssetBuilderSDK::ProcessJobResult_Success;
-        }
-        else
-        {
-            AZ::Entity* buildEntity = asset.Get()->GetScriptCanvasEntity();
+        auto sourceHandle = loadOutcome.TakeValue();
 
+        if (request.m_jobDescription.m_jobKey == s_scriptCanvasProcessJobKey)
+        {
+            AZ::Entity* buildEntity = sourceHandle.Get()->GetEntity();
             ProcessTranslationJobInput input;
             input.assetID = AZ::Data::AssetId(request.m_sourceFileUUID, AZ_CRC("RuntimeData", 0x163310ae));
             input.request = &request;

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilderWorker.h

@@ -37,12 +37,12 @@ namespace ScriptCanvasEditor
 {
     class Graph;
     class ScriptCanvasAsset;
+    class SourceHandle;
 }
 
 namespace ScriptCanvasBuilder
 {
     constexpr const char* s_scriptCanvasBuilder = "ScriptCanvasBuilder";
-    constexpr const char* s_scriptCanvasCopyJobKey = "Script Canvas Copy Job";
     constexpr const char* s_scriptCanvasProcessJobKey = "Script Canvas Process Job";
     constexpr const char* s_unitTestParseErrorPrefix = "LY_SC_UnitTest";
 
@@ -59,6 +59,8 @@ namespace ScriptCanvasBuilder
         PrefabIntegration,
         CorrectGraphVariableVersion,
         ReflectEntityIdNodes,
+        FixExecutionStateNodeableConstruction,
+
         // add new entries above
         Current,
     };
@@ -69,7 +71,6 @@ namespace ScriptCanvasBuilder
 
     struct AssetHandlers
     {
-        AZ::Data::AssetHandler* m_editorAssetHandler = nullptr;
         AZ::Data::AssetHandler* m_editorFunctionAssetHandler = nullptr;
         AZ::Data::AssetHandler* m_runtimeAssetHandler = nullptr;
         AZ::Data::AssetHandler* m_subgraphInterfaceHandler = nullptr;
@@ -80,7 +81,6 @@ namespace ScriptCanvasBuilder
 
     struct SharedHandlers
     {
-        HandlerOwnership m_editorAssetHandler{};
         HandlerOwnership m_editorFunctionAssetHandler{};
         HandlerOwnership m_runtimeAssetHandler{};
         HandlerOwnership m_subgraphInterfaceHandler{};
@@ -122,13 +122,13 @@ namespace ScriptCanvasBuilder
         }
     };
 
-    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& asset);
+    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const ScriptCanvasEditor::SourceHandle& asset);
 
     AZ::Outcome<ScriptCanvas::GraphData, AZStd::string> CompileGraphData(AZ::Entity* scriptCanvasEntity);
 
     AZ::Outcome<ScriptCanvas::VariableData, AZStd::string> CompileVariableData(AZ::Entity* scriptCanvasEntity);
 
-    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(AZ::Entity* buildEntity, AZ::Data::AssetId scriptAssetId, AZStd::string_view rawLuaFilePath);
+    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const ScriptCanvasEditor::SourceHandle& editAsset, AZStd::string_view rawLuaFilePath);
 
     int GetBuilderVersion();
 
@@ -169,7 +169,6 @@ namespace ScriptCanvasBuilder
         void ShutDown() override {};
 
     private:
-        AZ::Data::AssetHandler* m_editorAssetHandler = nullptr;
         AZ::Data::AssetHandler* m_runtimeAssetHandler = nullptr;
         AZ::Data::AssetHandler* m_subgraphInterfaceHandler = nullptr;
 

Gems/ScriptCanvas/Code/Builder/ScriptCanvasBuilderWorkerUtility.cpp

@@ -29,19 +29,20 @@
 #include <ScriptCanvas/Results/ErrorText.h>
 #include <ScriptCanvas/Utils/BehaviorContextUtils.h>
 #include <Source/Components/SceneComponent.h>
+#include <ScriptCanvas/Core/Core.h>
+#include <AzCore/Asset/AssetManagerBus.h>
+
 
 namespace ScriptCanvasBuilder
 {
     AssetHandlers::AssetHandlers(SharedHandlers& source)
-        : m_editorAssetHandler(source.m_editorAssetHandler.first)
-        , m_editorFunctionAssetHandler(source.m_editorFunctionAssetHandler.first)
+        : m_editorFunctionAssetHandler(source.m_editorFunctionAssetHandler.first)
         , m_runtimeAssetHandler(source.m_runtimeAssetHandler.first)
         , m_subgraphInterfaceHandler(source.m_subgraphInterfaceHandler.first)
     {}
 
     void SharedHandlers::DeleteOwnedHandlers()
     {
-        DeleteIfOwned(m_editorAssetHandler);
         DeleteIfOwned(m_editorFunctionAssetHandler);
         DeleteIfOwned(m_runtimeAssetHandler);
         DeleteIfOwned(m_subgraphInterfaceHandler);
@@ -77,36 +78,23 @@ namespace ScriptCanvasBuilder
         return ScriptCanvas::Translation::ParseGraph(request);
     }
 
-    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(AZ::Entity* buildEntity, AZ::Data::AssetId scriptAssetId, AZStd::string_view rawLuaFilePath)
+    AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> CreateLuaAsset(const ScriptCanvasEditor::SourceHandle& editAsset, AZStd::string_view rawLuaFilePath)
     {
         AZStd::string fullPath(rawLuaFilePath);
         AZStd::string fileNameOnly;
         AzFramework::StringFunc::Path::GetFullFileName(rawLuaFilePath.data(), fileNameOnly);
         AzFramework::StringFunc::Path::Normalize(fullPath);
 
-        auto sourceGraph = PrepareSourceGraph(buildEntity);
+        auto sourceGraph = PrepareSourceGraph(editAsset.Mod()->GetEntity());
 
         ScriptCanvas::Grammar::Request request;
-        request.scriptAssetId = scriptAssetId;
+        request.scriptAssetId = editAsset.Id();
         request.graph = sourceGraph;
         request.name = fileNameOnly;
         request.rawSaveDebugOutput = ScriptCanvas::Grammar::g_saveRawTranslationOuputToFile;
         request.printModelToConsole = ScriptCanvas::Grammar::g_printAbstractCodeModel;
         request.path = fullPath;
 
-        bool pathFound = false;
-        AZStd::string relativePath;
-        AzToolsFramework::AssetSystemRequestBus::BroadcastResult
-            ( pathFound
-            , &AzToolsFramework::AssetSystem::AssetSystemRequest::GetRelativeProductPathFromFullSourceOrProductPath
-            , fullPath.c_str(), relativePath);
-
-        if (!pathFound)
-        {
-            AZ::Failure(AZStd::string::format("Failed to get engine relative path from %s", fullPath.c_str()));
-        }
-
-        request.namespacePath = relativePath;
         const ScriptCanvas::Translation::Result translationResult = TranslateToLua(request);
 
         auto isSuccessOutcome = translationResult.IsSuccess(ScriptCanvas::Translation::TargetFlags::Lua);
@@ -117,7 +105,7 @@ namespace ScriptCanvasBuilder
 
         auto& translation = translationResult.m_translations.find(ScriptCanvas::Translation::TargetFlags::Lua)->second;
         AZ::Data::Asset<AZ::ScriptAsset> asset;
-        scriptAssetId.m_subId = AZ::ScriptAsset::CompiledAssetSubId;
+        AZ::Data::AssetId scriptAssetId(editAsset.Id(), AZ::ScriptAsset::CompiledAssetSubId);
         asset.Create(scriptAssetId);
         auto writeStream = asset.Get()->CreateWriteStream();
 
@@ -144,12 +132,12 @@ namespace ScriptCanvasBuilder
         return AZ::Success(result);
     }
 
-    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>& editAsset)
+    AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> CreateRuntimeAsset(const ScriptCanvasEditor::SourceHandle& editAsset)
     {
         // Flush asset manager events to ensure no asset references are held by closures queued on Ebuses.
         AZ::Data::AssetManager::Instance().DispatchEvents();
 
-        auto runtimeAssetId = editAsset.GetId();
+        AZ::Data::AssetId runtimeAssetId = editAsset.Id();
         runtimeAssetId.m_subId = AZ_CRC("RuntimeData", 0x163310ae);
         AZ::Data::Asset<ScriptCanvas::RuntimeAsset> runtimeAsset;
         runtimeAsset.Create(runtimeAssetId);

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetHandler.cpp

@@ -23,6 +23,7 @@
 #include <ScriptCanvas/Asset/RuntimeAsset.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAsset.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAssetHandler.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 #include <ScriptCanvas/Bus/ScriptCanvasBus.h>
 #include <ScriptCanvas/Components/EditorGraph.h>
 #include <ScriptCanvas/Components/EditorGraphVariableManagerComponent.h>
@@ -93,49 +94,6 @@ namespace ScriptCanvasEditor
         }
     }
 
-    AZ::Outcome<void, AZStd::string> LoadScriptCanvasDataFromJson
-        ( ScriptCanvas::ScriptCanvasData& dataTarget
-        , AZStd::string_view source
-        , AZ::SerializeContext& serializeContext)
-    {
-        namespace JSRU = AZ::JsonSerializationUtils;
-        using namespace ScriptCanvas;
-
-        AZ::JsonDeserializerSettings settings;
-        settings.m_serializeContext = &serializeContext;
-        settings.m_metadata.Create<SerializationListeners>();
-
-        auto loadResult = JSRU::LoadObjectFromStringByType
-            ( &dataTarget
-            , azrtti_typeid<ScriptCanvasData>()
-            , source
-            , &settings);
-
-        if (!loadResult.IsSuccess())
-        {
-            return loadResult;
-        }
-                    
-        if (auto graphData = dataTarget.ModGraph())
-        {
-            auto listeners = settings.m_metadata.Find<SerializationListeners>();
-            AZ_Assert(listeners, "Failed to find SerializationListeners");
-
-            ScriptCanvasAssetHandlerCpp::CollectNodes(graphData->GetGraphData()->m_nodes, *listeners);
-
-            for (auto listener : *listeners)
-            {
-                listener->OnDeserialize();
-            }
-        }
-        else
-        {
-            return AZ::Failure(AZStd::string("Failed to find graph data after loading source"));
-        }
-
-        return AZ::Success();
-    }
-
     AZ::Data::AssetHandler::LoadResult ScriptCanvasAssetHandler::LoadAssetData
         ( const AZ::Data::Asset<AZ::Data::AssetData>& assetTarget
         , AZStd::shared_ptr<AZ::Data::AssetDataStream> streamSource
@@ -167,7 +125,7 @@ namespace ScriptCanvasEditor
                 settings.m_serializeContext = m_serializeContext;
                 settings.m_metadata.Create<SerializationListeners>();
                 // attempt JSON deserialization...
-                auto jsonResult = LoadScriptCanvasDataFromJson
+                auto jsonResult = LoadDataFromJson
                     ( scriptCanvasDataTarget
                     , AZStd::string_view{ byteBuffer.begin(), byteBuffer.size() }
                     , *m_serializeContext);
@@ -228,6 +186,7 @@ namespace ScriptCanvasEditor
         , AZ::IO::GenericStream* stream
         , [[maybe_unused]] AZ::DataStream::StreamType streamType)
     {
+        // #sc_editor_asset delete usage of this, and route to ScriptCanvasEditor::SaveToStream
         namespace JSRU = AZ::JsonSerializationUtils;
         using namespace ScriptCanvas;
 

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetHolder.cpp

@@ -82,30 +82,6 @@ namespace ScriptCanvasEditor
 
     void ScriptCanvasAssetHolder::OpenEditor() const
     {
-        AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
-
-        AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
-
-        if (m_scriptCanvasAsset.IsReady())
-        {
-            GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, m_scriptCanvasAsset.GetId(), -1);
-
-            if (!openOutcome)
-            {
-                AZ_Warning("Script Canvas", openOutcome, "%s", openOutcome.GetError().data());
-            }
-        }
-        else if (m_ownerId.first.IsValid())
-        {
-            AzToolsFramework::EntityIdList selectedEntityIds;
-            AzToolsFramework::ToolsApplicationRequestBus::BroadcastResult(selectedEntityIds, &AzToolsFramework::ToolsApplicationRequests::GetSelectedEntities);
-
-            // Going to bypass the multiple selected entities flow for right now.
-            if (selectedEntityIds.size() == 1)
-            {
-                GeneralRequestBus::Broadcast(&GeneralRequests::CreateScriptCanvasAssetFor, m_ownerId);
-            }
-        }
     }
 
     ScriptCanvas::ScriptCanvasId ScriptCanvasAssetHolder::GetScriptCanvasId() const

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetTracker.cpp

@@ -58,111 +58,8 @@ namespace ScriptCanvasEditor
         SaveAs(assetId, {}, onSaveCallback);
     }
 
-    void AssetTracker::SaveAs(AZ::Data::AssetId assetId, const AZStd::string& path, Callbacks::OnSave onSaveCallback)
+    void AssetTracker::SaveAs(AZ::Data::AssetId /*assetId*/, const AZStd::string& /*path*/, Callbacks::OnSave /*onSaveCallback*/)
     {
-        auto assetIter = m_assetsInUse.find(assetId);
-
-        if (assetIter != m_assetsInUse.end())
-        {
-            auto onSave = [this, assetId, onSaveCallback](bool saveSuccess, AZ::Data::AssetPtr asset, AZ::Data::AssetId previousFileAssetId)
-            {
-                AZ::Data::AssetId signalId = assetId;
-                AZ::Data::AssetId fileAssetId = asset->GetId();
-
-                // If there is a previous file Id is valid, it means this is a save-as operation and we need to remap the tracking.
-                if (previousFileAssetId.IsValid())
-                {
-                    if (saveSuccess)
-                    {
-                        fileAssetId = m_assetsInUse[assetId]->GetFileAssetId();
-                        m_remappedAsset[asset->GetId()] = fileAssetId;
-
-                        // Erase the asset first so the smart pointer can deal with it's things.
-                        m_assetsInUse.erase(fileAssetId);
-
-                        // Then perform the insert once we know nothing will attempt to delete this while we are operating on it.
-                        m_assetsInUse[fileAssetId] = m_assetsInUse[assetId];
-                        m_assetsInUse.erase(assetId);
-                    }
-
-                    m_savingAssets.erase(assetId);
-                    m_savingAssets.insert(fileAssetId);
-
-                    signalId = fileAssetId;
-
-                    if (m_queuedCloses.erase(assetId))
-                    {
-                        m_queuedCloses.insert(fileAssetId);
-                    }
-                    
-                    auto assetIter = m_assetsInUse.find(fileAssetId);
-
-                    if (assetIter != m_assetsInUse.end())
-                    {
-                        AZStd::invoke(onSaveCallback, saveSuccess, m_assetsInUse[fileAssetId]->GetAsset().Get(), previousFileAssetId);
-                    }
-                    else
-                    {
-                        AZ_Error("ScriptCanvas", !saveSuccess, "Unable to find Memory Asset for Asset(%s)", fileAssetId.ToString<AZStd::string>().c_str());
-                        AZStd::invoke(onSaveCallback, saveSuccess, asset, previousFileAssetId);
-                    }
-                }
-                else
-                {
-                    if (saveSuccess)
-                    {
-                        // This should be the case when we get a save as from a newly created file.
-                        //
-                        // If we find the 'memory' asset id in the assets in use. This means this was a new file that was saved.
-                        // To maintain all of the look-up stuff, we need to treat this like a remapping stage.
-                        auto assetInUseIter = m_assetsInUse.find(assetId);
-                        if (assetInUseIter != m_assetsInUse.end())
-                        {
-                            fileAssetId = assetInUseIter->second->GetFileAssetId();
-
-                            if (assetId != fileAssetId)
-                            {
-                                m_remappedAsset[assetId] = fileAssetId;
-
-                                m_assetsInUse.erase(fileAssetId);
-                                m_assetsInUse[fileAssetId] = AZStd::move(assetInUseIter->second);
-                                m_assetsInUse.erase(assetId);
-
-                                m_savingAssets.erase(assetId);
-                                m_savingAssets.insert(fileAssetId);
-
-                                if (m_queuedCloses.erase(assetId))
-                                {
-                                    m_queuedCloses.insert(fileAssetId);
-                                }
-                            }
-                        }
-                        else
-                        {
-                            fileAssetId = CheckAssetId(fileAssetId);
-                        }
-
-                        signalId = fileAssetId;
-                    }
-
-                    if (onSaveCallback)
-                    {
-                        AZStd::invoke(onSaveCallback, saveSuccess, m_assetsInUse[signalId]->GetAsset().Get(), previousFileAssetId);
-                    }
-
-                    AssetTrackerNotificationBus::Broadcast(&AssetTrackerNotifications::OnAssetSaved, m_assetsInUse[signalId], saveSuccess);
-                }
-
-                SignalSaveComplete(signalId);
-            };
-
-            m_savingAssets.insert(assetId);
-            assetIter->second->SaveAs(path, onSave);
-        }
-        else
-        {
-            AZ_Assert(false, "Cannot SaveAs into an existing AssetId");
-        }
     }
 
     bool AssetTracker::Load(AZ::Data::AssetId fileAssetId, AZ::Data::AssetType assetType, Callbacks::OnAssetReadyCallback onAssetReadyCallback)
@@ -541,48 +438,4 @@ namespace ScriptCanvasEditor
         return AZ::EntityId();
     }
 
-    void AssetTracker::OnAssetReady(const ScriptCanvasMemoryAsset* asset)
-    {
-        AZ::Data::AssetId assetId = CheckAssetId(asset->GetId());
-
-        auto assetInUseIter = m_assetsInUse.find(assetId);
-        if (assetInUseIter != m_assetsInUse.end())
-        {
-            AssetTrackerNotificationBus::Broadcast(&AssetTrackerNotifications::OnAssetReady, assetInUseIter->second);
-        }
-    }
-
-    void AssetTracker::OnAssetReloaded(const ScriptCanvasMemoryAsset* asset)
-    {
-        AZ::Data::AssetId assetId = CheckAssetId(asset->GetId());
-
-        auto assetInUseIter = m_assetsInUse.find(assetId);
-        if (assetInUseIter != m_assetsInUse.end())
-        {
-            AssetTrackerNotificationBus::Broadcast(&AssetTrackerNotifications::OnAssetReloaded, assetInUseIter->second);
-        }
-    }
-
-    void AssetTracker::OnAssetSaved(const ScriptCanvasMemoryAsset* asset, bool isSuccessful)
-    {
-        AZ::Data::AssetId assetId = CheckAssetId(asset->GetId());
-
-        auto assetInUseIter = m_assetsInUse.find(assetId);
-        if (assetInUseIter != m_assetsInUse.end())
-        {
-            AssetTrackerNotificationBus::Broadcast(&AssetTrackerNotifications::OnAssetSaved, assetInUseIter->second, isSuccessful);
-        }
-    }
-
-    void AssetTracker::OnAssetError(const ScriptCanvasMemoryAsset* asset)
-    {
-        AZ::Data::AssetId assetId = CheckAssetId(asset->GetId());
-
-        auto assetInUseIter = m_assetsInUse.find(assetId);
-        if (assetInUseIter != m_assetsInUse.end())
-        {
-            AssetTrackerNotificationBus::Broadcast(&AssetTrackerNotifications::OnAssetError, assetInUseIter->second);
-        }
-    }
-
 }

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetTracker.h

@@ -16,6 +16,7 @@
 #include <Editor/Assets/ScriptCanvasAssetTrackerBus.h>
 
 #include <GraphCanvas/Editor/EditorTypes.h>
+#include <ScriptCanvas/Bus/RequestBus.h>
 
 
 namespace ScriptCanvasEditor
@@ -119,10 +120,5 @@ namespace ScriptCanvasEditor
         // Invoked when an asset is loaded from file and becomes ready
         Callbacks::OnAssetReadyCallback m_onAssetReadyCallback;
 
-        // Internal::MemoryAssetNotificationBus
-        void OnAssetReady(const ScriptCanvasMemoryAsset* asset) override;
-        void OnAssetReloaded(const ScriptCanvasMemoryAsset* asset) override;
-        void OnAssetSaved(const ScriptCanvasMemoryAsset* asset, bool isSuccessful) override;
-        void OnAssetError(const ScriptCanvasMemoryAsset* asset) override;
     };
 }

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetTrackerBus.h

@@ -17,6 +17,7 @@
 
 #include <Editor/Assets/ScriptCanvasAssetTrackerDefinitions.h>
 #include <Editor/Assets/ScriptCanvasMemoryAsset.h>
+#include <ScriptCanvas/Bus/RequestBus.h>
 
 class QWidget;
 
@@ -154,17 +155,5 @@ namespace ScriptCanvasEditor
         using MemoryAssetSystemNotificationBus = AZ::EBus<MemoryAssetSystemNotifications>;
     }
     
-    class MemoryAssetNotifications
-        : public AZ::EBusTraits
-    {
-    public:
-        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Multiple;
-        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
-        using BusIdType = AZ::Data::AssetId;
-
-        virtual void OnFileStateChanged(Tracker::ScriptCanvasFileState) {}
-    };
-
-    using MemoryAssetNotificationBus = AZ::EBus<MemoryAssetNotifications>;
     //////////////////////////////////////////////////////////////////////////////////////////////////////////
 }

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasAssetTrackerDefinitions.h

@@ -18,22 +18,11 @@ namespace ScriptCanvasEditor
     namespace Callbacks
     {
         //! Callback used to know when a save operation failed or succeeded
-        using OnSave = AZStd::function<void(bool saveSuccess, AZ::Data::AssetPtr, AZ::Data::AssetId previousFileAssetId)>;
+        using OnSave = AZStd::function<void(bool saveSuccess, const SourceHandle& attempt, const SourceHandle& previous)>;
 
         using OnAssetReadyCallback = AZStd::function<void(ScriptCanvasMemoryAsset&)>;
         using OnAssetCreatedCallback = OnAssetReadyCallback;
     }
 
-    namespace Tracker
-    {
-        enum class ScriptCanvasFileState : AZ::s32
-        {
-            NEW,
-            MODIFIED,
-            UNMODIFIED,
-            SOURCE_REMOVED,
-            INVALID = -1
-        };
-    }
 
 }

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasFileHandling.cpp

@@ -0,0 +1,329 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzCore/Component/ComponentApplicationBus.h>
+#include <AzCore/IO/FileIO.h>
+#include <AzCore/IO/GenericStreams.h>
+#include <AzCore/Serialization/Json/JsonSerialization.h>
+#include <AzCore/Serialization/Json/JsonSerializationResult.h>
+#include <AzCore/Serialization/Json/JsonUtils.h>
+#include <AzCore/Serialization/SerializeContext.h>
+#include <AzCore/Serialization/Utils.h>
+#include <AzCore/Utils/Utils.h>
+#include <AzCore/std/string/string_view.h>
+#include <AzFramework/StringFunc/StringFunc.h>
+#include <AzToolsFramework/API/EditorAssetSystemAPI.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
+#include <ScriptCanvas/Bus/ScriptCanvasBus.h>
+#include <ScriptCanvas/Components/EditorGraph.h>
+#include <ScriptCanvas/Core/SerializationListener.h>
+#include <ScriptCanvas/Asset/RuntimeAsset.h>
+#include <ScriptCanvas/Libraries/Math/MathNodeUtilities.h>
+
+namespace ScriptCanvasFileHandlingCpp
+{
+    void AppendTabs(AZStd::string& result, size_t depth)
+    {
+        for (size_t i = 0; i < depth; ++i)
+        {
+            result += "\t";
+        }
+    }
+
+    void CollectNodes(const ScriptCanvas::GraphData::NodeContainer& container, ScriptCanvas::SerializationListeners& listeners)
+    {
+        for (auto& nodeEntity : container)
+        {
+            if (nodeEntity)
+            {
+                if (auto listener = azrtti_cast<ScriptCanvas::SerializationListener*>
+                    ( AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Node>(nodeEntity)))
+                {
+                    listeners.push_back(listener);
+                }
+            }
+        }
+    }
+}
+
+namespace ScriptCanvasEditor
+{
+    EditorAssetTree* EditorAssetTree::ModRoot()
+    {
+        if (!m_parent)
+        {
+            return this;
+        }
+
+        return m_parent->ModRoot();
+    }
+
+    void EditorAssetTree::SetParent(EditorAssetTree& parent)
+    {
+        m_parent = &parent;
+    }
+
+    AZStd::string EditorAssetTree::ToString(size_t depth) const
+    {
+        AZStd::string result;
+        ScriptCanvasFileHandlingCpp::AppendTabs(result, depth);
+        result += m_asset.ToString();
+        depth += m_dependencies.empty() ? 0 : 1;
+
+        for (const auto& dependency : m_dependencies)
+        {
+            result += "\n";
+            ScriptCanvasFileHandlingCpp::AppendTabs(result, depth);
+            result += dependency.ToString(depth);
+        }
+
+        return result;
+    }
+
+    AZ::Outcome<void, AZStd::string> LoadDataFromJson
+        ( ScriptCanvas::ScriptCanvasData& dataTarget
+        , AZStd::string_view source
+        , AZ::SerializeContext& serializeContext)
+    {
+        namespace JSRU = AZ::JsonSerializationUtils;
+        using namespace ScriptCanvas;
+
+        AZ::JsonDeserializerSettings settings;
+        settings.m_serializeContext = &serializeContext;
+        settings.m_metadata.Create<SerializationListeners>();
+
+        auto loadResult = JSRU::LoadObjectFromStringByType
+            ( &dataTarget
+            , azrtti_typeid<ScriptCanvasData>()
+            , source
+            , &settings);
+
+        if (!loadResult.IsSuccess())
+        {
+            return loadResult;
+        }
+                    
+        if (auto graphData = dataTarget.ModGraph())
+        {
+            auto listeners = settings.m_metadata.Find<SerializationListeners>();
+            AZ_Assert(listeners, "Failed to find SerializationListeners");
+
+            ScriptCanvasFileHandlingCpp::CollectNodes(graphData->GetGraphData()->m_nodes, *listeners);
+
+            for (auto listener : *listeners)
+            {
+                listener->OnDeserialize();
+            }
+        }
+        else
+        {
+            return AZ::Failure(AZStd::string("Failed to find graph data after loading source"));
+        }
+
+        return AZ::Success();
+    }
+
+
+    AZ::Outcome<EditorAssetTree, AZStd::string> LoadEditorAssetTree(SourceHandle handle, EditorAssetTree* parent)
+    {
+        if (!CompleteDescriptionInPlace(handle))
+        {
+            return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to describe graph from %s", handle.ToString().c_str()));
+        }
+
+        if (!handle.Get())
+        {
+            auto loadAssetOutcome = LoadFromFile(handle.Path().c_str());
+            if (!loadAssetOutcome.IsSuccess())
+            {
+                return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to load graph from %s: %s"
+                    , handle.ToString().c_str(), loadAssetOutcome.GetError().c_str()));
+            }
+
+            handle = SourceHandle(loadAssetOutcome.GetValue(), handle.Id(), handle.Path().c_str());
+        }
+
+        AZStd::vector<SourceHandle> dependentAssets;
+        const auto subgraphInterfaceAssetTypeID = azrtti_typeid<AZ::Data::Asset<ScriptCanvas::SubgraphInterfaceAsset>>();
+        
+        auto beginElementCB = [&subgraphInterfaceAssetTypeID, &dependentAssets]
+            ( void* instance
+            , const AZ::SerializeContext::ClassData* classData
+            , const AZ::SerializeContext::ClassElement* classElement) -> bool
+        {
+            if (classElement)
+            {
+                // if we are a pointer, then we may be pointing to a derived type.
+                if (classElement->m_flags & AZ::SerializeContext::ClassElement::FLG_POINTER)
+                {
+                    // if ptr is a pointer-to-pointer, cast its value to a void* (or const void*) and dereference to get to the actual object pointer.
+                    instance = *(void**)(instance);
+                }
+            }
+
+            if (classData->m_typeId == subgraphInterfaceAssetTypeID)
+            {
+                auto asset = reinterpret_cast<AZ::Data::Asset<ScriptCanvas::SubgraphInterfaceAsset>*>(instance);
+                auto id = asset->GetId();
+                dependentAssets.push_back(SourceHandle(nullptr, id.m_guid, {}));
+            }
+
+            return true;
+        };
+
+        AZ::SerializeContext* serializeContext = nullptr;
+        AZ::ComponentApplicationBus::BroadcastResult(serializeContext, &AZ::ComponentApplicationRequests::GetSerializeContext);
+        AZ_Assert(serializeContext, "LoadEditorAssetTree() ailed to retrieve serialize context!");
+
+        const ScriptCanvasEditor::Graph* graph = handle.Get();
+        serializeContext->EnumerateObject(graph, beginElementCB, nullptr, AZ::SerializeContext::ENUM_ACCESS_FOR_READ);
+
+        EditorAssetTree result;
+
+        for (auto& dependentAsset : dependentAssets)
+        {
+            auto loadDependentOutcome = LoadEditorAssetTree(dependentAsset, &result);
+            if (!loadDependentOutcome.IsSuccess())
+            {
+                return AZ::Failure(AZStd::string::format("LoadEditorAssetTree failed to load graph from %s: %s"
+                    , dependentAsset.ToString().c_str(), loadDependentOutcome.GetError().c_str()));
+            }
+
+            result.m_dependencies.push_back(loadDependentOutcome.TakeValue());
+        }
+
+        if (parent)
+        {
+            result.SetParent(*parent);
+        }
+
+        result.m_asset = AZStd::move(handle);
+        return AZ::Success(result);
+    }
+
+    AZ::Outcome<ScriptCanvasEditor::SourceHandle, AZStd::string> LoadFromFile(AZStd::string_view path)
+    {
+        namespace JSRU = AZ::JsonSerializationUtils;
+
+        auto fileStringOutcome = AZ::Utils::ReadFile<AZStd::string>(path);
+        if (!fileStringOutcome)
+        {
+            return AZ::Failure(fileStringOutcome.TakeError());
+        }
+
+        const auto& asString = fileStringOutcome.GetValue();
+        ScriptCanvas::DataPtr scriptCanvasData = aznew ScriptCanvas::ScriptCanvasData();
+        if (!scriptCanvasData)
+        {
+            return AZ::Failure(AZStd::string("failed to allocate ScriptCanvas::ScriptCanvasData after loading source file"));
+        }
+        
+        AZ::SerializeContext* serializeContext = nullptr;
+        AZ::ComponentApplicationBus::BroadcastResult(serializeContext, &AZ::ComponentApplicationRequests::GetSerializeContext);
+        if (!serializeContext)
+        {
+            return AZ::Failure(AZStd::string("no serialize context available to properly parse source file"));
+        }
+
+        // attempt JSON deserialization...
+        auto jsonResult = LoadDataFromJson(*scriptCanvasData, AZStd::string_view{ asString.begin(), asString.size() }, *serializeContext);
+        if (!jsonResult.IsSuccess())
+        {
+            // ...try legacy xml as a failsafe
+            AZ::IO::ByteContainerStream byteStream(&asString);
+            if (!AZ::Utils::LoadObjectFromStreamInPlace
+                ( byteStream
+                , *scriptCanvasData
+                , serializeContext
+                , AZ::ObjectStream::FilterDescriptor(nullptr, AZ::ObjectStream::FILTERFLAG_IGNORE_UNKNOWN_CLASSES)))
+            {
+                return AZ::Failure(AZStd::string::format("XML and JSON load attempts failed: %s", jsonResult.GetError().c_str()));
+            }
+        }
+
+        if (auto entity = scriptCanvasData->GetScriptCanvasEntity())
+        {
+            AZ_Assert(entity->GetState() == AZ::Entity::State::Constructed, "Entity loaded in bad state");
+            AZ::u64 entityId =
+                aznumeric_caster(ScriptCanvas::MathNodeUtilities::GetRandomIntegral<AZ::s64>(1, std::numeric_limits<AZ::s64>::max()));
+            entity->SetId(AZ::EntityId(entityId));
+
+            auto graph = entity->FindComponent<ScriptCanvasEditor::Graph>();
+            graph->MarkOwnership(*scriptCanvasData);
+
+            entity->Init();
+            entity->Activate();
+        }
+        else
+        {
+            return AZ::Failure(AZStd::string("Loaded script canvas file was missing a necessary Entity."));
+        }
+
+        return AZ::Success(ScriptCanvasEditor::SourceHandle(scriptCanvasData, path));
+    }
+
+    AZ::Outcome<void, AZStd::string> SaveToStream(const SourceHandle& source, AZ::IO::GenericStream& stream)
+    {
+        namespace JSRU = AZ::JsonSerializationUtils;
+        
+        if (!source.IsGraphValid())
+        {
+            return AZ::Failure(AZStd::string("no source graph to save"));
+        }
+
+        if (source.Path().empty())
+        {
+            return AZ::Failure(AZStd::string("no destination path specified"));
+        }
+
+        AZ::SerializeContext* serializeContext = nullptr;
+        AZ::ComponentApplicationBus::BroadcastResult(serializeContext, &AZ::ComponentApplicationRequests::GetSerializeContext);
+        if (!serializeContext)
+        {
+            return AZ::Failure(AZStd::string("no serialize context available to properly save source file"));
+        }
+
+        auto graphData = source.Get()->GetOwnership();
+        if (!graphData)
+        {
+            return AZ::Failure(AZStd::string("source is missing save container"));
+        }
+        
+        if (graphData->GetEditorGraph() != source.Get())
+        {
+            return AZ::Failure(AZStd::string("source save container refers to incorrect graph"));
+        }
+
+        auto saveTarget = graphData->ModGraph();
+        if (!saveTarget || !saveTarget->GetGraphData())
+        {
+            return AZ::Failure(AZStd::string("source save container failed to return serializable graph data"));
+        }
+
+        AZ::JsonSerializerSettings settings;
+        settings.m_metadata.Create<ScriptCanvas::SerializationListeners>();
+        auto listeners = settings.m_metadata.Find<ScriptCanvas::SerializationListeners>();
+        AZ_Assert(listeners, "Failed to create SerializationListeners");
+        ScriptCanvasFileHandlingCpp::CollectNodes(saveTarget->GetGraphData()->m_nodes, *listeners);
+        settings.m_keepDefaults = false;
+        settings.m_serializeContext = serializeContext;
+
+        for (auto listener : *listeners)
+        {   
+            listener->OnSerialize();
+        }
+
+        auto saveOutcome = JSRU::SaveObjectToStream<ScriptCanvas::ScriptCanvasData>(graphData.get(), stream, nullptr, &settings);
+        if (!saveOutcome.IsSuccess())
+        {
+            return AZ::Failure(AZStd::string::format("JSON serialization failed to save source: %s", saveOutcome.GetError().c_str()));
+        }
+
+        return AZ::Success();
+    }
+}

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasMemoryAsset.cpp

@@ -19,8 +19,7 @@
 namespace ScriptCanvasEditor
 {
     ScriptCanvasMemoryAsset::ScriptCanvasMemoryAsset()
-        : m_isSaving(false)
-        , m_sourceInError(false)
+        : m_sourceInError(false)
     {
         m_undoState = AZStd::make_unique<SceneUndoState>(this);
     }
@@ -279,14 +278,11 @@ namespace ScriptCanvasEditor
 
         EditorGraphNotificationBus::Handler::BusDisconnect();
         EditorGraphNotificationBus::Handler::BusConnect(m_scriptCanvasId);
-
-        m_undoHelper = AZStd::make_unique<UndoHelper>(*this);
     }
 
