ComplexType.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 / Metadata / Edm / ComplexType.cs / 1305376 / ComplexType.cs

                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System.Data.Common;
using System.Threading; 
using System.Diagnostics;

namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Represent the Edm Complex Type 
    ///  
    public class ComplexType : StructuralType
    { 
        #region Constructors
        /// 
        /// Initializes a new instance of Complex Type with the given properties
        ///  
        /// The name of the complex type
        /// The namespace name of the type 
        /// The version of this type 
        /// dataSpace in which this ComplexType belongs to
        /// If either name, namespace or version arguments are null 
        internal ComplexType(string name, string namespaceName, DataSpace dataSpace)
            : base(name, namespaceName, dataSpace)
        {
        } 

        ///  
        /// Initializes a new instance of Complex Type - required for bootstraping code 
        /// 
        internal ComplexType() 
        {
            // No initialization of item attributes in here, it's used as a pass thru in the case for delay population
            // of item attributes
        } 

 
        #endregion 

        #region Fields 
        private ReadOnlyMetadataCollection _properties;
        #endregion

        #region Properties 
        /// 
        /// Returns the kind of the type 
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.ComplexType; } }
 


        /// 
        /// Returns just the properties from the collection 
        /// of members on this type
        ///  
        public ReadOnlyMetadataCollection Properties 
        {
            get 
            {
                Debug.Assert(IsReadOnly, "this is a wrapper around this.Members, don't call it during metadata loading, only call it after the metadata is set to readonly");
                if (null == _properties)
                { 
                    Interlocked.CompareExchange(ref _properties,
                        new FilteredReadOnlyMetadataCollection( 
                            this.Members, Helper.IsEdmProperty), null); 
                }
                return _properties; 
            }
        }
        #endregion
 
        #region Methods
 
        ///  
        /// Validates a EdmMember object to determine if it can be added to this type's
        /// Members collection. If this method returns without throwing, it is assumed 
        /// the member is valid.
        /// 
        /// The member to validate
        /// Thrown if the member is not a EdmProperty 
        internal override void ValidateMemberForAdd(EdmMember member)
        { 
            Debug.Assert(Helper.IsEdmProperty(member) || Helper.IsNavigationProperty(member), 
                "Only members of type Property may be added to ComplexType.");
        } 
        #endregion
    }

    internal sealed class ClrComplexType : ComplexType 
    {
        /// cached CLR type handle, allowing the Type reference to be GC'd 
        private readonly System.RuntimeTypeHandle _type; 

        /// cached dynamic method to construct a CLR instance 
        private Delegate _constructor;

        private readonly string _cspaceTypeName;
 
        /// 
        /// Initializes a new instance of Complex Type with properties from the type. 
        ///  
        /// The CLR type to construct from
        internal ClrComplexType(Type clrType, string cspaceNamespaceName, string cspaceTypeName) 
            : base(EntityUtil.GenericCheckArgumentNull(clrType, "clrType").Name, clrType.Namespace ?? string.Empty,
                   DataSpace.OSpace)
        {
            System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(cspaceNamespaceName) && 
                !String.IsNullOrEmpty(cspaceTypeName), "Mapping information must never be null");
 
            _type = clrType.TypeHandle; 
            _cspaceTypeName = cspaceNamespaceName + "." + cspaceTypeName;
            this.Abstract = clrType.IsAbstract; 
        }
        internal static ClrComplexType CreateReadonlyClrComplexType(Type clrType, string cspaceNamespaceName, string cspaceTypeName)
        {
            ClrComplexType type = new ClrComplexType(clrType, cspaceNamespaceName, cspaceTypeName); 
            type.SetReadOnly();
 
            return type; 
        }
 
        /// cached dynamic method to construct a CLR instance
        internal Delegate Constructor
        {
            get { return _constructor; } 
            set
            { 
                // It doesn't matter which delegate wins, but only one should be jitted 
                Interlocked.CompareExchange(ref _constructor, value, null);
            } 
        }

        /// 
        ///  
        internal override System.Type ClrType
        { 
            get { return Type.GetTypeFromHandle(_type); } 
        }
 
        internal string CSpaceTypeName { get { return _cspaceTypeName; } }
    }
}

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

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