| /* |
| * 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.postgres.org">PostgreSQL</a> |
| * sequences. The default sequence name is constructed from the table |
| * name, a "_", the column name, and the suffix "_seq". To use a |
| * different sequence name, set an attribute "sequence" for the |
| * modeConf e.g. <mode name="auto" type="auto" sequence="my_sequence"/>. |
| * |
| * @author <a href="mailto:pmhahn@titan.lahn.de">Philipp Hahn</a> |
| * @version CVS $Id$ |
| */ |
| public class PgsqlAutoIncrementModule implements AutoIncrementModule, ThreadSafe { |
| |
| public Object getPostValue( Configuration tableConf, Configuration columnConf, Configuration modeConf, |
| Connection conn, Statement stmt, Map objectModel ) throws SQLException, ConfigurationException { |
| |
| Integer id = null; |
| /* |
| // Postgres does 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(); |
| */ |
| |
| String sequence = modeConf.getAttribute("sequence",null); |
| |
| StringBuffer queryBuffer = new StringBuffer("SELECT currval('"); |
| if (sequence != null) { |
| queryBuffer.append(sequence); |
| } else { |
| queryBuffer.append(tableConf.getAttribute("name","")); |
| queryBuffer.append('_'); |
| queryBuffer.append(columnConf.getAttribute("name")); |
| queryBuffer.append("_seq"); |
| } |
| queryBuffer.append("')"); |
| |
| PreparedStatement pstmt = conn.prepareStatement(queryBuffer.toString()); |
| 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; |
| } |
| } |