1 /*
2  * Copyright (c) 1996, 2006, 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
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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.
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22  * or visit www.oracle.com if you need additional information or have any
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24  */
25 
26 package java.io;
27 
28 /**
29  * Thrown when the Serialization runtime detects one of the following
30  * problems with a Class.
31  * <UL>
32  * <LI> The serial version of the class does not match that of the class
33  *      descriptor read from the stream
34  * <LI> The class contains unknown datatypes
35  * <LI> The class does not have an accessible no-arg constructor
36  * </UL>
37  *
38  * @author  unascribed
39  * @since   JDK1.1
40  */
41 public class InvalidClassException extends ObjectStreamException {
42 
43     private static final long serialVersionUID = -4333316296251054416L;
44 
45     /**
46      * Name of the invalid class.
47      *
48      * @serial Name of the invalid class.
49      */
50     public String classname;
51 
52     /**
53      * Report an InvalidClassException for the reason specified.
54      *
55      * @param reason  String describing the reason for the exception.
56      */
InvalidClassException(String reason)57     public InvalidClassException(String reason) {
58         super(reason);
59     }
60 
61     /**
62      * Constructs an InvalidClassException object.
63      *
64      * @param cname   a String naming the invalid class.
65      * @param reason  a String describing the reason for the exception.
66      */
InvalidClassException(String cname, String reason)67     public InvalidClassException(String cname, String reason) {
68         super(reason);
69         classname = cname;
70     }
71 
72     /**
73      * Produce the message and include the classname, if present.
74      */
getMessage()75     public String getMessage() {
76         if (classname == null)
77             return super.getMessage();
78         else
79             return classname + "; " + super.getMessage();
80     }
81 }
82