EntitySetBaseCollection.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / EntitySetBaseCollection.cs / 1 / EntitySetBaseCollection.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Common;
using System.Reflection; 
using System.Text;
using System.Diagnostics; 
 
namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Class representing a collection of entity set objects
    /// 
    internal sealed class EntitySetBaseCollection : MetadataCollection 
    {
        // This collection allows changes to be intercepted before and after they are passed to MetadataCollection.  The interception 
        // is required to update the EntitySet's back-reference to the EntityContainer. 

        #region Constructors 
        /// 
        /// Default constructor for constructing an empty collection
        /// 
        /// The entity container that has this entity set collection 
        /// Thrown if the argument entityContainer is null
        internal EntitySetBaseCollection(EntityContainer entityContainer) 
            : this(entityContainer, null) 
        {
        } 

        /// 
        /// The constructor for constructing the collection with the given items
        ///  
        /// The entity container that has this entity set collection
        /// The items to populate the collection 
        /// Thrown if the argument entityContainer is null 
        internal EntitySetBaseCollection(EntityContainer entityContainer, IEnumerable items)
            : base(items) 
        {
            EntityUtil.GenericCheckArgumentNull(entityContainer, "entityContainer");
            _entityContainer = entityContainer;
        } 
        #endregion
 
        #region Fields 
        private readonly EntityContainer _entityContainer;
        #endregion 

        #region Properties
        /// 
        /// Gets an item from the collection with the given index 
        /// 
        /// The index to search for 
        /// An item from the collection 
        /// Thrown if the index is out of the range for the Collection
        /// Always thrown on setter 
        public override EntitySetBase this[int index]
        {
            get
            { 
                return base[index];
            } 
            set 
            {
                throw EntityUtil.OperationOnReadOnlyCollection(); 
            }
        }

        ///  
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for 
        /// An item from the collection
        /// Thrown if identity argument passed in is null 
        /// Thrown if the Collection does not have an EntitySet with the given identity
        /// Always thrown on setter
        public override EntitySetBase this[string identity]
        { 
            get
            { 
                return base[identity]; 
            }
            set 
            {
                throw EntityUtil.OperationOnReadOnlyCollection();
            }
        } 
        #endregion
 
        #region Methods 
        /// 
        /// Adds an item to the collection 
        /// 
        /// The item to add to the list
        /// Thrown if item argument is null
        /// Thrown if the item passed in or the collection itself instance is in ReadOnly state 
        /// Thrown if the EntitySetBase that is being added already belongs to another EntityContainer
        /// Thrown if the EntitySetCollection already contains an EntitySet with the same identity 
        public override void Add(EntitySetBase item) 
        {
            EntityUtil.GenericCheckArgumentNull(item, "item"); 
            // Check to make sure the given entity set is not associated with another type
            ThrowIfItHasEntityContainer(item, "item");
            base.Add(item);
 
            // Fix up the declaring type
            item.ChangeEntityContainerWithoutCollectionFixup(_entityContainer); 
        } 

        ///  
        /// Checks if the given entity set already has a entity container, if so, throw an exception
        /// 
        /// The entity set to check for
        /// The name of the argument from the caller 
        private static void ThrowIfItHasEntityContainer(EntitySetBase entitySet, string argumentName)
        { 
            EntityUtil.GenericCheckArgumentNull(entitySet, argumentName); 
            if (entitySet.EntityContainer != null)
            { 
                throw EntityUtil.EntitySetInAnotherContainer(argumentName);
            }
        }
        #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; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Common;
using System.Reflection; 
using System.Text;
using System.Diagnostics; 
 
namespace System.Data.Metadata.Edm
{ 
    /// 
    /// Class representing a collection of entity set objects
    /// 
    internal sealed class EntitySetBaseCollection : MetadataCollection 
    {
        // This collection allows changes to be intercepted before and after they are passed to MetadataCollection.  The interception 
        // is required to update the EntitySet's back-reference to the EntityContainer. 

        #region Constructors 
        /// 
        /// Default constructor for constructing an empty collection
        /// 
        /// The entity container that has this entity set collection 
        /// Thrown if the argument entityContainer is null
        internal EntitySetBaseCollection(EntityContainer entityContainer) 
            : this(entityContainer, null) 
        {
        } 

        /// 
        /// The constructor for constructing the collection with the given items
        ///  
        /// The entity container that has this entity set collection
        /// The items to populate the collection 
        /// Thrown if the argument entityContainer is null 
        internal EntitySetBaseCollection(EntityContainer entityContainer, IEnumerable items)
            : base(items) 
        {
            EntityUtil.GenericCheckArgumentNull(entityContainer, "entityContainer");
            _entityContainer = entityContainer;
        } 
        #endregion
 
        #region Fields 
        private readonly EntityContainer _entityContainer;
        #endregion 

        #region Properties
        /// 
        /// Gets an item from the collection with the given index 
        /// 
        /// The index to search for 
        /// An item from the collection 
        /// Thrown if the index is out of the range for the Collection
        /// Always thrown on setter 
        public override EntitySetBase this[int index]
        {
            get
            { 
                return base[index];
            } 
            set 
            {
                throw EntityUtil.OperationOnReadOnlyCollection(); 
            }
        }

        ///  
        /// Gets an item from the collection with the given identity
        ///  
        /// The identity of the item to search for 
        /// An item from the collection
        /// Thrown if identity argument passed in is null 
        /// Thrown if the Collection does not have an EntitySet with the given identity
        /// Always thrown on setter
        public override EntitySetBase this[string identity]
        { 
            get
            { 
                return base[identity]; 
            }
            set 
            {
                throw EntityUtil.OperationOnReadOnlyCollection();
            }
        } 
        #endregion
 
        #region Methods 
        /// 
        /// Adds an item to the collection 
        /// 
        /// The item to add to the list
        /// Thrown if item argument is null
        /// Thrown if the item passed in or the collection itself instance is in ReadOnly state 
        /// Thrown if the EntitySetBase that is being added already belongs to another EntityContainer
        /// Thrown if the EntitySetCollection already contains an EntitySet with the same identity 
        public override void Add(EntitySetBase item) 
        {
            EntityUtil.GenericCheckArgumentNull(item, "item"); 
            // Check to make sure the given entity set is not associated with another type
            ThrowIfItHasEntityContainer(item, "item");
            base.Add(item);
 
            // Fix up the declaring type
            item.ChangeEntityContainerWithoutCollectionFixup(_entityContainer); 
        } 

        ///  
        /// Checks if the given entity set already has a entity container, if so, throw an exception
        /// 
        /// The entity set to check for
        /// The name of the argument from the caller 
        private static void ThrowIfItHasEntityContainer(EntitySetBase entitySet, string argumentName)
        { 
            EntityUtil.GenericCheckArgumentNull(entitySet, argumentName); 
            if (entitySet.EntityContainer != null)
            { 
                throw EntityUtil.EntitySetInAnotherContainer(argumentName);
            }
        }
        #endregion 
    }
} 

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

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