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 during {@link Column} unification if there is a contradiction
50 * between two of the possible {@link DefinitionSource}s.
51 *
52 * @author WilliamC AT paneris.org
53 */
54 public class TypeDefinitionMismatchException extends SeriousPoemException {
55 private static final long serialVersionUID = 1L;
56
57 /**
58 * Column in which problem occurred.
59 */
60 public Column<?> column;
61 /**
62 * Type we are trying to assign.
63 */
64 public PoemType<?> newType;
65 /**
66 * Where the new type came from.
67 */
68 public DefinitionSource newTypeSource;
69
70 /**
71 * Constructor.
72 */
73 public TypeDefinitionMismatchException(Column<?> column,
74 PoemType<?> newType,
75 DefinitionSource newTypeSource) {
76 this.column = column;
77 this.newType = newType;
78 this.newTypeSource = newTypeSource;
79 }
80
81 /**
82 * @return The detail message
83 * @see java.lang.Throwable#getMessage()
84 */
85 public String getMessage() {
86 return
87 "Column " + column + " has its type " +
88 "(" + column.getType().getClass() + ") [" + column.getType() +
89 "] overridden incompatibly in " + newTypeSource +
90 ": (" + newType.getClass() + ") [" + newType + "]";
91 }
92 }