-    ScriptCanvasEditor::Widget::CanvasWidget* ScriptCanvasMemoryAsset::CreateView(QWidget* parent)
+    ScriptCanvasEditor::Widget::CanvasWidget* ScriptCanvasMemoryAsset::CreateView(QWidget* /*parent*/)
     {
-        m_canvasWidget = new Widget::CanvasWidget(m_fileAssetId, parent);
-        return m_canvasWidget;
+        return nullptr;
     }
 
     void ScriptCanvasMemoryAsset::ClearView()
@@ -430,68 +426,13 @@ namespace ScriptCanvasEditor
         }
     }
 
-    void ScriptCanvasMemoryAsset::SourceFileFailed(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid)
+    void ScriptCanvasMemoryAsset::SourceFileFailed(AZStd::string /*relativePath*/, AZStd::string /*scanFolder*/, AZ::Uuid)
     {
-        AZStd::string fullPath;
-        AzFramework::StringFunc::Path::Join(scanFolder.data(), relativePath.data(), fullPath);
-        AzFramework::ApplicationRequests::Bus::Broadcast(&AzFramework::ApplicationRequests::NormalizePath, fullPath);
 
-        auto assetPathIdIt = AZStd::find(m_pendingSave.begin(), m_pendingSave.end(), fullPath);
-
-        if (assetPathIdIt != m_pendingSave.end())
-        {
-            if (m_onSaveCallback)
-            {
-                m_onSaveCallback(false, m_inMemoryAsset.Get(), AZ::Data::AssetId());
-                m_onSaveCallback = nullptr;
-            }
-
-            m_pendingSave.erase(assetPathIdIt);
-        }
     }
 
-    void ScriptCanvasMemoryAsset::SavingComplete(const AZStd::string& streamName, AZ::Uuid sourceAssetId)
+    void ScriptCanvasMemoryAsset::SavingComplete(const AZStd::string& /*streamName*/, AZ::Uuid /*sourceAssetId*/)
     {
-        AZStd::string normPath = streamName;
-        AzFramework::ApplicationRequests::Bus::Broadcast(&AzFramework::ApplicationRequests::NormalizePath, normPath);
-
-        auto assetPathIdIt = AZStd::find(m_pendingSave.begin(), m_pendingSave.end(), normPath);
-        if (assetPathIdIt != m_pendingSave.end())
-        {
-            AZ::Data::AssetId previousFileAssetId;
-
-            if (sourceAssetId != m_fileAssetId.m_guid)
-            {
-                previousFileAssetId = m_fileAssetId;
-
-                // The source file has changed, store the AssetId to the canonical asset on file
-                SetFileAssetId(sourceAssetId);
-
-            }
-            else if (!m_fileAssetId.IsValid())
-            {
-                SetFileAssetId(sourceAssetId);
-            }
-
-            m_formerGraphIdPair = AZStd::make_pair(m_scriptCanvasId, m_graphId);
-
-            m_fileState = Tracker::ScriptCanvasFileState::UNMODIFIED;
-
-            m_pendingSave.erase(assetPathIdIt);
-
-            m_absolutePath = m_saveAsPath;
-            m_saveAsPath.clear();
-
-            // Connect to the source asset's bus to monitor for situations we may need to handle
-            AZ::Data::AssetBus::MultiHandler::BusConnect(m_inMemoryAsset.GetId());
-            AZ::Data::AssetBus::MultiHandler::BusConnect(m_fileAssetId);
-
-            if (m_onSaveCallback)
-            {
-                m_onSaveCallback(true, m_inMemoryAsset.Get(), previousFileAssetId);
-                m_onSaveCallback = nullptr;
-            }
-        }
     }
 
     void ScriptCanvasMemoryAsset::FinalizeAssetSave(bool, const AzToolsFramework::SourceControlFileInfo& fileInfo, const AZ::Data::AssetStreamInfo& saveInfo, Callbacks::OnSave onSaveCallback)
@@ -525,19 +466,13 @@ namespace ScriptCanvasEditor
         UndoNotificationBus::Broadcast(&UndoNotifications::OnCanRedoChanged, m_undoState->m_undoStack->CanRedo());
     }
 
-    void ScriptCanvasMemoryAsset::SetFileAssetId(const AZ::Data::AssetId& fileAssetId)
+    void ScriptCanvasMemoryAsset::SetFileAssetId(const AZ::Data::AssetId& /*fileAssetId*/)
     {
-        m_fileAssetId = fileAssetId;
 
-        if (m_canvasWidget)
-        {
-            m_canvasWidget->SetAssetId(fileAssetId);
-        }
     }
 
     void ScriptCanvasMemoryAsset::SignalFileStateChanged()
     {
-        MemoryAssetNotificationBus::Event(m_fileAssetId, &MemoryAssetNotifications::OnFileStateChanged, GetFileState());
     }
 
     AZStd::string ScriptCanvasMemoryAsset::MakeTemporaryFilePathForSave(AZStd::string_view targetFilename)
@@ -604,27 +539,8 @@ namespace ScriptCanvasEditor
     // AssetSaveFinalizer
     //////////////////////////////////////
 
-    bool AssetSaveFinalizer::ValidateStatus(const AzToolsFramework::SourceControlFileInfo& fileInfo)
+    bool AssetSaveFinalizer::ValidateStatus(const AzToolsFramework::SourceControlFileInfo& /*fileInfo*/)
     {
-        auto fileIO = AZ::IO::FileIOBase::GetInstance();
-        if (fileInfo.IsLockedByOther())
-        {
-            AZ_Error("Script Canvas", !fileInfo.IsLockedByOther(), "The file is already exclusively opened by another user: %s", fileInfo.m_filePath.data());
-            AZStd::invoke(m_onSave, false, m_inMemoryAsset, m_fileAssetId);
-            return false;
-        }
-        else if (fileInfo.IsReadOnly() && fileIO->Exists(fileInfo.m_filePath.c_str()))
-        {
-            AZ_Error("Script Canvas", !fileInfo.IsReadOnly(), "File %s is read-only. It cannot be saved."
-                " If this file is in Perforce it may not have been checked out by the Source Control API.", fileInfo.m_filePath.data());
-            AZStd::invoke(m_onSave, false, m_inMemoryAsset, m_fileAssetId);
-            return false;
-        }
-        else if (m_saving)
-        {
-            AZ_Warning("Script Canvas", false, "Trying to save the same file twice. Will result in one save callback being ignored.");
-            return false;
-        }
         return true;
     }
 

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasMemoryAsset.h

@@ -29,6 +29,8 @@
 
 #include <Editor/View/Widgets/CanvasWidget.h>
 #include <Editor/Undo/ScriptCanvasUndoManager.h>
+#include <ScriptCanvas/Bus/RequestBus.h>
+
 
 namespace ScriptCanvasEditor
 {
@@ -172,7 +174,6 @@ namespace ScriptCanvasEditor
 
         bool IsSourceInError() const;
 
-        void OnSourceAssetFinalized(const AZStd::string& fullPath, AZ::Uuid sourceAssetId);
         void SavingComplete(const AZStd::string& fullPath, AZ::Uuid sourceAssetId);
 
         AZ::Data::AssetId GetSourceUuid() const { return m_sourceUuid; }
@@ -320,7 +321,6 @@ namespace ScriptCanvasEditor
         //! The undo helper is an object that implements the Undo behaviors
         AZStd::unique_ptr<UndoHelper> m_undoHelper;
 
-        bool m_isSaving;
         bool m_sourceInError;
 
         AZ::Data::AssetId m_sourceUuid;

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasUndoHelper.cpp

@@ -9,13 +9,19 @@
 #include "ScriptCanvasUndoHelper.h"
 #include "ScriptCanvasMemoryAsset.h"
 #include <Undo/ScriptCanvasGraphCommand.h>
+#include <ScriptCanvas/Components/EditorGraph.h>
 
 namespace ScriptCanvasEditor
 {
-    UndoHelper::UndoHelper(ScriptCanvasMemoryAsset& memoryAsset)
-        : m_memoryAsset(memoryAsset)
+    UndoHelper::UndoHelper()
+        : m_undoState(this)
     {
-        UndoRequestBus::Handler::BusConnect(memoryAsset.GetScriptCanvasId());
+    }
+
+    UndoHelper::UndoHelper(Graph* graph)
+        : m_undoState(this)
+    {
+        SetSource(graph);
     }
 
     UndoHelper::~UndoHelper()
@@ -23,15 +29,21 @@ namespace ScriptCanvasEditor
         UndoRequestBus::Handler::BusDisconnect();
     }
 
+    void UndoHelper::SetSource(Graph* graph)
+    {
+        m_graph = graph;
+        UndoRequestBus::Handler::BusConnect(graph->GetScriptCanvasId());
+    }
+
     ScriptCanvasEditor::UndoCache* UndoHelper::GetSceneUndoCache()
     {
-        return m_memoryAsset.GetUndoState()->m_undoCache.get();
+        return m_undoState.m_undoCache.get();
     }
 
     ScriptCanvasEditor::UndoData UndoHelper::CreateUndoData()
     {
-        AZ::EntityId graphCanvasGraphId = m_memoryAsset.GetGraphId();
-        ScriptCanvas::ScriptCanvasId scriptCanvasId = m_memoryAsset.GetScriptCanvasId();
+        AZ::EntityId graphCanvasGraphId = m_graph->GetGraphCanvasGraphId();
+        ScriptCanvas::ScriptCanvasId scriptCanvasId = m_graph->GetScriptCanvasId();
 
         GraphCanvas::GraphModelRequestBus::Event(graphCanvasGraphId, &GraphCanvas::GraphModelRequests::OnSaveDataDirtied, graphCanvasGraphId);
 
@@ -56,17 +68,17 @@ namespace ScriptCanvasEditor
 
     void UndoHelper::BeginUndoBatch(AZStd::string_view label)
     {
-        m_memoryAsset.GetUndoState()->BeginUndoBatch(label);
+        m_undoState.BeginUndoBatch(label);
     }
 
     void UndoHelper::EndUndoBatch()
     {
-        m_memoryAsset.GetUndoState()->EndUndoBatch();
+        m_undoState.EndUndoBatch();
     }
 
     void UndoHelper::AddUndo(AzToolsFramework::UndoSystem::URSequencePoint* sequencePoint)
     {
-        if (SceneUndoState* sceneUndoState = m_memoryAsset.GetUndoState())
+        if (SceneUndoState* sceneUndoState = &m_undoState)
         {
             if (!sceneUndoState->m_currentUndoBatch)
             {
@@ -82,22 +94,22 @@ namespace ScriptCanvasEditor
     void UndoHelper::AddGraphItemChangeUndo(AZStd::string_view undoLabel)
     {
         GraphItemChangeCommand* command = aznew GraphItemChangeCommand(undoLabel);
-        command->Capture(m_memoryAsset, true);
-        command->Capture(m_memoryAsset, false);
+        command->Capture(m_graph, true);
+        command->Capture(m_graph, false);
         AddUndo(command);
     }
 
     void UndoHelper::AddGraphItemAdditionUndo(AZStd::string_view undoLabel)
     {
         GraphItemAddCommand* command = aznew GraphItemAddCommand(undoLabel);
-        command->Capture(m_memoryAsset, false);
+        command->Capture(m_graph, false);
         AddUndo(command);
     }
 
     void UndoHelper::AddGraphItemRemovalUndo(AZStd::string_view undoLabel)
     {
         GraphItemRemovalCommand* command = aznew GraphItemRemovalCommand(undoLabel);
-        command->Capture(m_memoryAsset, true);
+        command->Capture(m_graph, true);
         AddUndo(command);
     }
 
@@ -105,7 +117,7 @@ namespace ScriptCanvasEditor
     {
         AZ_PROFILE_FUNCTION(ScriptCanvas);
 
-        SceneUndoState* sceneUndoState = m_memoryAsset.GetUndoState();
+        SceneUndoState* sceneUndoState = &m_undoState;
         if (sceneUndoState)
         {
             AZ_Warning("Script Canvas", !sceneUndoState->m_currentUndoBatch, "Script Canvas Editor has an open undo batch when performing a redo operation");
@@ -125,7 +137,7 @@ namespace ScriptCanvasEditor
     {
         AZ_PROFILE_FUNCTION(ScriptCanvas);
 
-        SceneUndoState* sceneUndoState = m_memoryAsset.GetUndoState();
+        SceneUndoState* sceneUndoState = &m_undoState;
         if (sceneUndoState)
         {
             AZ_Warning("Script Canvas", !sceneUndoState->m_currentUndoBatch, "Script Canvas Editor has an open undo batch when performing a redo operation");
@@ -143,7 +155,7 @@ namespace ScriptCanvasEditor
 
     void UndoHelper::Reset()
     {
-        if (SceneUndoState* sceneUndoState = m_memoryAsset.GetUndoState())
+        if (SceneUndoState* sceneUndoState = &m_undoState)
         {
             AZ_Warning("Script Canvas", !sceneUndoState->m_currentUndoBatch, "Script Canvas Editor has an open undo batch when resetting the undo stack");
             sceneUndoState->m_undoStack->Reset();
@@ -162,17 +174,23 @@ namespace ScriptCanvasEditor
 
     bool UndoHelper::CanUndo() const
     {
-        return m_memoryAsset.GetUndoState()->m_undoStack->CanUndo();
+        return m_undoState.m_undoStack->CanUndo();
     }
 
     bool UndoHelper::CanRedo() const
     {
-        return m_memoryAsset.GetUndoState()->m_undoStack->CanRedo();
+        return m_undoState.m_undoStack->CanRedo();
+    }
+
+    void UndoHelper::OnUndoStackChanged()
+    {
+        UndoNotificationBus::Broadcast(&UndoNotifications::OnCanUndoChanged, m_undoState.m_undoStack->CanUndo());
+        UndoNotificationBus::Broadcast(&UndoNotifications::OnCanRedoChanged, m_undoState.m_undoStack->CanRedo());
     }
 
     void UndoHelper::UpdateCache()
     {
-        ScriptCanvas::ScriptCanvasId scriptCanvasId = m_memoryAsset.GetScriptCanvasId();
+        ScriptCanvas::ScriptCanvasId scriptCanvasId = m_graph->GetScriptCanvasId();
 
         UndoCache* undoCache = nullptr;
         UndoRequestBus::EventResult(undoCache, scriptCanvasId, &UndoRequests::GetSceneUndoCache);

Gems/ScriptCanvas/Code/Editor/Assets/ScriptCanvasUndoHelper.h

@@ -8,22 +8,27 @@
 
 #pragma once
 #include <ScriptCanvas/Bus/UndoBus.h>
+#include <Editor/Undo/ScriptCanvasUndoManager.h>
 
 namespace ScriptCanvasEditor
 {
-    class ScriptCanvasMemoryAsset;
 
     // Helper class that provides the implementation for UndoRequestBus
-    class UndoHelper : UndoRequestBus::Handler
+    class UndoHelper
+        : public UndoRequestBus::Handler
+        , public AzToolsFramework::UndoSystem::IUndoNotify
     {
     public:
 
-        UndoHelper(ScriptCanvasMemoryAsset& memoryAsset);
+        UndoHelper();
+        UndoHelper(Graph* source);
         ~UndoHelper();
 
         UndoCache* GetSceneUndoCache()  override;
         UndoData CreateUndoData() override;
 
+        void SetSource(Graph* source);
+
         void BeginUndoBatch(AZStd::string_view label) override;
         void EndUndoBatch() override;
         void AddUndo(AzToolsFramework::UndoSystem::URSequencePoint* seqPoint) override;
@@ -41,6 +46,7 @@ namespace ScriptCanvasEditor
         bool CanRedo() const override;
 
     private:
+        void OnUndoStackChanged() override;
 
         void UpdateCache();
 
@@ -51,7 +57,7 @@ namespace ScriptCanvasEditor
         };
 
         Status m_status = Status::Idle;
-
-        ScriptCanvasMemoryAsset& m_memoryAsset;
+        SceneUndoState m_undoState;
+        Graph* m_graph = nullptr;
     };
 }

Gems/ScriptCanvas/Code/Editor/Components/EditorGraph.cpp

@@ -77,6 +77,7 @@ AZ_POP_DISABLE_WARNING
 #include <Libraries/Core/EBusEventHandler.h>
 #include <Libraries/Core/ReceiveScriptEvent.h>
 #include <Libraries/Core/ScriptEventBase.h>
+#include <ScriptCanvas/Assets/ScriptCanvasBaseAssetData.h>
 #include <Libraries/Core/SendScriptEvent.h>
 #include <ScriptCanvas/Asset/RuntimeAsset.h>
 #include <ScriptCanvas/Core/Connection.h>
@@ -480,6 +481,7 @@ namespace ScriptCanvasEditor
 
         ScriptCanvas::Graph::Activate();
         PostActivate();
+        m_undoHelper.SetSource(this);
     }
 
     void Graph::Deactivate()
@@ -489,7 +491,7 @@ namespace ScriptCanvasEditor
         EditorGraphRequestBus::Handler::BusDisconnect();
         SceneCounterRequestBus::Handler::BusDisconnect();
         NodeCreationNotificationBus::Handler::BusDisconnect();
-
+        AZ::SystemTickBus::Handler::BusDisconnect();
         GraphCanvas::SceneNotificationBus::Handler::BusDisconnect();
 
         GraphCanvas::GraphModelRequestBus::Handler::BusDisconnect();
@@ -1029,18 +1031,50 @@ namespace ScriptCanvasEditor
     {
         AZStd::any* connectionUserData = nullptr;
         GraphCanvas::ConnectionRequestBus::EventResult(connectionUserData, connectionId, &GraphCanvas::ConnectionRequests::GetUserData);
-        auto scConnectionId = connectionUserData && connectionUserData->is<AZ::EntityId>() ? *AZStd::any_cast<AZ::EntityId>(connectionUserData) : AZ::EntityId();
+        auto scConnectionId = connectionUserData && connectionUserData->is<AZ::EntityId>()
+            ? *AZStd::any_cast<AZ::EntityId>(connectionUserData)
+            : AZ::EntityId();
 
-        ScriptCanvas::Connection* connection = AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Connection>(scConnectionId);
-
-        if (connection)
+        if (ScriptCanvas::Connection* connection = AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Connection>(scConnectionId))
         {
-            ScriptCanvas::GraphNotificationBus::Event(GetScriptCanvasId(), &ScriptCanvas::GraphNotifications::OnDisonnectionComplete, connectionId);
-
+            ScriptCanvas::GraphNotificationBus::Event
+                ( GetScriptCanvasId()
+                , &ScriptCanvas::GraphNotifications::OnDisonnectionComplete
+                , connectionId);
             DisconnectById(scConnectionId);
         }
     }
 
+    ScriptCanvas::DataPtr Graph::Create()
+    {
+        if (AZ::Entity* entity = aznew AZ::Entity("Script Canvas Graph"))
+        {
+            auto graph = entity->CreateComponent<ScriptCanvasEditor::Graph>();
+            entity->CreateComponent<EditorGraphVariableManagerComponent>(graph->GetScriptCanvasId());
+
+            if (ScriptCanvas::DataPtr data = aznew ScriptCanvas::ScriptCanvasData())
+            {
+                data->m_scriptCanvasEntity.reset(entity);
+                graph->MarkOwnership(*data);
+                entity->Init();
+                entity->Activate();
+                return data;
+            }
+        }
+
+        return nullptr;
+    }
+
+    void Graph::MarkOwnership(ScriptCanvas::ScriptCanvasData& owner)
+    {
+        m_owner = &owner;
+    }
+
+    ScriptCanvas::DataPtr Graph::GetOwnership() const
+    {
+        return const_cast<Graph*>(this)->m_owner;
+    }
+
     bool Graph::CreateConnection(const GraphCanvas::ConnectionId& connectionId, const GraphCanvas::Endpoint& sourcePoint, const GraphCanvas::Endpoint& targetPoint)
     {
         if (!sourcePoint.IsValid() || !targetPoint.IsValid())
@@ -1323,7 +1357,8 @@ namespace ScriptCanvasEditor
 
     void Graph::SignalDirty()
     {
-        GeneralRequestBus::Broadcast(&GeneralRequests::SignalSceneDirty, GetAssetId());
+        SourceHandle handle(m_owner, {}, {});
+        GeneralRequestBus::Broadcast(&GeneralRequests::SignalSceneDirty, handle);
     }
 
     void Graph::HighlightNodesByType(const ScriptCanvas::NodeTypeIdentifier& nodeTypeIdentifier)
@@ -3354,11 +3389,6 @@ namespace ScriptCanvasEditor
         }
     }
 
-    void Graph::SetAssetType(AZ::Data::AssetType assetType)
-    {
-        m_assetType = assetType;
-    }
-
     void Graph::ReportError(const ScriptCanvas::Node& node, const AZStd::string& errorSource, const AZStd::string& errorMessage)
     {
         AzQtComponents::ToastConfiguration toastConfiguration(AzQtComponents::ToastType::Error, errorSource.c_str(), errorMessage.c_str());
@@ -3463,7 +3493,7 @@ namespace ScriptCanvasEditor
         m_focusHelper.SetActiveGraph(GetGraphCanvasGraphId());
     }
 
-    bool Graph::UpgradeGraph(const AZ::Data::Asset<AZ::Data::AssetData>& asset, UpgradeRequest request, bool isVerbose)
+    bool Graph::UpgradeGraph(SourceHandle& asset, UpgradeRequest request, bool isVerbose)
     {
         m_upgradeSM.SetAsset(asset);
         m_upgradeSM.SetVerbose(isVerbose);

Gems/ScriptCanvas/Code/Editor/Components/EditorScriptCanvasComponent.cpp

@@ -6,7 +6,6 @@
  *
  */
 
-
 #include <AzCore/Asset/AssetManagerBus.h>
 #include <AzCore/Component/ComponentApplicationBus.h>
 #include <AzCore/Component/NamedEntityId.h>
@@ -14,6 +13,7 @@
 #include <AzCore/Script/ScriptSystemBus.h>
 #include <AzCore/Serialization/EditContext.h>
 #include <AzCore/Serialization/IdUtils.h>
+#include <AzCore/Serialization/Json/RegistrationContext.h>
 #include <AzCore/Serialization/Utils.h>
 #include <AzFramework/Asset/AssetSystemBus.h>
 #include <AzFramework/StringFunc/StringFunc.h>
@@ -21,23 +21,27 @@
 #include <AzToolsFramework/API/ToolsApplicationAPI.h>
 #include <Core/ScriptCanvasBus.h>
 #include <Editor/Assets/ScriptCanvasAssetTrackerBus.h>
+#include <LyViewPaneNames.h>
 #include <ScriptCanvas/Asset/RuntimeAsset.h>
 #include <ScriptCanvas/Asset/RuntimeAsset.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAsset.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 #include <ScriptCanvas/Bus/RequestBus.h>
 #include <ScriptCanvas/Components/EditorGraph.h>
 #include <ScriptCanvas/Components/EditorGraphVariableManagerComponent.h>
 #include <ScriptCanvas/Components/EditorScriptCanvasComponent.h>
+#include <ScriptCanvas/Components/EditorScriptCanvasComponentSerializer.h>
+#include <ScriptCanvas/Components/EditorUtils.h>
 #include <ScriptCanvas/Core/Node.h>
 #include <ScriptCanvas/PerformanceStatisticsBus.h>
 
-
 namespace EditorScriptCanvasComponentCpp
 {
     enum Version
     {
         PrefabIntegration = 10,
-
+        InternalDev,
+        AddSourceHandle,
         // add description above
         Current
     };
@@ -128,7 +132,7 @@ namespace ScriptCanvasEditor
             }
 
             ScriptCanvasBuilder::BuildVariableOverrides overrides;
-            overrides.m_source = AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset>(assetHolder.GetAssetId(), assetHolder.GetAssetType(), assetHolder.GetAssetHint());;
+            overrides.m_source = SourceHandle(nullptr, assetHolder.GetAssetId().m_guid, {});
 
             for (auto& variable : editableData.GetVariables())
             {
@@ -142,6 +146,25 @@ namespace ScriptCanvasEditor
             }
         }
 
+        if (rootElement.GetVersion() < EditorScriptCanvasComponentCpp::Version::AddSourceHandle)
+        {
+            ScriptCanvasAssetHolder assetHolder;
+            if (!rootElement.FindSubElementAndGetData(AZ_CRC_CE("m_assetHolder"), assetHolder))
+            {
+                AZ_Error("ScriptCanvas", false, "EditorScriptCanvasComponent conversion failed: could not retrieve old 'm_assetHolder'");
+                return false;
+            }
+
+            auto assetId = assetHolder.GetAssetId();
+            auto path = assetHolder.GetAssetHint();
+
+            if (!rootElement.AddElementWithData(serializeContext, "runtimeDataOverrides", SourceHandle(nullptr, assetId.m_guid, path)))
+            {
+                AZ_Error("ScriptCanvas", false, "EditorScriptCanvasComponent conversion failed: failed to add 'sourceHandle'");
+                return false;
+            }
+        }
+
         return true;
     }
 
@@ -153,9 +176,9 @@ namespace ScriptCanvasEditor
             serializeContext->Class<EditorScriptCanvasComponent, EditorComponentBase>()
                 ->Version(EditorScriptCanvasComponentCpp::Version::Current, &EditorScriptCanvasComponentVersionConverter)
                 ->Field("m_name", &EditorScriptCanvasComponent::m_name)
-                ->Field("m_assetHolder", &EditorScriptCanvasComponent::m_scriptCanvasAssetHolder)
                 ->Field("runtimeDataIsValid", &EditorScriptCanvasComponent::m_runtimeDataIsValid)
                 ->Field("runtimeDataOverrides", &EditorScriptCanvasComponent::m_variableOverrides)
+                ->Field("sourceHandle", &EditorScriptCanvasComponent::m_sourceHandle)
                 ;
 
             if (AZ::EditContext* editContext = serializeContext->GetEditContext())
@@ -171,29 +194,34 @@ namespace ScriptCanvasEditor
                     ->Attribute(AZ::Edit::Attributes::AppearsInAddComponentMenu, AZ_CRC("UI", 0x27ff46b0))
                     ->Attribute(AZ::Edit::Attributes::AppearsInAddComponentMenu, AZ_CRC("Level", 0x9aeacc13))
                     ->Attribute(AZ::Edit::Attributes::HelpPageURL, "https://o3de.org/docs/user-guide/components/reference/scripting/script-canvas/")
-                    ->DataElement(AZ::Edit::UIHandlers::Default, &EditorScriptCanvasComponent::m_scriptCanvasAssetHolder, "Script Canvas Asset", "Script Canvas asset associated with this component")
-                    ->Attribute(AZ::Edit::Attributes::Visibility, AZ::Edit::PropertyVisibility::ShowChildrenOnly)
+                    ->DataElement(AZ::Edit::UIHandlers::Default, &EditorScriptCanvasComponent::m_sourceHandle, "Script Canvas Source File", "Script Canvas source file associated with this component")
+                        ->Attribute("BrowseIcon", ":/stylesheet/img/UI20/browse-edit-select-files.svg")
+                        ->Attribute("EditButton", "")
+                        ->Attribute("EditDescription", "Open in Script Canvas Editor")
+                        ->Attribute("EditCallback", &EditorScriptCanvasComponent::OpenEditor)
+                        ->Attribute(AZ::Edit::Attributes::AssetPickerTitle, "Script Canvas")
+                        ->Attribute(AZ::Edit::Attributes::SourceAssetFilterPattern, "*.scriptcanvas")
+                        ->Attribute(AZ::Edit::Attributes::ChangeNotify, &EditorScriptCanvasComponent::OnFileSelectionChanged)
                     ->DataElement(AZ::Edit::UIHandlers::Default, &EditorScriptCanvasComponent::m_variableOverrides, "Properties", "Script Canvas Graph Properties")
-                    ->Attribute(AZ::Edit::Attributes::Visibility, AZ::Edit::PropertyVisibility::ShowChildrenOnly)
+                        ->Attribute(AZ::Edit::Attributes::Visibility, AZ::Edit::PropertyVisibility::ShowChildrenOnly)
                     ;
             }
         }
+
+        if (AZ::JsonRegistrationContext* jsonContext = azrtti_cast<AZ::JsonRegistrationContext*>(context))
+        {
+            jsonContext->Serializer<AZ::EditorScriptCanvasComponentSerializer>()->HandlesType<EditorScriptCanvasComponent>();
+        }
     }
 
     EditorScriptCanvasComponent::EditorScriptCanvasComponent()
-        : EditorScriptCanvasComponent(AZ::Data::Asset<ScriptCanvasAsset>())
+        : EditorScriptCanvasComponent(SourceHandle())
     {
     }
 
-    EditorScriptCanvasComponent::EditorScriptCanvasComponent(AZ::Data::Asset<ScriptCanvasAsset> asset)
-        : m_scriptCanvasAssetHolder()
+    EditorScriptCanvasComponent::EditorScriptCanvasComponent(const SourceHandle& sourceHandle)
+        : m_sourceHandle(sourceHandle)
     {
-        if (asset.GetId().IsValid())
-        {
-            m_scriptCanvasAssetHolder.SetAsset(asset.GetId());
-        }
-
-        m_scriptCanvasAssetHolder.SetScriptChangedCB([this](AZ::Data::AssetId assetId) { OnScriptCanvasAssetChanged(assetId); });
     }
 
     EditorScriptCanvasComponent::~EditorScriptCanvasComponent()
@@ -209,50 +237,34 @@ namespace ScriptCanvasEditor
 
     void EditorScriptCanvasComponent::UpdateName()
     {
-        AZ::Data::AssetId assetId = m_scriptCanvasAssetHolder.GetAssetId();
-        if (assetId.IsValid())
+        SetName(m_sourceHandle.Path().Filename().Native());
+    }
+
+    void EditorScriptCanvasComponent::OpenEditor(const AZ::Data::AssetId&, const AZ::Data::AssetType&)
+    {
+        AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
+         
+        AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
+         
+        if (m_sourceHandle.IsDescriptionValid())
         {
-            // Pathname from the asset doesn't seem to return a value unless the asset has been loaded up once(which isn't done until we try to show it).
-            // Using the Job system to determine the asset name instead.
-            AZ::Outcome<AzToolsFramework::AssetSystem::JobInfoContainer> jobOutcome = AZ::Failure();
-            AzToolsFramework::AssetSystemJobRequestBus::BroadcastResult(jobOutcome, &AzToolsFramework::AssetSystemJobRequestBus::Events::GetAssetJobsInfoByAssetID, assetId, false, false);
-
-            AZStd::string assetPath;
-            AZStd::string assetName;
-
-            if (jobOutcome.IsSuccess())
+            GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, m_sourceHandle, Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
+         
+            if (!openOutcome)
             {
-                AzToolsFramework::AssetSystem::JobInfoContainer& jobs = jobOutcome.GetValue();
-
-                // Get the asset relative path
-                if (!jobs.empty())
-                {
-                    assetPath = jobs[0].m_sourceFile;
-                }
-
-                // Get the asset file name
-                assetName = assetPath;
-
-                if (!assetPath.empty())
-                {
-                    AzFramework::StringFunc::Path::GetFileName(assetPath.c_str(), assetName);
-                    SetName(assetName);
-                }
+                AZ_Warning("Script Canvas", openOutcome, "%s", openOutcome.GetError().data());
             }
         }
-    }
-
-    void EditorScriptCanvasComponent::OpenEditor()
-    {
-        m_scriptCanvasAssetHolder.OpenEditor();
-    }
-
-    void EditorScriptCanvasComponent::CloseGraph()
-    {
-        AZ::Data::AssetId assetId = m_scriptCanvasAssetHolder.GetAssetId();
-        if (assetId.IsValid())
+        else if (GetEntityId().IsValid())
         {
-            GeneralRequestBus::Broadcast(&GeneralRequests::CloseScriptCanvasAsset, assetId);
+            AzToolsFramework::EntityIdList selectedEntityIds;
+            AzToolsFramework::ToolsApplicationRequestBus::BroadcastResult(selectedEntityIds, &AzToolsFramework::ToolsApplicationRequests::GetSelectedEntities);
+         
+            // Going to bypass the multiple selected entities flow for right now.
+            if (selectedEntityIds.size() == 1)
+            {
+                GeneralRequestBus::Broadcast(&GeneralRequests::CreateScriptCanvasAssetFor, AZStd::make_pair(GetEntityId(), GetId()));
+            }
         }
     }
 
@@ -261,7 +273,11 @@ namespace ScriptCanvasEditor
         EditorComponentBase::Init();
         AzFramework::AssetCatalogEventBus::Handler::BusConnect();
         AzToolsFramework::EditorEntityContextNotificationBus::Handler::BusConnect();
-        m_scriptCanvasAssetHolder.Init(GetEntityId(), GetId());
+    }
+
+    void EditorScriptCanvasComponent::InitializeSource(const SourceHandle& sourceHandle)
+    {
+        m_sourceHandle = sourceHandle;
     }
 
     //=========================================================================
@@ -269,6 +285,8 @@ namespace ScriptCanvasEditor
     {
         EditorComponentBase::Activate();
 
+        AzToolsFramework::AssetSystemBus::Handler::BusConnect();
+
         AZ::EntityId entityId = GetEntityId();
 
         EditorContextMenuRequestBus::Handler::BusConnect(entityId);
@@ -277,19 +295,13 @@ namespace ScriptCanvasEditor
         EditorScriptCanvasComponentLoggingBus::Handler::BusConnect(entityId);
         EditorLoggingComponentNotificationBus::Broadcast(&EditorLoggingComponentNotifications::OnEditorScriptCanvasComponentActivated, GetNamedEntityId(), GetGraphIdentifier());
 
-        AZ::Data::AssetId fileAssetId = m_scriptCanvasAssetHolder.GetAssetId();
-
-        if (fileAssetId.IsValid())
-        {
-            AssetTrackerNotificationBus::Handler::BusConnect(fileAssetId);
-            AzToolsFramework::ToolsApplicationNotificationBus::Broadcast(&AzToolsFramework::ToolsApplicationEvents::InvalidatePropertyDisplay, AzToolsFramework::Refresh_EntireTree_NewContent);
-        }
+        AzToolsFramework::ToolsApplicationNotificationBus::Broadcast(&AzToolsFramework::ToolsApplicationEvents::InvalidatePropertyDisplay, AzToolsFramework::Refresh_EntireTree_NewContent);
     }
 
     //=========================================================================
     void EditorScriptCanvasComponent::Deactivate()
     {
-        AssetTrackerNotificationBus::Handler::BusDisconnect();
+        AzToolsFramework::AssetSystemBus::Handler::BusDisconnect();
 
         EditorScriptCanvasComponentLoggingBus::Handler::BusDisconnect();
         EditorLoggingComponentNotificationBus::Broadcast(&EditorLoggingComponentNotifications::OnEditorScriptCanvasComponentDeactivated, GetNamedEntityId(), GetGraphIdentifier());
@@ -306,7 +318,7 @@ namespace ScriptCanvasEditor
 
         m_runtimeDataIsValid = false;
 
-        auto assetTreeOutcome = LoadEditorAssetTree(m_scriptCanvasAssetHolder.GetAssetId(), m_scriptCanvasAssetHolder.GetAssetHint());
+        auto assetTreeOutcome = LoadEditorAssetTree(m_sourceHandle);
         if (!assetTreeOutcome.IsSuccess())
         {
             AZ_Warning("ScriptCanvas", false, "EditorScriptCanvasComponent::BuildGameEntityData failed: %s", assetTreeOutcome.GetError().c_str());
@@ -344,7 +356,8 @@ namespace ScriptCanvasEditor
 
         if (!m_runtimeDataIsValid)
         {
-            AZ_Error("ScriptCanvasBuilder", false, "Runtime information did not build for ScriptCanvas Component using asset: %s", m_scriptCanvasAssetHolder.GetAssetId().ToString<AZStd::string>().c_str());
+            AZ_Error("ScriptCanvasBuilder", false, "Runtime information did not build for ScriptCanvas Component using asset: %s"
+                , m_sourceHandle.ToString().c_str());
             return;
         }
 
