1 /*
2 * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.lang;
27
28 /**
29 * Thrown to indicate that an assertion has failed.
30 *
31 * <p>The seven one-argument public constructors provided by this
32 * class ensure that the assertion error returned by the invocation:
33 * <pre>
34 * new AssertionError(<i>expression</i>)
35 * </pre>
36 * has as its detail message the <i>string conversion</i> of
37 * <i>expression</i> (as defined in <a
38 * href="http://java.sun.com/docs/books/jls/second_edition/html/j.title.doc.html">
39 * <i>The Java Language Specification, Second Edition</i></a>,
40 * <a href="http://java.sun.com/docs/books/jls/second_edition/html/expressions.doc.html#40220">
41 * Section 15.18.1.1</a>), regardless of the type of <i>expression</i>.
42 *
43 * @since 1.4
44 */
45 public class AssertionError extends Error {
46 /**
47 * Constructs an AssertionError with no detail message.
48 */
49 public AssertionError() {
50 }
51
52 /**
53 * This internal constructor does no processing on its string argument,
54 * even if it is a null reference. The public constructors will
55 * never call this constructor with a null argument.
56 */
57 private AssertionError(String detailMessage) {
58 super(detailMessage);
59 }
60
61 /**
62 * Constructs an AssertionError with its detail message derived
63 * from the specified object, which is converted to a string as
64 * defined in <i>The Java Language Specification, Second
65 * Edition</i>, Section 15.18.1.1.
66 *<p>
67 * If the specified object is an instance of <tt>Throwable</tt>, it
68 * becomes the <i>cause</i> of the newly constructed assertion error.
69 *
70 * @param detailMessage value to be used in constructing detail message
71 * @see Throwable#getCause()
72 */
73 public AssertionError(Object detailMessage) {
74 this("" + detailMessage);
75 if (detailMessage instanceof Throwable)
76 initCause((Throwable) detailMessage);
77 }
78
79 /**
80 * Constructs an AssertionError with its detail message derived
81 * from the specified <code>boolean</code>, which is converted to
82 * a string as defined in <i>The Java Language Specification,
83 * Second Edition</i>, Section 15.18.1.1.
84 *
85 * @param detailMessage value to be used in constructing detail message
86 */
87 public AssertionError(boolean detailMessage) {
88 this("" + detailMessage);
89 }
90
91 /**
92 * Constructs an AssertionError with its detail message derived
93 * from the specified <code>char</code>, which is converted to a
94 * string as defined in <i>The Java Language Specification, Second
95 * Edition</i>, Section 15.18.1.1.
96 *
97 * @param detailMessage value to be used in constructing detail message
98 */
99 public AssertionError(char detailMessage) {
100 this("" + detailMessage);
101 }
102
103 /**
104 * Constructs an AssertionError with its detail message derived
105 * from the specified <code>int</code>, which is converted to a
106 * string as defined in <i>The Java Language Specification, Second
107 * Edition</i>, Section 15.18.1.1.
108 *
109 * @param detailMessage value to be used in constructing detail message
110 */
111 public AssertionError(int detailMessage) {
112 this("" + detailMessage);
113 }
114
115 /**
116 * Constructs an AssertionError with its detail message derived
117 * from the specified <code>long</code>, which is converted to a
118 * string as defined in <i>The Java Language Specification, Second
119 * Edition</i>, Section 15.18.1.1.
120 *
121 * @param detailMessage value to be used in constructing detail message
122 */
123 public AssertionError(long detailMessage) {
124 this("" + detailMessage);
125 }
126
127 /**
128 * Constructs an AssertionError with its detail message derived
129 * from the specified <code>float</code>, which is converted to a
130 * string as defined in <i>The Java Language Specification, Second
131 * Edition</i>, Section 15.18.1.1.
132 *
133 * @param detailMessage value to be used in constructing detail message
134 */
135 public AssertionError(float detailMessage) {
136 this("" + detailMessage);
137 }
138
139 /**
140 * Constructs an AssertionError with its detail message derived
141 * from the specified <code>double</code>, which is converted to a
142 * string as defined in <i>The Java Language Specification, Second
143 * Edition</i>, Section 15.18.1.1.
144 *
145 * @param detailMessage value to be used in constructing detail message
146 */
147 public AssertionError(double detailMessage) {
148 this("" + detailMessage);
149 }
150 }
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