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Java > Open Source Codes > org > xquark > extractor > xfunctions > XfLowerCase


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */

22
23 package org.xquark.extractor.xfunctions;
24
25 import org.xquark.extractor.algebra.Expression;
26 import org.xquark.extractor.sql.SqlExpression;
27
28 /**
29 3.5.16 xf:lower-case
30 3.5.16.1 Signature
31 xf:lower-case(string $srcval) => string
32
33 3.5.16.2 Parameters
34 $srcval static type is string
35
36 3.5.16.3 Semantics
37 Returns the value of $srcval after translating every upper-case letter to its lower-case
38 correspondent. Every upper-case letter that does not have a lower-case correspondent, and every
39 character that is not an upper-case letter, is included in the output in its original form.
40
41 An "upper-case letter" is a character whose Unicode General Category class includes "Lu". The
42 corresponding lower-case letter is determined using [Unicode Case Mappings].
43
44 3.5.16.4 Examples
45 xf:lower-case("ABc!D") returns "abc!d".
46  */

47 public final class XfLowerCase extends Xfunction_String
48 {
49
50     private static final String JavaDoc RCSRevision = "$Revision: 1.3 $";
51     private static final String JavaDoc RCSName = "$Name: $";
52
53     public XfLowerCase()
54     {
55       super("XfLowerCase");
56     }
57
58     public XfLowerCase(Expression arg )
59     {
60       super("XfLowerCase");
61       setArgument(0,arg);
62     }
63
64     public SqlExpression accept(org.xquark.extractor.algebra.GenSqlVisitor visitor)
65     {
66         return visitor.visit(this);
67     }
68
69     public void accept(org.xquark.extractor.algebra.AlgebraVisitor visitor)
70     {
71         visitor.visit(this);
72     }
73 }
74
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