@@ -352,123 +365,66 @@ namespace ScriptCanvasEditor
         runtimeComponent->TakeRuntimeDataOverrides(ConvertToRuntime(m_variableOverrides));
     }
 
-    void EditorScriptCanvasComponent::OnCatalogAssetAdded(const AZ::Data::AssetId& assetId)
-    {
-        if (m_removedCatalogId == assetId)
-        {
-            if (!m_scriptCanvasAssetHolder.GetAssetId().IsValid())
-            {
-                SetPrimaryAsset(assetId);
-                m_removedCatalogId.SetInvalid();
-            }
-        }
-    }
-    void EditorScriptCanvasComponent::OnCatalogAssetRemoved(const AZ::Data::AssetId& removedAssetId, const AZ::Data::AssetInfo& /*assetInfo*/)
-    {
-        AZ::Data::AssetId assetId = m_scriptCanvasAssetHolder.GetAssetId();
-        if (assetId == removedAssetId)
-        {
-            m_removedCatalogId = assetId;
-            SetPrimaryAsset({});
-        }
-    }
-
     void EditorScriptCanvasComponent::SetPrimaryAsset(const AZ::Data::AssetId& assetId)
     {
-        m_scriptCanvasAssetHolder.ClearAsset();
+        m_sourceHandle = SourceHandle(nullptr, assetId.m_guid, {});
 
-        if (assetId.IsValid())
+        auto completeAsset = CompleteDescription(m_sourceHandle);
+        if (completeAsset)
         {
-            ScriptCanvasMemoryAsset::pointer memoryAsset;
-            AssetTrackerRequestBus::BroadcastResult(memoryAsset, &AssetTrackerRequests::GetAsset, assetId);
-
-            if (memoryAsset)
-            {
-                m_scriptCanvasAssetHolder.SetAsset(memoryAsset->GetFileAssetId());
-                OnScriptCanvasAssetChanged(memoryAsset->GetFileAssetId());
-                SetName(memoryAsset->GetTabName());
-            }
-            else
-            {
-                auto scriptCanvasAsset = AZ::Data::AssetManager::Instance().FindAsset(assetId, AZ::Data::AssetLoadBehavior::Default);
-                if (scriptCanvasAsset)
-                {
-                    m_scriptCanvasAssetHolder.SetAsset(assetId);
-                }
-            }
+            m_sourceHandle = *completeAsset;
         }
 
+        OnScriptCanvasAssetChanged(SourceChangeDescription::SelectionChanged);
+        SetName(m_sourceHandle.Path().Filename().Native());
         AzToolsFramework::ToolsApplicationEvents::Bus::Broadcast(&AzToolsFramework::ToolsApplicationEvents::InvalidatePropertyDisplay, AzToolsFramework::Refresh_AttributesAndValues);
     }
 
     AZ::Data::AssetId EditorScriptCanvasComponent::GetAssetId() const
     {
-        return m_scriptCanvasAssetHolder.GetAssetId();
+        return m_sourceHandle.Id();
     }
 
-    AZ::EntityId EditorScriptCanvasComponent::GetGraphEntityId() const
+    AZ::u32 EditorScriptCanvasComponent::OnFileSelectionChanged()
     {
-        AZ::EntityId scriptCanvasEntityId;
-        AZ::Data::AssetId assetId = m_scriptCanvasAssetHolder.GetAssetId();
-
-        if (assetId.IsValid())
-        {
-            AssetTrackerRequestBus::BroadcastResult(scriptCanvasEntityId, &AssetTrackerRequests::GetScriptCanvasId, assetId);
-        }
-
-        return scriptCanvasEntityId;
+        m_sourceHandle = SourceHandle(nullptr, m_sourceHandle.Path());
+        CompleteDescriptionInPlace(m_sourceHandle);
+        m_previousHandle = {};
+        m_removedHandle = {};
+        OnScriptCanvasAssetChanged(SourceChangeDescription::SelectionChanged);
+        return AZ::Edit::PropertyRefreshLevels::EntireTree;
     }
-
-    void EditorScriptCanvasComponent::OnAssetReady(const ScriptCanvasMemoryAsset::pointer asset)
+    
+    void EditorScriptCanvasComponent::OnScriptCanvasAssetChanged(SourceChangeDescription changeDescription)
     {
-        OnScriptCanvasAssetReady(asset);
-    }
-
-    void EditorScriptCanvasComponent::OnAssetSaved(const ScriptCanvasMemoryAsset::pointer asset, bool isSuccessful)
-    {
-        if (isSuccessful)
-        {
-            OnScriptCanvasAssetReady(asset);
-        }
-    }
-
-    void EditorScriptCanvasComponent::OnAssetReloaded(const ScriptCanvasMemoryAsset::pointer asset)
-    {
-        OnScriptCanvasAssetReady(asset);
-    }
-
-    void EditorScriptCanvasComponent::OnScriptCanvasAssetChanged(AZ::Data::AssetId assetId)
-    {
-        AssetTrackerNotificationBus::Handler::BusDisconnect();
         ScriptCanvas::GraphIdentifier newIdentifier = GetGraphIdentifier();
-        newIdentifier.m_assetId = assetId;
+        newIdentifier.m_assetId = m_sourceHandle.Id();
 
         ScriptCanvas::GraphIdentifier oldIdentifier = GetGraphIdentifier();
-        oldIdentifier.m_assetId = m_previousAssetId;
+        oldIdentifier.m_assetId = m_previousHandle.Id();
 
         EditorLoggingComponentNotificationBus::Broadcast(&EditorLoggingComponentNotifications::OnAssetSwitched, GetNamedEntityId(), newIdentifier, oldIdentifier);
 
-        m_previousAssetId = m_scriptCanvasAssetHolder.GetAssetId();
+        m_previousHandle = m_sourceHandle.Describe();
 
-        // Only clear our variables when we are given a new asset id
-        // or when the asset was explicitly set to empty.
-        //
-        // i.e. do not clear variables when we lose the catalog asset.
-        if ((assetId.IsValid() && assetId != m_removedCatalogId)
-            || (!assetId.IsValid() && !m_removedCatalogId.IsValid()))
+        if (changeDescription == SourceChangeDescription::SelectionChanged)
         {
             ClearVariables();
         }
 
-        if (assetId.IsValid())
+        if (m_sourceHandle.IsDescriptionValid())
         {
-            AssetTrackerNotificationBus::Handler::BusConnect(assetId);
-
-            ScriptCanvasMemoryAsset::pointer memoryAsset;
-            AssetTrackerRequestBus::BroadcastResult(memoryAsset, &AssetTrackerRequests::GetAsset, assetId);
-            if (memoryAsset && memoryAsset->GetAsset().GetStatus() == AZ::Data::AssetData::AssetStatus::Ready)
+            if (!m_sourceHandle.Get())
             {
-                OnScriptCanvasAssetReady(memoryAsset);
+                if (auto loaded = LoadFromFile(m_sourceHandle.Path().c_str()); loaded.IsSuccess())
+                {
+                    m_sourceHandle = SourceHandle(loaded.TakeValue(), m_sourceHandle.Id(), m_sourceHandle.Path().c_str());
+                }
+            }
+
+            if (m_sourceHandle.Get())
+            {
+                UpdatePropertyDisplay(m_sourceHandle);
             }
         }
 
@@ -485,35 +441,66 @@ namespace ScriptCanvasEditor
         AZ::ScriptSystemRequestBus::Broadcast(&AZ::ScriptSystemRequests::GarbageCollect);
     }
 
-    void EditorScriptCanvasComponent::SetAssetId(const AZ::Data::AssetId& assetId)
+    void EditorScriptCanvasComponent::SetAssetId(const SourceHandle& assetId)
     {
-        if (m_scriptCanvasAssetHolder.GetAssetId() != assetId)
+        if (m_sourceHandle.Describe() != assetId.Describe())
         {
             // Invalidate the previously removed catalog id if we are setting a new asset id
-            m_removedCatalogId.SetInvalid();
-            SetPrimaryAsset(assetId);
+            m_removedHandle = {};
+            SetPrimaryAsset(assetId.Id());
+        }
+    }
+
+    void EditorScriptCanvasComponent::SourceFileChanged([[maybe_unused]] AZStd::string relativePath
+        , [[maybe_unused]] AZStd::string scanFolder, [[maybe_unused]] AZ::Uuid fileAssetId)
+    {
+        if (fileAssetId == m_sourceHandle.Id())
+        {
+            if (auto handle = CompleteDescription(SourceHandle(nullptr, fileAssetId, {})))
+            {
+                m_sourceHandle = *handle;
+                // consider queueing on tick bus
+                OnScriptCanvasAssetChanged(SourceChangeDescription::Modified);
+            }
+        }
+    }
+
+    void EditorScriptCanvasComponent::SourceFileRemoved([[maybe_unused]] AZStd::string relativePath
+        , [[maybe_unused]] AZStd::string scanFolder, [[maybe_unused]] AZ::Uuid fileAssetId)
+    {
+        if (fileAssetId == m_sourceHandle.Id())
+        {
+            m_removedHandle = m_sourceHandle;
+            OnScriptCanvasAssetChanged(SourceChangeDescription::Removed);
+        }
+    }
+
+    void EditorScriptCanvasComponent::SourceFileFailed([[maybe_unused]] AZStd::string relativePath
+        , [[maybe_unused]] AZStd::string scanFolder, [[maybe_unused]] AZ::Uuid fileAssetId)
+    {
+        if (fileAssetId == m_sourceHandle.Id())
+        {
+            m_removedHandle = m_sourceHandle;
+            OnScriptCanvasAssetChanged(SourceChangeDescription::Error);
         }
     }
 
     bool EditorScriptCanvasComponent::HasAssetId() const
     {
-        return m_scriptCanvasAssetHolder.GetAssetId().IsValid();
+        return !m_sourceHandle.Id().IsNull();
     }
 
     ScriptCanvas::GraphIdentifier EditorScriptCanvasComponent::GetGraphIdentifier() const
     {
         // For now we don't want to deal with disambiguating duplicates of the same script running on one entity.
         // Should that change we need to add the component id back into this.
-        return ScriptCanvas::GraphIdentifier(m_scriptCanvasAssetHolder.GetAssetId(), 0);
+        return ScriptCanvas::GraphIdentifier(m_sourceHandle.Id(), 0);
     }
 
-    void EditorScriptCanvasComponent::OnScriptCanvasAssetReady(const ScriptCanvasMemoryAsset::pointer memoryAsset)
+    void EditorScriptCanvasComponent::UpdatePropertyDisplay(const SourceHandle& sourceHandle)
     {
-        if (memoryAsset->GetFileAssetId() == m_scriptCanvasAssetHolder.GetAssetId())
+        if (sourceHandle.IsGraphValid())
         {
-            auto assetData = memoryAsset->GetAsset();
-            [[maybe_unused]] AZ::Entity* scriptCanvasEntity = assetData->GetScriptCanvasEntity();
-            AZ_Assert(scriptCanvasEntity, "This graph must have a valid entity");
             BuildGameEntityData();
             UpdateName();
             AzToolsFramework::ToolsApplicationNotificationBus::Broadcast(&AzToolsFramework::ToolsApplicationEvents::InvalidatePropertyDisplay, AzToolsFramework::Refresh_EntireTree_NewContent);

Gems/ScriptCanvas/Code/Editor/Components/EditorUtils.cpp

@@ -17,6 +17,7 @@ AZ_POP_DISABLE_WARNING
 #include <ScriptCanvas/Libraries/Core/EBusEventHandler.h>
 #include <ScriptCanvas/Libraries/Core/ReceiveScriptEvent.h>
 #include <ScriptCanvas/Utils/NodeUtils.h>
+#include <AzToolsFramework/API/EditorAssetSystemAPI.h>
 
 #include <Editor/GraphCanvas/GraphCanvasEditorNotificationBusId.h>
 #include <Editor/Include/ScriptCanvas/GraphCanvas/NodeDescriptorBus.h>
@@ -30,6 +31,62 @@ AZ_POP_DISABLE_WARNING
 
 namespace ScriptCanvasEditor
 {
+    AZStd::optional<SourceHandle> CompleteDescription(const SourceHandle& source)
+    {
+        if (source.IsDescriptionValid())
+        {
+            return source;
+        }
+
+        AzToolsFramework::AssetSystemRequestBus::Events* assetSystem = AzToolsFramework::AssetSystemRequestBus::FindFirstHandler();
+        if (assetSystem)
+        {
+            AZStd::string watchFolder;
+            AZ::Data::AssetInfo assetInfo;
+
+            if (!source.Id().IsNull())
+            {
+                if (assetSystem->GetSourceInfoBySourceUUID(source.Id(), assetInfo, watchFolder))
+                {
+                    AZ::IO::Path watchPath(watchFolder);
+                    AZ::IO::Path assetInfoPath(assetInfo.m_relativePath);
+                    SourceHandle fullPathHandle(nullptr, assetInfo.m_assetId.m_guid, watchPath / assetInfoPath);
+
+                    if (assetSystem->GetSourceInfoBySourcePath(fullPathHandle.Path().c_str(), assetInfo, watchFolder) && assetInfo.m_assetId.IsValid())
+                    {
+                        AZ_Warning("ScriptCanvas", assetInfo.m_assetId.m_guid == source.Id(), "SourceHandle completion produced conflicting AssetId.");
+                        auto path = fullPathHandle.Path();
+                        return SourceHandle(source, assetInfo.m_assetId.m_guid, path.MakePreferred());
+                    }
+                }
+            }
+
+            if (!source.Path().empty())
+            {
+                if (assetSystem->GetSourceInfoBySourcePath(source.Path().c_str(), assetInfo, watchFolder) && assetInfo.m_assetId.IsValid())
+                {
+                    return SourceHandle(source, assetInfo.m_assetId.m_guid, source.Path());
+                }
+            }
+        }
+
+
+        return AZStd::nullopt;
+    }
+
+    bool CompleteDescriptionInPlace(SourceHandle& source)
+    {
+        if (auto completed = CompleteDescription(source))
+        {
+            source = *completed;
+            return true;
+        }
+        else
+        {
+            return false;
+        }
+    }
+
     //////////////////////////
     // NodeIdentifierFactory
     //////////////////////////

Gems/ScriptCanvas/Code/Editor/Components/GraphUpgrade.cpp

@@ -438,10 +438,11 @@ namespace ScriptCanvasEditor
             if (nodeConfig.IsValid())
             {
                 ScriptCanvas::NodeUpdateSlotReport nodeUpdateSlotReport;
+                auto nodeEntity = node->GetEntityId();
                 auto nodeOutcome = graph->ReplaceNodeByConfig(node, nodeConfig, nodeUpdateSlotReport);
                 if (nodeOutcome.IsSuccess())
                 {
-                    ScriptCanvas::MergeUpdateSlotReport(node->GetEntityId(), sm->m_updateReport, nodeUpdateSlotReport);
+                    ScriptCanvas::MergeUpdateSlotReport(nodeEntity, sm->m_updateReport, nodeUpdateSlotReport);
 
                     sm->m_allNodes.erase(node);
                     sm->m_outOfDateNodes.erase(node);
@@ -675,20 +676,20 @@ namespace ScriptCanvasEditor
         RegisterState(ParseGraph);
     }
 
-    void EditorGraphUpgradeMachine::SetAsset(const AZ::Data::Asset<AZ::Data::AssetData>& asset)
+    void EditorGraphUpgradeMachine::SetAsset(SourceHandle& asset)
     {
         if (m_asset != asset)
         {
             m_asset = asset;
-            SetDebugPrefix(asset.GetHint());
+            SetDebugPrefix(asset.Path().c_str());
         }
     }
 
     void EditorGraphUpgradeMachine::OnComplete(IState::ExitStatus exitStatus)
     {
         UpgradeNotificationsBus::Broadcast(&UpgradeNotifications::OnGraphUpgradeComplete, m_asset, exitStatus == IState::ExitStatus::Skipped);
-
-        m_asset = {};
+        // releasing the asset at this stage of the system tick causes a memory crash
+        // m_asset = {};
     }
 
     //////////////////////////////////////////////////////////////////////

Gems/ScriptCanvas/Code/Editor/Framework/ScriptCanvasGraphUtilities.h

@@ -11,6 +11,7 @@
 #include <AzCore/Script/ScriptSystemBus.h>
 #include <Editor/Framework/ScriptCanvasTraceUtilities.h>
 #include <Editor/Framework/ScriptCanvasReporter.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 
 namespace ScriptCanvas
 {

Gems/ScriptCanvas/Code/Editor/Framework/ScriptCanvasGraphUtilities.inl

@@ -75,7 +75,7 @@ namespace ScriptCanvasEditor
                 AZ_Assert(loadResult.m_runtimeAsset, "failed to load dependent asset");
 
                 AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> luaAssetOutcome = AZ::Failure(AZStd::string("lua asset creation for function failed"));
-                ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(luaAssetOutcome, &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateLuaAsset, loadResult.m_editorAsset, loadResult.m_graphPath);
+                ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(luaAssetOutcome, &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateLuaAsset, loadResult.m_editorAsset, loadResult.m_editorAsset.Path().c_str());
                 AZ_Assert(luaAssetOutcome.IsSuccess(), "failed to create Lua asset");
 
                 AZStd::string modulePath = namespacePath[0].data();
@@ -112,18 +112,19 @@ namespace ScriptCanvasEditor
 
     AZ_INLINE LoadTestGraphResult LoadTestGraph(AZStd::string_view graphPath)
     {
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> editorAsset;
-        ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(editorAsset, &ScriptCanvasEditor::EditorAssetConversionBusTraits::LoadAsset, graphPath);
-
-        if (editorAsset.GetData())
+        if (auto loadFileOutcome = LoadFromFile(graphPath); loadFileOutcome.IsSuccess())
         {
-            AZ::Outcome< AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> assetOutcome = AZ::Failure(AZStd::string("asset creation failed"));
-            ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(assetOutcome, &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateRuntimeAsset, editorAsset);
+            auto& source = loadFileOutcome.GetValue();
+            auto testableSource = SourceHandle(source, AZ::Uuid::CreateRandom(), source.Path().c_str());
+
+            AZ::Outcome<AZ::Data::Asset<ScriptCanvas::RuntimeAsset>, AZStd::string> assetOutcome(AZ::Failure(AZStd::string("asset create failed")));
+            ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(assetOutcome
+                , &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateRuntimeAsset, testableSource);
+
             if (assetOutcome.IsSuccess())
             {
                 LoadTestGraphResult result;
-                result.m_graphPath = graphPath;
-                result.m_editorAsset = editorAsset;
+                result.m_editorAsset = AZStd::move(testableSource);
                 result.m_runtimeAsset = assetOutcome.GetValue();
                 result.m_entity = AZStd::make_unique<AZ::Entity>("Loaded Graph");
                 return result;
@@ -164,8 +165,7 @@ namespace ScriptCanvasEditor
             reporter.SetExecutionMode(mode);
 
             LoadTestGraphResult loadResult;
-            loadResult.m_graphPath = asset.GetHint().c_str();
-            loadResult.m_editorAsset = asset;
+            loadResult.m_editorAsset = SourceHandle(nullptr, assetId.m_guid, asset.GetHint());
             AZ::EntityId scriptCanvasId;
             loadResult.m_entity = AZStd::make_unique<AZ::Entity>("Loaded test graph");
             loadResult.m_runtimeAsset = runtimeAsset;
@@ -206,7 +206,8 @@ namespace ScriptCanvasEditor
             {
                 ScopedOutputSuppression outputSuppressor;
                 AZ::Outcome<ScriptCanvas::Translation::LuaAssetResult, AZStd::string> luaAssetOutcome = AZ::Failure(AZStd::string("lua asset creation failed"));
-                ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(luaAssetOutcome, &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateLuaAsset, loadResult.m_editorAsset, loadResult.m_graphPath);
+                ScriptCanvasEditor::EditorAssetConversionBus::BroadcastResult(luaAssetOutcome
+                    , &ScriptCanvasEditor::EditorAssetConversionBusTraits::CreateLuaAsset, loadResult.m_editorAsset, loadResult.m_editorAsset.Path().c_str());
                 reporter.MarkParseAttemptMade();
 
                 if (luaAssetOutcome.IsSuccess())
@@ -220,6 +221,8 @@ namespace ScriptCanvasEditor
                     {
                         RuntimeDataOverrides runtimeDataOverrides;
                         runtimeDataOverrides.m_runtimeAsset = loadResult.m_runtimeAsset;
+                        runtimeDataOverrides.m_runtimeAsset.SetHint("original");
+                        runtimeDataOverrides.m_runtimeAsset.Get()->m_runtimeData.m_script.SetHint("original");
 
 #if defined(LINUX) //////////////////////////////////////////////////////////////////////////
                         // Temporarily disable testing on the Linux build until the file name casing discrepancy
@@ -265,6 +268,10 @@ namespace ScriptCanvasEditor
 
                                 RuntimeDataOverrides dependencyRuntimeDataOverrides;
                                 dependencyRuntimeDataOverrides.m_runtimeAsset = dependency.runtimeAsset;
+                                AZStd::string dependencyHint = AZStd::string::format("dependency_%d", index);
+                                dependencyRuntimeDataOverrides.m_runtimeAsset.SetHint(dependencyHint);
+                                dependencyRuntimeDataOverrides.m_runtimeAsset.Get()->m_runtimeData.m_script.SetHint(dependencyHint);
+
                                 runtimeDataOverrides.m_dependencies.push_back(dependencyRuntimeDataOverrides);
 
                                 RuntimeData& dependencyData = dependencyDataBuffer[index];

Gems/ScriptCanvas/Code/Editor/Framework/ScriptCanvasTraceUtilities.h

@@ -27,6 +27,7 @@
 #include <ScriptCanvas/Libraries/Logic/Logic.h>
 #include <ScriptCanvas/Libraries/Math/Math.h>
 #include <ScriptCanvas/Variable/VariableBus.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 
 namespace AZ
 {
@@ -45,11 +46,10 @@ namespace ScriptCanvasEditor
 
     struct LoadTestGraphResult
     {
-        AZStd::string_view m_graphPath;
         AZStd::unique_ptr<AZ::Entity> m_entity;
         ScriptCanvas::RuntimeComponent* m_runtimeComponent = nullptr;
         bool m_nativeFunctionFound = false;
-        AZ::Data::Asset<ScriptCanvasEditor::ScriptCanvasAsset> m_editorAsset;
+        SourceHandle m_editorAsset;
         AZ::Data::Asset<ScriptCanvas::RuntimeAsset> m_runtimeAsset;
         AZ::Data::Asset<AZ::ScriptAsset> m_scriptAsset;
     };
@@ -161,7 +161,7 @@ namespace ScriptCanvasEditor
 
     struct ScopedOutputSuppression
     {
-        ScopedOutputSuppression(bool suppressState = true)
+        ScopedOutputSuppression([[maybe_unused]] bool suppressState = true)
         {
             AZ::Debug::TraceMessageBus::BroadcastResult(m_oldSuppression, &AZ::Debug::TraceMessageEvents::OnOutput, "", "");
             TraceSuppressionBus::Broadcast(&TraceSuppressionRequests::SuppressAllOutput, suppressState);

Gems/ScriptCanvas/Code/Editor/GraphCanvas/Components/NodeDescriptors/FunctionNodeDescriptorComponent.cpp

@@ -97,7 +97,8 @@ namespace ScriptCanvasEditor
         }
 
         AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
-        GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, assetInfo.m_assetId, -1);
+        GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset
+            , SourceHandle( nullptr, assetInfo.m_assetId.m_guid, {} ), Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
         return openOutcome.IsSuccess();
     }
 

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Assets/ScriptCanvasAssetHandler.h

@@ -20,11 +20,6 @@ namespace AZ
 
 namespace ScriptCanvasEditor
 {
-    AZ::Outcome<void, AZStd::string> LoadScriptCanvasDataFromJson
-        ( ScriptCanvas::ScriptCanvasData& dataTarget
-        , AZStd::string_view source
-        , AZ::SerializeContext& serializeContext);
-
     /**
     * Manages editor Script Canvas graph assets.
     */

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Assets/ScriptCanvasBaseAssetData.cpp

@@ -7,17 +7,4 @@
  */
 
 #include <ScriptCanvas/Assets/ScriptCanvasBaseAssetData.h>
-#include <ScriptCanvas/Components/EditorGraph.h>
 
-namespace ScriptCanvas
-{
-    Graph* ScriptCanvasData::ModGraph()
-    {
-        return AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Graph>(m_scriptCanvasEntity.get());
-    }
-
-    const Graph* ScriptCanvasData::GetGraph() const
-    {
-        return AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Graph>(m_scriptCanvasEntity.get());
-    }
-}

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Assets/ScriptCanvasBaseAssetData.h

@@ -13,27 +13,5 @@
 
 namespace ScriptCanvas
 {
-    class ScriptCanvasData
-    {
-    public:
-
-        AZ_RTTI(ScriptCanvasData, "{1072E894-0C67-4091-8B64-F7DB324AD13C}");
-        AZ_CLASS_ALLOCATOR(ScriptCanvasData, AZ::SystemAllocator, 0);
-        ScriptCanvasData() {}
-        virtual ~ScriptCanvasData() {}
-        ScriptCanvasData(ScriptCanvasData&& other);
-        ScriptCanvasData& operator=(ScriptCanvasData&& other);
-
-        static void Reflect(AZ::ReflectContext* reflectContext);
-
-        AZ::Entity* GetScriptCanvasEntity() const { return m_scriptCanvasEntity.get(); }
-
-        Graph* ModGraph();
-
-        const Graph* GetGraph() const;
-
-        AZStd::unique_ptr<AZ::Entity> m_scriptCanvasEntity;
-    private:
-        ScriptCanvasData(const ScriptCanvasData&) = delete;
-    };
+   
 }

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Assets/ScriptCanvasFileHandling.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Asset/AssetManager.h>
+#include <AzCore/Asset/AssetTypeInfoBus.h>
+#include <AzCore/Serialization/ObjectStream.h>
+#include <ScriptCanvas/Assets/ScriptCanvasAsset.h>
+
+namespace AZ
+{
+    class SerializeContext;
+}
+
+namespace ScriptCanvas
+{
+    class ScriptCanvasData;
+}
+
+namespace ScriptCanvasEditor
+{
+    class EditorAssetTree
+    {
+    public:
+        AZ_CLASS_ALLOCATOR(EditorAssetTree, AZ::SystemAllocator, 0);
+
+        EditorAssetTree* m_parent = nullptr;
+        AZStd::vector<EditorAssetTree> m_dependencies;
+        SourceHandle m_asset;
+
+        EditorAssetTree* ModRoot();
+
+        void SetParent(EditorAssetTree& parent);
+
+        AZStd::string ToString(size_t depth = 0) const;
+    };
+
+    AZ::Outcome<SourceHandle, AZStd::string> LoadFromFile(AZStd::string_view path);
+
+    AZ::Outcome<void, AZStd::string> LoadDataFromJson
+        ( ScriptCanvas::ScriptCanvasData& dataTarget
+        , AZStd::string_view source
+        , AZ::SerializeContext& serializeContext);
+
+    AZ::Outcome<EditorAssetTree, AZStd::string> LoadEditorAssetTree(SourceHandle handle, EditorAssetTree* parent = nullptr);
+        
+    AZ::Outcome<void, AZStd::string> SaveToStream(const SourceHandle& source, AZ::IO::GenericStream& stream);
+}

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Bus/EditorScriptCanvasBus.h

@@ -26,6 +26,8 @@
 #include <ScriptCanvas/Variable/VariableCore.h>
 #include <AzCore/Interface/Interface.h>
 
+#include <ScriptCanvas/Core/Core.h>
+
 namespace GraphCanvas
 {
     class GraphCanvasTreeItem;
@@ -70,7 +72,7 @@ namespace ScriptCanvasEditor
         static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
         using BusIdType = AZ::EntityId;
 
-        virtual void SetAssetId(const AZ::Data::AssetId& assetId) = 0;
+        virtual void SetAssetId(const SourceHandle& assetId) = 0;
         virtual bool HasAssetId() const = 0;
     };
 
@@ -89,40 +91,13 @@ namespace ScriptCanvasEditor
     };
 
     using EditorContextMenuRequestBus = AZ::EBus<EditorContextMenuRequests>;
-
-    class EditorScriptCanvasAssetNotifications : public AZ::EBusTraits
-    {
-    public:
-        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
-        using BusIdType = AZ::Data::AssetId;
-
-        //! Notification which fires after an EditorGraph has received it's on AssetReady callback
-        //! \param scriptCanvasAsset Script Canvas asset which is now ready for use in the Editor
-        virtual void OnScriptCanvasAssetReady(const AZ::Data::Asset<ScriptCanvas::ScriptCanvasAssetBase>& /*scriptCanvasAsset*/) {};
-
-        //! Notification which fires after an EditorGraph has received it's on AssetReloaded callback
-        //! \param scriptCanvasAsset Script Canvas asset which is now ready for use in the Editor
-        virtual void OnScriptCanvasAssetReloaded(const AZ::Data::Asset<ScriptCanvas::ScriptCanvasAssetBase>& /*scriptCanvaAsset */) {};
-
-        //! Notification which fires after an EditorGraph has received it's on AssetReady callback
-        //! \param AssetId AssetId of unloaded ScriptCanvas
-        virtual void OnScriptCanvasAssetUnloaded(const AZ::Data::AssetId& /*assetId*/) {};
-
-        //! Notification which fires after an EditorGraph has received an onAssetSaved callback
-        //! \param scriptCanvasAsset Script Canvas asset which was attempted to be saved
-        //! \param isSuccessful specified where the Script Canvas asset was successfully saved
-        virtual void OnScriptCanvasAssetSaved(const AZ::Data::AssetId) {};
-    };
-    using EditorScriptCanvasAssetNotificationBus = AZ::EBus<EditorScriptCanvasAssetNotifications>;
-    
+        
     class EditorGraphRequests : public AZ::EBusTraits
     {
     public:
         static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
         using BusIdType = ScriptCanvas::ScriptCanvasId;
 
-        virtual void SetAssetId(const AZ::Data::AssetId& assetId) = 0;
-
         virtual void CreateGraphCanvasScene() = 0;
         virtual void ClearGraphCanvasScene() = 0;
         virtual GraphCanvas::GraphId GetGraphCanvasGraphId() const = 0;
@@ -225,7 +200,7 @@ namespace ScriptCanvasEditor
         virtual void OnUpgradeStart() {}
         virtual void OnUpgradeCancelled() {}
 
-        virtual void OnGraphUpgradeComplete(AZ::Data::Asset<AZ::Data::AssetData>&, bool skipped = false) { (void)skipped; }
+        virtual void OnGraphUpgradeComplete(SourceHandle&, bool skipped = false) { (void)skipped; }
     };
 
     using UpgradeNotificationsBus = AZ::EBus<UpgradeNotifications>;

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Bus/RequestBus.h

@@ -8,18 +8,16 @@
 
 #pragma once
 
-#include <AzCore/EBus/EBus.h>
-#include <AzCore/Component/EntityId.h>
-#include <AzCore/Component/Entity.h>
 #include <AzCore/Asset/AssetCommon.h>
-#include <AzCore/Outcome/Outcome.h>
+#include <AzCore/Component/Entity.h>
+#include <AzCore/Component/EntityId.h>
+#include <AzCore/EBus/EBus.h>
 #include <AzCore/Math/Vector2.h>
-
+#include <AzCore/Outcome/Outcome.h>
 #include <GraphCanvas/Types/Types.h>
-
-#include <ScriptCanvas/Bus/ScriptCanvasBus.h>
 #include <ScriptCanvas/Bus/NodeIdPair.h>
-
+#include <ScriptCanvas/Bus/ScriptCanvasBus.h>
+#include <ScriptCanvas/Core/Core.h>
 #include <ScriptCanvas/Data/Data.h>
 
 class QLineEdit;
@@ -49,6 +47,17 @@ namespace ScriptCanvasEditor
     struct CategoryInformation;
     struct NodePaletteModelInformation;
 
+    namespace Tracker
+    {
+        enum class ScriptCanvasFileState : AZ::s32
+        {
+            NEW,
+            MODIFIED,
+            UNMODIFIED,
+            SOURCE_REMOVED,
+            INVALID = -1
+        };
+    }
 
     namespace Widget
     {
@@ -70,16 +79,16 @@ namespace ScriptCanvasEditor
         //! Opens an existing graph and returns the tab index in which it was open in.
         //! \param File AssetId
         //! \return index of open tab if the asset was able to be open successfully or error message of why the open failed
-        virtual AZ::Outcome<int, AZStd::string> OpenScriptCanvasAsset(AZ::Data::AssetId scriptCanvasAssetId, int tabIndex = -1) = 0;
-        virtual AZ::Outcome<int, AZStd::string> OpenScriptCanvasAssetId(const AZ::Data::AssetId& scriptCanvasAsset) = 0;        
+        virtual AZ::Outcome<int, AZStd::string> OpenScriptCanvasAsset(SourceHandle scriptCanvasAssetId, Tracker::ScriptCanvasFileState fileState, int tabIndex = -1) = 0;
+        virtual AZ::Outcome<int, AZStd::string> OpenScriptCanvasAssetId(const SourceHandle& scriptCanvasAsset, Tracker::ScriptCanvasFileState fileState) = 0;
         
-        virtual int CloseScriptCanvasAsset(const AZ::Data::AssetId&) = 0;
+        virtual int CloseScriptCanvasAsset(const SourceHandle&) = 0;
 
         virtual bool CreateScriptCanvasAssetFor(const TypeDefs::EntityComponentId& requestingComponent) = 0;
 
-        virtual bool IsScriptCanvasAssetOpen(const AZ::Data::AssetId& assetId) const = 0;
+        virtual bool IsScriptCanvasAssetOpen(const SourceHandle& assetId) const = 0;
 
-        virtual void OnChangeActiveGraphTab(AZ::Data::AssetId) {}
+        virtual void OnChangeActiveGraphTab(SourceHandle) {}
 
         virtual void CreateNewRuntimeAsset() = 0;
 
@@ -103,12 +112,12 @@ namespace ScriptCanvasEditor
             return ScriptCanvas::ScriptCanvasId();
         }
 
-        virtual GraphCanvas::GraphId FindGraphCanvasGraphIdByAssetId([[maybe_unused]] const AZ::Data::AssetId& assetId) const
+        virtual GraphCanvas::GraphId FindGraphCanvasGraphIdByAssetId([[maybe_unused]] const SourceHandle& assetId) const
         {
             return GraphCanvas::GraphId();
         }
 
-        virtual ScriptCanvas::ScriptCanvasId FindScriptCanvasIdByAssetId([[maybe_unused]] const AZ::Data::AssetId& assetId) const
+        virtual ScriptCanvas::ScriptCanvasId FindScriptCanvasIdByAssetId([[maybe_unused]] const SourceHandle& assetId) const
         {
             return ScriptCanvas::ScriptCanvasId();
         }
@@ -126,7 +135,7 @@ namespace ScriptCanvasEditor
         virtual void DisconnectEndpoints(const AZ::EntityId& /*sceneId*/, const AZStd::vector<GraphCanvas::Endpoint>& /*endpoints*/) {}
 
         virtual void PostUndoPoint(ScriptCanvas::ScriptCanvasId) = 0;
-        virtual void SignalSceneDirty(AZ::Data::AssetId) = 0;
+        virtual void SignalSceneDirty(SourceHandle) = 0;
 
         // Increment the value of the ignore undo point tracker
         virtual void PushPreventUndoStateUpdate() = 0;
@@ -165,7 +174,7 @@ namespace ScriptCanvasEditor
     public:
         static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Multiple;
         static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
-        using BusIdType = AZ::Data::AssetId;
+        using BusIdType = SourceHandle;
 
         virtual void OnAssetVisualized() {};
         virtual void OnAssetUnloaded() {};

