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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.action;

import java.io.Serializable;

/**
 * Acts as a stand-in for an entity identifier which is supposed to be
 * generated on insert (like an IDENTITY column) where the insert needed to
 * be delayed because we were outside a transaction when the persist
 * occurred (save currently still performs the insert).
 * 

* The stand-in is only used within the {@link org.hibernate.engine.PersistenceContext} * in order to distinguish one instance from another; it is never injected into * the entity instance or returned to the client... * * @author Steve Ebersole */ public class DelayedPostInsertIdentifier implements Serializable { private static long SEQUENCE = 0; private final long sequence; public DelayedPostInsertIdentifier() { synchronized( DelayedPostInsertIdentifier.class ) { if ( SEQUENCE == Long.MAX_VALUE ) { SEQUENCE = 0; } this.sequence = SEQUENCE++; } } public boolean equals(Object o) { if ( this == o ) { return true; } if ( o == null || getClass() != o.getClass() ) { return false; } final DelayedPostInsertIdentifier that = ( DelayedPostInsertIdentifier ) o; return sequence == that.sequence; } public int hashCode() { return ( int ) ( sequence ^ ( sequence >>> 32 ) ); } public String toString() { return ""; } }





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