1 /**
2 * This file is part of the equanda project.
3 *
4 * The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
7 *
8 * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
9 * ANY KIND, either express or implied. See the License for the specific language governing rights and
10 * limitations under the License.
11 *
12 * Alternatively, the contents of this file may be used under the terms of
13 * either the GNU General Public License Version 2 or later (the "GPL"), or
14 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
15 * in which case the provisions of the GPL or the LGPL are applicable instead
16 * of those above. If you wish to allow use of your version of this file only
17 * under the terms of either the GPL or the LGPL, and not to allow others to
18 * use your version of this file under the terms of the MPL, indicate your
19 * decision by deleting the provisions above and replace them with the notice
20 * and other provisions required by the GPL or the LGPL. If you do not delete
21 * the provisions above, a recipient may use your version of this file under
22 * the terms of any one of the MPL, the GPL or the LGPL.
23 */
24
25 package org.equanda.tapestry5.translators;
26
27 import org.apache.tapestry5.Translator;
28 import org.apache.tapestry5.ValidationException;
29 import org.apache.tapestry5.ioc.Messages;
30
31 /**
32 * Tapestry translator for double values, assures both point or comma can be used as decimal separator.
33 *
34 * @author <a href="mailto:joachim@progs.be">Joachim Van der Auwera</a>
35 */
36 public class DoubleTranslator
37 implements Translator<Double>
38 {
39 /**
40 * Parses blank values to null, otherwise parses the client value to a double
41 *
42 * @throws ValidationException if the clientValue can not be parsed
43 */
44 public Double parseClient( String clientValue, Messages messages )
45 throws ValidationException
46 {
47 if ( clientValue == null || clientValue.length() == 0 ) return null;
48 clientValue = clientValue.trim();
49 if ( clientValue.length() == 0 ) return null;
50
51 try
52 {
53 return new Double( clientValue.replace( ',', '.' ).trim() );
54 }
55 catch ( NumberFormatException ex )
56 {
57 throw new ValidationException( messages.format( "number-format-exception", clientValue ) );
58 }
59 }
60
61 /**
62 * Converts null to the blank string, non-null to a string representation.
63 */
64 public String toClient( Double value )
65 {
66 return value == null ? "" : value.toString();
67 }
68
69 public Class<Double> getType() { return Double.class; }
70 }