/
ExtensionCollection.cs
126 lines (105 loc) · 3.29 KB
/
ExtensionCollection.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using System.Collections.ObjectModel;
namespace System.ServiceModel
{
public sealed class ExtensionCollection<T> : SynchronizedCollection<IExtension<T>>, IExtensionCollection<T>
where T : IExtensibleObject<T>
{
private T _owner;
public ExtensionCollection(T owner)
{
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(owner));
}
_owner = owner;
}
public ExtensionCollection(T owner, object syncRoot)
: base(syncRoot)
{
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(owner));
}
_owner = owner;
}
bool ICollection<IExtension<T>>.IsReadOnly
{
get { return false; }
}
protected override void ClearItems()
{
IExtension<T>[] array;
lock (SyncRoot)
{
array = new IExtension<T>[Count];
CopyTo(array, 0);
base.ClearItems();
foreach (IExtension<T> extension in array)
{
extension.Detach(_owner);
}
}
}
public E Find<E>()
{
List<IExtension<T>> items = Items;
lock (SyncRoot)
{
for (int i = 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 = Items;
lock (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(nameof(item));
}
lock (SyncRoot)
{
item.Attach(_owner);
base.InsertItem(index, item);
}
}
protected override void RemoveItem(int index)
{
lock (SyncRoot)
{
Items[index].Detach(_owner);
base.RemoveItem(index);
}
}
protected override void SetItem(int index, IExtension<T> item)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SRP.SFxCannotSetExtensionsByIndex));
}
}
}