/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc;
import java.lang.reflect.InvocationTargetException;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import javax.ejb.EJBException;
import org.jboss.deployment.DeploymentException;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMPFieldBridge;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCFieldBridge;
import org.jboss.ejb.EntityEnterpriseContext;
/**
* Base class for create commands where the PK value is generated as side
* effect of performing the insert operation. This is typically associated
* with database platforms that use identity columns
*
* @author <a href="mailto:jeremy@boynes.com">Jeremy Boynes</a>
*/
public abstract class JDBCIdentityColumnCreateCommand extends JDBCAbstractCreateCommand
{
protected JDBCCMPFieldBridge pkField;
protected String pkSQL;
protected boolean isInsertField(JDBCFieldBridge field)
{
// do not include PK fields in the insert
return super.isInsertField(field) && !field.isPrimaryKeyMember();
}
protected void initGeneratedFields() throws DeploymentException
{
super.initGeneratedFields();
pkField = getGeneratedPKField();
}
protected int executeInsert(int paramIndex, PreparedStatement ps, EntityEnterpriseContext ctx) throws SQLException
{
int rows = ps.executeUpdate();
Connection c;
Statement s = null;
ResultSet rs = null;
try {
c = ps.getConnection();
s = c.createStatement();
rs = s.executeQuery(pkSQL);
if (!rs.next()) {
throw new EJBException("ResultSet was empty");
}
pkField.loadInstanceResults(rs, 1, ctx);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
// throw EJBException to force a rollback as the row has been inserted
throw new EJBException("Error extracting generated key", e);
} finally {
JDBCUtil.safeClose(rs);
JDBCUtil.safeClose(s);
}
return rows;
}
/**
* Helper for subclasses that use reflection to avoid driver dependencies.
* @param t an Exception raised by a reflected call
* @return SQLException extracted from the Throwable
*/
protected SQLException processException(Throwable t) {
if (t instanceof InvocationTargetException) {
t = ((InvocationTargetException) t).getTargetException();
}
if (t instanceof SQLException) {
return (SQLException) t;
}
if (t instanceof RuntimeException) {
throw (RuntimeException) t;
}
if (t instanceof Error) {
throw (Error) t;
}
log.error(t);
throw new IllegalStateException();
}
}