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


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 2.6.1 xf:floor
30 2.6.1.1 Signature
31 xf:floor(double $srcval) => integer
32
33 2.6.1.2 Parameters
34 $srcval static type is double
35
36 2.6.1.3 Semantics
37 Returns the largest (closest to positive infinity) number that is not greater than the value of
38 $srcvaland that is an integer.
39
40 2.6.1.4 Examples
41 xf:floor(10.5) returns 10.
42
43 xf:floor(-10.5) returns -11.
44  */

45 public final class XfFloor extends Xfunction_Integer
46 {
47
48     private static final String JavaDoc RCSRevision = "$Revision: 1.3 $";
49     private static final String JavaDoc RCSName = "$Name: $";
50
51     public XfFloor()
52     {
53       super("XfFloor");
54     }
55
56     public XfFloor(Expression arg )
57     {
58       super("XfFloor");
59       setArgument(0,arg);
60     }
61
62     public SqlExpression accept(org.xquark.extractor.algebra.GenSqlVisitor visitor)
63     {
64         return visitor.visit(this);
65     }
66
67     public void accept(org.xquark.extractor.algebra.AlgebraVisitor visitor)
68     {
69         visitor.visit(this);
70     }
71 }
72
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