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@paneris.org>
42 * http://paneris.org/~williamc
43 * Obrechtstraat 114, 2517VX Den Haag, The Netherlands
44 */
45
46 package org.melati.poem;
47
48 /**
49 * Thrown when the type of an object isn't the one expected.
50 *
51 * @author WilliamC AT paneris.org
52 *
53 */
54 public class TypeMismatchPoemException extends AppBugPoemException {
55
56
57 /** The value we are trying to assign. */
58 public Object value;
59 /** The type of the destination.*/
60 public PoemType<?> type;
61
62 /** Constructor. */
63 public TypeMismatchPoemException(Object value, PoemType<?> type) {
64 this.value = value;
65 this.type = type;
66 }
67
68 /**
69 * @return The detail message
70 * @see java.lang.Throwable#getMessage()
71 */
72 public String getMessage() {
73 String s;
74 try {
75 s = String.valueOf(value);
76 if (s.length() >= 100) s = "<long>";
77 } catch (Exception e) {
78 s = "<error>";
79 }
80 return
81 "An unexpected type mismatch happened\n" +
82 "Expected: " + type + "\n" +
83 "Got: " + (value == null ? "null" : value.getClass().getName()) + "\n" +
84 "Value: " + s;
85 }
86 }