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