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/EditorGraph.h

@@ -34,6 +34,7 @@
 #include <GraphCanvas/Widgets/NodePropertyBus.h>
 
 #include <Editor/Include/ScriptCanvas/Components/GraphUpgrade.h>
+#include <Editor/Assets/ScriptCanvasUndoHelper.h>
 
 namespace ScriptCanvas
 {
@@ -101,6 +102,8 @@ namespace ScriptCanvasEditor
     public:
         AZ_COMPONENT(Graph, "{4D755CA9-AB92-462C-B24F-0B3376F19967}", ScriptCanvas::Graph);
 
+        static ScriptCanvas::DataPtr Create();
+
         static void Reflect(AZ::ReflectContext* context);
 
         Graph(const ScriptCanvas::ScriptCanvasId& scriptCanvasId = AZ::Entity::MakeId())
@@ -138,10 +141,6 @@ namespace ScriptCanvasEditor
         void ReleaseVariableCounter(AZ::u32 variableCounter) override;
         ////
 
-        // RuntimeBus
-        AZ::Data::AssetId GetAssetId() const override { return m_assetId; }
-        ////
-
         // GraphCanvas::GraphModelRequestBus
         void RequestUndoPoint() override;
 
@@ -221,9 +220,6 @@ namespace ScriptCanvasEditor
         void OnGraphCanvasNodeCreated(const AZ::EntityId& nodeId) override;
         ///////////////////////////
 
-        // EditorGraphRequestBus
-        void SetAssetId(const AZ::Data::AssetId& assetId) override { m_assetId = assetId; }
-
         void CreateGraphCanvasScene() override;
         void ClearGraphCanvasScene() override;
         void DisplayGraphCanvasScene() override;
@@ -235,7 +231,7 @@ namespace ScriptCanvasEditor
             IfOutOfDate,
             Forced
         };
-        bool UpgradeGraph(const AZ::Data::Asset<AZ::Data::AssetData>& asset, UpgradeRequest request, bool isVerbose = true);
+        bool UpgradeGraph(SourceHandle& asset, UpgradeRequest request, bool isVerbose = true);
         void ConnectGraphCanvasBuses();
         void DisconnectGraphCanvasBuses();
         ///////
@@ -302,12 +298,13 @@ namespace ScriptCanvasEditor
         void OnUndoRedoEnd() override;
         ////
 
-        void SetAssetType(AZ::Data::AssetType);
-
         void ReportError(const ScriptCanvas::Node& node, const AZStd::string& errorSource, const AZStd::string& errorMessage) override;
 
         const GraphStatisticsHelper& GetNodeUsageStatistics() const;
 
+        void MarkOwnership(ScriptCanvas::ScriptCanvasData& owner);
+        ScriptCanvas::DataPtr GetOwnership() const;
+
         // Finds and returns all nodes within the graph that are of the specified type
         template <typename NodeType>
         AZStd::vector<const NodeType*> GetNodesOfType() const
@@ -384,12 +381,15 @@ namespace ScriptCanvasEditor
 
         GraphCanvas::NodeFocusCyclingHelper m_focusHelper;
         GraphStatisticsHelper m_statisticsHelper;
+        UndoHelper m_undoHelper;
 
         bool m_ignoreSaveRequests;
 
         //! Defaults to true to signal that this graph does not have the GraphCanvas stuff intermingled
         bool m_saveFormatConverted = true;
 
-        AZ::Data::AssetId m_assetId;
+        ScriptCanvasEditor::SourceHandle m_assetId;
+        // temporary step in cleaning up the graph / asset class structure. This reference is deliberately weak.
+        ScriptCanvas::ScriptCanvasData* m_owner;
     };
 }

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/EditorScriptCanvasComponent.h

@@ -17,6 +17,7 @@
 #include <ScriptCanvas/Bus/EditorScriptCanvasBus.h>
 #include <ScriptCanvas/Execution/RuntimeComponent.h>
 #include <ScriptCanvas/Variable/VariableBus.h>
+#include <AzToolsFramework/API/EditorAssetSystemAPI.h>
 
 namespace ScriptCanvasEditor
 {
@@ -34,9 +35,9 @@ namespace ScriptCanvasEditor
         : public AzToolsFramework::Components::EditorComponentBase
         , private EditorContextMenuRequestBus::Handler
         , private AzFramework::AssetCatalogEventBus::Handler
+        , private AzToolsFramework::AssetSystemBus::Handler
         , private EditorScriptCanvasComponentLoggingBus::Handler
         , private EditorScriptCanvasComponentRequestBus::Handler
-        , private AssetTrackerNotificationBus::Handler
         , private AzToolsFramework::EditorEntityContextNotificationBus::Handler
 
     {
@@ -44,9 +45,12 @@ namespace ScriptCanvasEditor
         AZ_COMPONENT(EditorScriptCanvasComponent, "{C28E2D29-0746-451D-A639-7F113ECF5D72}", AzToolsFramework::Components::EditorComponentBase);
 
         EditorScriptCanvasComponent();
-        EditorScriptCanvasComponent(AZ::Data::Asset<ScriptCanvasAsset> asset);
+        EditorScriptCanvasComponent(const SourceHandle& sourceHandle);
         ~EditorScriptCanvasComponent() override;
 
+        // sets the soure but does not attempt to load anything;
+        void InitializeSource(const SourceHandle& sourceHandle);
+
         //=====================================================================
         // AZ::Component
         void Init() override;
@@ -66,17 +70,16 @@ namespace ScriptCanvasEditor
         ScriptCanvas::GraphIdentifier GetGraphIdentifier() const override;
         //=====================================================================
 
-        void OpenEditor();
-        void CloseGraph();
-
-        void SetName(const AZStd::string& name) { m_name = name; }
+        void OpenEditor(const AZ::Data::AssetId&, const AZ::Data::AssetType&);
+        
+        void SetName(AZStd::string_view name) { m_name = name; }
         const AZStd::string& GetName() const;
         AZ::EntityId GetEditorEntityId() const { return GetEntity() ? GetEntityId() : AZ::EntityId(); }
         AZ::NamedEntityId GetNamedEditorEntityId() const { return GetEntity() ? GetNamedEntityId() : AZ::NamedEntityId(); }
 
         //=====================================================================
         // EditorScriptCanvasComponentRequestBus
-        void SetAssetId(const AZ::Data::AssetId& assetId) override;
+        void SetAssetId(const SourceHandle& assetId) override;
         bool HasAssetId() const override;
         //=====================================================================
 
@@ -84,14 +87,8 @@ namespace ScriptCanvasEditor
         // EditorContextMenuRequestBus
         AZ::Data::AssetId GetAssetId() const override;
         //=====================================================================
-        AZ::EntityId GetGraphEntityId() const;
-
-        //=====================================================================
-        // AssetTrackerNotificationBus
-        void OnAssetReady(const ScriptCanvasMemoryAsset::pointer asset) override;
-        void OnAssetSaved(const ScriptCanvasMemoryAsset::pointer asset, bool isSuccessful) override;
-        void OnAssetReloaded(const ScriptCanvasMemoryAsset::pointer asset) override;
-        //=====================================================================
+        
+       
 
 
         //=====================================================================
@@ -101,6 +98,14 @@ namespace ScriptCanvasEditor
         void OnStopPlayInEditor() override;
 
     protected:
+        enum class SourceChangeDescription : AZ::u8
+        {
+            Error,
+            Modified,
+            Removed,
+            SelectionChanged,
+        };
+
         static void Reflect(AZ::ReflectContext* context);
 
         static void GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided)
@@ -118,25 +123,31 @@ namespace ScriptCanvasEditor
             (void)incompatible;
         }
 
-        void OnCatalogAssetAdded(const AZ::Data::AssetId& assetId) override;
-        void OnCatalogAssetRemoved(const AZ::Data::AssetId& assetId, const AZ::Data::AssetInfo& assetInfo) override;
-        void OnScriptCanvasAssetChanged(AZ::Data::AssetId assetId);
+        // complete the id, load call OnScriptCanvasAssetChanged
+        void SourceFileChanged(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid fileAssetId) override;
+        // update the display icon for failure, save the values in the graph
+        void SourceFileRemoved(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid fileAssetId) override;
+        void SourceFileFailed(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid fileAssetId) override;
+
+        AZ::u32 OnFileSelectionChanged();
+
+        void OnScriptCanvasAssetChanged(SourceChangeDescription changeDescription);
 
         void UpdateName();
 
         //=====================================================================
-        void OnScriptCanvasAssetReady(const ScriptCanvasMemoryAsset::pointer asset);
+        void UpdatePropertyDisplay(const SourceHandle& sourceHandle);
         //=====================================================================
 
         void BuildGameEntityData();
         void ClearVariables();
 
     private:
-        AZ::Data::AssetId m_removedCatalogId;
-        AZ::Data::AssetId m_previousAssetId;
         AZStd::string m_name;
-        ScriptCanvasAssetHolder m_scriptCanvasAssetHolder;
         bool m_runtimeDataIsValid = false;
         ScriptCanvasBuilder::BuildVariableOverrides m_variableOverrides;
+        SourceHandle m_sourceHandle;
+        SourceHandle m_previousHandle;
+        SourceHandle m_removedHandle;
     };
 }

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/EditorScriptCanvasComponentSerializer.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzCore/Serialization/Json/JsonSerialization.h>
+#include <ScriptCanvas/Asset/RuntimeAsset.h>
+#include <ScriptCanvas/Components/EditorScriptCanvasComponentSerializer.h>
+#include <ScriptCanvas/Components/EditorScriptCanvasComponent.h>
+
+namespace AZ
+{
+    AZ_CLASS_ALLOCATOR_IMPL(EditorScriptCanvasComponentSerializer, SystemAllocator, 0);
+
+    JsonSerializationResult::Result EditorScriptCanvasComponentSerializer::Load
+        ( void* outputValue
+        , const Uuid& outputValueTypeId
+        , const rapidjson::Value& inputValue
+        , JsonDeserializerContext& context)
+    {
+        namespace JSR = JsonSerializationResult;
+
+        AZ_Assert(outputValueTypeId == azrtti_typeid<ScriptCanvasEditor::EditorScriptCanvasComponent>()
+            , "EditorScriptCanvasComponentSerializer Load against output typeID that was not EditorScriptCanvasComponent");
+        AZ_Assert(outputValue, "EditorScriptCanvasComponentSerializer Load against null output");
+
+        auto outputComponent = reinterpret_cast<ScriptCanvasEditor::EditorScriptCanvasComponent*>(outputValue);
+        JsonSerializationResult::ResultCode result = BaseJsonSerializer::Load(outputValue, outputValueTypeId, inputValue, context);
+
+        if (result.GetProcessing() != JSR::Processing::Halted)
+        {
+            auto assetHolderMember = inputValue.FindMember("m_assetHolder");
+            if (assetHolderMember != inputValue.MemberEnd())
+            {
+                ScriptCanvasEditor::ScriptCanvasAssetHolder assetHolder;
+                result.Combine
+                    ( ContinueLoading(&assetHolder
+                        , azrtti_typeid<ScriptCanvasEditor::ScriptCanvasAssetHolder>(), assetHolderMember->value, context));
+
+                if (result.GetProcessing() != JSR::Processing::Halted)
+                {
+                    outputComponent->InitializeSource
+                        ( ScriptCanvasEditor::SourceHandle(nullptr, assetHolder.GetAssetId().m_guid, assetHolder.GetAssetHint()));
+                }
+            }
+        }
+
+        return context.Report(result, result.GetProcessing() != JSR::Processing::Halted
+            ? "EditorScriptCanvasComponentSerializer Load finished loading EditorScriptCanvasComponent"
+            : "EditorScriptCanvasComponentSerializer Load failed to load EditorScriptCanvasComponent");
+    }
+}

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/EditorScriptCanvasComponentSerializer.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/Memory/Memory.h>
+#include <AzCore/Serialization/Json/BaseJsonSerializer.h>
+#include <AzCore/Serialization/SerializeContext.h>
+
+namespace AZ
+{
+    class EditorScriptCanvasComponentSerializer
+        : public BaseJsonSerializer
+    {
+    public:
+        AZ_RTTI(EditorScriptCanvasComponentSerializer, "{80B497B3-ABC1-4991-A3C4-047A8CB2C26C}", BaseJsonSerializer);
+        AZ_CLASS_ALLOCATOR_DECL;
+
+    private:
+        JsonSerializationResult::Result Load
+            ( void* outputValue
+            , const Uuid& outputValueTypeId
+            , const rapidjson::Value& inputValue
+            , JsonDeserializerContext& context) override;
+    };
+}

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/EditorUtils.h

@@ -21,6 +21,13 @@ namespace GraphCanvas
 
 namespace ScriptCanvasEditor
 {
+    // If only the Path or the Id is valid, attempts to fill in the missing piece.
+    // If both Path and Id is valid, including after correction, returns the handle including source Data,
+    // otherwise, returns null
+    AZStd::optional<SourceHandle> CompleteDescription(const SourceHandle& source);
+    // if CompleteDescription() succeeds, sets the handle to the result, else does nothing
+    bool CompleteDescriptionInPlace(SourceHandle& source);
+
     class Graph;
     class NodePaletteModel;
 

Gems/ScriptCanvas/Code/Editor/Include/ScriptCanvas/Components/GraphUpgrade.h

@@ -184,9 +184,9 @@ namespace ScriptCanvasEditor
         bool m_graphNeedsDirtying = false;
 
         Graph* m_graph = nullptr;
-        AZ::Data::Asset<AZ::Data::AssetData> m_asset;
+        SourceHandle m_asset;
 
-        void SetAsset(const AZ::Data::Asset<AZ::Data::AssetData>& asset);
+        void SetAsset(SourceHandle& assetasset);
 
         void OnComplete(IState::ExitStatus exitStatus) override;
 

Gems/ScriptCanvas/Code/Editor/Nodes/NodeDisplayUtils.cpp

@@ -393,7 +393,7 @@ namespace ScriptCanvasEditor::Nodes
 
                 if (methodNode->HasBusID() && busId == slot.GetId() && slot.GetDescriptor() == ScriptCanvas::SlotDescriptors::DataIn())
                 {
-                    key = Translation::GlobalKeys::EBusSenderIDKey;
+                    key = ::Translation::GlobalKeys::EBusSenderIDKey;
                     GraphCanvas::TranslationRequestBus::BroadcastResult(details, &GraphCanvas::TranslationRequests::GetDetails, key + ".details", details);
                 }
                 else
@@ -508,7 +508,7 @@ namespace ScriptCanvasEditor::Nodes
                 if (busNode->IsIDRequired() && slot->GetDescriptor() == ScriptCanvas::SlotDescriptors::DataIn())
                 {
                     GraphCanvas::TranslationKey key;
-                    key << Translation::GlobalKeys::EBusHandlerIDKey << "details";
+                    key << ::Translation::GlobalKeys::EBusHandlerIDKey << "details";
                     GraphCanvas::TranslationRequests::Details details;
                     details.m_name = slot->GetName();
                     details.m_tooltip = slot->GetToolTip();
@@ -726,7 +726,7 @@ namespace ScriptCanvasEditor::Nodes
                 if (busNode->IsIDRequired() && slot->GetDescriptor() == ScriptCanvas::SlotDescriptors::DataIn())
                 {
                     GraphCanvas::TranslationKey key;
-                    key << Translation::GlobalKeys::EBusHandlerIDKey << "details";
+                    key << ::Translation::GlobalKeys::EBusHandlerIDKey << "details";
                     GraphCanvas::TranslationRequests::Details details;
                     GraphCanvas::TranslationRequestBus::BroadcastResult(details, &GraphCanvas::TranslationRequests::GetDetails, key, details);
                     GraphCanvas::SlotRequestBus::Event(gcSlotId, &GraphCanvas::SlotRequests::SetDetails, details.m_name, details.m_tooltip);

Gems/ScriptCanvas/Code/Editor/QtMetaTypes.h

@@ -11,11 +11,13 @@ AZ_PUSH_DISABLE_WARNING(4251 4800 4244, "-Wunknown-warning-option")
 #include <QMetaType>
 AZ_POP_DISABLE_WARNING
 
+#include <ScriptCanvas/Core/Core.h>
 #include <ScriptCanvas/Data/Data.h>
 #include <ScriptCanvas/Variable/VariableCore.h>
-
 // VariableId is a UUID typedef for now. So we don't want to double reflect the UUID.
 Q_DECLARE_METATYPE(AZ::Uuid);
 Q_DECLARE_METATYPE(AZ::Data::AssetId);
 Q_DECLARE_METATYPE(ScriptCanvas::Data::Type);
 Q_DECLARE_METATYPE(ScriptCanvas::VariableId);
+Q_DECLARE_METATYPE(ScriptCanvasEditor::SourceHandle);
+

Gems/ScriptCanvas/Code/Editor/ReflectComponent.cpp

@@ -31,6 +31,7 @@ namespace ScriptCanvasEditor
 {
     void ReflectComponent::Reflect(AZ::ReflectContext* context)
     {
+        SourceHandle::Reflect(context);
         ScriptCanvas::ScriptCanvasData::Reflect(context);
         ScriptCanvasAssetHolder::Reflect(context);
         EditorSettings::EditorWorkspace::Reflect(context);        

Gems/ScriptCanvas/Code/Editor/Settings.cpp

@@ -92,13 +92,11 @@ namespace ScriptCanvasEditor
 
         // WorkspaceAssetSaveData
         EditorWorkspace::WorkspaceAssetSaveData::WorkspaceAssetSaveData()
-            : m_assetType(azrtti_typeid<ScriptCanvasAsset>())
         {
         }
 
-        EditorWorkspace::WorkspaceAssetSaveData::WorkspaceAssetSaveData(const AZ::Data::AssetId& assetId)
+        EditorWorkspace::WorkspaceAssetSaveData::WorkspaceAssetSaveData(SourceHandle assetId)
             : m_assetId(assetId)
-            , m_assetType(azrtti_typeid<ScriptCanvasAsset>())
         {
         }
 
@@ -108,7 +106,7 @@ namespace ScriptCanvasEditor
             {
                 AZStd::vector<WorkspaceAssetSaveData> assetSaveData;
                 AZStd::vector<AZ::Data::AssetId> assetIds;
-                auto subElement = rootDataElementNode.FindSubElement(AZ_CRC("ActiveAssetIds", 0xe445268a));
+                auto subElement = rootDataElementNode.FindSubElement(AZ_CRC_CE("ActiveAssetIds"));
 
                 if (subElement)
                 {
@@ -117,15 +115,21 @@ namespace ScriptCanvasEditor
                         assetSaveData.reserve(assetIds.size());
                         for (const AZ::Data::AssetId& assetId : assetIds)
                         {
-                            assetSaveData.emplace_back(assetId);
+                            assetSaveData.emplace_back(SourceHandle( nullptr, assetId.m_guid, "" ));
                         }
                     }
                 }
 
-                rootDataElementNode.RemoveElementByName(AZ_CRC("ActiveAssetIds", 0xe445268a));
+                rootDataElementNode.RemoveElementByName(AZ_CRC_CE("ActiveAssetIds"));
                 rootDataElementNode.AddElementWithData(context, "ActiveAssetData", assetSaveData);
             }
 
+            if (rootDataElementNode.GetVersion() < 4)
+            {
+                rootDataElementNode.RemoveElementByName(AZ_CRC_CE("ActiveAssetIds"));
+                rootDataElementNode.RemoveElementByName(AZ_CRC_CE("FocusedAssetId"));
+            }
+
             return true;
         }
 
@@ -135,13 +139,12 @@ namespace ScriptCanvasEditor
             if (serialize)
             {
                 serialize->Class<WorkspaceAssetSaveData>()
-                    ->Version(1)
+                    ->Version(2)
                     ->Field("AssetId", &WorkspaceAssetSaveData::m_assetId)
-                    ->Field("AssetType", &WorkspaceAssetSaveData::m_assetType)
                 ;
 
                 serialize->Class<EditorWorkspace>()
-                    ->Version(3, &EditorWorkspace::VersionConverter)
+                    ->Version(4, &EditorWorkspace::VersionConverter)
                     ->Field("m_storedWindowState", &EditorWorkspace::m_storedWindowState)
                     ->Field("m_windowGeometry", &EditorWorkspace::m_windowGeometry)
                     ->Field("FocusedAssetId", &EditorWorkspace::m_focusedAssetId)
@@ -150,13 +153,13 @@ namespace ScriptCanvasEditor
             }
         }
 
-        void EditorWorkspace::ConfigureActiveAssets(AZ::Data::AssetId focussedAssetId, const AZStd::vector< WorkspaceAssetSaveData >& activeAssetData)
+        void EditorWorkspace::ConfigureActiveAssets(SourceHandle focussedAssetId, const AZStd::vector< WorkspaceAssetSaveData >& activeAssetData)
         {
             m_focusedAssetId = focussedAssetId;
             m_activeAssetData = activeAssetData;
         }
 
-        AZ::Data::AssetId EditorWorkspace::GetFocusedAssetId() const
+        SourceHandle EditorWorkspace::GetFocusedAssetId() const
         {
             return m_focusedAssetId;
         }

Gems/ScriptCanvas/Code/Editor/Settings.h

@@ -11,6 +11,7 @@
 #include <AzCore/Asset/AssetCommon.h>
 #include <AzCore/Math/Uuid.h>
 #include <AzCore/UserSettings/UserSettings.h>
+#include <ScriptCanvas/Core/Core.h>
 
 // qdatastream.h(173): warning C4251: 'QDataStream::d': class 'QScopedPointer<QDataStreamPrivate,QScopedPointerDeleter<T>>' needs to have dll-interface to be used by clients of class 'QDataStream'
 // qwidget.h(858): warning C4800: 'uint': forcing value to bool 'true' or 'false' (performance warning)
@@ -53,11 +54,10 @@ namespace ScriptCanvasEditor
                 AZ_RTTI(WorkspaceAssetSaveData, "{927368CA-096F-4CF1-B2E0-1B9E4A93EA57}");
 
                 WorkspaceAssetSaveData();
-                WorkspaceAssetSaveData(const AZ::Data::AssetId& assetId);
+                WorkspaceAssetSaveData(SourceHandle assetId);
                 virtual ~WorkspaceAssetSaveData() = default;
 
-                AZ::Data::AssetId m_assetId;
-                AZ::Data::AssetType m_assetType;
+                SourceHandle m_assetId;
             };
 
         
@@ -69,9 +69,9 @@ namespace ScriptCanvasEditor
 
             EditorWorkspace() = default;
 
-            void ConfigureActiveAssets(AZ::Data::AssetId focusedAssetId, const AZStd::vector< WorkspaceAssetSaveData >& activeAssetIds);
+            void ConfigureActiveAssets(SourceHandle focusedAsset, const AZStd::vector< WorkspaceAssetSaveData >& activeAssetIds);
             
-            AZ::Data::AssetId GetFocusedAssetId() const;
+            SourceHandle GetFocusedAssetId() const;
             AZStd::vector< WorkspaceAssetSaveData > GetActiveAssetData() const;
 
             void Init(const QByteArray& windowState, const QByteArray& windowGeometry);
@@ -79,7 +79,7 @@ namespace ScriptCanvasEditor
 
             void Clear()
             {
-                m_focusedAssetId.SetInvalid();
+                m_focusedAssetId.Clear();
                 m_activeAssetData.clear();
             }
 
@@ -91,7 +91,7 @@ namespace ScriptCanvasEditor
             AZStd::vector<AZ::u8> m_windowGeometry;
             AZStd::vector<AZ::u8> m_windowState;
 
-            AZ::Data::AssetId m_focusedAssetId;
+            SourceHandle m_focusedAssetId;
             AZStd::vector< WorkspaceAssetSaveData > m_activeAssetData;
 
         };

Gems/ScriptCanvas/Code/Editor/SystemComponent.cpp

@@ -22,6 +22,7 @@
 #include <Editor/SystemComponent.h>
 #include <Editor/View/Dialogs/NewGraphDialog.h>
 #include <Editor/View/Dialogs/SettingsDialog.h>
+#include <Editor/View/Widgets/SourceHandlePropertyAssetCtrl.h>
 #include <Editor/View/Windows/MainWindow.h>
 #include <GraphCanvas/GraphCanvasBus.h>
 #include <LyViewPaneNames.h>
@@ -119,6 +120,10 @@ namespace ScriptCanvasEditor
         PopulateEditorCreatableTypes();
 
         AzToolsFramework::RegisterGenericComboBoxHandler<ScriptCanvas::VariableId>();
+        if (AzToolsFramework::PropertyTypeRegistrationMessages::Bus::FindFirstHandler())
+        {
+            AzToolsFramework::PropertyTypeRegistrationMessages::Bus::Broadcast(&AzToolsFramework::PropertyTypeRegistrationMessages::RegisterPropertyType, aznew SourceHandlePropertyHandler());
+        }
 
         SystemRequestBus::Handler::BusConnect();
         ScriptCanvasExecutionBus::Handler::BusConnect();
@@ -173,13 +178,11 @@ namespace ScriptCanvasEditor
         outCreatableTypes.insert(m_creatableTypes.begin(), m_creatableTypes.end());
     }
 
-    void SystemComponent::CreateEditorComponentsOnEntity(AZ::Entity* entity, const AZ::Data::AssetType& assetType)
+    void SystemComponent::CreateEditorComponentsOnEntity(AZ::Entity* entity, [[maybe_unused]] const AZ::Data::AssetType& assetType)
     {
         if (entity)
         {
             auto graph = entity->CreateComponent<Graph>();
-            graph->SetAssetType(assetType);
-
             entity->CreateComponent<EditorGraphVariableManagerComponent>(graph->GetScriptCanvasId());
         }
     }
@@ -248,23 +251,25 @@ namespace ScriptCanvasEditor
                             {
                                 continue;
                             }
-
+ 
                             entityMenu->setEnabled(true);
-
+ 
                             usedIds.insert(assetId);
-
+ 
                             AZStd::string rootPath;
                             AZ::Data::AssetInfo assetInfo = AssetHelpers::GetAssetInfo(assetId, rootPath);
-
+ 
                             AZStd::string displayName;
                             AZ::StringFunc::Path::GetFileName(assetInfo.m_relativePath.c_str(), displayName);
-
+ 
                             action = entityMenu->addAction(QString("%1").arg(QString(displayName.c_str())));
-
+ 
                             QObject::connect(action, &QAction::triggered, [assetId]
                             {
                                 AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
-                                GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAsset, assetId, -1);
+                                GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAsset
+                                    , SourceHandle(nullptr, assetId.m_guid, "")
+                                    , Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
                             });
                         }
                     }
@@ -301,7 +306,10 @@ namespace ScriptCanvasEditor
         return AzToolsFramework::AssetBrowser::SourceFileDetails();
     }
 
-    void SystemComponent::AddSourceFileOpeners(const char* fullSourceFileName, [[maybe_unused]] const AZ::Uuid& sourceUUID, AzToolsFramework::AssetBrowser::SourceFileOpenerList& openers)
+    void SystemComponent::AddSourceFileOpeners
+        ( [[maybe_unused]] const char* fullSourceFileName
+        , [[maybe_unused]] const AZ::Uuid& sourceUUID
+        , [[maybe_unused]] AzToolsFramework::AssetBrowser::SourceFileOpenerList& openers)
     {
         using namespace AzToolsFramework;
         using namespace AzToolsFramework::AssetBrowser;
@@ -322,14 +330,16 @@ namespace ScriptCanvasEditor
                 if (fullDetails)
                 {
                     AzToolsFramework::OpenViewPane(LyViewPane::ScriptCanvas);
-
+ 
                     AzToolsFramework::EditorRequests::Bus::Broadcast(&AzToolsFramework::EditorRequests::OpenViewPane, "Script Canvas");
-                    GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, sourceUUIDInCall, -1);
+                    GeneralRequestBus::BroadcastResult(openOutcome
+                        , &GeneralRequests::OpenScriptCanvasAsset
+                        , SourceHandle(nullptr, sourceUUIDInCall, ""), Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
                 }
             };
-
+ 
             openers.push_back({ "O3DE_ScriptCanvasEditor", "Open In Script Canvas Editor...", QIcon(), scriptCanvasEditorCallback });
-        }
+         }
     }
 
     void SystemComponent::OnUserSettingsActivated()

Gems/ScriptCanvas/Code/Editor/Undo/ScriptCanvasGraphCommand.cpp

@@ -11,6 +11,7 @@
 #include <AzCore/Serialization/Utils.h>
 
 #include <ScriptCanvas/Core/Graph.h>
+#include <ScriptCanvas/Components/EditorGraph.h>
 #include <ScriptCanvas/Variable/VariableBus.h>
 
 #include <GraphCanvas/Components/SceneBus.h>
@@ -19,7 +20,6 @@
 
 #include <Editor/Include/ScriptCanvas/Bus/EditorScriptCanvasBus.h>
 #include <Editor/Assets/ScriptCanvasAssetTrackerBus.h>
-#include <Editor/Assets/ScriptCanvasMemoryAsset.h>
 
 namespace ScriptCanvasEditor
 {
@@ -36,7 +36,7 @@ namespace ScriptCanvasEditor
     {
     }
 
-    void GraphItemCommand::Capture(ScriptCanvasMemoryAsset&, bool)
+    void GraphItemCommand::Capture(Graph*, bool)
     {
     }
 
@@ -105,10 +105,10 @@ namespace ScriptCanvasEditor
         RestoreItem(m_redoState);
     }
 
-    void GraphItemChangeCommand::Capture(ScriptCanvasMemoryAsset& memoryAsset, bool captureUndo)
+    void GraphItemChangeCommand::Capture(Graph* graph, bool captureUndo)
     {
-        m_scriptCanvasId = memoryAsset.GetScriptCanvasId();
-        m_graphCanvasGraphId = memoryAsset.GetGraphId();
+        m_scriptCanvasId = graph->GetScriptCanvasId();
+        m_graphCanvasGraphId = graph->GetGraphCanvasGraphId();
 
         UndoCache* undoCache = nullptr;
         UndoRequestBus::EventResult(undoCache, m_scriptCanvasId, &UndoRequests::GetSceneUndoCache);
@@ -204,9 +204,9 @@ namespace ScriptCanvasEditor
         RestoreItem(m_redoState);
     }
 
-    void GraphItemAddCommand::Capture(ScriptCanvasMemoryAsset& memoryAsset, bool)
+    void GraphItemAddCommand::Capture(Graph* graph, bool)
     {
-        GraphItemChangeCommand::Capture(memoryAsset, false);
+        GraphItemChangeCommand::Capture(graph, false);
     }
 
     //// Graph Item Removal Command
@@ -225,8 +225,8 @@ namespace ScriptCanvasEditor
         RestoreItem(m_redoState);
     }
 
-    void GraphItemRemovalCommand::Capture(ScriptCanvasMemoryAsset& memoryAsset, bool)
+    void GraphItemRemovalCommand::Capture(Graph* graph, bool)
     {
-        GraphItemChangeCommand::Capture(memoryAsset, true);
+        GraphItemChangeCommand::Capture(graph, true);
     }
 }

Gems/ScriptCanvas/Code/Editor/Undo/ScriptCanvasGraphCommand.h

@@ -46,7 +46,7 @@ namespace ScriptCanvasEditor
         void Undo() override;
         void Redo() override;
 
-        virtual void Capture(ScriptCanvasMemoryAsset& memoryAsset, bool captureUndo);
+        virtual void Capture(Graph* graph, bool captureUndo);
 
         bool Changed() const override;
 
@@ -76,7 +76,7 @@ namespace ScriptCanvasEditor
 
         void Undo() override;
         void Redo() override;
-        void Capture(ScriptCanvasMemoryAsset& memoryAsset, bool captureUndo) override;
+        void Capture(Graph* graph, bool captureUndo) override;
 
         void RestoreItem(const AZStd::vector<AZ::u8>& restoreBuffer) override;
 
@@ -103,7 +103,7 @@ namespace ScriptCanvasEditor
         void Undo() override;
         void Redo() override;
 
-        void Capture(ScriptCanvasMemoryAsset& memoryAsset, bool captureUndo) override;
+        void Capture(Graph* graph, bool captureUndo) override;
 
     protected:
         GraphItemAddCommand(const GraphItemAddCommand&) = delete;
@@ -124,7 +124,7 @@ namespace ScriptCanvasEditor
         void Undo() override;
         void Redo() override;
 
-        void Capture(ScriptCanvasMemoryAsset& memoryAsset, bool captureUndo) override;
+        void Capture(Graph* graph, bool captureUndo) override;
 
     protected:
         GraphItemRemovalCommand(const GraphItemRemovalCommand&) = delete;

Gems/ScriptCanvas/Code/Editor/Undo/ScriptCanvasUndoManager.cpp

@@ -28,9 +28,9 @@ namespace ScriptCanvasEditor
     // SceneUndoState
 
     SceneUndoState::SceneUndoState(AzToolsFramework::UndoSystem::IUndoNotify* undoNotify)
-        : m_undoStack(AZStd::make_unique<AzToolsFramework::UndoSystem::UndoStack>(c_undoLimit, undoNotify))
-        , m_undoCache(AZStd::make_unique<UndoCache>())
     {
+        m_undoStack = AZStd::make_unique<AzToolsFramework::UndoSystem::UndoStack>(c_undoLimit, undoNotify);
+        m_undoCache = AZStd::make_unique<UndoCache>();
     }
 
     void SceneUndoState::BeginUndoBatch(AZStd::string_view label)

Gems/ScriptCanvas/Code/Editor/Undo/ScriptCanvasUndoManager.h

@@ -61,6 +61,7 @@ namespace ScriptCanvasEditor
     public:
         AZ_CLASS_ALLOCATOR(SceneUndoState, AZ::SystemAllocator, 0);
 
+        SceneUndoState() = default;
         SceneUndoState(AzToolsFramework::UndoSystem::IUndoNotify* undoNotify);
         ~SceneUndoState();
 

Gems/ScriptCanvas/Code/Editor/Utilities/RecentAssetPath.cpp

@@ -15,7 +15,7 @@
 
 namespace ScriptCanvasEditor
 {
-    AZ::Data::AssetId ReadRecentAssetId()
+    SourceHandle ReadRecentAssetId()
     {
         QSettings settings(QSettings::IniFormat, QSettings::UserScope, 
             SCRIPTCANVASEDITOR_AZ_QCOREAPPLICATION_SETTINGS_ORGANIZATION_NAME);
@@ -26,20 +26,15 @@ namespace ScriptCanvasEditor
         recentOpenFileLocation = settings.value(SCRIPTCANVASEDITOR_SETTINGS_RECENT_OPEN_FILE_LOCATION_KEY).toString();
         settings.endGroup();
 
-        if (recentOpenFileLocation.isEmpty())
-        {
-            return {};
-        }
-        AZ::Data::AssetId assetId(recentOpenFileLocation.toUtf8().constData());
-        return assetId;
+        return { nullptr, {}, recentOpenFileLocation.toUtf8().constData() };
     }
 
-    void SetRecentAssetId(const AZ::Data::AssetId& assetId)
+    void SetRecentAssetId(SourceHandle assetId)
     {
         QSettings settings(QSettings::IniFormat, QSettings::UserScope, 
             SCRIPTCANVASEDITOR_AZ_QCOREAPPLICATION_SETTINGS_ORGANIZATION_NAME);
 
-        AZStd::string guidStr = assetId.m_guid.ToString<AZStd::string>();
+        AZStd::string guidStr = assetId.Id().ToString<AZStd::string>();
 
         settings.beginGroup(SCRIPTCANVASEDITOR_NAME_SHORT);
         settings.setValue(SCRIPTCANVASEDITOR_SETTINGS_RECENT_OPEN_FILE_LOCATION_KEY, 

