001 /*
002 * Copyright 1996-2004 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package java.lang.reflect;
027
028 /**
029 * InvocationTargetException is a checked exception that wraps
030 * an exception thrown by an invoked method or constructor.
031 *
032 * <p>As of release 1.4, this exception has been retrofitted to conform to
033 * the general purpose exception-chaining mechanism. The "target exception"
034 * that is provided at construction time and accessed via the
035 * {@link #getTargetException()} method is now known as the <i>cause</i>,
036 * and may be accessed via the {@link Throwable#getCause()} method,
037 * as well as the aforementioned "legacy method."
038 *
039 * @see Method
040 * @see Constructor
041 */
042 public class InvocationTargetException extends Exception {
043 /**
044 * Use serialVersionUID from JDK 1.1.X for interoperability
045 */
046 private static final long serialVersionUID = 4085088731926701167L;
047
048 /**
049 * This field holds the target if the
050 * InvocationTargetException(Throwable target) constructor was
051 * used to instantiate the object
052 *
053 * @serial
054 *
055 */
056 private Throwable target;
057
058 /**
059 * Constructs an {@code InvocationTargetException} with
060 * {@code null} as the target exception.
061 */
062 protected InvocationTargetException() {
063 super ((Throwable) null); // Disallow initCause
064 }
065
066 /**
067 * Constructs a InvocationTargetException with a target exception.
068 *
069 * @param target the target exception
070 */
071 public InvocationTargetException(Throwable target) {
072 super ((Throwable) null); // Disallow initCause
073 this .target = target;
074 }
075
076 /**
077 * Constructs a InvocationTargetException with a target exception
078 * and a detail message.
079 *
080 * @param target the target exception
081 * @param s the detail message
082 */
083 public InvocationTargetException(Throwable target, String s) {
084 super (s, null); // Disallow initCause
085 this .target = target;
086 }
087
088 /**
089 * Get the thrown target exception.
090 *
091 * <p>This method predates the general-purpose exception chaining facility.
092 * The {@link Throwable#getCause()} method is now the preferred means of
093 * obtaining this information.
094 *
095 * @return the thrown target exception (cause of this exception).
096 */
097 public Throwable getTargetException() {
098 return target;
099 }
100
101 /**
102 * Returns the cause of this exception (the thrown target exception,
103 * which may be {@code null}).
104 *
105 * @return the cause of this exception.
106 * @since 1.4
107 */
108 public Throwable getCause() {
109 return target;
110 }
111 }
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