TypeRefElement.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 / TypeRefElement.cs / 1305376 / TypeRefElement.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 TypeRefElement : ModelFunctionTypeElement
    { 

        #region constructor
        /// 
        /// 
        /// 
        ///  
        internal TypeRefElement(SchemaElement parentElement) 
            : base(parentElement)
        { 

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

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

            string type; 
            if (!Utils.GetString(Schema, reader, out type)) 
                return;
 
            if (!Utils.ValidateDottedName(Schema, reader, type))
                return;

            _unresolvedType = type; 
        }
 
        internal override bool ResolveNameAndSetTypeUsage(Converter.ConversionCache convertedItemCache, Dictionary newGlobalItems) 
        {
            if (_type is ScalarType) //Create and store type usage for scalar type 
            {
                _typeUsageBuilder.ValidateAndSetTypeUsage(_type as ScalarType, false);
                _typeUsage = _typeUsageBuilder.TypeUsage;
                return true; 
            }
            else  //Try to resolve edm type. If not now, it will resolve in the second pass 
            { 
                EdmType edmType = (EdmType)Converter.LoadSchemaElement(_type, _type.Schema.ProviderManifest, convertedItemCache, newGlobalItems);
                if (edmType != null) 
                {
                    _typeUsageBuilder.ValidateAndSetTypeUsage(edmType, false); //use typeusagebuilder so dont lose facet information
                    _typeUsage = _typeUsageBuilder.TypeUsage;
                } 

                return _typeUsage != null; 
            } 
        }
 

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

            if (_type != null && _type is ScalarType == false && _typeUsageBuilder.HasUserDefinedFacets) 
            {
                //Non-scalar return type should not have Facets
                AddError(ErrorCode.ModelFuncionFacetOnNonScalarType, EdmSchemaErrorSeverity.Error, Strings.FacetsOnNonScalarType(_type.FQName));
            } 

            if (_type == null && _typeUsageBuilder.HasUserDefinedFacets) 
            { 
                //Type attribute not specified but facets exist
                AddError(ErrorCode.ModelFunctionIncorrectlyPlacedFacet, EdmSchemaErrorSeverity.Error, Strings.FacetDeclarationRequiresTypeAttribute); 
            }

        }
    } 
}

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

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