1 /*************************************************************************
2  *
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * Copyright 2000, 2010 Oracle and/or its affiliates.
6  *
7  * OpenOffice.org - a multi-platform office productivity suite
8  *
9  * This file is part of OpenOffice.org.
10  *
11  * OpenOffice.org is free software: you can redistribute it and/or modify
12  * it under the terms of the GNU Lesser General Public License version 3
13  * only, as published by the Free Software Foundation.
14  *
15  * OpenOffice.org is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU Lesser General Public License version 3 for more details
19  * (a copy is included in the LICENSE file that accompanied this code).
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * version 3 along with OpenOffice.org.  If not, see
23  * <http://www.openoffice.org/license.html>
24  * for a copy of the LGPLv3 License.
25  *
26  ************************************************************************/
27 
28 import com.sun.star.form.binding.*;
29 
30 /**
31  *
32  * @author  fs@openoffice.org
33  */
34 public class NumericValidator extends ControlValidator
35 {
36 
37     /** Creates a new instance of NumericValidator */
38     public NumericValidator( )
39     {
40     }
41 
42     public String explainInvalid( Object Value )
43     {
44         try
45         {
46             double value = ((Double)Value).doubleValue();
47             if ( Double.compare( Double.NaN, value ) == 0 )
48                 return "This is NotANumber";
49             if ( !isProperRange( value ) )
50                 return "The value must be between 0 and 100";
51             if ( !isProperDigitCount( value ) )
52                 return "The value must have at most one decimal digit";
53         }
54         catch( java.lang.Exception e )
55         {
56             return "This is no valid number";
57         }
58         return "";
59     }
60 
61     public boolean isValid( Object Value )
62     {
63         try
64         {
65             double value = ((Double)Value).doubleValue();
66             if ( Double.compare( Double.NaN, value ) == 0 )
67                 return false;
68             if ( !isProperRange( value ) )
69                 return false;
70             if ( !isProperDigitCount( value ) )
71                 return false;
72             return true;
73         }
74         catch( java.lang.Exception e )
75         {
76         }
77         return false;
78     }
79 
80     private boolean isProperRange( double value)
81     {
82         return ( value >= 0 ) && ( value <= 100 );
83     }
84 
85     private boolean isProperDigitCount( double value)
86     {
87         return ( java.lang.Math.floor( value * 10 ) == value * 10 );
88     }
89 }
90