mcs/class/referencesource/System.Data.Entity/System/Data/Objects/ObjectStateEntryDbUpdatableDataRecord.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="ObjectStateEntryDbUpdatableDataRecord.cs" company="Microsoft">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner       Microsoft
   7 // @backupOwner Microsoft
   8 //---------------------------------------------------------------------
   9 using System;
  10 using System.ComponentModel;
  11 using System.Data;
  12 using System.Data.Common;
  13 using System.Data.Metadata.Edm;
  14 using System.Data.Objects;
  15 using System.Diagnostics;
  16 using System.Reflection;
  17
  18 namespace System.Data.Objects
  19 {
  20     internal sealed class ObjectStateEntryDbUpdatableDataRecord : CurrentValueRecord
  21     {
  22         internal ObjectStateEntryDbUpdatableDataRecord(EntityEntry cacheEntry, StateManagerTypeMetadata metadata, object userObject)
  23             : base(cacheEntry, metadata, userObject)
  24         {
  25             EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry");
  26             EntityUtil.CheckArgumentNull(userObject, "userObject");
  27             EntityUtil.CheckArgumentNull(metadata, "metadata");
  28             Debug.Assert(!cacheEntry.IsKeyEntry, "Cannot create an ObjectStateEntryDbUpdatableDataRecord for a key entry");
  29             switch (cacheEntry.State)
  30             {
  31                 case EntityState.Unchanged:
  32                 case EntityState.Modified:
  33                 case EntityState.Added:
  34                     break;
  35                 default:
  36                     Debug.Assert(false, "A CurrentValueRecord cannot be created for an entity object that is in a deleted or detached state.");
  37                     break;
  38             }
  39         }
  40         internal ObjectStateEntryDbUpdatableDataRecord(RelationshipEntry cacheEntry)
  41             : base(cacheEntry)
  42         {
  43             EntityUtil.CheckArgumentNull(cacheEntry, "cacheEntry");
  44             switch (cacheEntry.State)
  45             {
  46                 case EntityState.Unchanged:
  47                 case EntityState.Modified:
  48                 case EntityState.Added:
  49                     break;
  50                 default:
  51                     Debug.Assert(false, "A CurrentValueRecord cannot be created for an entity object that is in a deleted or detached state.");
  52                     break;
  53             }
  54         }
  55         protected override object GetRecordValue(int ordinal)
  56         {
  57             if (_cacheEntry.IsRelationship)
  58             {
  59                 return (_cacheEntry as RelationshipEntry).GetCurrentRelationValue(ordinal);
  60             }
  61             else
  62             {
  63                 return (_cacheEntry as EntityEntry).GetCurrentEntityValue(_metadata, ordinal, _userObject, ObjectStateValueRecord.CurrentUpdatable);
  64             }
  65         }
  66         protected override void SetRecordValue(int ordinal, object value)
  67         {
  68             if (_cacheEntry.IsRelationship)
  69             {
  70                 // Cannot modify relation values from the public API
  71                 throw EntityUtil.CantModifyRelationValues();
  72             }
  73             else
  74             {
  75                 (_cacheEntry as EntityEntry).SetCurrentEntityValue(_metadata, ordinal, _userObject, value);
  76             }
  77         }
  78     }
  79 }