ExtractedStateEntry.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Map / Update / Internal / ExtractedStateEntry.cs / 1305376 / ExtractedStateEntry.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
//--------------------------------------------------------------------- 
 

using System.Collections.Generic; 
using System.Data.Common.CommandTrees;
using System.Data.Metadata.Edm;
using System.Diagnostics;
using System.Linq; 
namespace System.Data.Mapping.Update.Internal
{ 
    ///  
    /// Represents the data contained in a StateEntry using internal data structures
    /// of the UpdatePipeline. 
    /// 
    internal struct ExtractedStateEntry
    {
        internal readonly EntityState State; 
        internal readonly PropagatorResult Original;
        internal readonly PropagatorResult Current; 
        internal readonly IEntityStateEntry Source; 

        internal ExtractedStateEntry(UpdateTranslator translator, IEntityStateEntry stateEntry) 
        {
            Debug.Assert(null != stateEntry, "stateEntry must not be null");
            this.State = stateEntry.State;
            this.Source = stateEntry; 

            switch (stateEntry.State) 
            { 
                case EntityState.Deleted:
                    this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult( 
                        stateEntry, ModifiedPropertiesBehavior.AllModified);
                    this.Current = null;
                    break;
                case EntityState.Unchanged: 
                    this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult(
                        stateEntry, ModifiedPropertiesBehavior.NoneModified); 
                    this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult( 
                        stateEntry, ModifiedPropertiesBehavior.NoneModified);
                    break; 
                case EntityState.Modified:
                    this.Original = translator.RecordConverter.ConvertOriginalValuesToPropagatorResult(
                        stateEntry, ModifiedPropertiesBehavior.SomeModified);
                    this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult( 
                        stateEntry, ModifiedPropertiesBehavior.SomeModified);
                    break; 
                case EntityState.Added: 
                    this.Original = null;
                    this.Current = translator.RecordConverter.ConvertCurrentValuesToPropagatorResult( 
                        stateEntry, ModifiedPropertiesBehavior.AllModified);
                    break;
                default:
                    Debug.Fail("unexpected IEntityStateEntry.State for entity " + stateEntry.State); 
                    this.Original = null;
                    this.Current = null; 
                    break; 
            }
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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