/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, 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.id;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.CoreMessageLogger;
import org.jboss.logging.Logger;
/**
* Generates <tt>string</tt> values using the SQL Server NEWID() function.
*
* @author Joseph Fifield
*/
public class GUIDGenerator implements IdentifierGenerator {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, GUIDGenerator.class.getName());
private static boolean warned = false;
public GUIDGenerator() {
if ( ! warned ) {
warned = true;
LOG.deprecatedUuidGenerator(UUIDGenerator.class.getName(), UUIDGenerationStrategy.class.getName());
}
}
public Serializable generate(SessionImplementor session, Object obj)
throws HibernateException {
final String sql = session.getFactory().getDialect().getSelectGUIDString();
try {
PreparedStatement st = session.getTransactionCoordinator().getJdbcCoordinator().getStatementPreparer().prepareStatement( sql );
try {
ResultSet rs = st.executeQuery();
final String result;
try {
rs.next();
result = rs.getString(1);
}
finally {
rs.close();
}
LOG.guidGenerated(result);
return result;
}
finally {
st.close();
}
}
catch (SQLException sqle) {
throw session.getFactory().getSQLExceptionHelper().convert(
sqle,
"could not retrieve GUID",
sql
);
}
}
}