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 * @clean A B Container ReplacerObjectOutputStream 26 * @summary Verify that ClassCastException is thrown when deserializing 27 * an object and one of its object fields is incompatibly replaced 28 * by either replaceObject/resolveObject. 29 * 30 */ 31 import java.io.*; 32 33 class A implements Serializable {} 34 35 class B implements Serializable {} 36 37 class Container implements Serializable { 38 A a = new A(); 39 } 40 41 class ReplacerObjectOutputStream extends ObjectOutputStream { 42 static B b = new B(); 43 public ReplacerObjectOutputStream(OutputStream out) throws IOException { 44 super(out); 45 enableReplaceObject(true); 46 } 47 48 protected Object replaceObject(Object obj) throws IOException { 49 if(obj instanceof A) { 50 System.err.println("replaceObject(" + obj.toString() + ") with " + 51 b.toString()); 52 return b; 53 } else return obj; 54 } 55 } 56 57 public class BadSubstByReplace { 58 public static void main(String args[]) throws IOException, ClassNotFoundException { 59 Container c = new Container(); 60 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 61 ReplacerObjectOutputStream out = new ReplacerObjectOutputStream(baos); 62 out.writeObject(c); 63 out.close(); 64 ObjectInputStream in = 65 new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray())); 66 try { 67 c = (Container)in.readObject(); // throws IllegalArgumentException. 68 throw new Error("Should have thrown ClassCastException"); 69 } catch ( ClassCastException e) { 70 System.err.println("Caught expected exception " + e.toString()); 71 e.printStackTrace(); 72 } finally { 73 in.close(); 74 } 75 } 76 }