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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, 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.SQLException;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.id.insert.AbstractReturningDelegate;
import org.hibernate.id.insert.IdentifierGeneratingInsert;
import org.hibernate.id.insert.InsertGeneratedIdentifierDelegate;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.sql.Insert;
import org.hibernate.type.Type;
import org.jboss.logging.Logger;
/**
* A generator which combines sequence generation with immediate retrieval
* through JDBC3 {@link java.sql.Connection#prepareStatement(String, String[]) getGeneratedKeys}.
* In this respect it works much like ANSI-SQL IDENTITY generation.
*
* This generator only known to work with newer Oracle drivers compiled for
* JDK 1.4 (JDBC3).
*
* Note: Due to a bug in Oracle drivers, sql comments on these insert statements
* are completely disabled.
*
* @author Steve Ebersole
*/
public class SequenceIdentityGenerator
extends SequenceGenerator
implements PostInsertIdentifierGenerator {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(
CoreMessageLogger.class,
SequenceIdentityGenerator.class.getName()
);
@Override
public Serializable generate(SessionImplementor s, Object obj) {
return IdentifierGeneratorHelper.POST_INSERT_INDICATOR;
}
public InsertGeneratedIdentifierDelegate getInsertGeneratedIdentifierDelegate(
PostInsertIdentityPersister persister,
Dialect dialect,
boolean isGetGeneratedKeysEnabled) throws HibernateException {
return new Delegate( persister, dialect, getSequenceName() );
}
@Override
public void configure(Type type, Properties params, Dialect dialect) throws MappingException {
super.configure( type, params, dialect );
}
public static class Delegate extends AbstractReturningDelegate {
private final Dialect dialect;
private final String sequenceNextValFragment;
private final String[] keyColumns;
public Delegate(PostInsertIdentityPersister persister, Dialect dialect, String sequenceName) {
super( persister );
this.dialect = dialect;
this.sequenceNextValFragment = dialect.getSelectSequenceNextValString( sequenceName );
this.keyColumns = getPersister().getRootTableKeyColumnNames();
if ( keyColumns.length > 1 ) {
throw new HibernateException( "sequence-identity generator cannot be used with with multi-column keys" );
}
}
public IdentifierGeneratingInsert prepareIdentifierGeneratingInsert() {
NoCommentsInsert insert = new NoCommentsInsert( dialect );
insert.addColumn( getPersister().getRootTableKeyColumnNames()[0], sequenceNextValFragment );
return insert;
}
@Override
protected PreparedStatement prepare(String insertSQL, SessionImplementor session) throws SQLException {
return session.getTransactionCoordinator().getJdbcCoordinator().getStatementPreparer().prepareStatement( insertSQL, keyColumns );
}
@Override
protected Serializable executeAndExtract(PreparedStatement insert, SessionImplementor session) throws SQLException {
session.getTransactionCoordinator().getJdbcCoordinator().getResultSetReturn().executeUpdate( insert );
return IdentifierGeneratorHelper.getGeneratedIdentity(
insert.getGeneratedKeys(),
getPersister().getRootTableKeyColumnNames()[0],
getPersister().getIdentifierType()
);
}
}
public static class NoCommentsInsert extends IdentifierGeneratingInsert {
public NoCommentsInsert(Dialect dialect) {
super( dialect );
}
@Override
public Insert setComment(String comment) {
// don't allow comments on these insert statements as comments totally
// blow up the Oracle getGeneratedKeys "support" :(
LOG.disallowingInsertStatementComment();
return this;
}
}
}