1/* 2 * Copyright (c) 2004, 2013, 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/* 25 * @test 26 * @bug 4679556 27 * @summary Tests for duplication of some kind instances 28 * @author Sergey Malenkov, Mark Davidson, Philip Milne 29 */ 30 31import java.beans.DefaultPersistenceDelegate; 32import java.beans.Encoder; 33import java.beans.Expression; 34import java.beans.XMLEncoder; 35 36/** 37 * Demonstrates the archiver bug, where the XMLEncoder duplicates 38 * the instance of class A because it is required as the target of 39 * a factory method (to produce an instance of class C). 40 * See the output in the file Test.xml for the results and note 41 * the (invalid) forward reference to the instance of class C. 42 * 43 * TO FIX 44 * 45 * Move the first line of the XMLEncoder::mark(Statement method) 46 * to the end of the method. 47 * I.e. replace the mark() method in XMLEncoder with this: 48 * <pre>private void mark(Statement stm) { 49 * Object[] args = stm.getArguments(); 50 * for (int i = 0; i < args.length; i++) { 51 * Object arg = args[i]; 52 * mark(arg, true); 53 * } 54 * mark(stm.getTarget(), false); 55 * }</pre> 56 * 57 * VALID ARCHIVE (WITH FIX): 58 * <pre><?xml version="1.0" encoding="UTF-8"?> 59 * <java version="1.4.0" class="java.beans.XMLDecoder"> 60 * <object class="TestDuplicates$A"> 61 * <void id="TestDuplicates$C0" method="createC"/> 62 * <void property="x"> 63 * <void property="x"> 64 * <object idref="TestDuplicates$C0"/> 65 * </void> 66 * </void> 67 * </object> 68 * </java></pre> 69 * 70 * INVALID ARCHIVE (WITHOUT FIX): 71 * <object class="TestDuplicates$A"> 72 * <void property="x"> 73 * <void property="x"> 74 * <void class="TestDuplicates$A"> 75 * <void property="x"> 76 * <void property="x"> 77 * <object idref="TestDuplicates$C0"/> 78 * </void> 79 * </void> 80 * <void id="TestDuplicates$C0" method="createC"/> 81 * </void> 82 * <object idref="TestDuplicates$C0"/> 83 * </void> 84 * </void> 85 * <void id="TestDuplicates$C0" method="createC"/> 86 * </object> 87 * </java></pre> 88 */ 89public class Test4679556 extends AbstractTest { 90 public static void main(String[] args) { 91 new Test4679556().test(true); 92 } 93 94 protected Object getObject() { 95 A a = new A(); 96 B b = (B) a.getX(); 97 b.setX(a.createC()); 98 return a; 99 } 100 101 protected Object getAnotherObject() { 102 return new A(); 103 } 104 105 protected void initialize(XMLEncoder encoder) { 106 encoder.setPersistenceDelegate(C.class, new DefaultPersistenceDelegate() { 107 protected Expression instantiate(Object oldInstance, Encoder out) { 108 C c = (C) oldInstance; 109 return new Expression(c, c.getX(), "createC", new Object[] {}); 110 } 111 }); 112 } 113 114 public static class Base { 115 private Object x; 116 117 public Object getX() { 118 return this.x; 119 } 120 121 public void setX(Object x) { 122 this.x = x; 123 } 124 } 125 126 public static class A extends Base { 127 public A() { 128 setX(new B()); 129 } 130 131 public C createC() { 132 return new C(this); 133 } 134 } 135 136 public static class B extends Base { 137 } 138 139 public static class C extends Base { 140 private C(Object x) { 141 setX(x); 142 } 143 } 144} 145