001 /* ServerCloneException.java -- a UnicastRemoteObject could not be cloned
002 Copyright (c) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package java.rmi.server;
039
040 /**
041 * Thrown if a remote exception occurs during the cloning process of a
042 * <code>UnicastRemoteObject</code>.
043 *
044 * @author unknown
045 * @see UnicastRemoteObject#clone()
046 * @since 1.1
047 * @status updated to 1.4
048 */
049 public class ServerCloneException extends CloneNotSupportedException
050 {
051 /**
052 * Compatible with JDK 1.1+.
053 */
054 private static final long serialVersionUID = 6617456357664815945L;
055
056 /**
057 * The cause of this exception. This pre-dates the exception chaining
058 * of Throwable; and although you can change this field, you are wiser
059 * to leave it alone.
060 *
061 * @serial the exception cause
062 */
063 public Exception detail;
064
065 /**
066 * Create an exception with a message.
067 *
068 * @param s the message
069 */
070 public ServerCloneException(String s)
071 {
072 this(s, null);
073 }
074
075 /**
076 * Create an exception with a message and a cause.
077 *
078 * @param s the message
079 * @param e the cause
080 */
081 public ServerCloneException(String s, Exception e)
082 {
083 super(s);
084 initCause(e);
085 detail = e;
086 }
087
088 /**
089 * This method returns a message indicating what went wrong, in this
090 * format:
091 * <code>super.getMessage() + (detail == null ? ""
092 * : "; nested exception is:\n\t" + detail)</code>.
093 *
094 * @return the chained message
095 */
096 public String getMessage()
097 {
098 if (detail == this || detail == null)
099 return super.getMessage();
100 return super.getMessage() + "; nested exception is:\n\t" + detail;
101 }
102
103 /**
104 * Returns the cause of this exception. Note that this may not be the
105 * original cause, thanks to the <code>detail</code> field being public
106 * and non-final (yuck). However, to avoid violating the contract of
107 * Throwable.getCause(), this returns null if <code>detail == this</code>,
108 * as no exception can be its own cause.
109 *
110 * @return the cause
111 * @since 1.4
112 */
113 public Throwable getCause()
114 {
115 return detail == this ? null : detail;
116 }
117 }