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


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 3.5.8 xf:string-length
30 3.5.8.1 Signature
31 xf:string-length(string $srcval) => integer
32
33 3.5.8.2 Parameters
34 $srcval — static type is string
35
36 3.5.8.3 Semantics
37 Returns an integer equal to the length in characters of the value of $srcval.
38
39 3.5.8.4 Examples
40 xf:string-length("first we kill the lawyers") returns 25.
41  */
42 public final class XfStringLength extends Xfunction_Integer
43 {
44
45     private static final String JavaDoc RCSRevision = "$Revision: 1.3 $";
46     private static final String JavaDoc RCSName = "$Name: $";
47
48
49     public XfStringLength()
50     {
51       super("XfStringLength");
52     }
53     public XfStringLength( Expression arg)
54     {
55         super("XfStringLength");
56         setArgument(0, arg);
57     }
58
59     public SqlExpression accept(org.xquark.extractor.algebra.GenSqlVisitor visitor)
60     {
61         return visitor.visit(this);
62     }
63
64     public void accept(org.xquark.extractor.algebra.AlgebraVisitor visitor)
65     {
66         visitor.visit(this);
67     }
68 }
69
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