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1 package org.apache.torque.adapter; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Turbine" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache Turbine", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>. 55 */ 56 57 import java.sql.Connection; 58 import java.sql.SQLException; 59 import java.sql.Statement; 60 61 /*** 62 * This is used to connect to SapDB databases. 63 * 64 * <a href="http://www.sapdb.org">http://www.sapdb.org</a> 65 * 66 * @author <a href="mailto:dave.polito@planetcad.com">Dave Polito</a> 67 * @version $Id: DBSapDB.java,v 1.7 2002/06/02 15:36:23 mpoeschl Exp $ 68 */ 69 public class DBSapDB extends DB 70 { 71 /*** 72 * Empty constructor. 73 */ 74 protected DBSapDB() 75 { 76 } 77 78 /*** 79 * This method is used to ignore case. 80 * 81 * @param in The string to transform to upper case. 82 * @return The upper case string. 83 */ 84 public String toUpperCase(String in) 85 { 86 return new StringBuffer("UPPER(").append(in).append(")").toString(); 87 } 88 89 /*** 90 * This method is used to ignore case. 91 * 92 * @param in The string whose case to ignore. 93 * @return The string in a case that can be ignored. 94 */ 95 public String ignoreCase(String in) 96 { 97 return new StringBuffer("UPPER(").append(in).append(")").toString(); 98 } 99 100 /*** 101 * @see org.apache.torque.adapter.DB#getIDMethodType() 102 */ 103 public String getIDMethodType() 104 { 105 return SEQUENCE; 106 } 107 108 /*** 109 * Returns the next key from a sequence. Uses the following 110 * implementation: 111 * 112 * <blockquote><code><pre> 113 * select sequenceName.nextval from dual 114 * </pre></code></blockquote> 115 * 116 * @param sequenceName The name of the sequence (should be of type 117 * <code>String</code>). 118 * @return SQL to retreive the next database key. 119 * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object) 120 */ 121 public String getIDMethodSQL(Object sequenceName) 122 { 123 return ("select " + sequenceName + ".nextval from dual"); 124 } 125 126 /*** 127 * Locks the specified table. 128 * 129 * @param con The JDBC connection to use. 130 * @param table The name of the table to lock. 131 * @exception SQLException No Statement could be created or executed. 132 */ 133 public void lockTable(Connection con, String table) throws SQLException 134 { 135 Statement statement = con.createStatement(); 136 137 StringBuffer stmt = new StringBuffer(); 138 stmt.append("SELECT next_id FROM ") 139 .append(table) 140 .append(" FOR UPDATE"); 141 142 statement.executeQuery(stmt.toString()); 143 } 144 145 /*** 146 * This method is for the SqlExpression.quoteAndEscape rules. The rule is, 147 * any string in a SqlExpression with a BACKSLASH will either be changed to 148 * "//" or left as "\". SapDB does not need the escape character. 149 * 150 * @return false. 151 */ 152 153 public boolean escapeText() 154 { 155 return false; 156 } 157 158 /*** 159 * Unlocks the specified table. 160 * 161 * @param con The JDBC connection to use. 162 * @param table The name of the table to unlock. 163 * @exception SQLException No Statement could be created or 164 * executed. 165 */ 166 public void unlockTable(Connection con, String table) throws SQLException 167 { 168 // Tables in SapDB are unlocked when a commit is issued. The 169 // user may have issued a commit but do it here to be sure. 170 con.commit(); 171 } 172 }

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