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 }