| /* |
| * 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.sql.Connection; |
| import java.sql.SQLException; |
| import java.sql.Statement; |
| 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.mckoi.org">McKoi</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:haul@apache.org">Christian Haul</a> |
| * @version CVS $Id$ |
| */ |
| public class McKoiSequenceModule implements AutoIncrementModule, ThreadSafe { |
| |
| public Object getPostValue( |
| Configuration tableConf, |
| Configuration columnConf, |
| Configuration modeConf, |
| Connection conn, |
| Statement stmt, |
| Map objectModel) |
| throws SQLException, ConfigurationException { |
| return null; |
| } |
| |
| public boolean includeInQuery() { |
| return true; |
| } |
| |
| 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 { |
| |
| String sequence = modeConf.getAttribute("sequence", null); |
| StringBuffer queryBuffer = new StringBuffer(); |
| queryBuffer.append(" NEXTVAL('"); |
| if (sequence != null) { |
| queryBuffer.append(sequence); |
| } else { |
| queryBuffer.append(tableConf.getAttribute("name", "")); |
| queryBuffer.append('_'); |
| queryBuffer.append(columnConf.getAttribute("name")); |
| queryBuffer.append("_seq"); |
| } |
| queryBuffer.append("')"); |
| |
| return queryBuffer.toString(); |
| } |
| } |