1 /*

     2  * Copyright (c) 2001, 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 4461299

    26  * @summary Verify that serialization functions properly if

    27  *          ObjectInputStream.readClassDescriptor() returns a local class

    28  *          descriptor for which the serialVersionUID has not yet been

    29  *          calculated.

    30  */

    31 

    32 import java.io.*;

    33 import java.util.*;

    34 

    35 class LoopbackOutputStream extends ObjectOutputStream {

    36     LinkedList descs;

    37 

    38     LoopbackOutputStream(OutputStream out, LinkedList descs)

    39         throws IOException

    40     {

    41         super(out);

    42         this.descs = descs;

    43     }

    44 

    45     protected void writeClassDescriptor(ObjectStreamClass desc)

    46         throws IOException

    47     {

    48         descs.add(desc);

    49     }

    50 }

    51 

    52 class LoopbackInputStream extends ObjectInputStream {

    53     LinkedList descs;

    54 

    55     LoopbackInputStream(InputStream in, LinkedList descs) throws IOException {

    56         super(in);

    57         this.descs = descs;

    58     }

    59 

    60     protected ObjectStreamClass readClassDescriptor()

    61         throws IOException, ClassNotFoundException

    62     {

    63         return (ObjectStreamClass) descs.removeFirst();

    64     }

    65 }

    66 

    67 public class Loopback implements Serializable {

    68     String str;

    69 

    70     Loopback(String str) {

    71         this.str = str;

    72     }

    73 

    74     public static void main(String[] args) throws Exception {

    75         Loopback lb = new Loopback("foo");

    76         LinkedList descs = new LinkedList();

    77         ByteArrayOutputStream bout = new ByteArrayOutputStream();

    78         LoopbackOutputStream lout = new LoopbackOutputStream(bout, descs);

    79         lout.writeObject(lb);

    80         lout.close();

    81 

    82         LoopbackInputStream lin = new LoopbackInputStream(

    83             new ByteArrayInputStream(bout.toByteArray()), descs);

    84         Loopback lbcopy = (Loopback) lin.readObject();

    85         if (!lb.str.equals(lbcopy.str)) {

    86             throw new Error();

    87         }

    88     }

    89 }