Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / EntityContainerRelationshipSet.cs / 1305376 / EntityContainerRelationshipSet.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Diagnostics; using System.Xml; using System.Data; using System.Data.Metadata.Edm; using System.Data.Entity; namespace System.Data.EntityModel.SchemaObjectModel { ////// Represents an RelationshipSet element. /// internal abstract class EntityContainerRelationshipSet : SchemaElement { private IRelationship _relationship; string _unresolvedRelationshipTypeName; ////// Constructs an EntityContainerRelationshipSet /// /// Reference to the schema element. public EntityContainerRelationshipSet( EntityContainer parentElement ) : base( parentElement ) { } internal IRelationship Relationship { get { return _relationship; } set { Debug.Assert(value != null, "relationship can never be set to null"); _relationship = value; } } protected abstract bool HasEnd( string role ); protected abstract void AddEnd( IRelationshipEnd relationshipEnd, EntityContainerEntitySet entitySet ); internal abstract IEnumerableEnds { get; } /// /// The method that is called when an Association attribute is encountered. /// /// An XmlReader positioned at the Association attribute. protected void HandleRelationshipTypeNameAttribute( XmlReader reader ) { Debug.Assert( reader != null ); ReturnValuevalue = HandleDottedNameAttribute( reader, _unresolvedRelationshipTypeName, Strings.PropertyTypeAlreadyDefined ); if ( value.Succeeded ) { _unresolvedRelationshipTypeName = value.Value; } } /// /// Used during the resolve phase to resolve the type name to the object that represents that type /// internal override void ResolveTopLevelNames() { base.ResolveTopLevelNames(); if ( _relationship == null ) { SchemaType element; if ( !Schema.ResolveTypeName( this, _unresolvedRelationshipTypeName, out element ) ) { return; } _relationship = element as IRelationship; if ( _relationship == null ) { AddError( ErrorCode.InvalidPropertyType, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidRelationshipSetType(element.Name ) ); return; } } foreach ( EntityContainerRelationshipSetEnd end in Ends ) { end.ResolveTopLevelNames(); } } internal override void ResolveSecondLevelNames() { base.ResolveSecondLevelNames(); foreach (EntityContainerRelationshipSetEnd end in Ends) { end.ResolveSecondLevelNames(); } } ////// Do all validation for this element here, and delegate to all sub elements /// internal override void Validate() { base.Validate(); InferEnds(); // check out the ends foreach ( EntityContainerRelationshipSetEnd end in Ends ) { end.Validate(); } // Enabling Association between subtypes in case of Referential Constraints, since // CSD is blocked on this. We need to make a long term call about whether we should // really allow this. Bug #520216 //foreach (ReferentialConstraint constraint in Relationship.Constraints) //{ // IRelationshipEnd dependentEnd = constraint.DependentRole.End; // EntityContainerRelationshipSetEnd setEnd = GetEnd(dependentEnd.Name); // Debug.Assert(setEnd != null); // //Make sure that the EntityType of the dependant role in a referential constraint // //covers the whole EntitySet( i.e. not a subtype of the EntitySet's type). // if (!setEnd.EntitySet.EntityType.IsOfType(constraint.DependentRole.End.Type)) // { // AddError(ErrorCode.InvalidDependentRoleType, EdmSchemaErrorSeverity.Error, // System.Data.Entity.Strings.InvalidDependentRoleType(dependentEnd.Type.FQName, dependentEnd.Name, // dependentEnd.Parent.FQName, setEnd.EntitySet.Name, setEnd.ParentElement.Name)); // } //} // Validate Number of ends is correct // What we know: // No ends are missing, becuase we infered all missing ends // No extra ends are there because the names have been matched, and an extra name will have caused an error // // looks like no count validation needs to be done } ////// Adds any ends that need to be infered /// private void InferEnds() { Debug.Assert( Relationship != null ); foreach ( IRelationshipEnd relationshipEnd in Relationship.Ends ) { if ( ! HasEnd( relationshipEnd.Name ) ) { EntityContainerEntitySet entitySet = InferEntitySet(relationshipEnd); if (entitySet != null) { // we don't have this end, we need to add it AddEnd(relationshipEnd, entitySet); } } } } ////// For the given relationship end, find the EntityContainer Property that will work for the extent /// /// The relationship end of the RelationshipSet that needs and extent ///Null is none could be found, or the EntityContainerProperty that is the valid extent private EntityContainerEntitySet InferEntitySet( IRelationshipEnd relationshipEnd ) { Debug.Assert(relationshipEnd != null, "relationshipEnd parameter is null"); ListpossibleExtents = new List (); foreach ( EntityContainerEntitySet set in ParentElement.EntitySets ) { if ( relationshipEnd.Type.IsOfType( set.EntityType ) ) { possibleExtents.Add( set ); } } if ( possibleExtents.Count == 1 ) { return possibleExtents[0]; } else if ( possibleExtents.Count == 0 ) { // no matchs AddError( ErrorCode.MissingExtentEntityContainerEnd, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.MissingEntityContainerEnd(relationshipEnd.Name, FQName ) ); } else { // abmigous AddError( ErrorCode.AmbiguousEntityContainerEnd, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.AmbiguousEntityContainerEnd(relationshipEnd.Name, FQName ) ); } return null; } /// /// The parent element as an EntityContainer /// internal new EntityContainer ParentElement { get { return (EntityContainer)( base.ParentElement ); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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