1 /* InvalidClassException.java -- deserializing a class failed 2 Copyright (C) 1998, 2002 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package java.io; 40 41 /** 42 * This exception is thrown when there is some sort of problem with a 43 * class during a serialization operation. This could be:<br><ul> 44 * <li>the serial version of the class doesn't match</li> 45 * <li>the class contains unknown datatypes</li> 46 * <li>the class does not have an accessible no-arg constructor</li> 47 * </ul>. 48 * 49 * <p>The field <code>classname</code> will contain the name of the 50 * class that caused the problem if known. The getMessage() method 51 * for this exception will always include the name of that class 52 * if known. 53 * 54 * @author Aaron M. Renn (arenn@urbanophile.com) 55 * @since 1.1 56 * @status updated to 1.4 57 */ 58 public class InvalidClassException extends ObjectStreamException 59 { 60 /** 61 * Compatible with JDK 1.1+. 62 */ 63 private static final long serialVersionUID = -4333316296251054416L; 64 65 /** 66 * The name of the class which encountered the error. 67 * 68 * @serial the classname causing the error 69 */ 70 public String classname; 71 72 /** 73 * Create an exception with a descriptive error message, but a null 74 * classname. 75 * 76 * @param message the descriptive error message 77 */ InvalidClassException(String message)78 public InvalidClassException(String message) 79 { 80 super(message); 81 } 82 83 /** 84 * Create an exception with a descriptive error message, and the name of 85 * the class that caused the problem. 86 * 87 * @param classname the name of the faulty class 88 * @param message the descriptive error message 89 */ InvalidClassException(String classname, String message)90 public InvalidClassException(String classname, String message) 91 { 92 super(message); 93 this.classname = classname; 94 } 95 96 /** 97 * Returns the descriptive error message for this exception. It will 98 * include the class name that caused the problem if known, in the format: 99 * <code>[classname][; ][super.getMessage()]</code>. 100 * 101 * @return A descriptive error message, may be null 102 */ getMessage()103 public String getMessage() 104 { 105 String msg = super.getMessage(); 106 if (msg == null) 107 return classname; 108 return (classname == null ? "" : classname + "; ") + msg; 109 } 110 } 111 112