/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.cache.concurrent;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public class Item
{
private static final AtomicLong generator = new AtomicLong(0);
final long serial = generator.incrementAndGet();
final int hashCode = (int)(serial % Integer.MAX_VALUE);
Item previous;
Item next;
/**
* This is final on purpose, we rely on object equality in the concurrent has
*/
public final boolean equals(Object obj)
{
return obj != null && ((Item)obj).serial == serial;
}
/**
* This is final on purpose, we rely on object equality in the concurrent has
*/
public final int hashCode()
{
return hashCode;
}
}