?? dbderby.java
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package org.apache.torque.adapter;/* * Copyright 2001-2004 The Apache Software Foundation. * * Licensed 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. */import java.sql.Connection;import java.sql.SQLException;import java.sql.Statement;/** * This is used to connect to an embedded Apache Derby Database using * the supplied JDBC driver. * * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> * @version $Id: DBDerby.java,v 1.3 2005/06/01 21:06:31 tfischer Exp $ */public class DBDerby extends DB{ /** * Empty constructor. */ protected DBDerby() { } /** * This method is used to ignore case. * * @param str The string to transform to upper case. * @return The upper case string. */ public String toUpperCase(String str) { return new StringBuffer("UPPER(") .append(str) .append(")") .toString(); } /** * This method is used to ignore case. * * @param str The string whose case to ignore. * @return The string in a case that can be ignored. */ public String ignoreCase(String str) { return toUpperCase(str); } /** * @see org.apache.torque.adapter.DB#getIDMethodType() */ public String getIDMethodType() { return NO_ID_METHOD; // @todo IDENTITY; } /** * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj) */ public String getIDMethodSQL(Object obj) { return ""; // @todo VALUES IDENTITY_VAL_LOCAL()"; } /** * Locks the specified table. * * @param con The JDBC connection to use. * @param table The name of the table to lock. * @exception SQLException No Statement could be created or executed. */ public void lockTable(Connection con, String table) throws SQLException { Statement statement = con.createStatement(); StringBuffer stmt = new StringBuffer(); stmt.append("LOCK TABLE ") .append(table).append(" IN EXCLUSIVE MODE"); statement.executeUpdate(stmt.toString()); } /** * Unlocks the specified table. * * @param con The JDBC connection to use. * @param table The name of the table to unlock. * @exception SQLException No Statement could be created or executed. */ public void unlockTable(Connection con, String table) throws SQLException { } /** * This method is used to check whether the database supports * limiting the size of the resultset. * * @return LIMIT_STYLE_DB2. */ public int getLimitStyle() { return DB.LIMIT_STYLE_DB2; }}
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