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 }