Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Objects/Internal/EntityWithKeyStrategy.cs

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+//---------------------------------------------------------------------
+// <copyright file="EntityWithKeyStrategy.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//---------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Data;
+using System.Data.Objects.DataClasses;
+using System.Diagnostics;
+
+namespace System.Data.Objects.Internal
+{
+    /// <summary>
+    /// Implementor of IEntityKeyStrategy for entities that implement IEntityWithKey.  Getting and setting
+    /// the key is deferred to the entity itself.
+    /// </summary>
+    internal sealed class EntityWithKeyStrategy : IEntityKeyStrategy
+    {
+        private IEntityWithKey _entity;
+
+        /// <summary>
+        /// Creates a strategy object for the given entity.  Keys will be stored in the entity.
+        /// </summary>
+        /// <param name="entity">The entity to use</param>
+        public EntityWithKeyStrategy(IEntityWithKey entity)
+        {
+            _entity = entity;
+        }
+
+        // See IEntityKeyStrategy
+        public EntityKey GetEntityKey()
+        {
+            return _entity.EntityKey;
+        }
+
+        // See IEntityKeyStrategy
+        public void SetEntityKey(EntityKey key)
+        {
+            _entity.EntityKey = key;
+        }
+
+        // See IEntityKeyStrategy
+        public EntityKey GetEntityKeyFromEntity()
+        {
+            return _entity.EntityKey;
+        }
+    }
+}