CollectionType.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / CollectionType.cs / 2 / CollectionType.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
using System; 
using System.Collections.Generic;
using System.Data.Common; 
using System.Text;

namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Represents the Edm Collection Type 
    ///  
    public sealed class CollectionType : EdmType
    { 
        #region Constructors
        /// 
        /// The constructor for constructing a CollectionType object with the element type it contains
        ///  
        /// The element type that this collection type contains
        /// Thrown if the argument elementType is null 
        internal CollectionType(EdmType elementType) 
            : this(TypeUsage.Create(elementType))
        { 
            this.DataSpace = elementType.DataSpace;
        }

        ///  
        /// The constructor for constructing a CollectionType object with the element type (as a TypeUsage) it contains
        ///  
        /// The element type that this collection type contains 
        /// Thrown if the argument elementType is null
        internal CollectionType(TypeUsage elementType) 
            : base(GetIdentity(EntityUtil.GenericCheckArgumentNull(elementType, "elementType")),
                    EdmConstants.TransientNamespace, elementType.EdmType.DataSpace)
        {
            _typeUsage = elementType; 
            SetReadOnly();
        } 
        #endregion 

        #region Fields 
        private readonly TypeUsage _typeUsage;
        #endregion

        #region Properties 
        /// 
        /// Returns the kind of the type 
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.CollectionType; } }
 
        /// 
        /// The type of the element that this collection type contains
        /// 
        [MetadataProperty(BuiltInTypeKind.TypeUsage, false)] 
        public TypeUsage TypeUsage
        { 
            get 
            {
                return _typeUsage; 
            }
        }
        #endregion
 
        #region Methods
        ///  
        /// Constructs the name of the collection type 
        /// 
        /// The typeusage for the element type that this collection type refers to 
        /// The identity of the resulting collection type
        private static string GetIdentity(TypeUsage typeUsage)
        {
            StringBuilder builder = new StringBuilder(50); 
            builder.Append("collection[");
            typeUsage.BuildIdentity(builder); 
            builder.Append("]"); 
            return builder.ToString();
        } 

        /// 
        /// Override EdmEquals to support value comparison of TypeUsage property
        ///  
        /// 
        ///  
        internal override bool EdmEquals(MetadataItem item) 
        {
            // short-circuit if this and other are reference equivalent 
            if (Object.ReferenceEquals(this, item)) { return true; }

            // check type of item
            if (null == item || BuiltInTypeKind.CollectionType != item.BuiltInTypeKind) { return false; } 
            CollectionType other = (CollectionType)item;
 
            // compare type usage 
            return this.TypeUsage.EdmEquals(other.TypeUsage);
        } 
        #endregion
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
using System; 
using System.Collections.Generic;
using System.Data.Common; 
using System.Text;

namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Represents the Edm Collection Type 
    ///  
    public sealed class CollectionType : EdmType
    { 
        #region Constructors
        /// 
        /// The constructor for constructing a CollectionType object with the element type it contains
        ///  
        /// The element type that this collection type contains
        /// Thrown if the argument elementType is null 
        internal CollectionType(EdmType elementType) 
            : this(TypeUsage.Create(elementType))
        { 
            this.DataSpace = elementType.DataSpace;
        }

        ///  
        /// The constructor for constructing a CollectionType object with the element type (as a TypeUsage) it contains
        ///  
        /// The element type that this collection type contains 
        /// Thrown if the argument elementType is null
        internal CollectionType(TypeUsage elementType) 
            : base(GetIdentity(EntityUtil.GenericCheckArgumentNull(elementType, "elementType")),
                    EdmConstants.TransientNamespace, elementType.EdmType.DataSpace)
        {
            _typeUsage = elementType; 
            SetReadOnly();
        } 
        #endregion 

        #region Fields 
        private readonly TypeUsage _typeUsage;
        #endregion

        #region Properties 
        /// 
        /// Returns the kind of the type 
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.CollectionType; } }
 
        /// 
        /// The type of the element that this collection type contains
        /// 
        [MetadataProperty(BuiltInTypeKind.TypeUsage, false)] 
        public TypeUsage TypeUsage
        { 
            get 
            {
                return _typeUsage; 
            }
        }
        #endregion
 
        #region Methods
        ///  
        /// Constructs the name of the collection type 
        /// 
        /// The typeusage for the element type that this collection type refers to 
        /// The identity of the resulting collection type
        private static string GetIdentity(TypeUsage typeUsage)
        {
            StringBuilder builder = new StringBuilder(50); 
            builder.Append("collection[");
            typeUsage.BuildIdentity(builder); 
            builder.Append("]"); 
            return builder.ToString();
        } 

        /// 
        /// Override EdmEquals to support value comparison of TypeUsage property
        ///  
        /// 
        ///  
        internal override bool EdmEquals(MetadataItem item) 
        {
            // short-circuit if this and other are reference equivalent 
            if (Object.ReferenceEquals(this, item)) { return true; }

            // check type of item
            if (null == item || BuiltInTypeKind.CollectionType != item.BuiltInTypeKind) { return false; } 
            CollectionType other = (CollectionType)item;
 
            // compare type usage 
            return this.TypeUsage.EdmEquals(other.TypeUsage);
        } 
        #endregion
    }
}

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

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