Gems/ScriptCanvas/Code/Editor/Utilities/RecentAssetPath.h

@@ -8,10 +8,11 @@
 #pragma once
 
 #include <AzCore/Asset/AssetCommon.h>
+#include <ScriptCanvas/Core/Core.h>
 
 namespace ScriptCanvasEditor
 {
-    AZ::Data::AssetId ReadRecentAssetId();
-    void SetRecentAssetId(const AZ::Data::AssetId& assetId);
+    SourceHandle ReadRecentAssetId();
+    void SetRecentAssetId(SourceHandle assetId);
     void ClearRecentAssetId();
 }

Gems/ScriptCanvas/Code/Editor/View/Widgets/AssetGraphSceneDataBus.h

@@ -11,14 +11,16 @@
 #include <AzCore/Asset/AssetCommon.h>
 #include <AzCore/Math/Uuid.h>
 #include <AzCore/EBus/EBus.h>
+#include <Core/Core.h>
 
 namespace ScriptCanvasEditor
 {
+    // #sc-editor-asset remove this
     class AssetGraphScene : public AZ::EBusTraits
     {
     public:
-        virtual AZ::EntityId FindEditorNodeIdByAssetNodeId(const AZ::Data::AssetId& assetId, AZ::EntityId assetNodeId) const = 0;
-        virtual AZ::EntityId FindAssetNodeIdByEditorNodeId(const AZ::Data::AssetId& assetId, AZ::EntityId editorNodeId) const = 0;
+        virtual AZ::EntityId FindEditorNodeIdByAssetNodeId(const SourceHandle& assetId, AZ::EntityId assetNodeId) const = 0;
+        virtual AZ::EntityId FindAssetNodeIdByEditorNodeId(const SourceHandle& assetId, AZ::EntityId editorNodeId) const = 0;
     };
 
     using AssetGraphSceneBus = AZ::EBus<AssetGraphScene>;

Gems/ScriptCanvas/Code/Editor/View/Widgets/CanvasWidget.cpp

@@ -36,7 +36,7 @@ namespace ScriptCanvasEditor
 {
     namespace Widget
     {
-        CanvasWidget::CanvasWidget(const AZ::Data::AssetId& assetId, QWidget* parent)
+        CanvasWidget::CanvasWidget(const ScriptCanvasEditor::SourceHandle& assetId, QWidget* parent)
             : QWidget(parent)
             , ui(new Ui::CanvasWidget())
             , m_attached(false)
@@ -69,25 +69,15 @@ namespace ScriptCanvasEditor
         void CanvasWidget::ShowScene(const ScriptCanvas::ScriptCanvasId& scriptCanvasId)
         {
             EditorGraphRequests* editorGraphRequests = EditorGraphRequestBus::FindFirstHandler(scriptCanvasId);
-
-            editorGraphRequests->SetAssetId(m_assetId);
             editorGraphRequests->CreateGraphCanvasScene();
-
             AZ::EntityId graphCanvasSceneId = editorGraphRequests->GetGraphCanvasGraphId();
-
             m_graphicsView->SetScene(graphCanvasSceneId);
-
             m_scriptCanvasId = scriptCanvasId;
         }
 
-        void CanvasWidget::SetAssetId(const AZ::Data::AssetId& assetId)
+        void CanvasWidget::SetAssetId(const ScriptCanvasEditor::SourceHandle& assetId)
         {
             m_assetId = assetId;
-
-            if (EditorGraphRequests* editorGraphRequests = EditorGraphRequestBus::FindFirstHandler(m_scriptCanvasId))
-            {
-                editorGraphRequests->SetAssetId(m_assetId);
-            }
         }
 
         const GraphCanvas::ViewId& CanvasWidget::GetViewId() const

Gems/ScriptCanvas/Code/Editor/View/Widgets/CanvasWidget.h

@@ -21,6 +21,7 @@ AZ_POP_DISABLE_WARNING
 #include <AzCore/Asset/AssetCommon.h>
 
 #include <GraphCanvas/Components/ViewBus.h>
+#include <ScriptCanvas/Core/Core.h>
 #endif
 
 class QVBoxLayout;
@@ -46,13 +47,13 @@ namespace ScriptCanvasEditor
             Q_OBJECT
         public:
             AZ_CLASS_ALLOCATOR(CanvasWidget, AZ::SystemAllocator, 0);
-            CanvasWidget(const AZ::Data::AssetId& assetId, QWidget* parent = nullptr);
+            CanvasWidget(const ScriptCanvasEditor::SourceHandle& assetId, QWidget* parent = nullptr);
             ~CanvasWidget() override;
 
             void SetDefaultBorderColor(AZ::Color defaultBorderColor);
             void ShowScene(const ScriptCanvas::ScriptCanvasId& scriptCanvasId);
 
-            void SetAssetId(const AZ::Data::AssetId& assetId);
+            void SetAssetId(const ScriptCanvasEditor::SourceHandle& assetId);
 
             const GraphCanvas::ViewId& GetViewId() const;
 
@@ -69,7 +70,7 @@ namespace ScriptCanvasEditor
 
             void SetupGraphicsView();
             
-            AZ::Data::AssetId m_assetId;
+            ScriptCanvasEditor::SourceHandle m_assetId;
 
             AZStd::unique_ptr<Ui::CanvasWidget> ui;
 

Gems/ScriptCanvas/Code/Editor/View/Widgets/GraphTabBar.cpp

@@ -23,6 +23,8 @@
 
 #include <ScriptCanvas/Asset/AssetDescription.h>
 
+#include <Editor/Include/ScriptCanvas/Components/EditorGraph.h>
+
 namespace ScriptCanvasEditor
 {
     namespace Widget
@@ -31,7 +33,7 @@ namespace ScriptCanvasEditor
         // GraphTabBar
         ////////////////
 
-        GraphTabBar::GraphTabBar(QWidget* parent /*= nullptr*/)
+        GraphTabBar::GraphTabBar(QWidget* parent)
             : AzQtComponents::TabBar(parent)
         {
             setTabsClosable(true);
@@ -44,49 +46,128 @@ namespace ScriptCanvasEditor
             connect(this, &QTabBar::customContextMenuRequested, this, &GraphTabBar::OnContextMenu);
         }
 
-        void GraphTabBar::AddGraphTab(const AZ::Data::AssetId& assetId)
+        void GraphTabBar::AddGraphTab(ScriptCanvasEditor::SourceHandle assetId, Tracker::ScriptCanvasFileState fileState)
         {
-            InsertGraphTab(count(), assetId);
+            InsertGraphTab(count(), assetId, fileState);
         }
 
-        int GraphTabBar::InsertGraphTab(int tabIndex, const AZ::Data::AssetId& assetId)
+        void GraphTabBar::ClearTabView(int tabIndex)
+        {
+            if (tabIndex < count())
+            {
+                if (QVariant tabDataVariant = tabData(tabIndex); tabDataVariant.isValid())
+                {
+                    GraphTabMetadata replacement = tabDataVariant.value<GraphTabMetadata>();
+                    if (replacement.m_canvasWidget)
+                    {
+                        delete replacement.m_canvasWidget;
+                        replacement.m_canvasWidget = nullptr;
+                        tabDataVariant.setValue(replacement);
+                        setTabData(tabIndex, tabDataVariant);
+                    }
+                }
+            }
+        }
+
+        CanvasWidget* GraphTabBar::ModOrCreateTabView(int tabIndex)
+        {
+            if (tabIndex < count())
+            {
+                if (QVariant tabDataVariant = tabData(tabIndex); tabDataVariant.isValid())
+                {
+                    if (!tabDataVariant.value<GraphTabMetadata>().m_canvasWidget)
+                    {
+                        CanvasWidget* canvasWidget = new CanvasWidget(tabDataVariant.value<GraphTabMetadata>().m_assetId, this);
+                        canvasWidget->SetDefaultBorderColor(ScriptCanvasAssetDescription().GetDisplayColorImpl());
+                        GraphTabMetadata replacement = tabDataVariant.value<GraphTabMetadata>();
+                        replacement.m_canvasWidget = canvasWidget;
+                        tabDataVariant.setValue(replacement);
+                        setTabData(tabIndex, tabDataVariant);
+                    }
+
+                    return tabDataVariant.value<GraphTabMetadata>().m_canvasWidget;
+                }
+            }
+
+            return nullptr;
+        }
+
+        CanvasWidget* GraphTabBar::ModTabView(int tabIndex)
+        {
+            if (tabIndex < count())
+            {
+                if (QVariant tabDataVariant = tabData(tabIndex); tabDataVariant.isValid())
+                {
+                    return tabDataVariant.value<GraphTabMetadata>().m_canvasWidget;
+                }
+            }
+
+            return nullptr;
+        }
+
+        AZStd::optional<GraphTabMetadata> GraphTabBar::GetTabData(int tabIndex) const
+        {
+            if (tabIndex < count())
+            {
+                if (QVariant tabDataVariant = tabData(tabIndex); tabDataVariant.isValid())
+                {
+                    return tabDataVariant.value<GraphTabMetadata>();
+                }
+            }
+
+            return AZStd::nullopt;
+        }
+
+        AZStd::optional<GraphTabMetadata> GraphTabBar::GetTabData(ScriptCanvasEditor::SourceHandle assetId) const
+        {
+            return GetTabData(FindTab(assetId));
+        }
+
+        void GraphTabBar::SetTabData(const GraphTabMetadata& metadata, int tabIndex)
+        {
+            if (tabIndex < count())
+            {
+                setTabData(tabIndex, QVariant::fromValue(metadata));
+            }
+        }
+
+        void GraphTabBar::SetTabData(const GraphTabMetadata& metadata, ScriptCanvasEditor::SourceHandle assetId)
+        {
+            auto index = FindTab(assetId);
+            auto replacement = GetTabData(assetId);
+
+            if (index >= 0 && replacement)
+            {
+                replacement->m_assetId = assetId;
+                SetTabData(metadata, index);
+            }
+        }
+
+        int GraphTabBar::InsertGraphTab(int tabIndex, ScriptCanvasEditor::SourceHandle assetId, Tracker::ScriptCanvasFileState fileState)
         {
             if (!SelectTab(assetId))
             {
-                AZStd::shared_ptr<ScriptCanvasMemoryAsset> memoryAsset;
-                AssetTrackerRequestBus::BroadcastResult(memoryAsset, &AssetTrackerRequests::GetAsset, assetId);
+                QIcon tabIcon = QIcon(ScriptCanvasAssetDescription().GetIconPathImpl());
+                tabIndex = qobject_cast<AzQtComponents::TabWidget*>(parent())->insertTab(tabIndex, new QWidget(), tabIcon, "");
+                GraphTabMetadata metaData;
+                CanvasWidget* canvasWidget = new CanvasWidget(assetId, this);
+                canvasWidget->SetDefaultBorderColor(ScriptCanvasAssetDescription().GetDisplayColorImpl());
+                metaData.m_canvasWidget = canvasWidget;
+                metaData.m_assetId = assetId;
+                metaData.m_fileState = fileState;
+                
+                AZStd::string tabName;
+                AzFramework::StringFunc::Path::GetFileName(assetId.Path().c_str(), tabName);
 
-                if (memoryAsset)
-                {
-                    ScriptCanvas::AssetDescription assetDescription = memoryAsset->GetAsset().Get()->GetAssetDescription();
-
-                    QIcon tabIcon = QIcon(assetDescription.GetIconPathImpl());
-                    int newTabIndex = qobject_cast<AzQtComponents::TabWidget*>(parent())->insertTab(tabIndex, new QWidget(), tabIcon, "");
-
-                    CanvasWidget* canvasWidget = memoryAsset->CreateView(this);
-
-                    canvasWidget->SetDefaultBorderColor(assetDescription.GetDisplayColorImpl());
-
-                    AZStd::string tabName;
-                    AzFramework::StringFunc::Path::GetFileName(memoryAsset->GetAbsolutePath().c_str(), tabName);
-
-                    ConfigureTab(newTabIndex, assetId, tabName);
-
-                    // new graphs will need to use their in-memory assetid which we'll need to update 
-                    // upon saving the asset
-                    if (!memoryAsset->GetFileAssetId().IsValid())
-                    {
-                        setTabData(newTabIndex, QVariant::fromValue(memoryAsset->GetId()));
-                    }
-
-                    return newTabIndex;
-                }
+                SetTabText(tabIndex, tabName.c_str(), fileState);
+                setTabData(tabIndex, QVariant::fromValue(metaData));
+                return tabIndex;
             }
 
             return -1;
         }
 
-        bool GraphTabBar::SelectTab(const AZ::Data::AssetId& assetId)
+        bool GraphTabBar::SelectTab(ScriptCanvasEditor::SourceHandle assetId)
         {
             int tabIndex = FindTab(assetId);
             if (-1 != tabIndex)
@@ -94,74 +175,119 @@ namespace ScriptCanvasEditor
                 setCurrentIndex(tabIndex);
                 return true;
             }
+
             return false;
         }
 
-        void GraphTabBar::ConfigureTab(int tabIndex, AZ::Data::AssetId fileAssetId, const AZStd::string& tabName)
-        {
-            if (fileAssetId.IsValid())
-            {
-                QVariant tabDataVariant = tabData(tabIndex);
-
-                if (tabDataVariant.isValid())
-                {
-                    auto tabAssetId = tabDataVariant.value<AZ::Data::AssetId>();
-                    MemoryAssetNotificationBus::MultiHandler::BusDisconnect(tabAssetId);
-                }
-            
-                setTabData(tabIndex, QVariant::fromValue(fileAssetId));
-
-                MemoryAssetNotificationBus::MultiHandler::BusConnect(fileAssetId);
-            }
-
-            Tracker::ScriptCanvasFileState fileState = Tracker::ScriptCanvasFileState::INVALID;
-            AssetTrackerRequestBus::BroadcastResult(fileState, &AssetTrackerRequests::GetFileState, fileAssetId);
-
-            SetTabText(tabIndex, tabName.c_str(), fileState);
-        }
-
-        int GraphTabBar::FindTab(const AZ::Data::AssetId& assetId) const
+        int GraphTabBar::FindTab(ScriptCanvasEditor::SourceHandle assetId) const
         {
             for (int tabIndex = 0; tabIndex < count(); ++tabIndex)
             {
                 QVariant tabDataVariant = tabData(tabIndex);
                 if (tabDataVariant.isValid())
                 {
-                    auto tabAssetId = tabDataVariant.value<AZ::Data::AssetId>();
-                    if (tabAssetId == assetId)
+                    auto tabAssetId = tabDataVariant.value<GraphTabMetadata>(); 
+                    if (tabAssetId.m_assetId.AnyEquals(assetId))
                     {
                         return tabIndex;
                     }
                 }
             }
+
             return -1;
         }
 
-        AZ::Data::AssetId GraphTabBar::FindAssetId(int tabIndex)
+        int GraphTabBar::FindTab(ScriptCanvasEditor::GraphPtrConst graph) const
+        {
+            for (int tabIndex = 0; tabIndex < count(); ++tabIndex)
+            {
+                QVariant tabDataVariant = tabData(tabIndex);
+                if (tabDataVariant.isValid())
+                {
+                    auto tabAssetId = tabDataVariant.value<GraphTabMetadata>();
+                    if (tabAssetId.m_assetId.Get() == graph)
+                    {
+                        return tabIndex;
+                    }
+                }
+            }
+
+            return -1;
+        }
+
+        int GraphTabBar::FindSaveOverMatch(ScriptCanvasEditor::SourceHandle assetId) const
+        {
+            for (int tabIndex = 0; tabIndex < count(); ++tabIndex)
+            {
+                QVariant tabDataVariant = tabData(tabIndex);
+                if (tabDataVariant.isValid())
+                {
+                    auto tabAssetId = tabDataVariant.value<GraphTabMetadata>();
+                    if (tabAssetId.m_assetId.Get() != assetId.Get() && tabAssetId.m_assetId.PathEquals(assetId))
+                    {
+                        return tabIndex;
+                    }
+                }
+            }
+
+            return -1;
+        }
+
+        ScriptCanvasEditor::SourceHandle GraphTabBar::FindTabByPath(AZStd::string_view path) const
+        {
+            ScriptCanvasEditor::SourceHandle candidate(nullptr, {}, path);
+
+            for (int index = 0; index < count(); ++index)
+            {
+                QVariant tabdata = tabData(index);
+                if (tabdata.isValid())
+                {
+                    auto tabAssetId = tabdata.value<GraphTabMetadata>();
+                    if (tabAssetId.m_assetId.AnyEquals(candidate))
+                    {
+                        return tabAssetId.m_assetId;
+                    }
+                }
+            }
+
+            return {};
+        }
+
+        ScriptCanvasEditor::SourceHandle GraphTabBar::FindAssetId(int tabIndex)
         {
             QVariant dataVariant = tabData(tabIndex);
             if (dataVariant.isValid())
             {
-                auto tabAssetId = dataVariant.value<AZ::Data::AssetId>();
-                return tabAssetId;
+                auto tabAssetId = dataVariant.value<GraphTabMetadata>();
+                return tabAssetId.m_assetId;
             }
 
-            return AZ::Data::AssetId();
+            return ScriptCanvasEditor::SourceHandle();
+        }
+
+        ScriptCanvas::ScriptCanvasId GraphTabBar::FindScriptCanvasIdFromGraphCanvasId(const GraphCanvas::GraphId& graphCanvasGraphId) const
+        {
+            for (int index = 0; index < count(); ++index)
+            {
+                QVariant tabdata = tabData(index);
+                if (tabdata.isValid())
+                {
+                    auto tabAssetId = tabdata.value<GraphTabMetadata>();
+                    if (tabAssetId.m_assetId.IsGraphValid()
+                    && tabAssetId.m_assetId.Get()->GetGraphCanvasGraphId() == graphCanvasGraphId)
+                    {
+                        return tabAssetId.m_assetId.Get()->GetScriptCanvasId();
+                    }
+                }
+            }
+
+            return ScriptCanvas::ScriptCanvasId{};
         }
 
         void GraphTabBar::CloseTab(int index)
         {
             if (index >= 0 && index < count())
             {
-                QVariant tabdata = tabData(index);
-                if (tabdata.isValid())
-                {
-                    auto tabAssetId = tabdata.value<AZ::Data::AssetId>();
-
-                    MemoryAssetNotificationBus::MultiHandler::BusDisconnect(tabAssetId);
-                    AssetTrackerRequestBus::Broadcast(&AssetTrackerRequests::ClearView, tabAssetId);
-                }
-
                 qobject_cast<AzQtComponents::TabWidget*>(parent())->removeTab(index);
             }
         }
@@ -172,8 +298,6 @@ namespace ScriptCanvasEditor
             {
                 Q_EMIT TabCloseNoButton(i);
             }
-
-            MemoryAssetNotificationBus::MultiHandler::BusDisconnect();
         }
 
         void GraphTabBar::OnContextMenu(const QPoint& point)
@@ -187,11 +311,9 @@ namespace ScriptCanvasEditor
             QVariant tabdata = tabData(tabIndex);
             if (tabdata.isValid())
             {
-                auto tabAssetId = tabdata.value<AZ::Data::AssetId>();
-
-                Tracker::ScriptCanvasFileState fileState;
-                AssetTrackerRequestBus::BroadcastResult(fileState , &AssetTrackerRequests::GetFileState, tabAssetId);
+                auto tabAssetId = tabdata.value<GraphTabMetadata>();
 
+                Tracker::ScriptCanvasFileState fileState = Tracker::ScriptCanvasFileState::INVALID;
                 isModified = fileState == Tracker::ScriptCanvasFileState::NEW || fileState == Tracker::ScriptCanvasFileState::MODIFIED;
             }
 
@@ -263,23 +385,14 @@ namespace ScriptCanvasEditor
             AzQtComponents::TabBar::mouseReleaseEvent(event);
         }
 
-        void GraphTabBar::OnFileStateChanged(Tracker::ScriptCanvasFileState fileState)
-        {
-            const AZ::Data::AssetId* fileAssetId = MemoryAssetNotificationBus::GetCurrentBusId();
-
-            if (fileAssetId)
-            {
-                SetFileState((*fileAssetId), fileState);
-
-                if (FindTab((*fileAssetId)) == currentIndex())
-                {
-                    Q_EMIT OnActiveFileStateChanged();
-                }
-            }
-        }
-
         void GraphTabBar::SetTabText(int tabIndex, const QString& path, Tracker::ScriptCanvasFileState fileState)
         {
+            QString safePath = path;
+            if (path.endsWith("^") || path.endsWith("*"))
+            {
+                safePath.chop(1);
+            }
+
             if (tabIndex >= 0 && tabIndex < count())
             {
                 const char* fileStateTag = "";
@@ -296,7 +409,7 @@ namespace ScriptCanvasEditor
                     break;
                 }
 
-                setTabText(tabIndex, QString("%1%2").arg(path).arg(fileStateTag));
+                setTabText(tabIndex, QString("%1%2").arg(safePath).arg(fileStateTag));
             }
         }
 
@@ -314,6 +427,23 @@ namespace ScriptCanvasEditor
             Q_EMIT TabRemoved(index);
         }
 
+        void GraphTabBar::UpdateFileState(const ScriptCanvasEditor::SourceHandle& assetId, Tracker::ScriptCanvasFileState fileState)
+        {
+            auto tabData = GetTabData(assetId);
+            if (tabData && tabData->m_fileState != fileState)
+            {
+                int index = FindTab(assetId);
+                tabData->m_fileState = fileState;
+                SetTabData(*tabData, assetId);
+                SetTabText(index, tabText(index), fileState);
+
+                if (index == currentIndex())
+                {
+                    Q_EMIT OnActiveFileStateChanged();
+                }
+            }
+        }
+
         void GraphTabBar::currentChangedTab(int index)
         {
             if (index < 0)
@@ -327,7 +457,7 @@ namespace ScriptCanvasEditor
                 return;
             }
 
-            auto assetId = tabdata.value<AZ::Data::AssetId>();
+            auto assetId = tabdata.value<GraphTabMetadata>().m_assetId;
 
             ScriptCanvasEditor::GeneralRequestBus::Broadcast(&ScriptCanvasEditor::GeneralRequests::OnChangeActiveGraphTab, assetId);
 
@@ -338,24 +468,6 @@ namespace ScriptCanvasEditor
             }
         }
 
-        void GraphTabBar::SetFileState(AZ::Data::AssetId assetId, Tracker::ScriptCanvasFileState fileState)
-        {
-            int index = FindTab(assetId);
-
-            if (index >= 0 && index < count())
-            {
-                QVariant tabdata = tabData(index);
-                if (tabdata.isValid())
-                {
-                    auto tabAssetId = tabdata.value<AZ::Data::AssetId>();
-
-                    AZStd::string tabName;
-                    AssetTrackerRequestBus::BroadcastResult(tabName, &AssetTrackerRequests::GetTabName, tabAssetId);
-                    SetTabText(index, tabName.c_str(), fileState);
-                }
-            }
-        }
-
         #include <Editor/View/Widgets/moc_GraphTabBar.cpp>
     }
 }

Gems/ScriptCanvas/Code/Editor/View/Widgets/GraphTabBar.h

@@ -16,7 +16,10 @@
 #include <AzCore/Component/EntityId.h>
 #include <AzCore/Asset/AssetCommon.h>
 
+#include <ScriptCanvas/Core/Core.h>
 #include <Editor/Assets/ScriptCanvasAssetTracker.h>
+#include <ScriptCanvas/Bus/RequestBus.h>
+
 #endif
 
 class QGraphicsView;
@@ -26,17 +29,18 @@ namespace ScriptCanvasEditor
 {
     namespace Widget
     {
+        class CanvasWidget;
+
         struct GraphTabMetadata
         {
-            AZ::Data::AssetId m_assetId;
+            SourceHandle m_assetId;
             QWidget* m_hostWidget = nullptr;
-            QString m_tabName;
+            CanvasWidget* m_canvasWidget = nullptr;
             Tracker::ScriptCanvasFileState m_fileState = Tracker::ScriptCanvasFileState::INVALID;
         };
 
         class GraphTabBar
             : public AzQtComponents::TabBar
-            , public MemoryAssetNotificationBus::MultiHandler
         {
             Q_OBJECT
 
@@ -45,30 +49,39 @@ namespace ScriptCanvasEditor
             GraphTabBar(QWidget* parent = nullptr);
             ~GraphTabBar() override = default;
 
-            void AddGraphTab(const AZ::Data::AssetId& assetId);
-            int InsertGraphTab(int tabIndex, const AZ::Data::AssetId& assetId);
-            bool SelectTab(const AZ::Data::AssetId& assetId);
-
-            void ConfigureTab(int tabIndex, AZ::Data::AssetId fileAssetId, const AZStd::string& tabName);
-
-            int FindTab(const AZ::Data::AssetId& assetId) const;
-            AZ::Data::AssetId FindAssetId(int tabIndex);
+            AZStd::optional<GraphTabMetadata> GetTabData(int index) const;
+            AZStd::optional<GraphTabMetadata> GetTabData(ScriptCanvasEditor::SourceHandle assetId) const;
+            void SetTabData(const GraphTabMetadata& data, int index);
+            void SetTabData(const GraphTabMetadata& data, ScriptCanvasEditor::SourceHandle assetId);
 
+            void AddGraphTab(ScriptCanvasEditor::SourceHandle assetId, Tracker::ScriptCanvasFileState fileState);
             void CloseTab(int index);
             void CloseAllTabs();
 
+            int InsertGraphTab(int tabIndex, ScriptCanvasEditor::SourceHandle assetId, Tracker::ScriptCanvasFileState fileState);
+            bool SelectTab(ScriptCanvasEditor::SourceHandle assetId);
+
+            int FindTab(ScriptCanvasEditor::SourceHandle assetId) const;
+            int FindTab(ScriptCanvasEditor::GraphPtrConst graph) const;
+            int FindSaveOverMatch(ScriptCanvasEditor::SourceHandle assetId) const;
+            ScriptCanvasEditor::SourceHandle FindTabByPath(AZStd::string_view path) const;
+            ScriptCanvasEditor::SourceHandle FindAssetId(int tabIndex);
+            ScriptCanvas::ScriptCanvasId FindScriptCanvasIdFromGraphCanvasId(const GraphCanvas::GraphId& graphCanvasGraphId) const;
+
+            void ClearTabView(int tabIndex);
+            CanvasWidget* ModOrCreateTabView(int tabIndex);
+            CanvasWidget* ModTabView(int tabIndex);
+
             void OnContextMenu(const QPoint& point);
 
             void mouseReleaseEvent(QMouseEvent* event) override;
 
-            // MemoryAssetNotifications
-            void OnFileStateChanged(Tracker::ScriptCanvasFileState fileState) override;
-            ////
-
             // Updates the tab at the supplied index with the GraphTabMetadata
             // The host widget field of the tabMetadata is not used and will not overwrite the tab data
             void SetTabText(int tabIndex, const QString& path, Tracker::ScriptCanvasFileState fileState = Tracker::ScriptCanvasFileState::INVALID);
 
+            void UpdateFileState(const ScriptCanvasEditor::SourceHandle& assetId, Tracker::ScriptCanvasFileState fileState);
+
         Q_SIGNALS:
             void TabInserted(int index);
             void TabRemoved(int index);
@@ -92,8 +105,6 @@ namespace ScriptCanvasEditor
             // Called when the selected tab changes
             void currentChangedTab(int index);
             
-            void SetFileState(AZ::Data::AssetId assetId, Tracker::ScriptCanvasFileState fileState);
-
             int m_signalSaveOnChangeTo = -1;
         };
     }

Gems/ScriptCanvas/Code/Editor/View/Widgets/LoggingPanel/LoggingWindowSession.cpp

@@ -256,7 +256,8 @@ namespace ScriptCanvasEditor
 
                 const AZ::Data::AssetId& assetId = executionItem->GetAssetId();
                 
-                GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId, assetId);
+                GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId
+                    , SourceHandle(nullptr, assetId.m_guid, {}), Tracker::ScriptCanvasFileState::UNMODIFIED);
             }
         }
     }
@@ -270,12 +271,14 @@ namespace ScriptCanvasEditor
             const AZ::Data::AssetId& assetId = executionItem->GetAssetId();
 
             bool isAssetOpen = false;
-            GeneralRequestBus::BroadcastResult(isAssetOpen, &GeneralRequests::IsScriptCanvasAssetOpen, assetId);
+            GeneralRequestBus::BroadcastResult(isAssetOpen, &GeneralRequests::IsScriptCanvasAssetOpen, SourceHandle(nullptr, assetId.m_guid, {}));
 
-            GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId, assetId);
+            GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId
+                , SourceHandle(nullptr, assetId.m_guid, {}), Tracker::ScriptCanvasFileState::UNMODIFIED);
 
             AZ::EntityId graphCanvasGraphId;
-            GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, assetId);
+            GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId
+                , SourceHandle(nullptr, assetId.m_guid, {}));
             
             if (isAssetOpen)
             {
@@ -348,7 +351,7 @@ namespace ScriptCanvasEditor
         GeneralRequestBus::BroadcastResult(activeGraphCanvasGraphId, &GeneralRequests::GetActiveGraphCanvasGraphId);
 
         AZ::EntityId graphCanvasGraphId;
-        GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, m_assetId);
+        GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, SourceHandle(nullptr, m_assetId.m_guid, {}));
 
         if (activeGraphCanvasGraphId == graphCanvasGraphId)
         {
@@ -366,7 +369,7 @@ namespace ScriptCanvasEditor
         GraphCanvas::FocusConfig focusConfig;
 
         AZ::EntityId scriptCanvasNodeId;
-        AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, assetId, assetNodeId);
+        AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, SourceHandle(nullptr, assetId.m_guid, {}), assetNodeId);
 
         GraphCanvas::NodeId graphCanvasNodeId;
         SceneMemberMappingRequestBus::EventResult(graphCanvasNodeId, scriptCanvasNodeId, &SceneMemberMappingRequests::GetGraphCanvasEntityId);
@@ -403,12 +406,12 @@ namespace ScriptCanvasEditor
     void LoggingWindowSession::HighlightElement(const AZ::Data::AssetId& assetId, const AZ::EntityId& assetNodeId)
     {
         AZ::EntityId graphCanvasGraphId;
-        GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, assetId);
+        GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, SourceHandle(nullptr, assetId.m_guid, {}));
 
         if (graphCanvasGraphId.IsValid())
         {
             AZ::EntityId scriptCanvasNodeId;
-            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, assetId, assetNodeId);
+            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, SourceHandle(nullptr, assetId.m_guid, {}), assetNodeId);
 
             GraphCanvas::NodeId graphCanvasNodeId;
             SceneMemberMappingRequestBus::EventResult(graphCanvasNodeId, scriptCanvasNodeId, &SceneMemberMappingRequests::GetGraphCanvasEntityId);
@@ -447,7 +450,7 @@ namespace ScriptCanvasEditor
         if (effectIter != m_highlightEffects.end())
         {
             AZ::EntityId graphCanvasGraphId;
-            GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, assetId);
+            GeneralRequestBus::BroadcastResult(graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, SourceHandle(nullptr, assetId.m_guid, {}));
 
             if (graphCanvasGraphId.IsValid())
             {

Gems/ScriptCanvas/Code/Editor/View/Widgets/LoggingPanel/LoggingWindowTreeItems.cpp

@@ -122,7 +122,11 @@ namespace ScriptCanvasEditor
     {
     }
 
-    ExecutionLogTreeItem* DebugLogRootItem::CreateExecutionItem(const LoggingDataId& loggingDataId, const ScriptCanvas::NodeTypeIdentifier& nodeType, const ScriptCanvas::GraphInfo& graphInfo, const ScriptCanvas::NamedNodeId& nodeId)
+    ExecutionLogTreeItem* DebugLogRootItem::CreateExecutionItem
+        ( [[maybe_unused]] const LoggingDataId& loggingDataId
+        , [[maybe_unused]] const ScriptCanvas::NodeTypeIdentifier& nodeType
+        , [[maybe_unused]] const ScriptCanvas::GraphInfo& graphInfo
+        , [[maybe_unused]] const ScriptCanvas::NamedNodeId& nodeId)
     {
         ExecutionLogTreeItem* treeItem = nullptr;
 
@@ -133,15 +137,6 @@ namespace ScriptCanvasEditor
                 m_additionTimer.start();
             }
         }
-        
-        if (m_updatePolicy == UpdatePolicy::SingleTime)
-        {
-            treeItem = CreateChildNodeWithoutAddSignal<ExecutionLogTreeItem>(loggingDataId, nodeType, graphInfo, nodeId);
-        }
-        else
-        {
-            treeItem = CreateChildNode<ExecutionLogTreeItem>(loggingDataId, nodeType, graphInfo, nodeId);
-        }
 
         return treeItem;
     }
@@ -185,7 +180,11 @@ namespace ScriptCanvasEditor
     // ExecutionLogTreeItem
     /////////////////////////
 
-    ExecutionLogTreeItem::ExecutionLogTreeItem(const LoggingDataId& loggingDataId, const ScriptCanvas::NodeTypeIdentifier& nodeType, const ScriptCanvas::GraphInfo& graphInfo, const ScriptCanvas::NamedNodeId& nodeId)
+    ExecutionLogTreeItem::ExecutionLogTreeItem
+        ( const LoggingDataId& loggingDataId
+        , const ScriptCanvas::NodeTypeIdentifier& nodeType
+        , const SourceHandle& graphInfo
+        , const ScriptCanvas::NamedNodeId& nodeId)
         : m_loggingDataId(loggingDataId)
         , m_nodeType(nodeType)
         , m_graphInfo(graphInfo)
@@ -196,7 +195,6 @@ namespace ScriptCanvasEditor
         m_paletteConfiguration.SetColorPalette("MethodNodeTitlePalette");
 
         AZ::NamedEntityId entityName;
-        LoggingDataRequestBus::EventResult(entityName, m_loggingDataId, &LoggingDataRequests::FindNamedEntityId, m_graphInfo.m_runtimeEntity);
 
         m_sourceEntityName = entityName.ToString().c_str();
         m_displayName = nodeId.m_name.c_str();
@@ -207,7 +205,7 @@ namespace ScriptCanvasEditor
         m_inputName = "---";
         m_outputName = "---";
 
-        GeneralAssetNotificationBus::Handler::BusConnect(GetAssetId());
+        GeneralAssetNotificationBus::Handler::BusConnect(graphInfo);
     }
 
     QVariant ExecutionLogTreeItem::Data(const QModelIndex& index, int role) const
@@ -502,12 +500,12 @@ namespace ScriptCanvasEditor
 
     const ScriptCanvas::GraphIdentifier& ExecutionLogTreeItem::GetGraphIdentifier() const
     {
-        return m_graphInfo.m_graphIdentifier;
+        return m_graphIdentifier;
     }
 
-    const AZ::Data::AssetId& ExecutionLogTreeItem::GetAssetId() const
+    AZ::Data::AssetId ExecutionLogTreeItem::GetAssetId() const
     {
-        return m_graphInfo.m_graphIdentifier.m_assetId;
+        return m_graphInfo.Id();
     }
 
     AZ::EntityId ExecutionLogTreeItem::GetScriptCanvasAssetNodeId() const
@@ -623,12 +621,14 @@ namespace ScriptCanvasEditor
     {
         if (!m_graphCanvasGraphId.IsValid())
         {
-            GeneralRequestBus::BroadcastResult(m_graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, GetAssetId());
+            GeneralRequestBus::BroadcastResult(m_graphCanvasGraphId
+                , &GeneralRequests::FindGraphCanvasGraphIdByAssetId, SourceHandle(nullptr, GetAssetId().m_guid, ""));
 
             if (!EditorGraphNotificationBus::Handler::BusIsConnected())
             {
                 ScriptCanvas::ScriptCanvasId scriptCanvasId;
-                GeneralRequestBus::BroadcastResult(scriptCanvasId, &GeneralRequests::FindScriptCanvasIdByAssetId, GetAssetId());
+                GeneralRequestBus::BroadcastResult(scriptCanvasId
+                    , &GeneralRequests::FindScriptCanvasIdByAssetId, SourceHandle(nullptr, GetAssetId().m_guid, ""));
 
