53 lines
2.5 KiB
C#
53 lines
2.5 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="IChangeTrackingStrategy.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Data.Objects.DataClasses;
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namespace System.Data.Objects.Internal
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{
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/// <summary>
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/// A strategy interface that defines methods used for different types of change tracking.
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/// Implementors of this interface are used by the EntityWrapper class.
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/// </summary>
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internal interface IChangeTrackingStrategy
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{
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/// <summary>
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/// Sets a change tracker onto an entity, or does nothing if the entity does not support change trackers.
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/// </summary>
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/// <param name="changeTracker">The change tracker to set</param>
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void SetChangeTracker(IEntityChangeTracker changeTracker);
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/// <summary>
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/// Takes a snapshot of the entity contained in the given state entry, or does nothing if
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/// snapshots are not required for the entity.
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/// </summary>
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/// <param name="entry">The state entry representing the entity to snapshot</param>
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void TakeSnapshot(EntityEntry entry);
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/// <summary>
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/// Sets the given value onto the entity with the registered change either handled by the
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/// entity itself or by using the given EntityEntry as the change tracker.
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/// </summary>
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/// <param name="entry">The state entry of the entity to for which a value should be set</param>
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/// <param name="member">State member information indicating the member to set</param>
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/// <param name="ordinal">The ordinal of the member to set</param>
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/// <param name="target">The object onto which the value should be set; may be the entity, or a contained complex value</param>
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/// <param name="value">The value to set</param>
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void SetCurrentValue(EntityEntry entry, StateManagerMemberMetadata member, int ordinal, object target, object value);
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/// <summary>
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/// Updates the current value records using Shaper.UpdateRecord but with additional change tracking logic
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/// added as required by POCO and proxy entities.
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/// </summary>
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/// <param name="value">The value</param>
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/// <param name="entry">The existing ObjectStateEntry</param>
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void UpdateCurrentValueRecord(object value, EntityEntry entry);
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}
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}
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