118 lines
3.3 KiB
C#
118 lines
3.3 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.ServiceModel
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{
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Runtime.Serialization;
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public sealed class ExtensionCollection<T> : SynchronizedCollection<IExtension<T>>, IExtensionCollection<T>
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where T : IExtensibleObject<T>
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{
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T owner;
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public ExtensionCollection(T owner)
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{
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if (owner == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("owner");
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this.owner = owner;
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}
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public ExtensionCollection(T owner, object syncRoot)
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: base(syncRoot)
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{
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if (owner == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("owner");
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this.owner = owner;
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}
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bool ICollection<IExtension<T>>.IsReadOnly
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{
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get { return false; }
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}
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protected override void ClearItems()
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{
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IExtension<T>[] array;
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lock (this.SyncRoot)
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{
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array = new IExtension<T>[this.Count];
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this.CopyTo(array, 0);
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base.ClearItems();
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foreach (IExtension<T> extension in array)
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{
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extension.Detach(this.owner);
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}
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}
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}
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public E Find<E>()
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{
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List<IExtension<T>> items = this.Items;
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lock (this.SyncRoot)
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{
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for (int i = this.Count - 1; i >= 0; i--)
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{
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IExtension<T> item = items[i];
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if (item is E)
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return (E)item;
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}
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}
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return default(E);
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}
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public Collection<E> FindAll<E>()
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{
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Collection<E> result = new Collection<E>();
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List<IExtension<T>> items = this.Items;
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lock (this.SyncRoot)
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{
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for (int i = 0; i < items.Count; i++)
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{
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IExtension<T> item = items[i];
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if (item is E)
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result.Add((E)item);
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}
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}
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return result;
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}
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protected override void InsertItem(int index, IExtension<T> item)
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{
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if (item == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("item");
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lock (this.SyncRoot)
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{
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item.Attach(this.owner);
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base.InsertItem(index, item);
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}
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}
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protected override void RemoveItem(int index)
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{
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lock (this.SyncRoot)
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{
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this.Items[index].Detach(this.owner);
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base.RemoveItem(index);
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}
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}
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protected override void SetItem(int index, IExtension<T> item)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxCannotSetExtensionsByIndex)));
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}
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}
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}
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