                 EditorGraphNotificationBus::Handler::BusConnect(scriptCanvasId);
             }
@@ -638,7 +638,9 @@ namespace ScriptCanvasEditor
         {
             if (!m_graphCanvasNodeId.IsValid())
             {
-                AssetGraphSceneBus::BroadcastResult(m_scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, GetAssetId(), m_scriptCanvasAssetNodeId);
+                AssetGraphSceneBus::BroadcastResult(m_scriptCanvasNodeId
+                    , &AssetGraphScene::FindEditorNodeIdByAssetNodeId
+                    , SourceHandle(nullptr, GetAssetId().m_guid, ""), m_scriptCanvasAssetNodeId);
                 SceneMemberMappingRequestBus::EventResult(m_graphCanvasNodeId, m_scriptCanvasNodeId, &SceneMemberMappingRequests::GetGraphCanvasEntityId);
             }
 
@@ -806,7 +808,8 @@ namespace ScriptCanvasEditor
     {
         if (!m_graphCanvasGraphId.IsValid())
         {
-            GeneralRequestBus::BroadcastResult(m_graphCanvasGraphId, &GeneralRequests::FindGraphCanvasGraphIdByAssetId, m_graphIdentifier.m_assetId);
+            GeneralRequestBus::BroadcastResult(m_graphCanvasGraphId
+                , &GeneralRequests::FindGraphCanvasGraphIdByAssetId, SourceHandle(nullptr, m_graphIdentifier.m_assetId.m_guid, ""));
         }
 
         ScrapeInputName();
@@ -828,7 +831,7 @@ namespace ScriptCanvasEditor
         if (m_graphCanvasGraphId.IsValid() && m_assetInputEndpoint.IsValid())
         {
             AZ::EntityId scriptCanvasNodeId;
-            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, GetAssetId(), m_assetInputEndpoint.GetNodeId());
+            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, SourceHandle(nullptr, GetAssetId().m_guid, ""), m_assetInputEndpoint.GetNodeId());
 
             GraphCanvas::NodeId graphCanvasNodeId;
             SceneMemberMappingRequestBus::EventResult(graphCanvasNodeId, scriptCanvasNodeId, &SceneMemberMappingRequests::GetGraphCanvasEntityId);
@@ -851,8 +854,9 @@ namespace ScriptCanvasEditor
         if (m_graphCanvasGraphId.IsValid() && m_assetOutputEndpoint.IsValid())
         {
             AZ::EntityId scriptCanvasNodeId;
-            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId, GetAssetId(), m_assetOutputEndpoint.GetNodeId());
-
+            AssetGraphSceneBus::BroadcastResult(scriptCanvasNodeId, &AssetGraphScene::FindEditorNodeIdByAssetNodeId
+                , SourceHandle(nullptr, GetAssetId().m_guid, ""), m_assetOutputEndpoint.GetNodeId());
+            
             GraphCanvas::NodeId graphCanvasNodeId;
             SceneMemberMappingRequestBus::EventResult(graphCanvasNodeId, scriptCanvasNodeId, &SceneMemberMappingRequests::GetGraphCanvasEntityId);
 

Gems/ScriptCanvas/Code/Editor/View/Widgets/LoggingPanel/LoggingWindowTreeItems.h

@@ -131,7 +131,12 @@ namespace ScriptCanvasEditor
         AZ_CLASS_ALLOCATOR(ExecutionLogTreeItem, AZ::SystemAllocator, 0);
         AZ_RTTI(ExecutionLogTreeItem, "{71139142-A30C-4A16-81CC-D51314AEAF7D}", DebugLogTreeItem);
 
-        ExecutionLogTreeItem(const LoggingDataId& loggingDataId, const ScriptCanvas::NodeTypeIdentifier& nodeType, const ScriptCanvas::GraphInfo& graphInfo, const ScriptCanvas::NamedNodeId& nodeId);
+        ExecutionLogTreeItem
+            ( const LoggingDataId& loggingDataId
+            , const ScriptCanvas::NodeTypeIdentifier& nodeType
+            , const SourceHandle& graphInfo
+            , const ScriptCanvas::NamedNodeId& nodeId);
+
         ~ExecutionLogTreeItem() override = default;
 
         QVariant Data(const QModelIndex& index, int role) const override final;
@@ -163,7 +168,7 @@ namespace ScriptCanvasEditor
         ////
 
         const ScriptCanvas::GraphIdentifier& GetGraphIdentifier() const;
-        const AZ::Data::AssetId& GetAssetId() const;
+        AZ::Data::AssetId GetAssetId() const;
 
         AZ::EntityId        GetScriptCanvasAssetNodeId() const;
         GraphCanvas::NodeId GetGraphCanvasNodeId() const;
@@ -184,7 +189,8 @@ namespace ScriptCanvasEditor
 
         LoggingDataId                       m_loggingDataId;
         ScriptCanvas::NodeTypeIdentifier    m_nodeType;
-        ScriptCanvas::GraphInfo             m_graphInfo;
+        SourceHandle                        m_graphInfo;
+        ScriptCanvas::GraphIdentifier       m_graphIdentifier;
         QString                             m_sourceEntityName;
         QString                             m_graphName;
         QString                             m_relativeGraphPath;

Gems/ScriptCanvas/Code/Editor/View/Widgets/LoggingPanel/PivotTree/PivotTreeWidget.cpp

@@ -406,15 +406,14 @@ namespace ScriptCanvasEditor
             sourceIndex = proxyModel->mapToSource(modelIndex);
         }
 
-        PivotTreeItem* pivotTreeItem = static_cast<PivotTreeItem*>(sourceIndex.internalPointer());
-
-        if (pivotTreeItem)
+        if (PivotTreeItem* pivotTreeItem = static_cast<PivotTreeItem*>(sourceIndex.internalPointer()))
         {
-            PivotTreeGraphItem* graphItem = azrtti_cast<PivotTreeGraphItem*>(pivotTreeItem);
-
-            if (graphItem)
+            if (PivotTreeGraphItem* graphItem = azrtti_cast<PivotTreeGraphItem*>(pivotTreeItem))
             {
-                GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId, graphItem->GetAssetId());
+                GeneralRequestBus::Broadcast
+                    ( &GeneralRequests::OpenScriptCanvasAssetId
+                    , SourceHandle(nullptr, graphItem->GetAssetId().m_guid, "")
+                    , Tracker::ScriptCanvasFileState::UNMODIFIED);
             }
         }
     }

Gems/ScriptCanvas/Code/Editor/View/Widgets/NodePalette/FunctionNodePaletteTreeItemTypes.cpp

@@ -129,7 +129,10 @@ namespace ScriptCanvasEditor
     {
         if (row == NodePaletteTreeItem::Column::Customization)
         {
-            GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAsset, GetSourceAssetId(), -1);
+            GeneralRequestBus::Broadcast
+                ( &GeneralRequests::OpenScriptCanvasAssetId
+                , SourceHandle(nullptr, GetSourceAssetId().m_guid, "")
+                , Tracker::ScriptCanvasFileState::UNMODIFIED);
         }
     }
 
@@ -137,7 +140,10 @@ namespace ScriptCanvasEditor
     {
         if (row != NodePaletteTreeItem::Column::Customization)
         {
-            GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAsset, GetSourceAssetId(), -1);
+            GeneralRequestBus::Broadcast
+                ( &GeneralRequests::OpenScriptCanvasAssetId
+                , SourceHandle(nullptr, GetSourceAssetId().m_guid, "")
+                , Tracker::ScriptCanvasFileState::UNMODIFIED);
             return true;
         }
 

Gems/ScriptCanvas/Code/Editor/View/Widgets/SourceHandlePropertyAssetCtrl.cpp

@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <ScriptCanvas/Components/EditorUtils.h>
+#include <Editor/View/Widgets/SourceHandlePropertyAssetCtrl.h>
+
+#include <AzFramework/StringFunc/StringFunc.h>
+
+#include <AzToolsFramework/AssetBrowser/AssetBrowserBus.h>
+#include <AzToolsFramework/AssetBrowser/AssetBrowserEntry.h>
+#include <AzToolsFramework/UI/PropertyEditor/Model/AssetCompleterModel.h>
+#include <AzToolsFramework/UI/PropertyEditor/PropertyEditorAPI.h>
+
+namespace ScriptCanvasEditor
+{
+    SourceHandlePropertyAssetCtrl::SourceHandlePropertyAssetCtrl(QWidget* parent)
+        : AzToolsFramework::PropertyAssetCtrl(parent)
+    {
+    }
+
+    AzToolsFramework::AssetBrowser::AssetSelectionModel SourceHandlePropertyAssetCtrl::GetAssetSelectionModel()
+    {
+        auto selectionModel = AssetSelectionModel::SourceAssetTypeSelection(m_sourceAssetFilterPattern);
+        selectionModel.SetTitle(m_title);
+        return selectionModel;
+    }
+
+    void SourceHandlePropertyAssetCtrl::PopupAssetPicker()
+    {
+        // Request the AssetBrowser Dialog and set a type filter
+        AssetSelectionModel selection = GetAssetSelectionModel();
+        selection.SetSelectedFilePath(m_selectedSourcePath.c_str());
+
+        AZStd::string defaultDirectory;
+        if (m_defaultDirectoryCallback)
+        {
+            m_defaultDirectoryCallback->Invoke(m_editNotifyTarget, defaultDirectory);
+            selection.SetDefaultDirectory(defaultDirectory);
+        }
+
+        AssetBrowserComponentRequestBus::Broadcast(&AssetBrowserComponentRequests::PickAssets, selection, parentWidget());
+        if (selection.IsValid())
+        {
+            const auto source = azrtti_cast<const SourceAssetBrowserEntry*>(selection.GetResult());
+            AZ_Assert(source, "Incorrect entry type selected. Expected source.");
+            if (source)
+            {
+                SetSelectedSourcePath(source->GetFullPath());
+            }
+        }
+    }
+
+    void SourceHandlePropertyAssetCtrl::ClearAssetInternal()
+    {
+        SetSelectedSourcePath("");
+
+        PropertyAssetCtrl::ClearAssetInternal();
+    }
+
+    void SourceHandlePropertyAssetCtrl::ConfigureAutocompleter()
+    {
+        if (m_completerIsConfigured)
+        {
+            return;
+        }
+
+        AzToolsFramework::PropertyAssetCtrl::ConfigureAutocompleter();
+
+        AssetSelectionModel selection = GetAssetSelectionModel();
+        m_model->SetFetchEntryType(AssetBrowserEntry::AssetEntryType::Source);
+        m_model->SetFilter(selection.GetDisplayFilter());
+    }
+
+    void SourceHandlePropertyAssetCtrl::SetSourceAssetFilterPattern(const QString& filterPattern)
+    {
+        m_sourceAssetFilterPattern = filterPattern;
+    }
+
+    AZ::IO::Path SourceHandlePropertyAssetCtrl::GetSelectedSourcePath() const
+    {
+        return m_selectedSourcePath;
+    }
+
+    void SourceHandlePropertyAssetCtrl::SetSelectedSourcePath(const AZ::IO::Path& sourcePath)
+    {
+        m_selectedSourcePath = sourcePath;
+
+        AZStd::string displayText;
+        if (!sourcePath.empty())
+        {
+            AzFramework::StringFunc::Path::GetFileName(sourcePath.c_str(), displayText);
+        }
+        m_browseEdit->setText(displayText.c_str());
+
+        // The AssetID gets ignored, the only important bit is triggering the change for the RequestWrite
+        emit OnAssetIDChanged(AZ::Data::AssetId());
+    }
+
+    void SourceHandlePropertyAssetCtrl::OnAutocomplete(const QModelIndex& index)
+    {
+        SetSelectedSourcePath(m_model->GetPathFromIndex(GetSourceIndex(index)));
+    }
+
+    QWidget* SourceHandlePropertyHandler::CreateGUI(QWidget* pParent)
+    {
+        SourceHandlePropertyAssetCtrl* newCtrl = aznew SourceHandlePropertyAssetCtrl(pParent);
+        connect(newCtrl, &SourceHandlePropertyAssetCtrl::OnAssetIDChanged, this, [newCtrl](AZ::Data::AssetId newAssetID)
+        {
+            (void)newAssetID;
+            AzToolsFramework::PropertyEditorGUIMessages::Bus::Broadcast(&AzToolsFramework::PropertyEditorGUIMessages::RequestWrite, newCtrl);
+            AzToolsFramework::PropertyEditorGUIMessages::Bus::Broadcast(&AzToolsFramework::PropertyEditorGUIMessages::OnEditingFinished, newCtrl);
+        });
+        return newCtrl;
+    }
+
+    void SourceHandlePropertyHandler::ConsumeAttribute(SourceHandlePropertyAssetCtrl* GUI, AZ::u32 attrib, AzToolsFramework::PropertyAttributeReader* attrValue, const char* debugName)
+    {
+        // Let the AssetPropertyHandlerDefault handle all of the common attributes
+        AzToolsFramework::AssetPropertyHandlerDefault::ConsumeAttributeInternal(GUI, attrib, attrValue, debugName);
+
+        if (attrib == AZ::Edit::Attributes::SourceAssetFilterPattern)
+        {
+            AZStd::string filterPattern;
+            if (attrValue->Read<AZStd::string>(filterPattern))
+            {
+                GUI->SetSourceAssetFilterPattern(filterPattern.c_str());
+            }
+        }
+    }
+
+    void SourceHandlePropertyHandler::WriteGUIValuesIntoProperty(size_t index, SourceHandlePropertyAssetCtrl* GUI, property_t& instance, AzToolsFramework::InstanceDataNode* node)
+    {
+        (void)index;
+        (void)node;
+
+        auto sourceHandle = SourceHandle(nullptr, GUI->GetSelectedSourcePath());
+        auto completeSourceHandle = CompleteDescription(sourceHandle);
+        if (completeSourceHandle)
+        {
+            instance = property_t(*CompleteDescription(sourceHandle));
+        }
+        else
+        {
+            instance = property_t();
+        }
+    }
+
+    bool SourceHandlePropertyHandler::ReadValuesIntoGUI(size_t index, SourceHandlePropertyAssetCtrl* GUI, const property_t& instance, AzToolsFramework::InstanceDataNode* node)
+    {
+        (void)index;
+        (void)node;
+
+        GUI->blockSignals(true);
+
+        GUI->SetSelectedSourcePath(instance.Path());
+        GUI->SetEditNotifyTarget(node->GetParent()->GetInstance(0));
+
+        GUI->blockSignals(false);
+        return false;
+    }
+}

Gems/ScriptCanvas/Code/Editor/View/Widgets/SourceHandlePropertyAssetCtrl.h

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#if !defined(Q_MOC_RUN)
+#include <AzToolsFramework/UI/PropertyEditor/PropertyAssetCtrl.hxx>
+
+#include <Core/Core.h>
+#endif
+
+namespace ScriptCanvasEditor
+{
+    class SourceHandlePropertyAssetCtrl
+        : public AzToolsFramework::PropertyAssetCtrl
+    {
+        Q_OBJECT
+
+    public:
+        AZ_CLASS_ALLOCATOR(SourceHandlePropertyAssetCtrl, AZ::SystemAllocator, 0);
+
+        SourceHandlePropertyAssetCtrl(QWidget* parent = nullptr);
+
+        AzToolsFramework::AssetBrowser::AssetSelectionModel GetAssetSelectionModel() override;
+        void PopupAssetPicker() override;
+        void ClearAssetInternal() override;
+        void ConfigureAutocompleter() override;
+
+        void SetSourceAssetFilterPattern(const QString& filterPattern);
+
+        AZ::IO::Path GetSelectedSourcePath() const;
+        void SetSelectedSourcePath(const AZ::IO::Path& sourcePath);
+
+    public Q_SLOTS:
+        void OnAutocomplete(const QModelIndex& index) override;
+
+    private:
+        //! A regular expression pattern for filtering by source assets
+        //! If this is set, the PropertyAssetCtrl will be dealing with source assets
+        //! instead of a specific asset type
+        QString m_sourceAssetFilterPattern;
+
+        AZ::IO::Path m_selectedSourcePath;
+    };
+
+    class SourceHandlePropertyHandler
+        : QObject
+        , public AzToolsFramework::PropertyHandler<SourceHandle, SourceHandlePropertyAssetCtrl>
+    {
+        Q_OBJECT
+
+    public:
+        AZ_CLASS_ALLOCATOR(SourceHandlePropertyHandler, AZ::SystemAllocator, 0);
+
+        AZ::u32 GetHandlerName(void) const override { return AZ_CRC_CE("SourceHandle"); }
+        bool IsDefaultHandler() const override { return true; }
+        QWidget* GetFirstInTabOrder(SourceHandlePropertyAssetCtrl* widget) override { return widget->GetFirstInTabOrder(); }
+        QWidget* GetLastInTabOrder(SourceHandlePropertyAssetCtrl* widget) override { return widget->GetLastInTabOrder(); }
+        void UpdateWidgetInternalTabbing(SourceHandlePropertyAssetCtrl* widget) override { widget->UpdateTabOrder(); }
+
+        QWidget* CreateGUI(QWidget* pParent) override;
+        void ConsumeAttribute(SourceHandlePropertyAssetCtrl* GUI, AZ::u32 attrib, AzToolsFramework::PropertyAttributeReader* attrValue, const char* debugName) override;
+        void WriteGUIValuesIntoProperty(size_t index, SourceHandlePropertyAssetCtrl* GUI, property_t& instance, AzToolsFramework::InstanceDataNode* node) override;
+        bool ReadValuesIntoGUI(size_t index, SourceHandlePropertyAssetCtrl* GUI, const property_t& instance, AzToolsFramework::InstanceDataNode* node)  override;
+    };
+}

Gems/ScriptCanvas/Code/Editor/View/Widgets/StatisticsDialog/ScriptCanvasStatisticsDialog.cpp

@@ -257,7 +257,10 @@ namespace ScriptCanvasEditor
 
                 if (treeItem->GetAssetId().IsValid())
                 {
-                    GeneralRequestBus::Broadcast(&GeneralRequests::OpenScriptCanvasAssetId, treeItem->GetAssetId());
+                    GeneralRequestBus::Broadcast
+                        ( &GeneralRequests::OpenScriptCanvasAssetId
+                        , SourceHandle(nullptr, treeItem->GetAssetId().m_guid, "")
+                        , Tracker::ScriptCanvasFileState::UNMODIFIED);
                 }
             }
         }

Gems/ScriptCanvas/Code/Editor/View/Widgets/UnitTestPanel/UnitTestDockWidget.cpp

@@ -433,7 +433,10 @@ namespace ScriptCanvasEditor
         AZ::Data::AssetId sourceAssetId(sourceUuid, 0);
 
         AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
-        GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAssetId, sourceAssetId);
+        GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAssetId
+            , ScriptCanvasEditor::SourceHandle(nullptr, sourceUuid, {})
+            , Tracker::ScriptCanvasFileState::UNMODIFIED);
+
         if (!openOutcome)
         {
             AZ_Warning("Script Canvas", openOutcome, "%s", openOutcome.GetError().data());

Gems/ScriptCanvas/Code/Editor/View/Widgets/VariablePanel/GraphVariablesTableView.cpp

@@ -716,10 +716,7 @@ namespace ScriptCanvasEditor
     void GraphVariablesModel::SetActiveScene(const ScriptCanvas::ScriptCanvasId& scriptCanvasId)
     {
         ScriptCanvas::GraphVariableManagerNotificationBus::Handler::BusDisconnect();
-
-        m_assetType = AZ::Data::AssetType::CreateNull();
-        ScriptCanvas::GraphRequestBus::EventResult(m_assetType, scriptCanvasId, &ScriptCanvas::GraphRequests::GetAssetType);
-
+        m_assetType = azrtti_typeid<ScriptCanvasAsset>();
         m_scriptCanvasId = scriptCanvasId;
 
         if (m_scriptCanvasId.IsValid())

Gems/ScriptCanvas/Code/Editor/View/Windows/MainWindow.h

@@ -43,7 +43,6 @@
 #include <ScriptCanvas/Bus/EditorScriptCanvasBus.h>
 #include <ScriptCanvas/Core/ScriptCanvasBus.h>
 #include <ScriptCanvas/Debugger/ClientTransceiver.h>
-
 #include <Editor/Assets/ScriptCanvasAssetHolder.h>
 #include <Editor/Undo/ScriptCanvasGraphCommand.h>
 #include <Editor/Utilities/RecentFiles.h>
@@ -53,6 +52,7 @@
 #include <Editor/View/Widgets/AssetGraphSceneDataBus.h>
 
 #include <Editor/View/Windows/Tools/UpgradeTool/Controller.h>
+#include <Editor/View/Windows/Tools/UpgradeTool/FileSaver.h>
 
 #if SCRIPTCANVAS_EDITOR
 #include <Include/EditorCoreAPI.h>
@@ -153,7 +153,7 @@ namespace ScriptCanvasEditor
         }
     };
 
-    //! Manages the Save/Restore operations of the user's las topened and focused graphs
+    //! Manages the Save/Restore operations of the user's last opened and focused graphs
     class Workspace
         : AssetTrackerNotificationBus::MultiHandler
     {
@@ -175,9 +175,9 @@ namespace ScriptCanvasEditor
     private:
 
         void OnAssetReady(const ScriptCanvasMemoryAsset::pointer asset) override;
-        void SignalAssetComplete(const AZ::Data::AssetId& fileAssetId);
+        void SignalAssetComplete(const ScriptCanvasEditor::SourceHandle& fileAssetId);
 
-        AZ::Data::AssetId GetSourceAssetId(const AZ::Data::AssetId& memoryAssetId) const;
+        ScriptCanvasEditor::SourceHandle GetSourceAssetId(const ScriptCanvasEditor::SourceHandle& memoryAssetId) const;
 
         bool m_rememberOpenCanvases;
         MainWindow* m_mainWindow;
@@ -185,10 +185,10 @@ namespace ScriptCanvasEditor
         //! Setting focus is problematic unless it is done until after all currently loading graphs have finished loading
         //! This vector is used to track the list of graphs being opened to restore the workspace and as assets are fully
         //! ready and activated they are removed from this list.
-        AZStd::vector<AZ::Data::AssetId> m_loadingAssets;
+        AZStd::vector<ScriptCanvasEditor::SourceHandle> m_loadingAssets;
 
         //! During restore we queue the asset Id to focus in order to do it last
-        AZ::Data::AssetId m_queuedAssetFocus;
+        ScriptCanvasEditor::SourceHandle m_queuedAssetFocus;
     };
 
     enum class UnsavedChangesOptions;
@@ -230,7 +230,6 @@ namespace ScriptCanvasEditor
         , private VariablePaletteRequestBus::Handler
         , private ScriptCanvas::BatchOperationNotificationBus::Handler
         , private AssetGraphSceneBus::Handler
-        , private AssetTrackerNotificationBus::MultiHandler
 #if SCRIPTCANVAS_EDITOR
         //, public IEditorNotifyListener
 #endif
@@ -239,6 +238,7 @@ namespace ScriptCanvasEditor
         , private GraphCanvas::ViewNotificationBus::Handler
         , public AZ::SystemTickBus::Handler
         , private AzToolsFramework::ToolsApplicationNotificationBus::Handler
+        , private AzToolsFramework::AssetSystemBus::Handler
         , private ScriptCanvas::ScriptCanvasSettingsRequestBus::Handler
     {
         Q_OBJECT
@@ -269,7 +269,7 @@ namespace ScriptCanvasEditor
 
         // Undo Handlers
         void PostUndoPoint(ScriptCanvas::ScriptCanvasId scriptCanvasId) override;
-        void SignalSceneDirty(AZ::Data::AssetId assetId) override;
+        void SignalSceneDirty(ScriptCanvasEditor::SourceHandle assetId) override;
 
         void PushPreventUndoStateUpdate() override;
         void PopPreventUndoStateUpdate() override;
@@ -325,12 +325,17 @@ namespace ScriptCanvasEditor
         // File menu
         void OnFileNew();
 
-        bool OnFileSave(const Callbacks::OnSave& saveCB);
-        bool OnFileSaveAs(const Callbacks::OnSave& saveCB);
-        bool OnFileSaveCaller(){return OnFileSave(nullptr);};
-        bool OnFileSaveAsCaller(){return OnFileSaveAs(nullptr);};        
-        bool SaveAssetImpl(const AZ::Data::AssetId& assetId, const Callbacks::OnSave& saveCB);
-        bool SaveAssetAsImpl(const AZ::Data::AssetId& assetId, const Callbacks::OnSave& saveCB);
+        bool OnFileSave();
+        bool OnFileSaveAs();
+        bool OnFileSaveCaller(){return OnFileSave();};
+        bool OnFileSaveAsCaller(){return OnFileSaveAs();};        
+        bool SaveAssetImpl_OLD(const ScriptCanvasEditor::SourceHandle& assetId, const Callbacks::OnSave& saveCB);
+        enum class Save
+        {
+            InPlace,
+            As
+        };
+        bool SaveAssetImpl(const ScriptCanvasEditor::SourceHandle& assetId, Save save);
         void OnFileOpen();        
 
         // Edit menu
@@ -415,30 +420,27 @@ namespace ScriptCanvasEditor
 
         void CloseNextTab();
 
-        bool IsTabOpen(const AZ::Data::AssetId& assetId, int& outTabIndex) const;
-        QVariant GetTabData(const AZ::Data::AssetId& assetId);
+        bool IsTabOpen(const SourceHandle& assetId, int& outTabIndex) const;
+        QVariant GetTabData(const SourceHandle& assetId);
 
         //! GeneralRequestBus
-        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAssetId(const AZ::Data::AssetId& assetId) override;
-        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAsset(AZ::Data::AssetId scriptCanvasAssetId, int tabIndex = -1) override;
-        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAsset(const ScriptCanvasMemoryAsset& scriptCanvasAsset, int tabIndex = -1);
-        int CloseScriptCanvasAsset(const AZ::Data::AssetId& assetId) override;
+        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAssetId(const SourceHandle& assetId, Tracker::ScriptCanvasFileState fileState) override;
+        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAsset(SourceHandle scriptCanvasAssetId, Tracker::ScriptCanvasFileState fileState, int tabIndex = -1) override;
+        AZ::Outcome<int, AZStd::string> OpenScriptCanvasAssetImplementation(const SourceHandle& sourceHandle, Tracker::ScriptCanvasFileState fileState, int tabIndex = -1);
+        int CloseScriptCanvasAsset(const SourceHandle& assetId) override;
         bool CreateScriptCanvasAssetFor(const TypeDefs::EntityComponentId& requestingEntityId) override;
 
-        bool IsScriptCanvasAssetOpen(const AZ::Data::AssetId& assetId) const override;
+        bool IsScriptCanvasAssetOpen(const SourceHandle& assetId) const override;
 
         const CategoryInformation* FindNodePaletteCategoryInformation(AZStd::string_view categoryPath) const override;
         const NodePaletteModelInformation* FindNodePaletteModelInformation(const ScriptCanvas::NodeTypeIdentifier& nodeType) const override;
         ////
 
-        AZ::Outcome<int, AZStd::string> CreateScriptCanvasAsset(AZStd::string_view assetPath, AZ::Data::AssetType assetType, int tabIndex = -1);
-        AZ::Outcome<int, AZStd::string> UpdateScriptCanvasAsset(const AZ::Data::Asset<ScriptCanvas::ScriptCanvasAssetBase>& scriptCanvasAsset);
+        AZ::Outcome<int, AZStd::string> CreateScriptCanvasAsset(AZStd::string_view assetPath, int tabIndex = -1);
         
-        void RefreshScriptCanvasAsset(const AZ::Data::Asset<ScriptCanvas::ScriptCanvasAssetBase>& scriptCanvasAsset);
-
         //! Removes the assetId -> ScriptCanvasAsset mapping and disconnects from the asset tracker
-        void RemoveScriptCanvasAsset(const AZ::Data::AssetId& assetId);
-        void OnChangeActiveGraphTab(AZ::Data::AssetId) override;
+        void RemoveScriptCanvasAsset(const ScriptCanvasEditor::SourceHandle& assetId);
+        void OnChangeActiveGraphTab(ScriptCanvasEditor::SourceHandle) override;
 
         void CreateNewRuntimeAsset() override { OnFileNew(); }
 
@@ -448,8 +450,8 @@ namespace ScriptCanvasEditor
 
         GraphCanvas::GraphId GetGraphCanvasGraphId(const ScriptCanvas::ScriptCanvasId& scriptCanvasId) const override;
 
-        GraphCanvas::GraphId FindGraphCanvasGraphIdByAssetId(const AZ::Data::AssetId& assetId) const override;
-        ScriptCanvas::ScriptCanvasId FindScriptCanvasIdByAssetId(const AZ::Data::AssetId& assetId) const override;
+        GraphCanvas::GraphId FindGraphCanvasGraphIdByAssetId(const ScriptCanvasEditor::SourceHandle& assetId) const override;
+        ScriptCanvas::ScriptCanvasId FindScriptCanvasIdByAssetId(const ScriptCanvasEditor::SourceHandle& assetId) const override;
 
         bool IsInUndoRedo(const AZ::EntityId& graphCanvasGraphId) const override;
         bool IsScriptCanvasInUndoRedo(const ScriptCanvas::ScriptCanvasId& scriptCanvasId) const override;
@@ -517,17 +519,18 @@ namespace ScriptCanvasEditor
         QObject* FindElementByName(QString elementName) override;
         ////
 
-        AZ::EntityId FindEditorNodeIdByAssetNodeId(const AZ::Data::AssetId& assetId, AZ::EntityId assetNodeId) const override;
-        AZ::EntityId FindAssetNodeIdByEditorNodeId(const AZ::Data::AssetId& assetId, AZ::EntityId editorNodeId) const override;
+        AZ::EntityId FindEditorNodeIdByAssetNodeId(const ScriptCanvasEditor::SourceHandle& assetId, AZ::EntityId assetNodeId) const override;
+        AZ::EntityId FindAssetNodeIdByEditorNodeId(const ScriptCanvasEditor::SourceHandle& assetId, AZ::EntityId editorNodeId) const override;
         
     private:
+        void SourceFileChanged(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid fileAssetId) override;
+        void SourceFileRemoved(AZStd::string relativePath, AZStd::string scanFolder, AZ::Uuid fileAssetId) override;
+        
         void DeleteNodes(const AZ::EntityId& sceneId, const AZStd::vector<AZ::EntityId>& nodes) override;
         void DeleteConnections(const AZ::EntityId& sceneId, const AZStd::vector<AZ::EntityId>& connections) override;
         void DisconnectEndpoints(const AZ::EntityId& sceneId, const AZStd::vector<GraphCanvas::Endpoint>& endpoints) override;
         /////////////////////////////////////////////////////////////////////////////////////////////        
 
-        void UpdateWorkspaceStatus(const ScriptCanvasMemoryAsset& scriptCanvasAsset);
-
         GraphCanvas::Endpoint HandleProposedConnection(const GraphCanvas::GraphId& graphId, const GraphCanvas::ConnectionId& connectionId, const GraphCanvas::Endpoint& endpoint, const GraphCanvas::NodeId& proposedNode, const QPoint& screenPoint);
 
         //! UndoNotificationBus
@@ -543,29 +546,20 @@ namespace ScriptCanvasEditor
 
         void OnAutoSave();
 
-        //! Helper function which serializes a file to disk
-        //! \param filename name of file to serialize the Entity
-        //! \param asset asset to save
-        void GetSuggestedFullFilenameToSaveAs(const AZ::Data::AssetId& assetId, AZStd::string& filePath, AZStd::string& fileFilter);
-
-        void MarkAssetModified(const AZ::Data::AssetId& assetId);
+        void UpdateFileState(const ScriptCanvasEditor::SourceHandle& assetId, Tracker::ScriptCanvasFileState fileState);
 
         // QMainWindow
         void closeEvent(QCloseEvent *event) override;
         UnsavedChangesOptions ShowSaveDialog(const QString& filename);
         
-        bool ActivateAndSaveAsset(const AZ::Data::AssetId& unsavedAssetId, const Callbacks::OnSave& onSave);
+        bool ActivateAndSaveAsset(const ScriptCanvasEditor::SourceHandle& unsavedAssetId);
 
-        void SaveNewAsset(AZStd::string_view path, AZ::Data::AssetId assetId, const Callbacks::OnSave& onSave);
-        void SaveAsset(AZ::Data::AssetId assetId, const Callbacks::OnSave& onSave);
+        void SaveAs(AZStd::string_view path, ScriptCanvasEditor::SourceHandle assetId);
 
         void OpenFile(const char* fullPath);
         void CreateMenus();
 
-        void SignalActiveSceneChanged(const AZ::Data::AssetId assetId);
-
-        void SaveWorkspace(bool updateAssetList = true);
-        void RestoreWorkspace();
+        void SignalActiveSceneChanged(const ScriptCanvasEditor::SourceHandle assetId);
 
         void RunUpgradeTool();
 
@@ -593,29 +587,27 @@ namespace ScriptCanvasEditor
         void UpdateMenuState(bool enabledState);
 
         void OnWorkspaceRestoreStart();
-        void OnWorkspaceRestoreEnd(AZ::Data::AssetId lastFocusAsset);
+        void OnWorkspaceRestoreEnd(ScriptCanvasEditor::SourceHandle lastFocusAsset);
 
         void UpdateAssignToSelectionState();
         void UpdateUndoRedoState();
-        void UpdateSaveState();
+        void UpdateSaveState(bool enabled);
 
         void CreateFunctionInput();
         void CreateFunctionOutput();
 
         void CreateFunctionDefinitionNode(int positionOffset);
 
-        int CreateAssetTab(const AZ::Data::AssetId& assetId, int tabIndex = -1);
+        int CreateAssetTab(const ScriptCanvasEditor::SourceHandle& assetId, Tracker::ScriptCanvasFileState fileState, int tabIndex = -1);
 
         //! \param asset The AssetId of the ScriptCanvas Asset.
-        void SetActiveAsset(const AZ::Data::AssetId& assetId);
+        void SetActiveAsset(const ScriptCanvasEditor::SourceHandle& assetId);
         void RefreshActiveAsset();
 
-        void ReconnectSceneBuses(AZ::Data::AssetId previousAssetId, AZ::Data::AssetId nextAssetId);
-
-        void SignalBatchOperationComplete(BatchOperatorTool* batchTool);
+        void ReconnectSceneBuses(ScriptCanvasEditor::SourceHandle previousAssetId, ScriptCanvasEditor::SourceHandle nextAssetId);
 
         void PrepareActiveAssetForSave();
-        void PrepareAssetForSave(const AZ::Data::AssetId& asssetId);
+        void PrepareAssetForSave(const ScriptCanvasEditor::SourceHandle& asssetId);
 
         void RestartAutoTimerSave(bool forceTimer = false);
 
@@ -626,24 +618,16 @@ namespace ScriptCanvasEditor
         void AssignGraphToEntityImpl(const AZ::EntityId& entityId);
         ////
 
-        Tracker::ScriptCanvasFileState GetAssetFileState(AZ::Data::AssetId assetId) const;
+        Tracker::ScriptCanvasFileState GetAssetFileState(ScriptCanvasEditor::SourceHandle assetId) const;
 
