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 Informix database pool.
63 *
64 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
65 * @author <a href="mailto:bpm@ec-group.com">Brian P Millett</a>
66 * @version $Id: DBInformix.java,v 1.6 2002/06/24 18:12:19 mpoeschl Exp $
67 */
68 public class DBInformix extends DB
69 {
70 /***
71 * Empty constructor.
72 */
73 protected DBInformix()
74 {
75 }
76
77 /***
78 * This method is used to ignore case. Problem is that Informix
79 * does not have an UPPER function. So the best would be to do
80 * nothing.
81 *
82 * @param in The string to transform to upper case.
83 * @return The upper case string.
84 */
85 public String toUpperCase(String in)
86 {
87 return in;
88 }
89
90 /***
91 * This method is used to ignore case. Problem is that Informix
92 * does not have an UPPER function. So the best would be to do
93 * nothing.
94 *
95 * @param in The string whose case to ignore.
96 * @return The string in a case that can be ignored.
97 */
98 public String ignoreCase(String in)
99 {
100 return in;
101 }
102
103 /***
104 * @see org.apache.torque.adapter.DB#getIDMethodType()
105 */
106 public String getIDMethodType()
107 {
108 return NO_ID_METHOD;
109 }
110
111 /***
112 * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj)
113 */
114 public String getIDMethodSQL(Object obj)
115 {
116 return null;
117 }
118
119 /***
120 * The method is used to lock a table.
121 *
122 * @param con The JDBC connection to use.
123 * @param table The name of the table to lock.
124 * @exception SQLException No Statement could be created or executed.
125 */
126 public void lockTable(Connection con, String table) throws SQLException
127 {
128 Statement statement = con.createStatement();
129
130 StringBuffer stmt = new StringBuffer();
131 stmt.append("LOCK TABLE ")
132 .append(table)
133 .append(" IN EXCLUSIVE MODE");
134
135 statement.executeQuery(stmt.toString());
136 }
137
138 /***
139 * The method is used to unlock a table.
140 *
141 * @param con The JDBC connection to use.
142 * @param table The name of the table to unlock.
143 * @exception SQLException No Statement could be created or executed.
144 */
145 public void unlockTable(Connection con, String table) throws SQLException
146 {
147 // Tables in Informix are unlocked when a commit is issued.
148 // The user may have issued a commit but do it here to be
149 // sure.
150 con.commit();
151 }
152 }