1/* 2 * Copyright (c) 1998, 2012, 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 * @bug 4146453 26 * @summary Test that regrow of object/handle table of ObjectOutputStream works. 27 */ 28 29import java.io.*; 30import java.util.HashSet; 31import java.util.Iterator; 32 33class A implements Serializable { 34 static HashSet writeObjectExtent = new HashSet(); 35 36 private void writeObject(ObjectOutputStream out) throws IOException { 37 if (writeObjectExtent.contains(this)) { 38 throw new InvalidObjectException("writeObject: object " + 39 this.toString() + " has already " 40 + "been serialized and should " + 41 "have be serialized by reference."); 42 } else { 43 writeObjectExtent.add(this); 44 } 45 out.defaultWriteObject(); 46 } 47 48 A() { 49 } 50} 51 52public class VerifyDynamicObjHandleTable { 53 public static void main(String args[]) 54 throws IOException, ClassNotFoundException 55 { 56 ObjectOutputStream out = 57 new ObjectOutputStream(new ByteArrayOutputStream(3000)); 58 for (int i = 0; i < 1000; i++) { 59 out.writeObject(new A()); 60 } 61 62 // Make sure that serialization subsystem does not 63 // allow writeObject to be called on any objects that 64 // have already been serialized. These objects should be 65 // written out by reference. 66 Iterator iter = A.writeObjectExtent.iterator(); 67 while (iter.hasNext()) { 68 out.writeObject(iter.next()); 69 } 70 71 out.close(); 72 } 73} 74