mcs/class/referencesource/System.Data.Entity/System/Data/Objects/DataClasses/RelationshipFixer.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="RelationshipFixer.cs" company="Microsoft">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner       Microsoft
   7 // @backupOwner Microsoft
   8 //---------------------------------------------------------------------
   9 using System.Data.Metadata.Edm;
  10
  11 namespace System.Data.Objects.DataClasses
  12 {
  13     [Serializable]
  14     internal class RelationshipFixer<TSourceEntity, TTargetEntity> : IRelationshipFixer
  15         where TSourceEntity : class
  16         where TTargetEntity : class
  17     {
  18         // The following fields are serialized.  Adding or removing a serialized field is considered
  19         // a breaking change.  This includes changing the field type or field name of existing
  20         // serialized fields. If you need to make this kind of change, it may be possible, but it
  21         // will require some custom serialization/deserialization code.
  22         RelationshipMultiplicity _sourceRoleMultiplicity;
  23         RelationshipMultiplicity _targetRoleMultiplicity;
  24
  25         internal RelationshipFixer(RelationshipMultiplicity sourceRoleMultiplicity, RelationshipMultiplicity targetRoleMultiplicity)
  26         {
  27             _sourceRoleMultiplicity = sourceRoleMultiplicity;
  28             _targetRoleMultiplicity = targetRoleMultiplicity;
  29         }
  30
  31         /// <summary>
  32         /// Used during relationship fixup when the source end of the relationship is not
  33         /// yet in the relationships list, and needs to be created
  34         /// </summary>
  35         /// <param name="navigation">RelationshipNavigation to be set on new RelatedEnd</param>
  36         /// <param name="relationshipManager">RelationshipManager to use for creating the new end</param>
  37         /// <returns>Reference to the new collection or reference on the other end of the relationship</returns>
  38         RelatedEnd IRelationshipFixer.CreateSourceEnd(RelationshipNavigation navigation, RelationshipManager relationshipManager)
  39         {
  40             return relationshipManager.CreateRelatedEnd<TTargetEntity, TSourceEntity>(navigation, _targetRoleMultiplicity, _sourceRoleMultiplicity, /*existingRelatedEnd*/ null);
  41         }
  42     }
  43
  44 }