1 /*
   2  * Copyright (c) 1997, 1998, 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  * @summary Verify that ClassCastException is thrown when deserializing
  26  *          an object and one of its object fields is  incompatibly replaced
  27  *          by either replaceObject/resolveObject.
  28  *
  29  */
  30 import java.io.*;
  31 
  32 class A implements Serializable {}
  33 
  34 class B implements Serializable {}
  35 
  36 class Container implements Serializable {
  37     A a = new A();
  38 }
  39 
  40 class ReplacerObjectOutputStream extends ObjectOutputStream {
  41     static B b = new B();
  42   public ReplacerObjectOutputStream(OutputStream out) throws IOException {
  43     super(out);
  44     enableReplaceObject(true);
  45   }
  46 
  47   protected Object replaceObject(Object obj) throws IOException {
  48       if(obj instanceof A) {
  49           System.err.println("replaceObject(" + obj.toString() + ") with " +
  50                              b.toString());
  51           return b;
  52       } else return obj;
  53   }
  54 }
  55 
  56 public class BadSubstByReplace {
  57     public static void main(String args[]) throws IOException, ClassNotFoundException {
  58         Container c = new Container();
  59         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  60         ReplacerObjectOutputStream out =   new ReplacerObjectOutputStream(baos);
  61         out.writeObject(c);
  62         out.close();
  63         ObjectInputStream in =
  64             new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()));
  65         try {
  66             c = (Container)in.readObject(); // throws IllegalArgumentException.
  67             throw new Error("Should have thrown ClassCastException");
  68         } catch ( ClassCastException e) {
  69             System.err.println("Caught expected exception " + e.toString());
  70             e.printStackTrace();
  71         } finally {
  72             in.close();
  73         }
  74     }
  75 }