1 /***
2 * Copyright (C) 2006 Philipp Mpalampanis
3 *
4 * License: MPL 1.1/GPL 2.0/LGPL 2.1
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 1.1 (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 * http://www.mozilla.org/MPL/
10 *
11 * Software distributed under the License is distributed on an "AS IS" basis,
12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 * for the specific language governing rights and limitations under the
14 * License.
15 *
16 * Alternatively, the contents of this file may be used under the terms of
17 * either the GNU General Public License Version 2 or later (the "GPL"), or
18 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
19 * in which case the provisions of the GPL or the LGPL are applicable instead
20 * of those above. If you wish to allow use of your version of this file only
21 * under the terms of either the GPL or the LGPL, and not to allow others to
22 * use your version of this file under the terms of the MPL, indicate your
23 * decision by deleting the provisions above and replace them with the notice
24 * and other provisions required by the GPL or the LGPL. If you do not delete
25 * the provisions above, a recipient may use your version of this file under
26 * the terms of any one of the MPL, the GPL or the LGPL.
27 */
28
29 package net.sf.echobinding.validation;
30
31 import java.text.*;
32
33
34 /***
35 * A number validator for validating the format of numbers.
36 *
37 */
38 public class NumberValidator implements Validator
39 {
40 private NumberFormat _format;
41
42 /***
43 * Creates a number validator.
44 *
45 * @param pattern - the number pattern to use
46 */
47 public NumberValidator(String pattern)
48 {
49 this._format = new DecimalFormat(pattern);
50 }
51
52 /***
53 * Validates the input against the number format.
54 *
55 * @param input - the user input
56 */
57 public ValidationReport validate(Object bean, Object input) {
58 try
59 {
60 _format.parse(input.toString());
61 }
62 catch (ParseException e)
63 {
64 return new ValidationReport(false, e.getMessage());
65 }
66
67 return new ValidationReport(true, null);
68
69 }
70
71 }