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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;
// This file was generated, please do not edit it directly.
//
// This file was generated using the common file located at:
namespace MS.Internal
{
/// <summary>
/// Helper WeakHashSet class implemented using WeakHashTable
/// </summary>
internal class WeakHashSet<T> : ICollection<T> where T : class
{
#region ICollection<T> Members
public void Add(T item)
{
if (!_hashTable.ContainsKey(item))
{
_hashTable.SetWeak(item, null);
}
}
public void Clear()
{
_hashTable.Clear();
}
public bool Contains(T item)
{
return _hashTable.ContainsKey(item);
}
public void CopyTo(T[] array, int arrayIndex)
{
ArgumentOutOfRangeException.ThrowIfNegative(arrayIndex);
ArgumentNullException.ThrowIfNull(array);
int count = 0;
foreach (T item in this)
{
count++;
}
ArgumentOutOfRangeException.ThrowIfGreaterThan(arrayIndex, array.Length - count);
foreach (T item in this)
{
array[arrayIndex++] = item;
}
}
public int Count
{
get
{
return _hashTable.Count;
}
}
public bool IsReadOnly
{
get { return false; }
}
public bool Remove(T item)
{
if (_hashTable.ContainsKey(item))
{
_hashTable.Remove(item);
return true;
}
return false;
}
#endregion
#region IEnumerable<T> Members
public IEnumerator<T> GetEnumerator()
{
foreach (object key in _hashTable.Keys)
{
WeakHashtable.EqualityWeakReference objRef = key as WeakHashtable.EqualityWeakReference;
if (objRef != null)
{
T obj = objRef.Target as T;
if (obj != null)
{
yield return obj;
}
}
}
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return this.GetEnumerator();
}
#endregion
#region Private Data
WeakHashtable _hashTable = new WeakHashtable();
#endregion
}
}
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