1 /*
2 * $Header: /home/cvs/jakarta-commons/betwixt/src/java/org/apache/commons/betwixt/io/CyclicReferenceException.java,v 1.2 2002/06/12 21:40:06 rdonkin Exp $
3 * $Revision: 1.2 $
4 * $Date: 2002/06/12 21:40:06 $
5 *
6 * ====================================================================
7 *
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution, if
26 * any, must include the following acknowlegement:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowlegement may appear in the software itself,
30 * if and wherever such third-party acknowlegements normally appear.
31 *
32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
33 * Foundation" must not be used to endorse or promote products derived
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35 * permission, please contact apache@apache.org.
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37 * 5. Products derived from this software may not be called "Apache"
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40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
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58 * <http://www.apache.org/>.
59 *
60 * $Id: CyclicReferenceException.java,v 1.2 2002/06/12 21:40:06 rdonkin Exp $
61 */
62 package org.apache.commons.betwixt.io;
63
64 /***
65 * <p>Thrown when bean evaluation finds a cycle reference.</p>
66 *
67 * <p>There are two possible behaviours that <code>Betwixt</code> adopts when
68 * a cycle in the object graph is encountered.
69 *
70 * <p>If <code>ID</code> attributes are being generated,
71 * then the recursion will stop and the <code>IDREF</code> attribute will be
72 * written.
73 * In this case, <em>no exception will be thrown</em>.</p>
74 *
75 * <p>If <code>ID</code> are <strong>not</strong> being generated,
76 * then this exception will be thrown.</p>
77 *
78 * @author <a href="mailto:rdonkin@apache.org">Robert Burrell Donkin</a>
79 * @version $Revision: 1.2 $
80 */
81 public class CyclicReferenceException extends RuntimeException {
82
83 /*** Message used with empty constructor */
84 private static final String DEFAULT_MESSAGE
85 = "Bean graph contains a cyclic reference";
86
87 /*** Construct exception with default message.
88 */
89 public CyclicReferenceException() {
90 super(DEFAULT_MESSAGE);
91 }
92
93 /*** Construct exception with given message
94 */
95 public CyclicReferenceException(String message) {
96 super(message);
97 }
98 }
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