ReferenceTypeElement.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 / EntityModel / SchemaObjectModel / ReferenceTypeElement.cs / 1305376 / ReferenceTypeElement.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using Som = System.Data.EntityModel.SchemaObjectModel;
using System; 
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics; 
using System.Globalization;
using System.Xml; 
using System.Xml.Schema; 
using System.Data;
using System.IO; 
using System.Data.Metadata.Edm;
using System.Data.Entity;
using System.Text;
 
namespace System.Data.EntityModel.SchemaObjectModel
{ 
    class ReferenceTypeElement : ModelFunctionTypeElement 
    {
        #region constructor 
        /// 
        ///
        /// 
        ///  
        internal ReferenceTypeElement(SchemaElement parentElement)
            : base(parentElement) 
        { 

        } 
        #endregion

        protected override bool HandleAttribute(XmlReader reader)
        { 
            if (base.HandleAttribute(reader))
            { 
                return true; 
            }
            else if (CanHandleAttribute(reader, XmlConstants.TypeElement)) 
            {
                HandleTypeElementAttribute(reader);
                return true;
            } 

            return false; 
        } 

        protected void HandleTypeElementAttribute(XmlReader reader) 
        {
            Debug.Assert(reader != null);

            string type; 
            if (!Utils.GetString(Schema, reader, out type))
                return; 
 
            _unresolvedType = type;
        } 

        internal override void WriteIdentity(StringBuilder builder)
        {
            Debug.Assert(UnresolvedType != null && !UnresolvedType.Trim().Equals(String.Empty)); 
            builder.Append("Ref(" + UnresolvedType + ")");
        } 
 
        internal override TypeUsage GetTypeUsage()
        { 
            return _typeUsage;
        }

        internal override bool ResolveNameAndSetTypeUsage(Converter.ConversionCache convertedItemCache, Dictionary newGlobalItems) 
        {
            if (_typeUsage == null) 
            { 
                Debug.Assert(!(_type is ScalarType));
 
                EdmType edmType = (EdmType)Converter.LoadSchemaElement(_type, _type.Schema.ProviderManifest, convertedItemCache, newGlobalItems);
                EntityType entityType = edmType as EntityType;

                Debug.Assert(entityType != null); 

                RefType refType = new RefType(entityType); 
                refType.AddMetadataProperties(this.OtherContent); 
                _typeUsage = TypeUsage.Create(refType);
            } 
            return true;
        }

        internal override void Validate() 
        {
            base.Validate(); 
 
            if (_type != null && !(_type is SchemaEntityType))
            { 
                //Ref type refers to non entity type
                AddError(ErrorCode.ReferenceToNonEntityType, EdmSchemaErrorSeverity.Error, Strings.ReferenceToNonEntityType(_type.FQName));
            }
        } 
    }
} 

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

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