1/* 2 * Copyright (c) 2007, 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 6187118 27 * @summary Tests encoding of immutable list that creates itself 28 * @author Sergey Malenkov 29 */ 30 31import java.beans.Encoder; 32import java.beans.Expression; 33import java.beans.PersistenceDelegate; 34import java.beans.XMLEncoder; 35 36import java.util.ArrayList; 37import java.util.Collections; 38import java.util.Iterator; 39import java.util.List; 40 41public final class Test6187118 extends AbstractTest { 42 public static void main(String[] args) { 43 new Test6187118().test(true); 44 } 45 46 protected ImmutableList<String> getObject() { 47 return new ImmutableList<String>(); 48 } 49 50 protected ImmutableList<String> getAnotherObject() { 51 return new ImmutableList<String>().add("1").add("2").add("3").add("4"); 52 } 53 54 protected void initialize(XMLEncoder encoder) { 55 encoder.setPersistenceDelegate( 56 ImmutableList.class, 57 new PersistenceDelegate() { 58 protected boolean mutatesTo(Object oldInstance, Object newInstance) { 59 return oldInstance.equals(newInstance); 60 } 61 62 protected Expression instantiate(Object oldInstance, Encoder out) { 63 ImmutableList list = (ImmutableList) oldInstance; 64 if (!list.hasEntries()) { 65 return getExpression(oldInstance, ImmutableList.class, "new"); 66 } 67 Object object = list.getLast(); 68 ImmutableList shortenedList = list.removeLast(); 69 return getExpression(oldInstance, shortenedList, "add", object); 70 } 71 72 private Expression getExpression(Object value, Object target, String method, Object... args) { 73 return new Expression(value, target, method, args); 74 } 75 } 76 ); 77 } 78 79 public static final class ImmutableList<T> implements Iterable { 80 private final List<T> list = new ArrayList<T>(); 81 82 public ImmutableList() { 83 } 84 85 private ImmutableList(Iterable<T> iterable) { 86 for (T object : iterable) { 87 this.list.add(object); 88 } 89 } 90 91 public Iterator<T> iterator() { 92 return Collections.unmodifiableList(this.list).iterator(); 93 } 94 95 public ImmutableList<T> add(T object) { 96 ImmutableList<T> list = new ImmutableList<T>(this.list); 97 list.list.add(object); 98 return list; 99 } 100 101 public ImmutableList<T> removeLast() { 102 ImmutableList<T> list = new ImmutableList<T>(this.list); 103 int size = list.list.size(); 104 if (0 < size) { 105 list.list.remove(size - 1); 106 } 107 return list; 108 } 109 110 public T getLast() { 111 int size = this.list.size(); 112 return (0 < size) 113 ? this.list.get(size - 1) 114 : null; 115 } 116 117 public boolean hasEntries() { 118 return 0 < this.list.size(); 119 } 120 121 public boolean equals(Object object) { 122 if (object instanceof ImmutableList) { 123 ImmutableList list = (ImmutableList) object; 124 return this.list.equals(list.list); 125 } 126 return false; 127 } 128 129 public int hashCode() { 130 return this.list.hashCode(); 131 } 132 133 public String toString() { 134 return this.list.toString(); 135 } 136 } 137} 138