1 /*

     2  * Copyright 1997-2007 Sun Microsystems, Inc.  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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  *  @bug 4070080

    26  *

    27  *  @build WriteAddedSuperClass ReadAddedSuperClass

    28  *  @run main ReadAddedSuperClass

    29  *  @summary Test reading an evolved class serialization into the original class

    30  *           version. Class evolved by adding a superclass.

    31  *           This is a compatible class evolution.

    32  *

    33  *  Part a of test serializes an instance of an evolved class to a serialization stream.

    34  *  Part b of test deserializes the serialization stream into an instance of

    35  *  the original class.

    36  *

    37  *  Description of failure:

    38  *

    39  *  If you delete AddedSuperClass.class before running this test,

    40  *  both JDK 1.1.x and 1.2 result in ClassNotFoundException for class

    41  *  AddedSuperClass.  If the .class file is not deleted, 1.2 does not

    42  *  fail. However, JDK 1.1.4 core dumps dereferencing a null class handle

    43  *  in the native method for inputClassDescriptor.

    44  */

    45 

    46 import java.io.*;

    47 

    48 class A implements Serializable {

    49     // Version 1.0 of class A.

    50     private static final long serialVersionUID = 1L;

    51 }

    52 

    53 public class ReadAddedSuperClass {

    54     public static void main(String args[]) throws IOException, ClassNotFoundException {

    55         File f = new File("tmp.ser");

    56         ObjectInput in =

    57             new ObjectInputStream(new FileInputStream(f));

    58         A a = (A)in.readObject();

    59         in.close();

    60     }

    61 }