Package org.apache.cocoon.components.modules.database

Source Code of org.apache.cocoon.components.modules.database.MysqlAutoIncrementModule

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* 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.cocoon.components.modules.database;

import java.lang.Integer;
import java.sql.PreparedStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.SQLException;
import java.util.Map;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.thread.ThreadSafe;

/**
* Abstraction layer to encapsulate different DBMS behaviour for autoincrement columns.
*
* Here: <a href="http://www.mysql.com">MYSQL</a> AUTO_INCREMENT columns
*
* @version $Id: MysqlAutoIncrementModule.java 587758 2007-10-24 02:55:27Z vgritsenko $
*/
public class MysqlAutoIncrementModule implements AutoIncrementModule, ThreadSafe {

    public Object getPostValue( Configuration tableConf, Configuration columnConf, Configuration modeConf,
                                Connection conn, Statement stmt, Map objectModel throws SQLException, ConfigurationException {

        Integer id = null;
        /*
          // if mysql did support callable statements ...  i'm not sure what what would go here, maybe:

          CallableStatement callStmt = conn.prepareCall("? = {CALL LAST_INSERT_ID()}");
          callStmt.registerOutParameter(1, Types.INTEGER);
          ResultSet resultSet = callStmt.executeQuery();
        */

        PreparedStatement pstmt = conn.prepareStatement("SELECT LAST_INSERT_ID()");
        ResultSet resultSet = pstmt.executeQuery();
        while ( resultSet.next() ) {
            id = new Integer(resultSet.getInt(1));
        }
        resultSet.close();

        return id;
    }


    public boolean includeInQuery() { return false; }


    public boolean includeAsValue() { return false; }


    public Object getPreValue( Configuration tableConf, Configuration columnConf, Configuration modeConf,
                               Connection conn, Map objectModel ) throws SQLException, ConfigurationException {

        return null;
    }

    public String getSubquery( Configuration tableConf, Configuration columnConf, Configuration modeConf )
        throws ConfigurationException {

        return null;
    }
}
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