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


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 6.2.3 xf:date
30 xf:date(string $srcval) => date
31 If the value of $srcval conforms to the lexical representation of a date as defined in [XML Schema
32 Part 2: Datatypes], the constructor returns the date corresponding to that representation.
33 Otherwise, the constructor returns the error value as defined in [XQuery 1.0 and XPath 2.0 Data
34 Model].
35
36 6.2.3.1 Examples
37 xf:date("2001-5-31") returns a date value corresponding to the 31st of May, 2001.
38
39 xf:date("2001-4-31") returns an error.
40  */
41 public final class XfDate extends XFunction
42 {
43
44     private static final String JavaDoc RCSRevision = "$Revision: 1.3 $";
45     private static final String JavaDoc RCSName = "$Name: $";
46
47
48     /**
49     @roseuid 3BD1922C02D6
50      */
51     public XfDate()
52     {
53         super("XfDate");
54     }
55
56     /**
57     @param dateString
58     @roseuid 3BD1916E0214
59      */
60     public XfDate(Expression arg0)
61     {
62         super("XfDate");
63         setArgument(0, arg0);
64     }
65
66     /**
67     @param visitor
68     @return org.xquark.extractor.sql.SqlExpression
69     @throws org.xquark.extractor.common.SqlWrapperException
70     @roseuid 3BD1922C02F4
71      */
72     public SqlExpression accept(org.xquark.extractor.algebra.GenSqlVisitor visitor)
73     {
74         return visitor.visit(this);
75     }
76
77     public void accept(org.xquark.extractor.algebra.AlgebraVisitor visitor)
78     {
79         visitor.visit(this);
80     }
81 }
82
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