//
//  CacheItemComparer.cs
//
//  Author:
//    Marek Habersack <grendel@twistedcode.net>
//
//  Copyright (c) 2010, Marek Habersack
//
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification, are permitted
//  provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice, this list of
//       conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice, this list of
//       conditions and the following disclaimer in the documentation and/or other materials
//       provided with the distribution.
//     * Neither the name of Marek Habersack nor the names of its contributors may be used to
//       endorse or promote products derived from this software without specific prior written
//       permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
//  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
//  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
//  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
//  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
using System;
using System.Collections;
using System.Web.Caching;

namespace Tester
{
	class CacheItemComparer : IComparer
	{
		public int Compare (object o1, object o2)
		{
			CacheItem x = o1 as CacheItem;
			CacheItem y = o2 as CacheItem;
			
			if (x == null && y == null)
				return 0;

			if (x == null)
				return 1;

			if (y == null)
				return -1;

			if (x.ExpiresAt == y.ExpiresAt)
				return 0;
			
			return x.ExpiresAt < y.ExpiresAt ? -1 : 1;
		}
	}
}