| /* |
| * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* @test |
| * @bug 4217737 |
| * @clean NestedReplace A B C D |
| * @build NestedReplace |
| * @run main NestedReplace |
| * @summary Ensure that replacement objects can nominate their own replacements, |
| * so long as the replacement is not the same class as the |
| * just-replaced object. |
| * |
| */ |
| |
| import java.io.*; |
| |
| class A implements Serializable { |
| Object writeReplace() throws ObjectStreamException { |
| return new B(); |
| } |
| } |
| |
| class B implements Serializable { |
| Object writeReplace() throws ObjectStreamException { |
| return new C(); |
| } |
| } |
| |
| class C implements Serializable { |
| |
| static int writeReplaceCalled = 0; |
| |
| Object writeReplace() throws ObjectStreamException { |
| writeReplaceCalled++; |
| return new C(); |
| } |
| |
| Object readResolve() throws ObjectStreamException { |
| return new D(); |
| } |
| } |
| |
| class D implements Serializable { |
| Object readResolve() throws ObjectStreamException { |
| throw new Error("readResolve() called more than once"); |
| } |
| } |
| |
| public class NestedReplace { |
| public static void main(String[] args) throws Exception { |
| ByteArrayOutputStream bout; |
| ObjectOutputStream oout; |
| ByteArrayInputStream bin; |
| ObjectInputStream oin; |
| Object obj; |
| |
| bout = new ByteArrayOutputStream(); |
| oout = new ObjectOutputStream(bout); |
| oout.writeObject(new A()); |
| oout.flush(); |
| bin = new ByteArrayInputStream(bout.toByteArray()); |
| oin = new ObjectInputStream(bin); |
| obj = oin.readObject(); |
| |
| if (! (obj instanceof D)) |
| throw new Error("Deserialized object is of wrong class"); |
| if (C.writeReplaceCalled != 1) |
| throw new Error("C.writeReplace() should only get called once"); |
| } |
| } |