RowTypePropertyElement.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 / RowTypePropertyElement.cs / 1305376 / RowTypePropertyElement.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 RowTypePropertyElement : ModelFunctionTypeElement
    { 
        private ModelFunctionTypeElement _typeSubElement = null;
        private bool _isRefType = false;
        private CollectionKind _collectionKind = CollectionKind.None;
 
        internal RowTypePropertyElement(SchemaElement parentElement)
            : base(parentElement) 
        { 
            _typeUsageBuilder = new TypeUsageBuilder(this);
        } 

        internal override void ResolveTopLevelNames()
        {
 
            if (_typeSubElement != null)
            { 
                _typeSubElement.ResolveTopLevelNames(); 
            }
 
            if(_unresolvedType != null)
            {
                base.ResolveTopLevelNames();
            } 

        } 
 
        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;

            TypeModifier typeModifier; 
            Function.RemoveTypeModifier(ref type, out typeModifier, out _isRefType);
 
            switch (typeModifier) 
            {
                case TypeModifier.Array: 
                    _collectionKind = CollectionKind.Bag;
                    break;
                default:
                    Debug.Assert(typeModifier == TypeModifier.None, string.Format(CultureInfo.CurrentCulture, "Type is not valid for property {0}: {1}. The modifier for the type cannot be used in this context.", FQName, reader.Value)); 
                    break;
            } 
 
            if (!Utils.ValidateDottedName(Schema, reader, type))
                return; 

            _unresolvedType = type;
        }
 

 
        protected override bool HandleElement(XmlReader reader) 
        {
            if (CanHandleElement(reader, XmlConstants.CollectionType)) 
            {
                HandleCollectionTypeElement(reader);
                return true;
            } 
            else if (CanHandleElement(reader, XmlConstants.ReferenceType))
            { 
                HandleReferenceTypeElement(reader); 
                return true;
            } 
            else if (CanHandleElement(reader, XmlConstants.TypeRef))
            {
                HandleTypeRefElement(reader);
                return true; 
            }
            else if (CanHandleElement(reader, XmlConstants.RowType)) 
            { 
                HandleRowTypeElement(reader);
                return true; 
            }

            return false;
        } 

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

            var subElement = new CollectionTypeElement(this);
            subElement.Parse(reader);
            _typeSubElement = subElement; 
        }
 
        protected void HandleReferenceTypeElement(XmlReader reader) 
        {
            Debug.Assert(reader != null); 

            var subElement = new ReferenceTypeElement(this);
            subElement.Parse(reader);
            _typeSubElement = subElement; 
        }
 
        protected void HandleTypeRefElement(XmlReader reader) 
        {
            Debug.Assert(reader != null); 

            var subElement = new TypeRefElement(this);
            subElement.Parse(reader);
            _typeSubElement = subElement; 
        }
 
        protected void HandleRowTypeElement(XmlReader reader) 
        {
            Debug.Assert(reader != null); 

            var subElement = new RowTypeElement(this);
            subElement.Parse(reader);
            _typeSubElement = subElement; 
        }
 
        internal override void WriteIdentity(StringBuilder builder) 
        {
            builder.Append("Property("); 

            if (UnresolvedType != null && !UnresolvedType.Trim().Equals(String.Empty))
            {
                if (_collectionKind != CollectionKind.None) 
                {
                    builder.Append("Collection(" + UnresolvedType + ")"); 
                } 
                else if (_isRefType)
                { 
                    builder.Append("Ref(" + UnresolvedType + ")");
                }
                else
                { 
                    builder.Append(UnresolvedType);
                } 
            } 
            else
            { 
                _typeSubElement.WriteIdentity(builder);
            }

            builder.Append(")"); 
        }
 
        internal override TypeUsage GetTypeUsage() 
        {
            if (_typeUsage != null) 
            {
                return _typeUsage;
            }
            Debug.Assert(_typeSubElement != null, "For attributes typeusage should have been resolved"); 

            if (_typeSubElement != null) 
            { 
                _typeUsage = _typeSubElement.GetTypeUsage();
            } 
            return _typeUsage;
        }

        internal override bool ResolveNameAndSetTypeUsage(Converter.ConversionCache convertedItemCache, Dictionary newGlobalItems) 
        {
            if (_typeUsage == null) 
            { 
                if (_typeSubElement != null) //Has sub-elements
                { 
                    return _typeSubElement.ResolveNameAndSetTypeUsage(convertedItemCache, newGlobalItems);
                }
                else //Does not have sub-elements; try to resolve
                { 
                    if (_type is ScalarType) //Create and store type usage for scalar type
                    { 
                        _typeUsageBuilder.ValidateAndSetTypeUsage(_type as ScalarType, false); 
                        _typeUsage = _typeUsageBuilder.TypeUsage;
                    } 
                    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) 
                        {
                            if (_isRefType) 
                            { 
                                EntityType entityType = edmType as EntityType;
                                Debug.Assert(entityType != null); 
                                _typeUsage = TypeUsage.Create(new RefType(entityType));
                            }
                            else
                            { 
                                _typeUsageBuilder.ValidateAndSetTypeUsage(edmType, false); //use typeusagebuilder so dont lose facet information
                                _typeUsage = _typeUsageBuilder.TypeUsage; 
                            } 
                        }
                    } 
                    if (_collectionKind != CollectionKind.None)
                    {
                        _typeUsage = TypeUsage.Create(new CollectionType(_typeUsage));
                    } 

                    return _typeUsage != null; 
                } 
            }
            return true; 
        }

        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); 
            }
 
            if (_type == null && _typeSubElement == null)
            {
                //Type not declared as either attribute or subelement
                AddError(ErrorCode.ModelFunctionTypeNotDeclared, EdmSchemaErrorSeverity.Error, Strings.TypeMustBeDeclared); 
            }
 
            if (_type != null && _typeSubElement != null) 
            {
                //Both attribute and sub-element declarations exist 
                AddError(ErrorCode.TypeDeclaredAsAttributeAndElement, EdmSchemaErrorSeverity.Error, Strings.TypeDeclaredAsAttributeAndElement);
            }

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

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

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