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 code should be used for an Interbase database pool.
63 *
64 * @author <a href="mailto:frank@opticode.co.za">Frank Conradie</a>
65 * @version $Id: DBInterbase.java,v 1.7 2003/05/11 12:59:07 mpoeschl Exp $
66 */
67 public class DBInterbase extends DB
68 {
69 /***
70 * This method is used to ignore case.
71 *
72 * @param in The string to transform to upper case.
73 * @return The upper case string.
74 */
75 public String toUpperCase(String in)
76 {
77 return new StringBuffer("UPPER(").append(in).append(")").toString();
78 }
79
80 /***
81 * This method is used to ignore case.
82 *
83 * @param in The string whose case to ignore.
84 * @return The string in a case that can be ignored.
85 */
86 public String ignoreCase(String in)
87 {
88 return new StringBuffer("UPPER(").append(in).append(")").toString();
89 }
90
91 /***
92 * This method is used to ignore case in an ORDER BY clause.
93 * Usually it is the same as ignoreCase, but some databases
94 * (Interbase for example) does not use the same SQL in ORDER BY
95 * and other clauses.
96 *
97 * @param in The string whose case to ignore.
98 * @return The string in a case that can be ignored.
99 */
100 public String ignoreCaseInOrderBy(String in)
101 {
102 return in;
103 }
104
105 /***
106 * Gets the string delimiter (usually '\'').
107 *
108 * @return The delimiter.
109 */
110 public char getStringDelimiter()
111 {
112 return '\'';
113 }
114
115 /***
116 * @see org.apache.torque.adapter.DB#getIDMethodType()
117 */
118 public String getIDMethodType()
119 {
120 return NO_ID_METHOD;
121 }
122
123 /***
124 * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj)
125 */
126 public String getIDMethodSQL(Object obj)
127 {
128 return null;
129 }
130
131 /***
132 * Locks the specified table.
133 *
134 * @param con The JDBC connection to use.
135 * @param table The name of the table to lock.
136 * @exception SQLException No Statement could be created or executed.
137 */
138 public void lockTable(Connection con, String table) throws SQLException
139 {
140 Statement statement = con.createStatement();
141
142 StringBuffer stmt = new StringBuffer();
143 stmt.append("SET TRANSACTION ")
144 .append("ISOLATION LEVEL READ COMMITTED ")
145 .append("NO RECORD_VERSION WAIT ")
146 .append("RESERVING ")
147 .append(table)
148 .append(" FOR PROTECTED WRITE");
149
150 statement.executeQuery(stmt.toString());
151 }
152
153 /***
154 * Unlocks the specified table.
155 *
156 * @param con The JDBC connection to use.
157 * @param table The name of the table to unlock.
158 * @exception SQLException No Statement could be created or executed.
159 */
160 public void unlockTable(Connection con, String table) throws SQLException
161 {
162 // Tables in Interbase are unlocked when a commit is issued.
163 // The user may have issued a commit but do it here to be
164 // sure.
165 con.commit();
166 }
167 }