J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 5004188 |
| 27 | * @summary Tests how often method equals() is called |
| 28 | * @author Sergey Malenkov |
| 29 | */ |
| 30 | |
| 31 | import java.beans.PropertyChangeEvent; |
| 32 | import java.beans.PropertyChangeListener; |
| 33 | import java.beans.PropertyChangeSupport; |
| 34 | |
| 35 | public final class TestEquals implements PropertyChangeListener { |
| 36 | private static final String PROPERTY = "property"; |
| 37 | |
| 38 | public static void main(String[] args) { |
| 39 | TestEquals one = new TestEquals(1); |
| 40 | TestEquals two = new TestEquals(2); |
| 41 | |
| 42 | Object source = TestEquals.class; |
| 43 | PropertyChangeSupport pcs = new PropertyChangeSupport(source); |
| 44 | pcs.addPropertyChangeListener(PROPERTY, one); |
| 45 | pcs.addPropertyChangeListener(PROPERTY, two); |
| 46 | |
| 47 | PropertyChangeEvent event = new PropertyChangeEvent(source, PROPERTY, one, two); |
| 48 | pcs.firePropertyChange(event); |
| 49 | test(one, two, 1); // only one check |
| 50 | pcs.firePropertyChange(PROPERTY, one, two); |
| 51 | test(one, two, 2); // because it invokes firePropertyChange(PropertyChangeEvent) |
| 52 | pcs.fireIndexedPropertyChange(PROPERTY, 1, one, two); |
| 53 | test(one, two, 2); // because it invokes firePropertyChange(PropertyChangeEvent) |
| 54 | } |
| 55 | |
| 56 | private static void test(TestEquals v1, TestEquals v2, int amount) { |
| 57 | int count = v1.count + v2.count; |
| 58 | if (amount < count) |
| 59 | throw new Error("method equals() is called " + count + " times"); |
| 60 | |
| 61 | v1.count = 0; |
| 62 | v2.count = 0; |
| 63 | } |
| 64 | |
| 65 | private final int value; |
| 66 | private int count; |
| 67 | |
| 68 | private TestEquals(int value) { |
| 69 | this.value = value; |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public boolean equals(Object object) { |
| 74 | if (object instanceof TestEquals) { |
| 75 | this.count++; |
| 76 | TestEquals that = (TestEquals)object; |
| 77 | return that.value == this.value; |
| 78 | } |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | public void propertyChange(PropertyChangeEvent event) { |
| 83 | } |
| 84 | } |