mod-db seems to have a nice structure. I didn't realize right away that the other db
actions lacked general support for attributes as source values.
Anyway, here is an AutoIncrementHelper for mysql.
/*****************************************************************************
* Copyright (C) The Apache Software Foundation. All rights reserved. *
* ------------------------------------------------------------------------- *
* This software is published under the terms of the Apache Software License *
* version 1.1, a copy of which has been included with this distribution in *
* the LICENSE file. *
*****************************************************************************/
package org.apache.cocoon.acting.ModularDatabaseAccess;
import java.lang.Integer;
import java.util.SortedSet;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Types;
import java.sql.SQLException;
import org.apache.cocoon.environment.Request;
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: MYSQL AUTO_INCREMENT columns
* {@link http://www.mysql.com}
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Christian Haul</a>
* @version CVS $Id: HsqlIdentityAutoIncrementHelper.java,v 1.1 2001/11/26 09:28:08
haul Exp $
*/
public class MysqlAutoIncrementHelper implements AutoIncrementHelper, ThreadSafe {
public Object getPostValue( Configuration tableConf, Configuration columnConf,
Configuration modeConf,
Connection conn, Statement stmt, Request request )
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, Request request ) throws SQLException,
ConfigurationException {
return null;
};
public String getSubquery( Configuration tableConf, Configuration columnConf,
Configuration modeConf )
throws ConfigurationException {
return null;
};
}
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