StructuredProperty.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 / StructuredProperty.cs / 1305376 / StructuredProperty.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.Data.Metadata.Edm; 
using System.Diagnostics;
using System.Xml; 
using System.Data; 
using System.Reflection;
using System.IO; 
using System.Globalization;


namespace System.Data.EntityModel.SchemaObjectModel 
{
    ///  
    /// Summary description for StructuredProperty. 
    /// 
    internal class StructuredProperty : Property 
    {
        #region Instance Fields
        private SchemaType _type = null;
        private string _unresolvedType = null; 

        // Facets 
        private TypeUsageBuilder _typeUsageBuilder; 

        //Type of the Collection. By Default Single, and in case of Collections, will be either Bag or List 
        private CollectionKind _collectionKind = CollectionKind.None;

        #endregion
        #region Static Fields 

        //private static System.Text.RegularExpressions.Regex _binaryValueValidator = new System.Text.RegularExpressions.Regex("0[xX][0-9a-fA-F]+"); 
        #endregion 
        #region Public Methods
 
        /// 
        ///
        /// 
        ///  
        internal StructuredProperty(StructuredType parentElement)
            : base(parentElement) 
        { 
            _typeUsageBuilder = new TypeUsageBuilder(this);
        } 

        #endregion
        #region Public Properties
 
        /// 
        /// 
        ///  
        public override SchemaType Type
        { 
            get
            {
                return _type;
            } 
        }
 
        ///  
        /// Returns a TypeUsage that represent this property.
        ///  
        public TypeUsage TypeUsage
        {
            get
            { 
                return _typeUsageBuilder.TypeUsage;
            } 
        } 

        ///  
        /// The nullablity of this property.
        /// 
        public bool Nullable
        { 
            get
            { 
                return _typeUsageBuilder.Nullable; 
            }
        } 

        /// 
        ///
        ///  
        public string Default
        { 
            get 
            {
                return _typeUsageBuilder.Default; 
            }
        }

        ///  
        ///
        ///  
        public object DefaultAsObject 
        {
            get 
            {
                return _typeUsageBuilder.DefaultAsObject;
            }
        } 

 
        ///  
        /// Specifies the type of the Collection.
        /// By Default this is Single( i.e. not a Collection. 
        /// And in case of Collections, will be either Bag or List
        /// 
        public CollectionKind CollectionKind
        { 
            get
            { 
                return _collectionKind; 
            }
        } 

        #endregion
        #region Internal Methods
 
        /// 
        /// 
        ///  
        internal override void ResolveTopLevelNames()
        { 
            base.ResolveTopLevelNames();

            if (_type != null)
            { 
                return;
            } 
 
            _type = ResolveType(UnresolvedType);
 
            _typeUsageBuilder.ValidateDefaultValue(_type);

            ScalarType scalar = _type as ScalarType;
            if (scalar != null) 
            {
                _typeUsageBuilder.ValidateAndSetTypeUsage(scalar, true); 
            } 
        }
 


        /// 
        /// Resolve the type string to a SchemaType object 
        /// 
        ///  
        ///  
        protected virtual SchemaType ResolveType(string typeName)
        { 
            SchemaType element;
            if (!Schema.ResolveTypeName(this, typeName, out element))
            {
                return null; 
            }
 
            if (!(element is SchemaComplexType) && !(element is ScalarType)) 
            {
                AddError(ErrorCode.InvalidPropertyType, EdmSchemaErrorSeverity.Error, 
                    System.Data.Entity.Strings.InvalidPropertyType(UnresolvedType));
                return null;
            }
 
            SchemaType structuredType = element as SchemaType;
 
            return element; 
        }
        #endregion 

        #region Internal Properties
        /// 
        /// 
        /// 
        ///  
        internal string UnresolvedType 
        {
            get 
            {
                return _unresolvedType;
            }
            set 
            {
                _unresolvedType = value; 
            } 
        }
 
        #endregion
        #region Protected Methods

        ///  
        ///
        ///  
        ///  
        internal override void Validate()
        { 
            base.Validate();
            //Non Complex Collections are not supported
            if ((_collectionKind == CollectionKind.Bag) ||
                (_collectionKind == CollectionKind.List)) 
            {
                Debug.Assert(Schema.SchemaVersion != XmlConstants.EdmVersionForV1, 
                    "CollctionKind Attribute is not supported in EDM V1"); 
            }
            //Nullable Complex Types are not supported in V 1.0 and V 2.0 
            if (Nullable && (this.Schema.SchemaVersion == XmlConstants.EdmVersionForV1 ||
                this.Schema.SchemaVersion == XmlConstants.EdmVersionForV2)
                && (this._type is SchemaComplexType))
            { 
                AddError(ErrorCode.NullableComplexType, EdmSchemaErrorSeverity.Error,
                    System.Data.Entity.Strings.NullableComplexType(this.FQName)); 
            } 
        }
 
        #endregion
        #region Protected Properties
        protected override bool HandleAttribute(XmlReader reader)
        { 
            if (base.HandleAttribute(reader))
            { 
                return true; 
            }
            else if (CanHandleAttribute(reader, XmlConstants.TypeElement)) 
            {
                HandleTypeAttribute(reader);
                return true;
            } 
            else if (CanHandleAttribute(reader, XmlConstants.CollectionKind))
            { 
                HandleCollectionKindAttribute(reader); 
                return true;
            } 
            else if (_typeUsageBuilder.HandleAttribute(reader))
            {
                return true;
            } 
            return false;
        } 
        #endregion 
        #region Private Methods
        ///  
        ///
        /// 
        /// 
        private void HandleTypeAttribute(XmlReader reader) 
        {
            if (UnresolvedType != null) 
            { 
                AddError(ErrorCode.AlreadyDefined, EdmSchemaErrorSeverity.Error, reader,
                    System.Data.Entity.Strings.PropertyTypeAlreadyDefined(reader.Name)); 
                return;
            }

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

        /// 
        /// Handles the Multiplicity attribute on the property.
        ///  
        /// 
        private void HandleCollectionKindAttribute(XmlReader reader) 
        { 
            string value = reader.Value;
            if (value == XmlConstants.CollectionKind_None) 
            {
                _collectionKind = CollectionKind.None;
            }
            else 
            {
                if (value == XmlConstants.CollectionKind_List) 
                { 
                    _collectionKind = CollectionKind.List;
                } 
                else if (value == XmlConstants.CollectionKind_Bag)
                {
                    _collectionKind = CollectionKind.Bag;
                } 
                else
                { 
                    Debug.Fail("Xsd should have changed", "XSD validation should have ensured that" + 
                        " Multiplicity attribute has only 'None' or 'Bag' or 'List' as the values");
                    return; 
                }
            }
        }
 
        #endregion
    } 
} 

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

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