67 lines
2.9 KiB
C#
67 lines
2.9 KiB
C#
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//---------------------------------------------------------------------
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// <copyright file="ExtractedStateEntry.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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// @owner [....]
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//---------------------------------------------------------------------
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using System.Collections.Generic;
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using System.Data.Common.CommandTrees;
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using System.Data.Metadata.Edm;
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using System.Diagnostics;
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using System.Linq;
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namespace System.Data.Mapping.Update.Internal
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{
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/// <summary>
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/// Represents the data contained in a StateEntry using internal data structures
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/// of the UpdatePipeline.
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/// </summary>
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internal struct ExtractedStateEntry
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{
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internal readonly EntityState State;
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internal readonly PropagatorResult Original;
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internal readonly PropagatorResult Current;
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internal readonly IEntityStateEntry Source;
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internal ExtractedStateEntry(UpdateTranslator translator, IEntityStateEntry stateEntry)
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{
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Debug.Assert(null != stateEntry, "stateEntry must not be null");
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this.State = stateEntry.State;
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this.Source = stateEntry;
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switch (stateEntry.State)
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{
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case EntityState.Deleted:
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this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.AllModified);
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this.Current = null;
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break;
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case EntityState.Unchanged:
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this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.NoneModified);
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this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.NoneModified);
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break;
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case EntityState.Modified:
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this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.SomeModified);
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this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.SomeModified);
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break;
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case EntityState.Added:
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this.Original = null;
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this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult(
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stateEntry, ModifiedPropertiesBehavior.AllModified);
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break;
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default:
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Debug.Fail("unexpected IEntityStateEntry.State for entity " + stateEntry.State);
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this.Original = null;
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this.Current = null;
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break;
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}
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}
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}
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}
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