1 /*

     2  * Copyright (c) 2014, 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.

     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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /* @test

    25  * @bug 8039396

    26  * @run main UnresolvableObjectStreamClass serialize

    27  * @clean MySerializable

    28  * @run main UnresolvableObjectStreamClass deserialize

    29  *

    30  * @summary NPE when writing a class descriptor object to a custom

    31  *          ObjectOutputStream

    32  */

    33 

    34 import java.io.*;

    35 

    36 public class UnresolvableObjectStreamClass {

    37     public static void main(String[] args) throws Throwable {

    38         if (args.length > 0 && args[0].equals("serialize")) {

    39             try (FileOutputStream fos = new FileOutputStream("temp1.ser");

    40                  ObjectOutputStream oos = new ObjectOutputStream(fos)) {

    41                 ObjectStreamClass osc =

    42                          ObjectStreamClass.lookup(MySerializable.class);

    43                 oos.writeObject(osc);

    44             }

    45         } else if (args.length > 0 && args[0].equals("deserialize")) {

    46             try (FileInputStream fis = new FileInputStream("temp1.ser");

    47                  ObjectInputStream ois = new ObjectInputStream(fis);

    48                  FileOutputStream fos = new FileOutputStream("temp2.ser");

    49                  ObjectOutputStream oos = new ObjectOutputStream(fos) {

    50                          /*must be subclassed*/}) {

    51                 ObjectStreamClass osc = (ObjectStreamClass)ois.readObject();

    52                 // serialize it again

    53                 try {

    54                     oos.writeObject(osc);

    55                 } catch (NullPointerException e) {

    56                     throw new RuntimeException("Failed to write" +

    57                             " unresolvable ObjectStreamClass", e);

    58                 }

    59             }

    60         } else {

    61             throw new RuntimeException("The command line option must be" +

    62                                        " one of: serialize or deserialize");

    63         }

    64     }

    65 }

    66 

    67 class MySerializable implements Serializable {

    68 }