org.hibernate.envers.enhanced.OrderedSequenceGenerator Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, Red Hat Inc. 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 Inc.
*
* 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.envers.enhanced;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.id.enhanced.SequenceStyleGenerator;
import org.hibernate.internal.util.StringHelper;
/**
* Revision number generator has to produce values in ascending order (gaps may occur).
*
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public class OrderedSequenceGenerator extends SequenceStyleGenerator {
@Override
public String[] sqlCreateStrings(Dialect dialect) throws HibernateException {
String[] create = super.sqlCreateStrings( dialect );
if ( dialect instanceof Oracle8iDialect ) {
// Make sure that sequence produces increasing values in Oracle RAC environment.
create = StringHelper.suffix( create, " order" );
}
return create;
}
}