1 /*

     2  * Copyright (c) 2005, 2015, 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 /*

    25  * @test

    26  * @bug 6783290

    27  * @summary Test correct reading of an empty Descriptor.

    28  * @author Jaroslav Bachorik

    29  *

    30  * @run clean SerializationTest1

    31  * @run build SerializationTest1

    32  * @run main SerializationTest1

    33  */

    34 

    35 import java.io.*;

    36 import javax.management.*;

    37 

    38 public class SerializationTest1 {

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

    40         MBeanInfo mi1 = new MBeanInfo("",

    41                                       "",

    42                                       new MBeanAttributeInfo[]{},

    43                                       new MBeanConstructorInfo[]{},

    44                                       new MBeanOperationInfo[]{},

    45                                       new MBeanNotificationInfo[]{},

    46                                       ImmutableDescriptor.EMPTY_DESCRIPTOR);

    47 

    48         test(mi1);

    49 

    50         MBeanFeatureInfo mfi2 = new MBeanFeatureInfo("",

    51                                                      "",

    52                                                      ImmutableDescriptor.EMPTY_DESCRIPTOR);

    53 

    54         test(mfi2);

    55     }

    56 

    57     public static void test(Object obj) throws Exception {

    58         ByteArrayOutputStream baos = new ByteArrayOutputStream();

    59         ObjectOutputStream oos = new ObjectOutputStream(baos);

    60         oos.writeObject(obj);

    61 

    62         final boolean[] failed = new boolean[]{false};

    63         ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    64         final ObjectInputStream ois = new ObjectInputStream(bais) {

    65             protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {

    66                 System.out.println("*** " + desc.getName());

    67                 if (desc.getName().equals("[Ljava.lang.Object;")) { // javax.management.Descriptor fields

    68                     Thread.dumpStack();

    69                     for(StackTraceElement e : Thread.currentThread().getStackTrace()) { // checking for the deserialization location

    70                         if (e.getMethodName().equals("skipCustomData")) { // indicates the presence of unread values from the custom object serialization

    71                             failed[0] = true;

    72                         }

    73                     }

    74                 }

    75                 return super.resolveClass(desc); //To change body of generated methods, choose Tools | Templates.

    76             }

    77         };

    78         Object newObj = ois.readObject();

    79 

    80         if (failed[0]) {

    81             throw new RuntimeException("Zero-length descriptor not read back");

    82         }

    83     }

    84 }