1 /*
   2  * Copyright (c) 2002, 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 4764280
  26  *
  27  * @clean Setup Test A B
  28  * @compile Setup.java
  29  * @run main Setup
  30  * @clean Setup A B
  31  * @compile Test.java
  32  * @run main Test
  33  *
  34  * @summary Verify that if a serializable class declares multiple
  35  *          serialPersistentFields that share the same name, calling
  36  *          ObjectStreamClass.lookup() for that class will not result in an
  37  *          InternalError, and that attempts at default serialization or
  38  *          deserialization of such a class will result in
  39  *          InvalidClassExceptions.
  40  */
  41 
  42 import java.io.*;
  43 
  44 class A implements Serializable {
  45     private static final long serialVersionUID = 0L;
  46     private static final ObjectStreamField[] serialPersistentFields = {
  47         new ObjectStreamField("i", int.class),
  48         new ObjectStreamField("i", int.class)
  49     };
  50     int i;
  51 }
  52 
  53 class B implements Serializable {
  54     private static final long serialVersionUID = 0L;
  55     private static final ObjectStreamField[] serialPersistentFields = {
  56         new ObjectStreamField("i", int.class),
  57         new ObjectStreamField("i", String.class)
  58     };
  59     int i;
  60 }
  61 
  62 public class Test {
  63     public static void main(String[] args) throws Exception {
  64 
  65         ObjectStreamClass.lookup(A.class);
  66         ObjectStreamClass.lookup(B.class);
  67 
  68         ObjectOutputStream oout =
  69             new ObjectOutputStream(new ByteArrayOutputStream());
  70         try {
  71             oout.writeObject(new A());
  72             throw new Error(
  73                 "write of A should fail with InvalidClassException");
  74         } catch (InvalidClassException e) {
  75         }
  76 
  77         oout = new ObjectOutputStream(new ByteArrayOutputStream());
  78         try {
  79             oout.writeObject(new B());
  80             throw new Error(
  81                 "write of B should fail with InvalidClassException");
  82         } catch (InvalidClassException e) {
  83         }
  84 
  85         FileInputStream in = new FileInputStream("a.ser");
  86         try {
  87             ObjectInputStream oin = new ObjectInputStream(in);
  88             oin.readObject();
  89             throw new Error(
  90                 "read of A should fail with InvalidClassException");
  91         } catch (InvalidClassException e) {
  92         } finally {
  93             in.close();
  94         }
  95 
  96         in = new FileInputStream("b.ser");
  97         try {
  98             ObjectInputStream oin = new ObjectInputStream(in);
  99             oin.readObject();
 100             throw new Error(
 101                 "read of B should fail with InvalidClassException");
 102         } catch (InvalidClassException e) {
 103         } finally {
 104             in.close();
 105         }
 106     }
 107 }