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 5004188
27 * @summary Tests how often method equals() is called
28 * @author Sergey Malenkov
29 */
30
31import java.beans.PropertyChangeEvent;
32import java.beans.PropertyChangeListener;
33import java.beans.PropertyChangeSupport;
34
35public 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}
85