| /* |
| * Copyright (c) 1998, 2004, 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 |
| * @clean A WriteObjectMemory |
| * @run main WriteObjectMemory |
| * @bug 4146453 5011410 |
| * @summary Test that regrow of object/handle table of ObjectOutputStream works. |
| */ |
| |
| import java.io.*; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| |
| class A implements Serializable { |
| static HashSet writeObjectExtent = new HashSet(); |
| |
| private void writeObject(ObjectOutputStream out) throws IOException { |
| if (writeObjectExtent.contains(this)) { |
| throw new InvalidObjectException("writeObject: object " + |
| this.toString() + " has already " |
| + "been serialized and should " + |
| "have be serialized by reference."); |
| } else { |
| writeObjectExtent.add(this); |
| } |
| out.defaultWriteObject(); |
| } |
| |
| A() { |
| } |
| } |
| |
| public class WriteObjectMemory { |
| public static void main(String args[]) |
| throws IOException, ClassNotFoundException |
| { |
| ObjectOutputStream out = |
| new ObjectOutputStream(new ByteArrayOutputStream(3000)); |
| for (int i = 0; i < 1000; i++) { |
| out.writeObject(new A()); |
| } |
| |
| // Make sure that serialization subsystem does not |
| // allow writeObject to be called on any objects that |
| // have already been serialized. These objects should be |
| // written out by reference. |
| Iterator iter = A.writeObjectExtent.iterator(); |
| while (iter.hasNext()) { |
| out.writeObject(iter.next()); |
| } |
| |
| out.close(); |
| } |
| } |