EntityContainerRelationshipSetEnd.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / EntityContainerRelationshipSetEnd.cs / 1305376 / EntityContainerRelationshipSetEnd.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; 

namespace System.Data.EntityModel.SchemaObjectModel 
{
    /// 
    /// Represents an RelationshipSetEnd element.
    ///  
    internal class EntityContainerRelationshipSetEnd : SchemaElement
    { 
        private IRelationshipEnd _relationshipEnd; 
        private string _unresolvedEntitySetName;
        private EntityContainerEntitySet _entitySet; 

        /// 
        /// Constructs an EntityContainerRelationshipSetEnd
        ///  
        /// Reference to the schema element.
        public EntityContainerRelationshipSetEnd( EntityContainerRelationshipSet parentElement ) 
            : base( parentElement ) 
        {
        } 


        /// 
        /// the End in the parent�s Association that this element refers to 
        /// 
        public IRelationshipEnd RelationshipEnd 
        { 
            get { return _relationshipEnd; }
            internal set { _relationshipEnd = value; } 
        }

        public EntityContainerEntitySet EntitySet
        { 
            get { return _entitySet; }
            internal set { _entitySet = value; } 
        } 

        protected override bool ProhibitAttribute(string namespaceUri, string localName) 
        {
            if (base.ProhibitAttribute(namespaceUri, localName))
            {
                return true; 
            }
 
            if (namespaceUri == null && localName == XmlConstants.Name) 
            {
                return false; 
            }
            return false;
        }
 
        protected override bool HandleAttribute(XmlReader reader)
        { 
            if (base.HandleAttribute(reader)) 
            {
                return true; 
            }
            else if (CanHandleAttribute(reader, XmlConstants.EntitySet))
            {
                HandleEntitySetAttribute(reader); 
                return true;
            } 
 
            return false;
        } 

        /// 
        /// This is the method that is called when an EntitySet Attribute is encountered.
        ///  
        /// The XmlRead positned at the extent attribute.
        private void HandleEntitySetAttribute( XmlReader reader ) 
        { 
            if (Schema.DataModel == SchemaDataModelOption.ProviderDataModel)
            { 
                // ssdl will take anything, because this is the table name, and we
                // can't predict what the vendor will need in a table name
                _unresolvedEntitySetName = reader.Value;
            } 
            else
            { 
                _unresolvedEntitySetName = HandleUndottedNameAttribute(reader, _unresolvedEntitySetName); 
            }
        } 

        /// 
        /// Used during the resolve phase to resolve the type name to the object that represents that type
        ///  
        internal override void ResolveTopLevelNames()
        { 
            base.ResolveTopLevelNames(); 

            if ( _entitySet == null ) 
            {
                _entitySet = this.ParentElement.ParentElement.FindEntitySet( _unresolvedEntitySetName );
                if ( _entitySet == null )
                { 
                    AddError( ErrorCode.InvalidEndEntitySet, EdmSchemaErrorSeverity.Error,
                        System.Data.Entity.Strings.InvalidEntitySetNameReference(_unresolvedEntitySetName, Name ) ); 
                } 
            }
        } 

        /// 
        /// Do all validation for this element here, and delegate to all sub elements
        ///  
        internal override void Validate()
        { 
            base.Validate(); 

            if ( _relationshipEnd == null || _entitySet == null ) 
            {
                return;
            }
 
            // We need to allow 2 kind of scenarios:
            // 1> If you have a relationship type defined between Customer and Order, then you can have a association set in 
            //    which the Customer end refers to a Entity Set of type GoodCustomer where GoodCustomer type derives from Customer 
            // 2> If you have a relationship type defined between GoodCustomer and Order, then you can have a relationship
            //    set which GoodCustomer end refers to an entity set whose entity type is Customer (where GoodCustomer derives 
            //    from Customer). This scenario enables us to support scenarios where you want specific types in an entity set
            //    to take part in a relationship.
            if ( !_relationshipEnd.Type.IsOfType( _entitySet.EntityType ) &&
                 !_entitySet.EntityType.IsOfType( _relationshipEnd.Type )) 
            {
                AddError( ErrorCode.InvalidEndEntitySet, EdmSchemaErrorSeverity.Error, 
                    System.Data.Entity.Strings.InvalidEndEntitySetTypeMismatch(_relationshipEnd.Name ) ); 
            }
        } 

        /// 
        /// The parent element as an EntityContainerProperty
        ///  
        internal new EntityContainerRelationshipSet ParentElement
        { 
            get 
            {
                return (EntityContainerRelationshipSet)( base.ParentElement ); 
            }
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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EntityContainerRelationshipSetEnd.cs source code in C# .NET

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