/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* 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.jboss.ejb.plugins.cmp.jdbc.bridge;
import java.io.Serializable;
import java.io.ObjectStreamException;
/**
* Type safe enumeration of message objects.
* Used by optmistic lock to lock fields and its values dependeding
* on the strategy used.
*
* @author <a href="mailto:aloubyansky@hotmail.com">Alex Loubyansky</a>
* @version $Revision: 81030 $
*/
public final class CMPMessage
implements Serializable
{
// Constants ------------------------------------------------
private static int nextOrdinal = 0;
private static final CMPMessage[] VALUES = new CMPMessage[5];
public static final CMPMessage CHANGED = new CMPMessage("CHANGED");
public static final CMPMessage ACCESSED = new CMPMessage("ACCESSED");
private final transient String name;
private final int ordinal;
// Constructor ----------------------------------------------
private CMPMessage(String name)
{
this.name = name;
this.ordinal = nextOrdinal++;
VALUES[ordinal] = this;
}
// Public ---------------------------------------------------
public String toString()
{
return name;
}
// Package --------------------------------------------------
Object readResolve()
throws ObjectStreamException
{
return VALUES[ordinal];
}
}