105 lines
3.8 KiB
C#
105 lines
3.8 KiB
C#
//
|
|
// CollectionFromEnumerable.cs
|
|
//
|
|
// Author:
|
|
// Leszek Ciesielski (skolima@gmail.com)
|
|
//
|
|
// (C) 2011 Leszek Ciesielski
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining
|
|
// a copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to
|
|
// permit persons to whom the Software is furnished to do so, subject to
|
|
// the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be
|
|
// included in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
|
|
namespace Microsoft.Build.Internal
|
|
{
|
|
internal class CollectionFromEnumerable<T> : ICollection<T>
|
|
{
|
|
IEnumerable<T> backingEnumerable;
|
|
|
|
public CollectionFromEnumerable (IEnumerable<T> enumerable)
|
|
{
|
|
backingEnumerable = enumerable;
|
|
}
|
|
|
|
public void Add (T item)
|
|
{
|
|
throw new InvalidOperationException ("This collection is read-only.");
|
|
}
|
|
|
|
public void Clear ()
|
|
{
|
|
throw new InvalidOperationException ("This collection is read-only.");
|
|
}
|
|
|
|
public bool Contains (T item)
|
|
{
|
|
List<T> backingList = backingEnumerable as List<T>;
|
|
if (backingList != null)
|
|
return backingList.Contains (item);
|
|
return backingEnumerable.Contains (item);
|
|
}
|
|
|
|
public void CopyTo (T[] array, int arrayIndex)
|
|
{
|
|
List<T> backingList = backingEnumerable as List<T>;
|
|
if (backingList != null) {
|
|
backingList.CopyTo (array, arrayIndex);
|
|
return;
|
|
}
|
|
int i = arrayIndex;
|
|
foreach (var item in backingEnumerable) {
|
|
array[i++] = item;
|
|
}
|
|
}
|
|
|
|
public int Count {
|
|
get {
|
|
var backingList = backingEnumerable as List<T>;
|
|
if(backingList == null)
|
|
backingEnumerable = backingList = new List<T> (backingEnumerable);
|
|
return backingList.Count;
|
|
}
|
|
}
|
|
|
|
public bool IsReadOnly {
|
|
get { return true; }
|
|
}
|
|
|
|
public bool Remove (T item)
|
|
{
|
|
throw new InvalidOperationException ("This collection is read-only.");
|
|
}
|
|
|
|
public IEnumerator<T> GetEnumerator ()
|
|
{
|
|
return backingEnumerable.GetEnumerator ();
|
|
}
|
|
|
|
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator ()
|
|
{
|
|
return backingEnumerable.GetEnumerator ();
|
|
}
|
|
}
|
|
}
|