-        AZ::Data::AssetId GetSourceAssetId(const AZ::Data::AssetId& memoryAssetId) const
+        ScriptCanvasEditor::SourceHandle GetSourceAssetId(const ScriptCanvasEditor::SourceHandle& memoryAssetId) const
         {
-            ScriptCanvasMemoryAsset::pointer memoryAsset;
-            AssetTrackerRequestBus::BroadcastResult(memoryAsset, &AssetTrackerRequests::GetAsset, memoryAssetId);
-
-            if (memoryAsset)
-            {
-                return memoryAsset->GetFileAssetId();
-            }
-
-            return AZ::Data::AssetId();
+            return memoryAssetId;
         }
 
-        int InsertTabForAsset(AZStd::string_view assetPath, AZ::Data::AssetId assetId, int tabIndex = -1);
+        int InsertTabForAsset(AZStd::string_view assetPath, ScriptCanvasEditor::SourceHandle assetId, int tabIndex = -1);
 
-        void UpdateUndoCache(AZ::Data::AssetId assetId);
+        void UpdateUndoCache(ScriptCanvasEditor::SourceHandle assetId);
 
 
         bool HasSystemTickAction(SystemTickActionFlag action);
@@ -655,34 +639,9 @@ namespace ScriptCanvasEditor
 
         void OpenNextFile();
 
-        template <typename GraphAssetType, typename AssetHandler>
-        void MakeNewFile()
-        {
-            static int scriptCanvasEditorDefaultNewNameCount = 0;
 
-            AZStd::string newAssetName = AZStd::string::format(ScriptCanvas::AssetDescription::GetAssetNamePattern<GraphAssetType>(), ++scriptCanvasEditorDefaultNewNameCount);
-
-            AZStd::array<char, AZ::IO::MaxPathLength> assetRootArray;
-            if (!AZ::IO::FileIOBase::GetInstance()->ResolvePath(ScriptCanvas::AssetDescription::GetSuggestedSavePath<GraphAssetType>(), assetRootArray.data(), assetRootArray.size()))
-            {
-                AZ_ErrorOnce("Script Canvas", false, "Unable to resolve @projectroot@ path");
-            }
-
-            AZStd::string assetPath;
-            AzFramework::StringFunc::Path::Join(assetRootArray.data(), (newAssetName + ScriptCanvas::AssetDescription::GetExtension<GraphAssetType>()).data(), assetPath);
-
-            auto createOutcome = CreateScriptCanvasAsset(assetPath, azrtti_typeid<GraphAssetType>());
-            if (createOutcome)
-            {
-            }
-            else
-            {
-                AZ_Warning("Script Canvas", createOutcome, "%s", createOutcome.GetError().data());
-            }
-        }
-
-        void DisableAssetView(ScriptCanvasMemoryAsset::pointer memoryAsset);
-        void EnableAssetView(ScriptCanvasMemoryAsset::pointer memoryAsset);
+        void DisableAssetView(const ScriptCanvasEditor::SourceHandle& memoryAssetId);
+        void EnableAssetView(const ScriptCanvasEditor::SourceHandle& memoryAssetId);
 
 
         QWidget* m_host = nullptr;
@@ -741,22 +700,22 @@ namespace ScriptCanvasEditor
         GraphCanvas::GraphCanvasEditorEmptyDockWidget* m_emptyCanvas; // Displayed when there is no open graph
         QVBoxLayout* m_layout;
 
-        AZ::Data::AssetId m_activeAssetId;
-
+        ScriptCanvasEditor::SourceHandle m_activeGraph;
+        
         bool                  m_loadingNewlySavedFile;
         AZStd::string         m_newlySavedFile;
 
         AZStd::string         m_errorFilePath;
 
         bool m_isClosingTabs;
-        AZ::Data::AssetId m_skipTabOnClose;
+        ScriptCanvasEditor::SourceHandle m_skipTabOnClose;
 
         bool m_enterState;
         bool m_ignoreSelection;
         AZ::s32 m_preventUndoStateUpdateCount;
 
         bool m_isRestoringWorkspace;
-        AZ::Data::AssetId m_queuedFocusOverride;
+        ScriptCanvasEditor::SourceHandle m_queuedFocusOverride;
 
         Ui::MainWindow* ui;
         AZStd::array<AZStd::pair<QAction*, QMetaObject::Connection>, c_scriptCanvasEditorSettingsRecentFilesCountMax> m_recentActions;
@@ -778,17 +737,17 @@ namespace ScriptCanvasEditor
         AZStd::vector<AZ::EntityId> m_selectedVariableIds;
 
         AZ::u32                                   m_systemTickActions;
-        AZStd::unordered_set< AZ::Data::AssetId > m_processedClosedAssetIds;
+        AZStd::unordered_set< ScriptCanvasEditor::SourceHandle > m_processedClosedAssetIds;
 
-        AZStd::unordered_set< AZ::Data::AssetId > m_loadingWorkspaceAssets;
-        AZStd::unordered_set< AZ::Data::AssetId > m_loadingAssets;
+        AZStd::unordered_set< ScriptCanvasEditor::SourceHandle > m_loadingWorkspaceAssets;
+        AZStd::unordered_set< ScriptCanvasEditor::SourceHandle > m_loadingAssets;
         AZStd::unordered_set< AZ::Uuid > m_variablePaletteTypes;
 
         AZStd::unordered_map< AZ::Crc32, QObject* > m_automationLookUpMap;
 
         bool m_closeCurrentGraphAfterSave;
 
-        AZStd::unordered_map< AZ::Data::AssetId, TypeDefs::EntityComponentId > m_assetCreationRequests;
+        AZStd::unordered_map< ScriptCanvasEditor::SourceHandle, TypeDefs::EntityComponentId > m_assetCreationRequests;
 
         ScriptCanvas::Debugger::ClientTransceiver m_clientTRX;
         GraphCanvas::StyleManager m_styleManager;
@@ -797,6 +756,14 @@ namespace ScriptCanvasEditor
         //! this object manages the Save/Restore operations
         Workspace* m_workspace;
 
-        void OnSaveCallback(bool saveSuccess, AZ::Data::AssetPtr, AZ::Data::AssetId previousFileAssetId);
+        AZStd::unique_ptr<VersionExplorer::FileSaver> m_fileSaver;
+        VersionExplorer::FileSaveResult m_fileSaveResult;
+        void OnSaveCallBack(const VersionExplorer::FileSaveResult& result);
+
+        void ClearStaleSaves();
+        bool IsRecentSave(const SourceHandle& handle) const;
+        void MarkRecentSave(const SourceHandle& handle);
+        AZStd::recursive_mutex m_mutex; 
+        AZStd::unordered_map <AZStd::string, AZStd::chrono::system_clock::time_point> m_saves;
     };
 }

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Controller.cpp

@@ -53,7 +53,6 @@ namespace ScriptCanvasEditor
             m_view->textEdit->setVerticalScrollBarPolicy(Qt::ScrollBarPolicy::ScrollBarAlwaysOn);
             connect(m_view->scanButton, &QPushButton::pressed, this, &Controller::OnButtonPressScan);
             connect(m_view->closeButton, &QPushButton::pressed, this, &Controller::OnButtonPressClose);
-            m_view->upgradeAllButton->setVisible(false);
             connect(m_view->upgradeAllButton, &QPushButton::pressed, this, &Controller::OnButtonPressUpgrade);
             m_view->progressBar->setValue(0);
             m_view->progressBar->setVisible(false);
@@ -104,9 +103,9 @@ namespace ScriptCanvasEditor
             }
         }
 
-        QList<QTableWidgetItem*> Controller::FindTableItems(const AZ::Data::AssetInfo& info)
+        QList<QTableWidgetItem*> Controller::FindTableItems(const SourceHandle& info)
         {
-            return m_view->tableWidget->findItems(info.m_relativePath.c_str(), Qt::MatchFlag::MatchExactly);
+            return m_view->tableWidget->findItems(info.Path().c_str(), Qt::MatchFlag::MatchExactly);
         }
 
         void Controller::OnButtonPressClose()
@@ -117,30 +116,20 @@ namespace ScriptCanvasEditor
         void Controller::OnButtonPressScan()
         {
             // \todo move to another file
-            auto isUpToDate = [this](AZ::Data::Asset<AZ::Data::AssetData> asset)
+            auto isUpToDate = [this](const SourceHandle& asset)
             {
-                AZ::Entity* scriptCanvasEntity = nullptr;
+                auto graphComponent = asset.Get();
 
-                if (asset.GetType() == azrtti_typeid<ScriptCanvasAsset>())
-                {
-                    ScriptCanvasAsset* scriptCanvasAsset = asset.GetAs<ScriptCanvasAsset>();
-                    if (!scriptCanvasAsset)
-                    {
-                        AZ_Warning
-                        (ScriptCanvas::k_VersionExplorerWindow.data()
-                            , false
-                            , "InspectAsset: %s, AsestData failed to return ScriptCanvasAsset"
-                            , asset.GetHint().c_str());
-                        return true;
-                    }
+                AZ_Warning
+                    ( ScriptCanvas::k_VersionExplorerWindow.data()
+                    , asset.Get() != nullptr
+                    , "InspectAsset: %s, failed to load valid graph"
+                    , asset.Path().c_str());
 
-                    scriptCanvasEntity = scriptCanvasAsset->GetScriptCanvasEntity();
-                    AZ_Assert(scriptCanvasEntity, "The Script Canvas asset must have a valid entity");
-                }
-
-                auto graphComponent = scriptCanvasEntity->FindComponent<ScriptCanvasEditor::Graph>();
-                AZ_Assert(graphComponent, "The Script Canvas entity must have a Graph component");
-                return !m_view->forceUpgrade->isChecked() && graphComponent->GetVersion().IsLatest();
+                return graphComponent
+                    && (!graphComponent->GetVersion().IsLatest() || m_view->forceUpgrade->isChecked())
+                        ? ScanConfiguration::Filter::Include
+                        : ScanConfiguration::Filter::Exclude;
             };
 
             ScanConfiguration config;
@@ -156,59 +145,19 @@ namespace ScriptCanvasEditor
             OnButtonPressUpgradeImplementation({});
         }
 
-        void Controller::OnButtonPressUpgradeImplementation(const AZ::Data::AssetInfo& assetInfo)
+        void Controller::OnButtonPressUpgradeImplementation(const SourceHandle& assetInfo)
         {
-            auto simpleUpdate = [this](AZ::Data::Asset<AZ::Data::AssetData> asset)
+            auto simpleUpdate = [this](SourceHandle& asset)
             {
-                if (asset.GetType() == azrtti_typeid<ScriptCanvasAsset>())
+                AZ_Warning(ScriptCanvas::k_VersionExplorerWindow.data(), asset.Get() != nullptr
+                    , "The Script Canvas asset must have a Graph component");
+
+                if (asset.Get())
                 {
-                    ScriptCanvasAsset* scriptCanvasAsset = asset.GetAs<ScriptCanvasAsset>();
-                    AZ_Assert(scriptCanvasAsset, "Unable to get the asset of ScriptCanvasAsset, but received type: %s"
-                        , azrtti_typeid<ScriptCanvasAsset>().template ToString<AZStd::string>().c_str());
-                    if (!scriptCanvasAsset)
-                    {
-                        return;
-                    }
-
-                    AZ::Entity* scriptCanvasEntity = scriptCanvasAsset->GetScriptCanvasEntity();
-                    AZ_Assert(scriptCanvasEntity, "View::UpgradeGraph The Script Canvas asset must have a valid entity");
-                    if (!scriptCanvasEntity)
-                    {
-                        return;
-                    }
-
-                    AZ::Entity* queryEntity = nullptr;
-                    AZ::ComponentApplicationBus::BroadcastResult(queryEntity, &AZ::ComponentApplicationRequests::FindEntity, scriptCanvasEntity->GetId());
-                    if (queryEntity)
-                    {
-                        if (queryEntity->GetState() == AZ::Entity::State::Active)
-                        {
-                            queryEntity->Deactivate();
-                        }
-
-                        scriptCanvasEntity = queryEntity;
-                    }
-
-                    if (scriptCanvasEntity->GetState() == AZ::Entity::State::Constructed)
-                    {
-                        scriptCanvasEntity->Init();
-                    }
-
-                    if (scriptCanvasEntity->GetState() == AZ::Entity::State::Init)
-                    {
-                        scriptCanvasEntity->Activate();
-                    }
-
-                    AZ_Assert(scriptCanvasEntity->GetState() == AZ::Entity::State::Active, "Graph entity is not active");
-                    auto graphComponent = scriptCanvasEntity->FindComponent<ScriptCanvasEditor::Graph>();
-                    AZ_Assert(graphComponent, "The Script Canvas entity must have a Graph component");
-                    if (graphComponent)
-                    {
-                        graphComponent->UpgradeGraph
-                        (asset
-                            , m_view->forceUpgrade->isChecked() ? Graph::UpgradeRequest::Forced : Graph::UpgradeRequest::IfOutOfDate
-                            , m_view->verbose->isChecked());
-                    }
+                    asset.Mod()->UpgradeGraph
+                        ( asset
+                        , m_view->forceUpgrade->isChecked() ? Graph::UpgradeRequest::Forced : Graph::UpgradeRequest::IfOutOfDate
+                        , m_view->verbose->isChecked());
                 }
             };
 
@@ -216,7 +165,7 @@ namespace ScriptCanvasEditor
             {
                 int result = QMessageBox::No;
                 QMessageBox mb
-                (QMessageBox::Warning
+                    ( QMessageBox::Warning
                     , QObject::tr("Failed to Save Upgraded File")
                     , QObject::tr("The upgraded file could not be saved because the file is read only.\n"
                         "Do you want to make it writeable and overwrite it?")
@@ -235,12 +184,12 @@ namespace ScriptCanvasEditor
             ModelRequestsBus::Broadcast(&ModelRequestsTraits::Modify, config);
         }
 
-        void Controller::OnButtonPressUpgradeSingle(const AZ::Data::AssetInfo& assetInfo)
+        void Controller::OnButtonPressUpgradeSingle(const SourceHandle& info)
         {
-            OnButtonPressUpgradeImplementation(assetInfo);
+            OnButtonPressUpgradeImplementation(info);
         }
 
-        void Controller::OnUpgradeModificationBegin([[maybe_unused]] const ModifyConfiguration& config, const AZ::Data::AssetInfo& info)
+        void Controller::OnUpgradeModificationBegin([[maybe_unused]] const ModifyConfiguration& config, const SourceHandle& info)
         {
             for (auto* item : FindTableItems(info))
             {
@@ -252,16 +201,16 @@ namespace ScriptCanvasEditor
 
         void Controller::OnUpgradeModificationEnd
             ( [[maybe_unused]] const ModifyConfiguration& config
-            , const AZ::Data::AssetInfo& info
+            , const SourceHandle& info
             , ModificationResult result)
         {
             if (result.errorMessage.empty())
             {
-                VE_LOG("Successfully modified %s", result.assetInfo.m_relativePath.c_str());
+                VE_LOG("Successfully modified %s", result.asset.Path().c_str());
             }
             else
             {
-                VE_LOG("Failed to modify %s: %s", result.assetInfo.m_relativePath.c_str(), result.errorMessage.data());
+                VE_LOG("Failed to modify %s: %s", result.asset.Path().c_str(), result.errorMessage.data());
             }
 
             for (auto* item : FindTableItems(info))
@@ -289,12 +238,10 @@ namespace ScriptCanvasEditor
             AddLogEntries();
         }
 
-        void Controller::OnGraphUpgradeComplete(AZ::Data::Asset<AZ::Data::AssetData>& asset, bool skipped)
+        void Controller::OnGraphUpgradeComplete(ScriptCanvasEditor::SourceHandle& asset, bool skipped)
         {
             ModificationResult result;
             result.asset = asset;
-            AZ::Data::AssetCatalogRequestBus::BroadcastResult
-                ( result.assetInfo, &AZ::Data::AssetCatalogRequests::GetAssetInfoById, asset.GetId());
 
             if (skipped)
             {
@@ -342,19 +289,19 @@ namespace ScriptCanvasEditor
             }
         }
 
-        void Controller::OnScanFilteredGraph(const AZ::Data::AssetInfo& info)
+        void Controller::OnScanFilteredGraph(const SourceHandle& info)
         {
             OnScannedGraph(info, Filtered::Yes);
         }
 
-        void Controller::OnScannedGraph(const AZ::Data::AssetInfo& assetInfo, [[maybe_unused]] Filtered filtered)
+        void Controller::OnScannedGraph(const SourceHandle& assetInfo, [[maybe_unused]] Filtered filtered)
         {
             const int rowIndex = m_view->tableWidget->rowCount();
 
             if (filtered == Filtered::No || !m_view->onlyShowOutdated->isChecked())
             {
                 m_view->tableWidget->insertRow(rowIndex);
-                QTableWidgetItem* rowName = new QTableWidgetItem(tr(assetInfo.m_relativePath.c_str()));
+                QTableWidgetItem* rowName = new QTableWidgetItem(tr(assetInfo.Path().c_str()));
                 m_view->tableWidget->setItem(rowIndex, static_cast<int>(ColumnAsset), rowName);
                 SetRowSucceeded(rowIndex);
 
@@ -376,17 +323,11 @@ namespace ScriptCanvasEditor
 
                     m_view->tableWidget->setCellWidget(rowIndex, static_cast<int>(ColumnAction), upgradeButton);
                 }
-
-                char resolvedBuffer[AZ_MAX_PATH_LEN] = { 0 };
-                AZStd::string path = AZStd::string::format("@devroot@/%s", assetInfo.m_relativePath.c_str());
-                AZ::IO::FileIOBase::GetInstance()->ResolvePath(path.c_str(), resolvedBuffer, AZ_MAX_PATH_LEN);
-                AZ::StringFunc::Path::GetFullPath(resolvedBuffer, path);
-                AZ::StringFunc::Path::Normalize(path);
-
+                                
                 bool result = false;
                 AZ::Data::AssetInfo info;
                 AZStd::string watchFolder;
-                QByteArray assetNameUtf8 = assetInfo.m_relativePath.c_str();
+                QByteArray assetNameUtf8 = assetInfo.Path().c_str();
                 AzToolsFramework::AssetSystemRequestBus::BroadcastResult
                     ( result
                     , &AzToolsFramework::AssetSystemRequestBus::Events::GetSourceInfoBySourcePath
@@ -413,41 +354,41 @@ namespace ScriptCanvasEditor
             OnScannedGraphResult(assetInfo);
         }
 
-        void Controller::OnScannedGraphResult([[maybe_unused]] const AZ::Data::AssetInfo& info)
+        void Controller::OnScannedGraphResult([[maybe_unused]] const SourceHandle& info)
         {
             m_view->progressBar->setValue(aznumeric_cast<int>(m_handledAssetCount));
             ++m_handledAssetCount;
             AddLogEntries();
         }
 
-        void Controller::OnScanLoadFailure(const AZ::Data::AssetInfo& info)
+        void Controller::OnScanLoadFailure(const SourceHandle& info)
         {
             const int rowIndex = m_view->tableWidget->rowCount();
             m_view->tableWidget->insertRow(rowIndex);
             QTableWidgetItem* rowName = new QTableWidgetItem
-                ( tr(AZStd::string::format("Load Error: %s", info.m_relativePath.c_str()).c_str()));
+                ( tr(AZStd::string::format("Load Error: %s", info.Path().c_str()).c_str()));
             m_view->tableWidget->setItem(rowIndex, static_cast<int>(ColumnAsset), rowName);
             SetRowFailed(rowIndex, "Load failed");
             OnScannedGraphResult(info);
         }
 
-        void Controller::OnScanUnFilteredGraph(const AZ::Data::AssetInfo& info)
+        void Controller::OnScanUnFilteredGraph(const SourceHandle& info)
         {
             OnScannedGraph(info, Filtered::No);
         }
 
         void Controller::OnUpgradeBegin
             ( const ModifyConfiguration& config
-            , [[maybe_unused]] const WorkingAssets& assets)
+            , [[maybe_unused]] const AZStd::vector<SourceHandle>& assets)
         {
             QString spinnerText = QStringLiteral("Upgrade in progress - ");
-            if (config.modifySingleAsset.m_assetId.IsValid())
+            if (!config.modifySingleAsset.Path().empty())
             {
                 spinnerText.append(" single graph");
 
                 if (assets.size() == 1)
                 {
-                    for (auto* item : FindTableItems(assets.front().info))
+                    for (auto* item : FindTableItems(assets.front()))
                     {
                         int row = item->row();
                         SetRowBusy(row);
@@ -498,7 +439,7 @@ namespace ScriptCanvasEditor
             m_view->scanButton->setEnabled(true);
         }
 
-        void Controller::OnUpgradeDependenciesGathered(const AZ::Data::AssetInfo& info, Result result)
+        void Controller::OnUpgradeDependenciesGathered(const SourceHandle& info, Result result)
         {
             for (auto* item : FindTableItems(info))
             {
@@ -527,7 +468,7 @@ namespace ScriptCanvasEditor
 
         void Controller::OnUpgradeDependencySortBegin
             ( [[maybe_unused]] const ModifyConfiguration& config
-            , const WorkingAssets& assets)
+            , const AZStd::vector<SourceHandle>& assets)
         {
             m_handledAssetCount = 0;
             m_view->progressBar->setVisible(true);
@@ -553,7 +494,7 @@ namespace ScriptCanvasEditor
 
         void Controller::OnUpgradeDependencySortEnd
             ( [[maybe_unused]] const ModifyConfiguration& config
-            , const WorkingAssets& assets
+            , const AZStd::vector<SourceHandle>& assets
             , [[maybe_unused]] const AZStd::vector<size_t>& sortedOrder)
         {
             m_handledAssetCount = 0;

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Controller.h

@@ -65,36 +65,36 @@ namespace ScriptCanvasEditor
 
             void AddLogEntries();
             void EnableAllUpgradeButtons();
-            QList<QTableWidgetItem*> FindTableItems(const AZ::Data::AssetInfo& assetInfo);
+            QList<QTableWidgetItem*> FindTableItems(const SourceHandle& assetInfo);
 
             void OnButtonPressClose();
             void OnButtonPressScan();
             void OnButtonPressUpgrade();
-            void OnButtonPressUpgradeImplementation(const AZ::Data::AssetInfo& assetInfo);
-            void OnButtonPressUpgradeSingle(const AZ::Data::AssetInfo& assetInfo);
+            void OnButtonPressUpgradeImplementation(const SourceHandle& assetInfo);
+            void OnButtonPressUpgradeSingle(const SourceHandle& assetInfo);
 
-            void OnGraphUpgradeComplete(AZ::Data::Asset<AZ::Data::AssetData>&, bool skipped) override;
+            void OnGraphUpgradeComplete(SourceHandle&, bool skipped) override;
                         
             void OnScanBegin(size_t assetCount) override;
             void OnScanComplete(const ScanResult& result) override;
-            void OnScanFilteredGraph(const AZ::Data::AssetInfo& info) override;
-            void OnScanLoadFailure(const AZ::Data::AssetInfo& info) override;
-            void OnScanUnFilteredGraph(const AZ::Data::AssetInfo& info) override;
+            void OnScanFilteredGraph(const SourceHandle& info) override;
+            void OnScanLoadFailure(const SourceHandle& info) override;
+            void OnScanUnFilteredGraph(const SourceHandle& info) override;
             enum class Filtered { No, Yes };
-            void OnScannedGraph(const AZ::Data::AssetInfo& info, Filtered filtered);
-            void OnScannedGraphResult(const AZ::Data::AssetInfo& info);
+            void OnScannedGraph(const SourceHandle& info, Filtered filtered);
+            void OnScannedGraphResult(const SourceHandle& info);
 
             // for single operation UI updates, just check the assets size, or note it on the request
-            void OnUpgradeBegin(const ModifyConfiguration& config, const WorkingAssets& assets) override;
+            void OnUpgradeBegin(const ModifyConfiguration& config, const AZStd::vector<SourceHandle>& assets) override;
             void OnUpgradeComplete(const ModificationResults& results) override;
-            void OnUpgradeDependenciesGathered(const AZ::Data::AssetInfo& info, Result result) override;
-            void OnUpgradeDependencySortBegin(const ModifyConfiguration& config, const WorkingAssets& assets) override;
+            void OnUpgradeDependenciesGathered(const SourceHandle& info, Result result) override;
+            void OnUpgradeDependencySortBegin(const ModifyConfiguration& config, const AZStd::vector<SourceHandle>& assets) override;
             void OnUpgradeDependencySortEnd
                 ( const ModifyConfiguration& config
-                , const WorkingAssets& assets
+                , const AZStd::vector<SourceHandle>& assets
                 , const AZStd::vector<size_t>& sortedOrder) override;
-            void OnUpgradeModificationBegin(const ModifyConfiguration& config, const AZ::Data::AssetInfo& info) override;
-            void OnUpgradeModificationEnd(const ModifyConfiguration& config, const AZ::Data::AssetInfo& info, ModificationResult result) override;
+            void OnUpgradeModificationBegin(const ModifyConfiguration& config, const SourceHandle& info) override;
+            void OnUpgradeModificationEnd(const ModifyConfiguration& config, const SourceHandle& info, ModificationResult result) override;
 
             void SetLoggingPreferences();
             void SetSpinnerIsBusy(bool isBusy);

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/FileSaver.cpp

@@ -15,6 +15,7 @@
 #include <AzToolsFramework/SourceControl/SourceControlAPI.h>
 #include <Editor/View/Windows/Tools/UpgradeTool/FileSaver.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAssetHandler.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 
 namespace FileSaverCpp
 {
@@ -58,6 +59,11 @@ namespace ScriptCanvasEditor
             , m_onComplete(onComplete)
         {}
 
+        const SourceHandle& FileSaver::GetSource() const
+        {
+            return m_source;
+        }
+
         void FileSaver::PerformMove
             ( AZStd::string tmpFileName
             , AZStd::string target
@@ -70,7 +76,7 @@ namespace ScriptCanvasEditor
                 AZ::SystemTickBus::QueueFunction([this, tmpFileName]()
                     {
                         FileSaveResult result;
-                        result.fileSaveError = "Failed to move updated file from temporary location to tmpFileName destination";
+                        result.fileSaveError = "Failed to move updated file from temporary location to original destination.";
                         result.tempFileRemovalError = RemoveTempFile(tmpFileName);
                         m_onComplete(result);
                     });
@@ -98,7 +104,9 @@ namespace ScriptCanvasEditor
                     auto streamer = AZ::Interface<AZ::IO::IStreamer>::Get();
                     AZ::IO::FileRequestPtr flushRequest = streamer->FlushCache(target.c_str());
                     // Bump the slice asset up in the asset processor's queue.
-                    AzFramework::AssetSystemRequestBus::Broadcast(&AzFramework::AssetSystem::AssetSystemRequests::EscalateAssetBySearchTerm, target.c_str());
+                    AzFramework::AssetSystemRequestBus::Broadcast
+                        (&AzFramework::AssetSystem::AssetSystemRequests::EscalateAssetBySearchTerm, target.c_str());
+                    
                     AZ::SystemTickBus::QueueFunction([this, tmpFileName]()
                         {
                             FileSaveResult result;
@@ -108,28 +116,29 @@ namespace ScriptCanvasEditor
                 }
                 else
                 {
-                    AZ_Warning(ScriptCanvas::k_VersionExplorerWindow.data(), false, "moving converted file to tmpFileName destination failed: %s, trying again", target.c_str());
+                    AZ_Warning(ScriptCanvas::k_VersionExplorerWindow.data(), false
+                        , "moving converted file to tmpFileName destination failed: %s, trying again", target.c_str());
                     auto streamer = AZ::Interface<AZ::IO::IStreamer>::Get();
                     AZ::IO::FileRequestPtr flushRequest = streamer->FlushCache(target.c_str());
-                    streamer->SetRequestCompleteCallback(flushRequest, [this, tmpFileName, target, remainingAttempts]([[maybe_unused]] AZ::IO::FileRequestHandle request)
+                    streamer->SetRequestCompleteCallback(flushRequest
+                    , [this, tmpFileName, target, remainingAttempts]([[maybe_unused]] AZ::IO::FileRequestHandle request)
                     {
                         // Continue saving.
-                        AZ::SystemTickBus::QueueFunction([this, tmpFileName, target, remainingAttempts]() { PerformMove(tmpFileName, target, remainingAttempts - 1); });
+                        AZ::SystemTickBus::QueueFunction(
+                            [this, tmpFileName, target, remainingAttempts]() { PerformMove(tmpFileName, target, remainingAttempts - 1); });
                     });
                     streamer->QueueRequest(flushRequest);
                 }
             }
         }
 
-        void FileSaver::OnSourceFileReleased(AZ::Data::Asset<AZ::Data::AssetData> asset)
+        void FileSaver::OnSourceFileReleased(const SourceHandle& source)
         {
-            AZStd::string relativePath, fullPath;
-            AZ::Data::AssetCatalogRequestBus::BroadcastResult(relativePath, &AZ::Data::AssetCatalogRequests::GetAssetPathById, asset.GetId());
-            bool fullPathFound = false;
-            AzToolsFramework::AssetSystemRequestBus::BroadcastResult(fullPathFound, &AzToolsFramework::AssetSystemRequestBus::Events::GetFullSourcePathFromRelativeProductPath, relativePath, fullPath);
+            AZStd::string fullPath = source.Path().c_str();
             AZStd::string tmpFileName;
             // here we are saving the graph to a temp file instead of the original file and then copying the temp file to the original file.
-            // This ensures that AP will not a get a file change notification on an incomplete graph file causing it to fail processing. Temp files are ignored by AP.
+            // This ensures that AP will not a get a file change notification on an incomplete graph file causing it to fail processing.
+            // Temp files are ignored by AP.
             if (!AZ::IO::CreateTempFileName(fullPath.c_str(), tmpFileName))
             {
                 FileSaveResult result;
@@ -138,23 +147,24 @@ namespace ScriptCanvasEditor
                 return;
             }
 
-            bool tempSavedSucceeded = false;
+            AZStd::string saveError;
+
             AZ::IO::FileIOStream fileStream(tmpFileName.c_str(), AZ::IO::OpenMode::ModeWrite | AZ::IO::OpenMode::ModeText);
             if (fileStream.IsOpen())
             {
-                if (asset.GetType() == azrtti_typeid<ScriptCanvasEditor::ScriptCanvasAsset>())
+                auto saveOutcome = ScriptCanvasEditor::SaveToStream(source, fileStream);
+                if (!saveOutcome.IsSuccess())
                 {
-                    ScriptCanvasEditor::ScriptCanvasAssetHandler handler;
-                    tempSavedSucceeded = handler.SaveAssetData(asset, &fileStream);
+                    saveError = saveOutcome.TakeError();
                 }
 
                 fileStream.Close();
             }
 
-            if (!tempSavedSucceeded)
+            if (!saveError.empty())
             {
                 FileSaveResult result;
-                result.fileSaveError = "Save asset data to temporary file failed";
+                result.fileSaveError = AZStd::string::format("Save asset data to temporary file failed: %s", saveError.c_str());
                 m_onComplete(result);
                 return;
             }
@@ -164,26 +174,26 @@ namespace ScriptCanvasEditor
                 , fullPath.c_str()
                 , true
                 , [this, fullPath, tmpFileName]([[maybe_unused]] bool success, const AzToolsFramework::SourceControlFileInfo& info)
-                {
-                    constexpr const size_t k_maxAttemps = 10;
+            {
+                constexpr const size_t k_maxAttemps = 10;
 
-                    if (!info.IsReadOnly())
-                    {
-                        PerformMove(tmpFileName, fullPath, k_maxAttemps);
-                    }
-                    else if (m_onReadOnlyFile && m_onReadOnlyFile())
-                    {
-                        AZ::IO::SystemFile::SetWritable(info.m_filePath.c_str(), true);
-                        PerformMove(tmpFileName, fullPath, k_maxAttemps);
-                    }
-                    else
-                    {
-                        FileSaveResult result;
-                        result.fileSaveError = "Source file was and remained read-only";
-                        result.tempFileRemovalError = RemoveTempFile(tmpFileName);
-                        m_onComplete(result);
-                    }
-                });
+                if (!info.IsReadOnly())
+                {
+                    PerformMove(tmpFileName, fullPath, k_maxAttemps);
+                }
+                else if (m_onReadOnlyFile && m_onReadOnlyFile())
+                {
+                    AZ::IO::SystemFile::SetWritable(info.m_filePath.c_str(), true);
+                    PerformMove(tmpFileName, fullPath, k_maxAttemps);
+                }
+                else
+                {
+                    FileSaveResult result;
+                    result.fileSaveError = "Source file was and remained read-only";
+                    result.tempFileRemovalError = RemoveTempFile(tmpFileName);
+                    m_onComplete(result);
+                }
+            });
         }
 
         AZStd::string FileSaver::RemoveTempFile(AZStd::string_view tempFile)
@@ -191,7 +201,7 @@ namespace ScriptCanvasEditor
             AZ::IO::FileIOBase* fileIO = AZ::IO::FileIOBase::GetInstance();
             if (!fileIO)
             {
-                return "GraphUpgradeComplete: No FileIO instance";
+                return "No FileIO instance";
             }
 
             if (fileIO->Exists(tempFile.data()) && !fileIO->Remove(tempFile.data()))
@@ -202,30 +212,30 @@ namespace ScriptCanvasEditor
             return "";
         }
 
-        void FileSaver::Save(AZ::Data::Asset<AZ::Data::AssetData> asset)
+        void FileSaver::Save(const SourceHandle& source)
         {
-            AZStd::string relativePath, fullPath;
-            AZ::Data::AssetCatalogRequestBus::BroadcastResult(relativePath, &AZ::Data::AssetCatalogRequests::GetAssetPathById, asset.GetId());
-            bool fullPathFound = false;
-            AzToolsFramework::AssetSystemRequestBus::BroadcastResult
-            (fullPathFound
-                , &AzToolsFramework::AssetSystemRequestBus::Events::GetFullSourcePathFromRelativeProductPath
-                , relativePath, fullPath);
+            m_source = source;
 
-            if (!fullPathFound)
+            if (source.Path().empty())
             {
                 FileSaveResult result;
-                result.fileSaveError = "Full source path not found";
+                result.fileSaveError = "No save location specified";
                 m_onComplete(result);
             }
             else
             {
                 auto streamer = AZ::Interface<AZ::IO::IStreamer>::Get();
-                AZ::IO::FileRequestPtr flushRequest = streamer->FlushCache(fullPath);
-                streamer->SetRequestCompleteCallback(flushRequest, [this, asset]([[maybe_unused]] AZ::IO::FileRequestHandle request)
+                AZ::IO::FileRequestPtr flushRequest = streamer->FlushCache(source.Path().c_str());
+                streamer->SetRequestCompleteCallback(flushRequest, [this]([[maybe_unused]] AZ::IO::FileRequestHandle request)
                 {
-                    this->OnSourceFileReleased(asset);
+                    AZStd::lock_guard<AZStd::mutex> lock(m_mutex);
+                    if (!m_sourceFileReleased)
+                    {
+                        m_sourceFileReleased = true;
+                        AZ::SystemTickBus::QueueFunction([this]() { this->OnSourceFileReleased(m_source); });
+                    }
                 });
+
                 streamer->QueueRequest(flushRequest);
             }
         }

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/FileSaver.h

@@ -29,14 +29,19 @@ namespace ScriptCanvasEditor
                 ( AZStd::function<bool()> onReadOnlyFile
                 , AZStd::function<void(const FileSaveResult& result)> onComplete);
 
-            void Save(AZ::Data::Asset<AZ::Data::AssetData> asset);
+            const SourceHandle& GetSource() const;
+            void Save(const SourceHandle& source);
 
         private:
+            AZStd::mutex m_mutex;
+
+            bool m_sourceFileReleased = false;
+            SourceHandle m_source;
             AZStd::function<void(const FileSaveResult& result)> m_onComplete;
             AZStd::function<bool()> m_onReadOnlyFile;
 
