| /* |
| * Copyright (c) 2000, 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 |
| * @summary Test proper functioning of class-defined writeReplace methods. |
| */ |
| |
| import java.io.*; |
| |
| public class WriteReplace { |
| |
| static class ReplaceMe implements Serializable { |
| private Object obj; |
| private boolean writeReplaceCalled = false; |
| |
| public ReplaceMe(Object obj) { |
| this.obj = obj; |
| } |
| |
| private Object writeReplace() throws ObjectStreamException { |
| if (writeReplaceCalled) { |
| throw new Error("multiple calls to writeReplace"); |
| } |
| writeReplaceCalled = true; |
| return obj; |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| final int nobjs = 10; |
| final int nrounds = 10; |
| |
| Object common = "foo"; |
| ReplaceMe[] objs = new ReplaceMe[nobjs]; |
| for (int i = 0; i < nobjs; i++) { |
| objs[i] = new ReplaceMe(common); |
| } |
| |
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| ObjectOutputStream oout = new ObjectOutputStream(bout); |
| for (int i = 0; i < nrounds; i++) { |
| for (int j = 0; j < nobjs; j++) { |
| oout.writeObject(objs[j]); |
| } |
| } |
| |
| oout.flush(); |
| ByteArrayInputStream bin = |
| new ByteArrayInputStream(bout.toByteArray()); |
| ObjectInputStream oin = new ObjectInputStream(bin); |
| common = null; |
| |
| for (int i = 0; i < nrounds; i++) { |
| for (int j = 0; j < nobjs; j++) { |
| if (common == null) { |
| common = oin.readObject(); |
| } else { |
| if (oin.readObject() != common) { |
| throw new Error("incorrect replacement object"); |
| } |
| } |
| } |
| } |
| } |
| } |