ExpressionFunctionLCase


1   /* =============================================================
2    * SmallSQL : a free Java DBMS library for the Java(tm) platform
3    * =============================================================
4    *
5    * (C) Copyright 2004-2006, by Volker Berlin.
6    *
7    * Project Info:  http://www.smallsql.de/
8    *
9    * This library is free software; you can redistribute it and/or modify it 
10   * under the terms of the GNU Lesser General Public License as published by 
11   * the Free Software Foundation; either version 2.1 of the License, or 
12   * (at your option) any later version.
13   *
14   * This library is distributed in the hope that it will be useful, but 
15   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
16   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
17   * License for more details.
18   *
19   * You should have received a copy of the GNU Lesser General Public
20   * License along with this library; if not, write to the Free Software
21   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
22   * USA.  
23   *
24   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
25   * in the United States and other countries.]
26   *
27   * ---------------
28   * ExpressionFunctionLCase.java
29   * ---------------
30   * Author: Volker Berlin
31   * 
32   * Created on 17.06.2006
33   */
34  package smallsql.database;
35  
36  
37  /**
38   * @author Volker Berlin
39   */
40  public class ExpressionFunctionLCase extends ExpressionFunctionReturnP1StringAndBinary {
41  
42      final int getFunction() {
43          return SQLTokenizer.LCASE;
44      }
45  
46  
47      final boolean isNull() throws Exception   {
48          return param1.isNull();
49      }
50  
51  
52      final byte[] getBytes() throws Exception  {
53          if(isNull()) return null;
54          return getString().getBytes();
55      }
56      
57      
58      final String   getString() throws Exception   {
59          if(isNull()) return null;
60          return param1.getString().toLowerCase();
61      }
62  }
63
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