//******************************
// Written by Peter Golde
// Copyright (c) 2004-2007, Wintellect
//
// Use and restribution of this code is subject to the license agreement
// contained in the file "License.txt" accompanying this file.
//******************************
using System;
using System.Collections;
using System.Collections.Generic;
namespace Wintellect.PowerCollections
{
///
/// A holder class for various internal utility functions that need to be shared.
///
internal static class Util
{
///
/// Wrap an enumerable so that clients can't get to the underlying
/// implementation via a down-case
///
/// Enumerable to wrap.
/// A wrapper around the enumerable.
public static IEnumerable CreateEnumerableWrapper(IEnumerable wrapped)
{
return new WrapEnumerable(wrapped);
}
///
/// Wrap an enumerable so that clients can't get to the underlying
/// implementation via a down-cast.
///
class WrapEnumerable : IEnumerable
{
IEnumerable wrapped;
///
/// Create the wrapper around an enumerable.
///
/// IEnumerable to wrap.
public WrapEnumerable(IEnumerable wrapped)
{
this.wrapped = wrapped;
}
public IEnumerator GetEnumerator()
{
return wrapped.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return ((IEnumerable)wrapped).GetEnumerator();
}
}
}
}