org.hibernate.id.insert.AbstractSelectingDelegate Maven / Gradle / Ivy
/*
* 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.id.insert;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.id.PostInsertIdentityPersister;
import org.hibernate.pretty.MessageHelper;
/**
* Abstract InsertGeneratedIdentifierDelegate implementation where the
* underlying strategy requires an subsequent select after the insert
* to determine the generated identifier.
*
* @author Steve Ebersole
*/
public abstract class AbstractSelectingDelegate implements InsertGeneratedIdentifierDelegate {
private final PostInsertIdentityPersister persister;
protected AbstractSelectingDelegate(PostInsertIdentityPersister persister) {
this.persister = persister;
}
public final Serializable performInsert(
String insertSQL,
SessionImplementor session,
Binder binder) {
try {
// prepare and execute the insert
PreparedStatement insert = session.getTransactionCoordinator()
.getJdbcCoordinator()
.getStatementPreparer()
.prepareStatement( insertSQL, PreparedStatement.NO_GENERATED_KEYS );
try {
binder.bindValues( insert );
session.getTransactionCoordinator().getJdbcCoordinator().getResultSetReturn().executeUpdate( insert );
}
finally {
session.getTransactionCoordinator().getJdbcCoordinator().release( insert );
}
}
catch ( SQLException sqle ) {
throw session.getFactory().getSQLExceptionHelper().convert(
sqle,
"could not insert: " + MessageHelper.infoString( persister ),
insertSQL
);
}
final String selectSQL = getSelectSQL();
try {
//fetch the generated id in a separate query
PreparedStatement idSelect = session.getTransactionCoordinator()
.getJdbcCoordinator()
.getStatementPreparer()
.prepareStatement( selectSQL, false );
try {
bindParameters( session, idSelect, binder.getEntity() );
ResultSet rs = session.getTransactionCoordinator().getJdbcCoordinator().getResultSetReturn().extract( idSelect );
try {
return getResult( session, rs, binder.getEntity() );
}
finally {
session.getTransactionCoordinator().getJdbcCoordinator().release( rs, idSelect );
}
}
finally {
session.getTransactionCoordinator().getJdbcCoordinator().release( idSelect );
}
}
catch ( SQLException sqle ) {
throw session.getFactory().getSQLExceptionHelper().convert(
sqle,
"could not retrieve generated id after insert: " + MessageHelper.infoString( persister ),
insertSQL
);
}
}
/**
* Get the SQL statement to be used to retrieve generated key values.
*
* @return The SQL command string
*/
protected abstract String getSelectSQL();
/**
* Bind any required parameter values into the SQL command {@link #getSelectSQL}.
*
* @param session The session
* @param ps The prepared {@link #getSelectSQL SQL} command
* @param entity The entity being saved.
* @throws SQLException
*/
protected void bindParameters(
SessionImplementor session,
PreparedStatement ps,
Object entity) throws SQLException {
}
/**
* Extract the generated key value from the given result set.
*
* @param session The session
* @param rs The result set containing the generated primay key values.
* @param entity The entity being saved.
* @return The generated identifier
* @throws SQLException
*/
protected abstract Serializable getResult(
SessionImplementor session,
ResultSet rs,
Object entity) throws SQLException;
}