/*

  * Copyright 2005-2007 The Kuali Foundation

  * 

  * $Source: /opt/cvs/rice/shared/src/main/java/org/apache/ojb/broker/platforms/KualiMySQLSequenceManagerImpl.java,v $

  * 

  * Licensed under the Educational Community License, Version 2.0 (the "License")

  ;

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  * 

  * http://www.opensource.org/licenses/ecl2.php

  * 

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.ojb.broker.platforms;

 import java.sql.Connection;

 import java.sql.ResultSet;

 import java.sql.Statement;

 import org.apache.ojb.broker.PersistenceBroker;

 import org.apache.ojb.broker.metadata.FieldDescriptor;

 import org.apache.ojb.broker.util.sequence.AbstractSequenceManager;

 import org.apache.ojb.broker.util.sequence.SequenceManagerException;

 public class KualiMySQLSequenceManagerImpl extends AbstractSequenceManager {

         public KualiMySQLSequenceManagerImpl(PersistenceBroker broker) {

                 super(broker);

         }

         @Override

         protected long getUniqueLong(FieldDescriptor arg0)

                         throws SequenceManagerException {

                 PersistenceBroker broker = getBrokerForClass();

                 Statement stmt = null;

                 Long seqNumber = null;

                 final String sequenceName = arg0.getSequenceName();

                 try {

                         //FIXME: should we be closing this connection in a finally block?

                         Connection c = broker.serviceConnectionManager().getConnection();

                         stmt = c.createStatement();

                         String sql = "INSERT INTO " + sequenceName + " VALUES (NULL);";

                         stmt.executeUpdate(sql);

                         sql = "SELECT LAST_INSERT_ID()";

                         //FIXME: should we be closing this result set in a finally block?

                         ResultSet rs = stmt.executeQuery(sql);

                         if (rs != null) {

                                 rs.first();

                                 seqNumber = rs.getLong(1);

                         }

                 } catch (Exception e) {

                         throw new RuntimeException("Unable to execute for sequence name: " + sequenceName, e);

                 } finally {

                         try {

                                 if (stmt != null) {

                                         stmt.close();

                                 }

                         } catch (Exception e) {

                                 throw new RuntimeException("Unable to close statement for sequence name: " + sequenceName, e);

                         }

                 }

                 return seqNumber;

         }

 }