-            void OnSourceFileReleased(AZ::Data::Asset<AZ::Data::AssetData> asset);
-
+            void OnSourceFileReleased(const SourceHandle& source);
+            
             void PerformMove
                 ( AZStd::string source
                 , AZStd::string target

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Model.cpp

@@ -101,7 +101,7 @@ namespace ScriptCanvasEditor
                 return;
             }
 
-            if (modification.modifySingleAsset.m_assetId.IsValid())
+            if (!modification.modifySingleAsset.Path().empty())
             {
                 const auto& results = m_scanner->GetResult();
                 auto iter = AZStd::find_if
@@ -109,7 +109,7 @@ namespace ScriptCanvasEditor
                     , results.m_unfiltered.end()
                     , [&modification](const auto& candidate)
                     {
-                        return candidate.info.m_assetId == modification.modifySingleAsset.m_assetId;
+                        return candidate.AnyEquals(modification.modifySingleAsset);
                     });
 
                 if (iter == results.m_unfiltered.end())
@@ -120,7 +120,7 @@ namespace ScriptCanvasEditor
 
 
                 m_state = State::ModifySingle;
-                m_modifier = AZStd::make_unique<Modifier>(modification, WorkingAssets{ *iter }, [this]() { OnModificationComplete(); });
+                m_modifier = AZStd::make_unique<Modifier>(modification, AZStd::vector<SourceHandle>{ *iter }, [this]() { OnModificationComplete(); });
             }
             else
             {

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/ModelTraits.h

@@ -9,53 +9,51 @@
 
 #include <AzCore/EBus/EBus.h>
 #include <AzCore/Asset/AssetManagerBus.h>
+#include <ScriptCanvas/Core/Core.h>
 
 namespace ScriptCanvasEditor
 {
     namespace VersionExplorer
     {
-        struct WorkingAsset
-        {
-            AZ::Data::Asset<AZ::Data::AssetData> asset;
-            AZ::Data::AssetInfo info;
-        };
-
-        using WorkingAssets = AZStd::vector<WorkingAsset>;
-
         struct ModifyConfiguration
         {
-            AZStd::function<void(AZ::Data::Asset<AZ::Data::AssetData>)> modification;
+            AZStd::function<void(SourceHandle&)> modification;
             AZStd::function<bool()> onReadOnlyFile;
-            AZ::Data::AssetInfo modifySingleAsset;
+            SourceHandle modifySingleAsset;
             bool backupGraphBeforeModification = false;
             bool successfulDependencyUpgradeRequired = true;
         };
 
         struct ModificationResult
         {
-            AZ::Data::Asset<AZ::Data::AssetData> asset;
-            AZ::Data::AssetInfo assetInfo;
+            SourceHandle asset;
             AZStd::string errorMessage;
         };
 
         struct ModificationResults
         {
-            AZStd::vector<AZ::Data::AssetInfo> m_successes;
+            AZStd::vector<SourceHandle> m_successes;
             AZStd::vector<ModificationResult> m_failures;
         };
 
         struct ScanConfiguration
         {
-            AZStd::function<bool(AZ::Data::Asset<AZ::Data::AssetData>)> filter;
+            enum class Filter
+            {
+                Include,
+                Exclude
+            };
+
+            AZStd::function<Filter(const SourceHandle&)> filter;
             bool reportFilteredGraphs = false;
         };
 
         struct ScanResult
         {
-            AZStd::vector<AZ::Data::AssetInfo> m_catalogAssets;
-            WorkingAssets m_unfiltered;
-            AZStd::vector<AZ::Data::AssetInfo> m_filteredAssets;
-            AZStd::vector<AZ::Data::AssetInfo> m_loadErrors;
+            AZStd::vector<SourceHandle> m_catalogAssets;
+            AZStd::vector<SourceHandle> m_unfiltered;
+            AZStd::vector<SourceHandle> m_filteredAssets;
+            AZStd::vector<SourceHandle> m_loadErrors;
         };
 
         enum Result
@@ -88,20 +86,20 @@ namespace ScriptCanvasEditor
         public:
             virtual void OnScanBegin(size_t assetCount) = 0;
             virtual void OnScanComplete(const ScanResult& result) = 0;
-            virtual void OnScanFilteredGraph(const AZ::Data::AssetInfo& info) = 0;
-            virtual void OnScanLoadFailure(const AZ::Data::AssetInfo& info) = 0;
-            virtual void OnScanUnFilteredGraph(const AZ::Data::AssetInfo& info) = 0;
+            virtual void OnScanFilteredGraph(const SourceHandle& info) = 0;
+            virtual void OnScanLoadFailure(const SourceHandle& info) = 0;
+            virtual void OnScanUnFilteredGraph(const SourceHandle& info) = 0;
 
-            virtual void OnUpgradeBegin(const ModifyConfiguration& config, const WorkingAssets& assets) = 0;
+            virtual void OnUpgradeBegin(const ModifyConfiguration& config, const AZStd::vector<SourceHandle>& assets) = 0;
             virtual void OnUpgradeComplete(const ModificationResults& results) = 0;
-            virtual void OnUpgradeDependenciesGathered(const AZ::Data::AssetInfo& info, Result result) = 0;
-            virtual void OnUpgradeDependencySortBegin(const ModifyConfiguration& config, const WorkingAssets& assets) = 0;
+            virtual void OnUpgradeDependenciesGathered(const SourceHandle& info, Result result) = 0;
+            virtual void OnUpgradeDependencySortBegin(const ModifyConfiguration& config, const AZStd::vector<SourceHandle>& assets) = 0;
             virtual void OnUpgradeDependencySortEnd
                 ( const ModifyConfiguration& config
-                , const WorkingAssets& assets
+                , const AZStd::vector<SourceHandle>& assets
                 , const AZStd::vector<size_t>& sortedOrder) = 0;
-            virtual void OnUpgradeModificationBegin(const ModifyConfiguration& config, const AZ::Data::AssetInfo& info) = 0;
-            virtual void OnUpgradeModificationEnd(const ModifyConfiguration& config, const AZ::Data::AssetInfo& info, ModificationResult result) = 0;
+            virtual void OnUpgradeModificationBegin(const ModifyConfiguration& config, const SourceHandle& info) = 0;
+            virtual void OnUpgradeModificationEnd(const ModifyConfiguration& config, const SourceHandle& info, ModificationResult result) = 0;
         };
         using ModelNotificationsBus = AZ::EBus<ModelNotificationsTraits>;
     }

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Modifier.cpp

@@ -6,24 +6,21 @@
  *
  */
 
+#include <Editor/Include/ScriptCanvas/Components/EditorGraph.h>
 #include <Editor/View/Windows/Tools/UpgradeTool/LogTraits.h>
 #include <Editor/View/Windows/Tools/UpgradeTool/Modifier.h>
 #include <ScriptCanvas/Asset/RuntimeAsset.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAsset.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
 #include <ScriptCanvas/Core/Graph.h>
 
-namespace ModifierCpp
-{
-
-}
-
 namespace ScriptCanvasEditor
 {
     namespace VersionExplorer
     {
         Modifier::Modifier
             ( const ModifyConfiguration& modification
-            , WorkingAssets&& assets
+            , AZStd::vector<SourceHandle>&& assets
             , AZStd::function<void()> onComplete)
             : m_state(State::GatheringDependencies)
             , m_config(modification)
@@ -35,11 +32,12 @@ namespace ScriptCanvasEditor
             AZ::SystemTickBus::Handler::BusConnect();
         }
 
-        const AZ::Data::AssetInfo& Modifier::GetCurrentAsset() const
+        size_t Modifier::GetCurrentIndex() const
         {
             return m_state == State::GatheringDependencies
-                ? m_assets[m_assetIndex].info
-                : m_assets[m_dependencyOrderedAssetIndicies[m_assetIndex]].info;
+                ? m_assetIndex
+                : m_dependencyOrderedAssetIndicies[m_assetIndex];
+
         }
 
         AZStd::unordered_set<size_t>& Modifier::GetOrCreateDependencyIndexSet()
@@ -65,14 +63,10 @@ namespace ScriptCanvasEditor
             AZ_Assert(serializeContext, "SerializeContext is required to enumerate dependent assets in the ScriptCanvas file");
 
             bool anyFailures = false;
-            auto asset = LoadAsset();
 
-            if (asset
-            && asset.GetAs<ScriptCanvasAsset>()
-            && asset.GetAs<ScriptCanvasAsset>()->GetScriptCanvasGraph()
-            && asset.GetAs<ScriptCanvasAsset>()->GetScriptCanvasGraph()->GetGraphData())
+            if (m_result.asset.Get() && m_result.asset.Mod()->GetGraphData())
             {
-                auto graphData = asset.GetAs<ScriptCanvasAsset>()->GetScriptCanvasGraph()->GetGraphData();
+                auto graphData = m_result.asset.Mod()->GetGraphData();
 
                 auto dependencyGrabber = [this]
                     ( void* instancePointer
@@ -107,71 +101,69 @@ namespace ScriptCanvasEditor
                     , nullptr))
                 {
                     anyFailures = true;
-                    VE_LOG("Modifier: ERROR - Failed to gather dependencies from graph data: %s"
-                        , GetCurrentAsset().m_relativePath.c_str())
+                        VE_LOG("Modifier: ERROR - Failed to gather dependencies from graph data: %s"
+                        , m_result.asset.Path().c_str())
                 }
             }
             else
             {
                 anyFailures = true;
                 VE_LOG("Modifier: ERROR - Failed to load asset %s for modification, even though it scanned properly"
-                    , GetCurrentAsset().m_relativePath.c_str());
+                    , m_result.asset.Path().c_str());
             }
             
             ModelNotificationsBus::Broadcast
                 ( &ModelNotificationsTraits::OnUpgradeDependenciesGathered
-                , GetCurrentAsset()
+                , m_result.asset
                 , anyFailures ? Result::Failure : Result::Success);
 
+            ReleaseCurrentAsset();
+
             // Flush asset database events to ensure no asset references are held by closures queued on Ebuses.
             AZ::Data::AssetManager::Instance().DispatchEvents();
         }
 
-        AZ::Data::Asset<AZ::Data::AssetData> Modifier::LoadAsset()
+        void Modifier::LoadAsset()
         {
-            AZ::Data::Asset<AZ::Data::AssetData> asset = AZ::Data::AssetManager::Instance().GetAsset
-                ( GetCurrentAsset().m_assetId
-                , azrtti_typeid<ScriptCanvasAsset>()
-                , AZ::Data::AssetLoadBehavior::PreLoad);
-
-            asset.BlockUntilLoadComplete();
-
-            if (asset.IsReady())
+            auto& handle = m_result.asset;
+            if (!handle.IsGraphValid())
             {
-                return asset;
-            }
-            else
-            {
-                return {};
+                auto outcome = LoadFromFile(handle.Path().c_str());
+                if (outcome.IsSuccess())
+                {
+                    handle = outcome.TakeValue();
+                }
             }
         }
 
         void Modifier::ModificationComplete(const ModificationResult& result)
         {
-            m_result = result;
-
-            if (result.errorMessage.empty())
+            if (!result.errorMessage.empty())
             {
-                SaveModifiedGraph(result);
+                ReportModificationError(result.errorMessage);
+            }
+            else if (m_result.asset.Describe() != result.asset.Describe())
+            {
+                ReportModificationError("Received modifiction complete notification for different result");
             }
             else
             {
-                ReportModificationError(result.errorMessage);
+                SaveModifiedGraph(result);
             }
         }
 
         void Modifier::ModifyCurrentAsset()
         {
             m_result = {};
-            m_result.assetInfo = GetCurrentAsset();
+            m_result.asset = m_assets[GetCurrentIndex()];
+            ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnUpgradeModificationBegin, m_config, m_result.asset);
+            LoadAsset();
 
-            ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnUpgradeModificationBegin, m_config, GetCurrentAsset());
-
-            if (auto asset = LoadAsset())
+            if (m_result.asset.IsGraphValid())
             {
                 ModificationNotificationsBus::Handler::BusConnect();
                 m_modifyState = ModifyState::InProgress;
-                m_config.modification(asset);
+                m_config.modification(m_result.asset);
             }
             else
             {
@@ -182,24 +174,30 @@ namespace ScriptCanvasEditor
         void Modifier::ModifyNextAsset()
         {
             ModelNotificationsBus::Broadcast
-                ( &ModelNotificationsTraits::OnUpgradeModificationEnd, m_config, GetCurrentAsset(), m_result);
+                ( &ModelNotificationsTraits::OnUpgradeModificationEnd, m_config, m_result.asset, m_result);
             ModificationNotificationsBus::Handler::BusDisconnect();
             m_modifyState = ModifyState::Idle;
+            ReleaseCurrentAsset();
             ++m_assetIndex;
             m_result = {};
         }
 
+        void Modifier::ReleaseCurrentAsset()
+        {
+            m_result.asset = m_result.asset.Describe();
+        }
+
         void Modifier::ReportModificationError(AZStd::string_view report)
         {
-            m_result.asset = {};
             m_result.errorMessage = report;
-            m_results.m_failures.push_back(m_result);
+            m_results.m_failures.push_back({ m_result.asset.Describe(), report });
             ModifyNextAsset();
         }
 
         void Modifier::ReportModificationSuccess()
         {
-            m_results.m_successes.push_back(m_result.assetInfo);
+            m_result.asset = m_result.asset.Describe();
+            m_results.m_successes.push_back({ m_result.asset.Describe(), {} });
             ModifyNextAsset();
         }
 
@@ -227,7 +225,7 @@ namespace ScriptCanvasEditor
             {
                 VE_LOG
                     ( "Temporary file not removed for %s: %s"
-                    , m_result.assetInfo.m_relativePath.c_str()
+                    , m_result.asset.Path().c_str()
                     , result.tempFileRemovalError.c_str());
             }
 
@@ -259,7 +257,7 @@ namespace ScriptCanvasEditor
             m_modifyState = ModifyState::Saving;
             m_fileSaver = AZStd::make_unique<FileSaver>
                     ( m_config.onReadOnlyFile
-                    , [this](const FileSaveResult& result) { OnFileSaveComplete(result); });
+                    , [this](const FileSaveResult& fileSaveResult) { OnFileSaveComplete(fileSaveResult); });
             m_fileSaver->Save(result.asset);
         }
 
@@ -287,7 +285,7 @@ namespace ScriptCanvasEditor
 
                     for (size_t index = 0; index != m_assets.size(); ++index)
                     {
-                        m_assetInfoIndexById.insert({ m_assets[index].info.m_assetId.m_guid, index });
+                        m_assetInfoIndexById.insert({ m_assets[index].Id(), index });
                     }
                 }
                 else
@@ -299,7 +297,7 @@ namespace ScriptCanvasEditor
                         m_dependencyOrderedAssetIndicies.push_back(index);
                     }
 
-                    // go straight into ModifyinGraphs
+                    // go straight into ModifyingGraphs
                     m_assetIndex = m_assets.size();
                 }
             }
@@ -322,6 +320,7 @@ namespace ScriptCanvasEditor
             else
             {
                 GatherDependencies();
+                ReleaseCurrentAsset();
                 ++m_assetIndex;
             }
         }
@@ -380,10 +379,10 @@ namespace ScriptCanvasEditor
             if (markedTemporary.contains(index))
             {
                 AZ_Error
-                (ScriptCanvas::k_VersionExplorerWindow.data()
+                    (ScriptCanvas::k_VersionExplorerWindow.data()
                     , false
                     , "Modifier: Dependency sort has failed during, circular dependency detected for Asset: %s"
-                    , modifier->GetCurrentAsset().m_relativePath.c_str());
+                    , modifier->m_result.asset.Path().c_str());
                 return;
             }
 

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Modifier.h

@@ -26,7 +26,7 @@ namespace ScriptCanvasEditor
 
             Modifier
                 ( const ModifyConfiguration& modification
-                , WorkingAssets&& assets
+                , AZStd::vector<SourceHandle>&& assets
                 , AZStd::function<void()> onComplete);
 
             const ModificationResults& GetResult() const;
@@ -67,9 +67,10 @@ namespace ScriptCanvasEditor
             State m_state = State::GatheringDependencies;
             ModifyState m_modifyState = ModifyState::Idle;
             size_t m_assetIndex = 0;
+
             AZStd::function<void()> m_onComplete;
             // asset infos in scanned order
-            WorkingAssets m_assets;
+            AZStd::vector<SourceHandle> m_assets;
             // dependency sorted order indices into the asset vector
             AZStd::vector<size_t> m_dependencyOrderedAssetIndicies;
             // dependency indices by asset info index (only exist if graphs have them)
@@ -82,13 +83,14 @@ namespace ScriptCanvasEditor
             AZStd::unique_ptr<FileSaver> m_fileSaver;
             FileSaveResult m_fileSaveResult;
 
+            size_t GetCurrentIndex() const;
             void GatherDependencies();
-            const AZ::Data::AssetInfo& GetCurrentAsset() const;
             AZStd::unordered_set<size_t>& GetOrCreateDependencyIndexSet();
-            AZ::Data::Asset<AZ::Data::AssetData> LoadAsset();
+            void LoadAsset();
             void ModifyCurrentAsset();
             void ModifyNextAsset();
             void ModificationComplete(const ModificationResult& result) override;
+            void ReleaseCurrentAsset();
             void ReportModificationError(AZStd::string_view report);
             void ReportModificationSuccess();
             void ReportSaveResult();

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Scanner.cpp

@@ -6,9 +6,49 @@
  *
  */
 
+#include <AzToolsFramework/AssetBrowser/AssetBrowserBus.h>
+#include <AzToolsFramework/AssetBrowser/AssetBrowserEntry.h>
+#include <AzToolsFramework/AssetBrowser/AssetBrowserFilterModel.h>
+#include <AzToolsFramework/AssetBrowser/AssetBrowserModel.h>
+#include <Editor/View/Windows/Tools/UpgradeTool/LogTraits.h>
 #include <Editor/View/Windows/Tools/UpgradeTool/Scanner.h>
 #include <ScriptCanvas/Assets/ScriptCanvasAsset.h>
-#include <Editor/View/Windows/Tools/UpgradeTool/LogTraits.h>
+#include <ScriptCanvas/Assets/ScriptCanvasFileHandling.h>
+
+namespace ScannerCpp
+{
+    void TraverseTree
+        ( QModelIndex index
+        , AzToolsFramework::AssetBrowser::AssetBrowserFilterModel& model
+        , ScriptCanvasEditor::VersionExplorer::ScanResult& result)
+    {
+        QModelIndex sourceIndex = model.mapToSource(index);
+        AzToolsFramework::AssetBrowser::AssetBrowserEntry* entry =
+            reinterpret_cast<AzToolsFramework::AssetBrowser::AssetBrowserEntry*>(sourceIndex.internalPointer());
+
+        if (entry
+            && entry->GetEntryType() == AzToolsFramework::AssetBrowser::AssetBrowserEntry::AssetEntryType::Source
+            && azrtti_istypeof<const AzToolsFramework::AssetBrowser::SourceAssetBrowserEntry*>(entry)
+            && entry->GetFullPath().ends_with(".scriptcanvas"))
+        {
+            auto sourceEntry = azrtti_cast<const AzToolsFramework::AssetBrowser::SourceAssetBrowserEntry*>(entry);
+
+            AZStd::string fullPath = sourceEntry->GetFullPath();
+            AzFramework::StringFunc::Path::Normalize(fullPath);
+
+            result.m_catalogAssets.push_back(
+                ScriptCanvasEditor::SourceHandle(nullptr, sourceEntry->GetSourceUuid(), fullPath));
+        }
+
+        const int rowCount = model.rowCount(index);
+
+        for (int i = 0; i < rowCount; ++i)
+        {
+            TraverseTree(model.index(i, 0, index), model, result);
+        }
+    }
+}
+
 
 namespace ScriptCanvasEditor
 {
@@ -18,60 +58,54 @@ namespace ScriptCanvasEditor
             : m_config(config)
             , m_onComplete(onComplete)
         {
-            AZ::Data::AssetCatalogRequestBus::Broadcast
-                ( &AZ::Data::AssetCatalogRequestBus::Events::EnumerateAssets
-                , nullptr
-                , [this](const AZ::Data::AssetId, const AZ::Data::AssetInfo& assetInfo)
-                    {
-                        if (assetInfo.m_assetType == azrtti_typeid<ScriptCanvasAsset>())
-                        {
-                            m_result.m_catalogAssets.push_back(assetInfo);
-                        }
-                    }
-                , nullptr);
+            AzToolsFramework::AssetBrowser::AssetBrowserModel* assetBrowserModel = nullptr;
+            AzToolsFramework::AssetBrowser::AssetBrowserComponentRequestBus::BroadcastResult
+                ( assetBrowserModel, &AzToolsFramework::AssetBrowser::AssetBrowserComponentRequests::GetAssetBrowserModel);
+
+            if (assetBrowserModel)
+            {
+                auto stringFilter = new AzToolsFramework::AssetBrowser::StringFilter();
+                stringFilter->SetName("ScriptCanvas");
+                stringFilter->SetFilterString(".scriptcanvas");
+                stringFilter->SetFilterPropagation(AzToolsFramework::AssetBrowser::AssetBrowserEntryFilter::PropagateDirection::Down);
+
+                AzToolsFramework::AssetBrowser::AssetBrowserFilterModel assetFilterModel;
+                assetFilterModel.SetFilter(AzToolsFramework::AssetBrowser::FilterConstType(stringFilter));
+                assetFilterModel.setSourceModel(assetBrowserModel);
+
+                ScannerCpp::TraverseTree(QModelIndex(), assetFilterModel, m_result);
+            }
 
-            ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanBegin, m_result.m_catalogAssets.size());
             AZ::SystemTickBus::Handler::BusConnect();
         }
 
-        void Scanner::FilterAsset(AZ::Data::Asset<AZ::Data::AssetData> asset)
+        void Scanner::FilterAsset(SourceHandle asset)
         {
-            if (m_config.filter && m_config.filter(asset))
+            if (m_config.filter && m_config.filter(asset) == ScanConfiguration::Filter::Exclude)
             {
-                VE_LOG("Scanner: Excluded: %s ", GetCurrentAsset().m_relativePath.c_str());
-                m_result.m_filteredAssets.push_back(GetCurrentAsset());
-                ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanFilteredGraph, GetCurrentAsset());
+                VE_LOG("Scanner: Excluded: %s ", ModCurrentAsset().Path().c_str());
+                m_result.m_filteredAssets.push_back(ModCurrentAsset().Describe());
+                ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanFilteredGraph, ModCurrentAsset());
             }
             else
             {
-                VE_LOG("Scanner: Included: %s ", GetCurrentAsset().m_relativePath.c_str());
-                m_result.m_unfiltered.push_back({ asset, GetCurrentAsset() });
-                ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanUnFilteredGraph, GetCurrentAsset());
+                VE_LOG("Scanner: Included: %s ", ModCurrentAsset().Path().c_str());
+                m_result.m_unfiltered.push_back(ModCurrentAsset().Describe());
+                ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanUnFilteredGraph, ModCurrentAsset());
             }
         }
 
-        const AZ::Data::AssetInfo& Scanner::GetCurrentAsset() const
-        {
-            return m_result.m_catalogAssets[m_catalogAssetIndex];
-        }
-
         const ScanResult& Scanner::GetResult() const
         {
             return m_result;
         }
 
-        AZ::Data::Asset<AZ::Data::AssetData> Scanner::LoadAsset()
+        SourceHandle Scanner::LoadAsset()
         {
-            AZ::Data::Asset<AZ::Data::AssetData> asset = AZ::Data::AssetManager::Instance().GetAsset
-                ( GetCurrentAsset().m_assetId
-                , azrtti_typeid<ScriptCanvasAsset>()
-                , AZ::Data::AssetLoadBehavior::PreLoad);
-
-            asset.BlockUntilLoadComplete();
-
-            if (asset.IsReady())
+            auto fileOutcome = LoadFromFile(ModCurrentAsset().Path().c_str());
+            if (fileOutcome.IsSuccess())
             {
-                return asset;
+                return fileOutcome.GetValue();
             }
             else
             {
@@ -79,6 +113,11 @@ namespace ScriptCanvasEditor
             }
         }
 
+        SourceHandle& Scanner::ModCurrentAsset()
+        {
+            return m_result.m_catalogAssets[m_catalogAssetIndex];
+        }
+
         void Scanner::OnSystemTick()
         {
             if (m_catalogAssetIndex == m_result.m_catalogAssets.size())
@@ -93,19 +132,19 @@ namespace ScriptCanvasEditor
             }
             else
             {
-                if (auto asset = LoadAsset())
+                if (auto asset = LoadAsset(); asset.IsGraphValid())
                 {
-                    VE_LOG("Scanner: Loaded: %s ", GetCurrentAsset().m_relativePath.c_str());
+                    VE_LOG("Scanner: Loaded: %s ", ModCurrentAsset().Path().c_str());
                     FilterAsset(asset);
                 }
                 else
                 {
-                    VE_LOG("Scanner: Failed to load: %s ", GetCurrentAsset().m_relativePath.c_str());
-                    m_result.m_loadErrors.push_back(GetCurrentAsset());
-                    ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanLoadFailure, GetCurrentAsset());
+                    VE_LOG("Scanner: Failed to load: %s ", ModCurrentAsset().Path().c_str());
+                    m_result.m_loadErrors.push_back(ModCurrentAsset().Describe());
+                    ModelNotificationsBus::Broadcast(&ModelNotificationsTraits::OnScanLoadFailure, ModCurrentAsset());
                 }
 
-                VE_LOG("Scanner: scan of %s complete", GetCurrentAsset().m_relativePath.c_str());
+                VE_LOG("Scanner: scan of %s complete", ModCurrentAsset().Path().c_str());
                 ++m_catalogAssetIndex;
             }
         }

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/Scanner.h

@@ -33,9 +33,9 @@ namespace ScriptCanvasEditor
             ScanConfiguration m_config;
             ScanResult m_result;
 
-            void FilterAsset(AZ::Data::Asset<AZ::Data::AssetData>);
-            const AZ::Data::AssetInfo& GetCurrentAsset() const;
-            AZ::Data::Asset<AZ::Data::AssetData> LoadAsset();
+            void FilterAsset(SourceHandle);
+            SourceHandle LoadAsset();
+            SourceHandle& ModCurrentAsset();
             void OnSystemTick() override;
         };
     }    

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/UpgradeHelper.cpp

@@ -55,26 +55,25 @@ namespace ScriptCanvasEditor
 
             for (auto& failedUpdate : result->m_failures)
             {
-                auto& assetInfo = failedUpdate.assetInfo;
-                auto assetId = assetInfo.m_assetId;
-
+                auto asset = failedUpdate.asset;
+                
                 m_ui->tableWidget->insertRow(rows);
 
                 connect(m_ui->closeButton, &QPushButton::pressed, this, &QDialog::accept);
-                connect(m_ui->tableWidget, &QTableWidget::itemDoubleClicked, this, [this, rows, assetId](QTableWidgetItem* item)
+                connect(m_ui->tableWidget, &QTableWidget::itemDoubleClicked, this, [this, rows, asset](QTableWidgetItem* item)
                     {
                         if (item && item->data(Qt::UserRole).toInt() == rows)
                         {
-                            OpenGraph(assetId);
+                            OpenGraph(asset);
                         }
                     }
                 );
 
-                auto openGraph = [this, assetId] {
-                    OpenGraph(assetId);
+                auto openGraph = [this, asset] {
+                    OpenGraph(asset);
                 };
 
-                QTableWidgetItem* rowName = new QTableWidgetItem(tr(assetInfo.m_relativePath.c_str()));
+                QTableWidgetItem* rowName = new QTableWidgetItem(tr(asset.Path().c_str()));
                 rowName->setData(Qt::UserRole, rows);
                 m_ui->tableWidget->setItem(rows, 0, rowName);
 
@@ -91,15 +90,15 @@ namespace ScriptCanvasEditor
         }
     }
 
-    void UpgradeHelper::OpenGraph(AZ::Data::AssetId assetId)
+    void UpgradeHelper::OpenGraph(const SourceHandle& asset)
     {
         // Open the graph in SC editor
         AzToolsFramework::OpenViewPane(/*LyViewPane::ScriptCanvas*/"Script Canvas");
         AZ::Outcome<int, AZStd::string> openOutcome = AZ::Failure(AZStd::string());
 
-        if (assetId.IsValid())
+        if (!asset.Path().empty())
         {
-            GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, assetId, -1);
+            GeneralRequestBus::BroadcastResult(openOutcome, &GeneralRequests::OpenScriptCanvasAsset, asset, Tracker::ScriptCanvasFileState::UNMODIFIED, -1);
         }
 
         if (!openOutcome)

Gems/ScriptCanvas/Code/Editor/View/Windows/Tools/UpgradeTool/UpgradeHelper.h

@@ -35,6 +35,8 @@ namespace Ui
 
 namespace ScriptCanvasEditor
 {
+    // class SourceHandle;
+
     //! A tool that collects and upgrades all Script Canvas graphs in the asset catalog
     class UpgradeHelper
         : public AzQtComponents::StyledDialog
@@ -51,6 +53,6 @@ namespace ScriptCanvasEditor
 
         AZStd::unique_ptr<Ui::UpgradeHelper> m_ui;
 
-        void OpenGraph(AZ::Data::AssetId assetId);
+        void OpenGraph(const SourceHandle& assetId);
     };
 }

Gems/ScriptCanvas/Code/Include/ScriptCanvas/Asset/ScriptCanvasAssetBase.h

@@ -8,16 +8,17 @@
 
 #pragma once
 
+#include <AzCore/std/smart_ptr/enable_shared_from_this.h>
 #include <AzCore/Asset/AssetCommon.h>
 #include <Editor/Include/ScriptCanvas/Assets/ScriptCanvasAssetBus.h>
 #include <Editor/Include/ScriptCanvas/Assets/ScriptCanvasBaseAssetData.h>
-
 #include <ScriptCanvas/Asset/AssetDescription.h>
 
 namespace ScriptCanvas
 {
     class ScriptCanvasAssetBase
         : public AZ::Data::AssetData
+        , public AZStd::enable_shared_from_this<ScriptCanvasAssetBase>
         , ScriptCanvas::ScriptCanvasAssetBusRequestBus::Handler
     {
 

Gems/ScriptCanvas/Code/Include/ScriptCanvas/Core/Core.cpp

@@ -6,15 +6,18 @@
  *
  */
 
+
 #include <AzCore/Component/ComponentApplicationBus.h>
 #include <AzCore/Interface/Interface.h>
 #include <AzCore/RTTI/AttributeReader.h>
 #include <AzCore/RTTI/ReflectContext.h>
 #include <AzCore/Serialization/SerializeContext.h>
 #include <AzCore/StringFunc/StringFunc.h>
+#include <Editor/Include/ScriptCanvas/Assets/ScriptCanvasBaseAssetData.h>
 
-#include "Core.h"
 #include "Attributes.h"
+#include "Core.h"
+#include <Core/Graph.h>
 
 namespace ScriptCanvas
 {
@@ -182,5 +185,156 @@ namespace ScriptCanvas
 
         serializeContext->RegisterType(typeId, AZStd::move(classData), EventPlaceholderAnyCreator);
     }
-
+}
+
+namespace ScriptCanvasEditor
+{
+    SourceHandle::SourceHandle()
+        : m_id(AZ::Uuid::CreateNull())
+    {}
+
+    SourceHandle::SourceHandle(const SourceHandle& data, const AZ::Uuid& id, const AZ::IO::Path& path)
+        : m_data(data.m_data)
+        , m_id(id)
+        , m_path(path)
+    {
+        m_path.MakePreferred();
+        m_id = id;
+    }
+
+    SourceHandle::SourceHandle(ScriptCanvas::DataPtr graph, const AZ::Uuid& id, const AZ::IO::Path& path)
+        : m_data(graph)
+        , m_id(id)
+        , m_path(path)
+    {
+        m_path.MakePreferred();
+        m_id = id;
+    }
+
+    SourceHandle::SourceHandle(const SourceHandle& data, const AZ::IO::Path& path)
+        : m_data(data.m_data)
+        , m_id(AZ::Uuid::CreateNull())
+        , m_path(path)
+    {
+        m_path.MakePreferred();
+    }
+
+    SourceHandle::SourceHandle(ScriptCanvas::DataPtr graph, const AZ::IO::Path& path)
+        : m_data(graph)
+        , m_id(AZ::Uuid::CreateNull())
+        , m_path(path)
+    {
+        m_path.MakePreferred();
+    }
+
+    bool SourceHandle::AnyEquals(const SourceHandle& other) const
+    {
+        return m_data && m_data == other.m_data
+            || !m_id.IsNull() && m_id == other.m_id
+            || !m_path.empty() &&  m_path == other.m_path;
+    }
+
+    void SourceHandle::Clear()
+    {
+        m_data = nullptr;
+        m_id = AZ::Uuid::CreateNull();
+        m_path.clear();
+    }
+
+    // return a SourceHandle with only the Id and Path, but without a pointer to the data
+    SourceHandle SourceHandle::Describe() const
+    {
+        return SourceHandle(nullptr, m_id, m_path);
+    }
+
+    GraphPtrConst SourceHandle::Get() const
+    {
+        return m_data ? m_data->GetEditorGraph() : nullptr;
+    }
+
+    const AZ::Uuid& SourceHandle::Id() const
+    {
+        return m_id;
+    }
+
+    bool SourceHandle::IsDescriptionValid() const
+    {
+        return !m_id.IsNull() && !m_path.empty();
+    }
+
+    bool SourceHandle::IsGraphValid() const
+    {
+        return m_data != nullptr;
+    }
+
+    GraphPtr SourceHandle::Mod() const
+    {
+        return m_data ? m_data->ModEditorGraph() : nullptr;
+    }
+
+    bool SourceHandle::operator==(const SourceHandle& other) const
+    {
+        return m_data.get() == other.m_data.get()
+            && m_id == other.m_id
+            && m_path == other.m_path;
+    }
+
+    bool SourceHandle::operator!=(const SourceHandle& other) const
+    {
+        return !(*this == other);
+    }
+
+    const AZ::IO::Path& SourceHandle::Path() const
+    {
+        return m_path;
+    }
+
+    bool SourceHandle::PathEquals(const SourceHandle& other) const
+    {
+        return m_path == other.m_path;
+    }
+
+    void SourceHandle::Reflect(AZ::ReflectContext* context)
+    {
+        if (auto serializeContext = azrtti_cast<AZ::SerializeContext*>(context))
+        {
+            serializeContext->Class<SourceHandle>()
+                ->Version(0)
+                ->Field("id", &SourceHandle::m_id)
+                ->Field("path", &SourceHandle::m_path)
+                ;
+        }
+    }
+
+    AZStd::string SourceHandle::ToString() const
+    {
+        return AZStd::string::format
+            ( "%s, %s, %s"
+            , IsGraphValid() ? "O" : "X"
+            , m_path.empty() ? m_path.c_str() : "<no name>"
+            , m_id.IsNull() ? "<null id>" : m_id.ToString<AZStd::string>().c_str());
+    }
+}
+
+namespace ScriptCanvas
+{
+    const Graph* ScriptCanvasData::GetGraph() const
+    {
+        return AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Graph>(m_scriptCanvasEntity.get());
+    }
+
+    const ScriptCanvasEditor::Graph* ScriptCanvasData::GetEditorGraph() const
+    {
+        return reinterpret_cast<const ScriptCanvasEditor::Graph*>(GetGraph());
+    }
+
+    Graph* ScriptCanvasData::ModGraph()
+    {
+        return AZ::EntityUtils::FindFirstDerivedComponent<ScriptCanvas::Graph>(m_scriptCanvasEntity.get());
+    }
+
+    ScriptCanvasEditor::Graph* ScriptCanvasData::ModEditorGraph()
+    {
+        return reinterpret_cast<ScriptCanvasEditor::Graph*>(ModGraph());
+    }
 }