Integrating up through commit 90f050496

Code/Framework/AzToolsFramework/AzToolsFramework/Undo/UndoCacheInterface.h

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+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+
+#pragma once
+
+#include <AzCore/Component/Entity.h>
+#include <AzCore/Interface/Interface.h>
+
+namespace AzToolsFramework
+{
+    namespace UndoSystem
+    {
+        class UndoCacheInterface
+        {
+        public:
+            AZ_RTTI(UndoCacheInterface, "{CC1E4411-A045-4906-AD39-2E0445B5EADA}");
+
+            //! Store the new entity state or replace the old state.
+            virtual void UpdateCache(const AZ::EntityId& entityId) = 0;
+
+            //! Remove the cache line for the entity, if there is one.
+            virtual void PurgeCache(const AZ::EntityId& entityId) = 0;
+
+            //! Clear the entire cache.
+            virtual void Clear() = 0;
+
+            //! Verify if any changes to the entity was not correctly notified.
+            virtual void Validate(const AZ::EntityId& entityId) = 0;
+        };
+
+    } // namespace UndoSystem
+} // namespace AzToolsFramework
+