1 /*

     2  * Copyright 2000 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 4311991

    26  * @summary Test ObjectOutputStream.writeUnshared/readUnshared functionality.

    27  */

    28 

    29 import java.io.*;

    30 

    31 class Bar implements Serializable {

    32     private static final long serialVersionUID = 0L;

    33     private static final ObjectStreamField[] serialPersistentFields =

    34         new ObjectStreamField[] {

    35             new ObjectStreamField("obj", Object.class, true)

    36         };

    37     Object obj;

    38 

    39     Bar(Object obj) {

    40         this.obj = obj;

    41     }

    42 }

    43 

    44 public class Read {

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

    46         String str = "foo";

    47         ByteArrayOutputStream bout = new ByteArrayOutputStream();

    48         ObjectOutputStream oout = new ObjectOutputStream(bout);

    49 

    50         oout.writeObject(str);

    51         oout.writeObject(str);

    52         oout.close();

    53 

    54         byte[] buf = bout.toByteArray();

    55         ByteArrayInputStream bin = new ByteArrayInputStream(buf);

    56         ObjectInputStream oin = new ObjectInputStream(bin);

    57         oin.readUnshared();

    58         try {

    59             oin.readObject();

    60             throw new Error();

    61         } catch (ObjectStreamException ex) {

    62         }

    63 

    64         bin = new ByteArrayInputStream(buf);

    65         oin = new ObjectInputStream(bin);

    66         oin.readUnshared();

    67         try {

    68             oin.readUnshared();

    69             throw new Error();

    70         } catch (ObjectStreamException ex) {

    71         }

    72 

    73         bin = new ByteArrayInputStream(buf);

    74         oin = new ObjectInputStream(bin);

    75         oin.readObject();

    76         try {

    77             oin.readUnshared();

    78             throw new Error();

    79         } catch (ObjectStreamException ex) {

    80         }

    81 

    82         // read in objects written by Write.main()

    83         oin = new ObjectInputStream(new FileInputStream("tmp.ser"));

    84         oin.readObject();

    85         try {

    86             oin.readObject();

    87             throw new Error();

    88         } catch (ObjectStreamException ex) {

    89         }

    90 

    91         oin = new ObjectInputStream(new FileInputStream("tmp.ser"));

    92         oin.readObject();

    93         try {

    94             oin.readUnshared();

    95             throw new Error();

    96         } catch (ObjectStreamException ex) {

    97         }

    98     }

    99 }