1 /*
   2  * Copyright (c) 1996, 2005, Oracle and/or its affiliates. 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.io;
  27 
  28 /**
  29  * Signals that one of the ObjectStreamExceptions was thrown during a
  30  * write operation.  Thrown during a read operation when one of the
  31  * ObjectStreamExceptions was thrown during a write operation.  The
  32  * exception that terminated the write can be found in the detail
  33  * field. The stream is reset to it's initial state and all references
  34  * to objects already deserialized are discarded.
  35  *
  36  * <p>As of release 1.4, this exception has been retrofitted to conform to
  37  * the general purpose exception-chaining mechanism.  The "exception causing
  38  * the abort" that is provided at construction time and
  39  * accessed via the public {@link #detail} field is now known as the
  40  * <i>cause</i>, and may be accessed via the {@link Throwable#getCause()}
  41  * method, as well as the aforementioned "legacy field."
  42  *
  43  * @author  unascribed
  44  * @since   1.1
  45  */
  46 public class WriteAbortedException extends ObjectStreamException {
  47     private static final long serialVersionUID = -3326426625597282442L;
  48 
  49     /**
  50      * Exception that was caught while writing the ObjectStream.
  51      *
  52      * <p>This field predates the general-purpose exception chaining facility.
  53      * The {@link Throwable#getCause()} method is now the preferred means of
  54      * obtaining this information.
  55      *
  56      * @serial
  57      */
  58     public Exception detail;
  59 
  60     /**
  61      * Constructs a WriteAbortedException with a string describing
  62      * the exception and the exception causing the abort.
  63      * @param s   String describing the exception.
  64      * @param ex  Exception causing the abort.
  65      */
  66     public WriteAbortedException(String s, Exception ex) {
  67         super(s);
  68         initCause(null);  // Disallow subsequent initCause
  69         detail = ex;
  70     }
  71 
  72     /**
  73      * Produce the message and include the message from the nested
  74      * exception, if there is one.
  75      */
  76     public String getMessage() {
  77         if (detail == null)
  78             return super.getMessage();
  79         else
  80             return super.getMessage() + "; " + detail.toString();
  81     }
  82 
  83     /**
  84      * Returns the exception that terminated the operation (the <i>cause</i>).
  85      *
  86      * @return  the exception that terminated the operation (the <i>cause</i>),
  87      *          which may be null.
  88      * @since   1.4
  89      */
  90     public Throwable getCause() {
  91         return detail;
  92     }
  93 }