1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2000 William Chesters
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * William Chesters <williamc At paneris.org>
42 * http://paneris.org/~williamc
43 * Obrechtstraat 114, 2517VX Den Haag, The Netherlands
44 */
45
46 package org.melati.template;
47
48 import java.sql.Date;
49 import java.text.SimpleDateFormat;
50 import java.text.ParsePosition;
51
52 import org.melati.poem.Field;
53 import org.melati.servlet.Form;
54
55 /**
56 * A SimpleDateAdaptor is used to format a date field into
57 * a dd/mm/yyyy format for display.
58 *
59 * It also adapts the input (given in dd/mm/yyyy or yyyyMMdd)
60 * back to a java.sql.Date.
61 */
62
63 public class SimpleDateAdaptor implements TempletAdaptor {
64
65 /** The instance. */
66 public static final SimpleDateAdaptor it = new SimpleDateAdaptor();
67
68 private static SimpleDateFormat dateFormatter1 =
69 new SimpleDateFormat("dd/MM/yyyy");
70
71 // allow other forms of date - this one yyyyMMdd
72
73 private static SimpleDateFormat dateFormatter2 =
74 new SimpleDateFormat("yyyyMMdd");
75
76 @Override
77 public Object rawFrom(ServletTemplateContext context, String fieldName) {
78 String value = Form.getFieldNulled(context,fieldName);
79 if (value == null) return null;
80 java.util.Date date = dateFormatter1.parse(value, new ParsePosition(0));
81 // give it another go using a different format
82 if (date == null)
83 date = dateFormatter2.parse(value, new ParsePosition(0));
84 return new Date(date.getTime());
85 }
86
87 /**
88 * @param dateField the input Field
89 * @return the rendered String
90 */
91 public String rendered(Field<Date> dateField) {
92 return dateField.getRaw() == null ?
93 "" :
94 dateFormatter1.format((java.util.Date)dateField.getRaw());
95 }
96 }