| /* |
| * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 5004188 |
| * @summary Tests how often method equals() is called |
| * @author Sergey Malenkov |
| */ |
| |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyVetoException; |
| import java.beans.VetoableChangeListener; |
| import java.beans.VetoableChangeSupport; |
| |
| public final class TestEquals implements VetoableChangeListener { |
| private static final String PROPERTY = "property"; |
| |
| public static void main(String[] args) throws PropertyVetoException { |
| TestEquals one = new TestEquals(1); |
| TestEquals two = new TestEquals(2); |
| |
| Object source = TestEquals.class; |
| VetoableChangeSupport vcs = new VetoableChangeSupport(source); |
| vcs.addVetoableChangeListener(PROPERTY, one); |
| vcs.addVetoableChangeListener(PROPERTY, two); |
| |
| PropertyChangeEvent event = new PropertyChangeEvent(source, PROPERTY, one, two); |
| vcs.fireVetoableChange(event); |
| test(one, two, 1); // only one check |
| vcs.fireVetoableChange(PROPERTY, one, two); |
| test(one, two, 2); // because it invokes fireVetoableChange(PropertyChangeEvent) |
| } |
| |
| private static void test(TestEquals v1, TestEquals v2, int amount) { |
| int count = v1.count + v2.count; |
| if (amount < count) |
| throw new Error("method equals() is called " + count + " times"); |
| |
| v1.count = 0; |
| v2.count = 0; |
| } |
| |
| private final int value; |
| private int count; |
| |
| private TestEquals(int value) { |
| this.value = value; |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object instanceof TestEquals) { |
| this.count++; |
| TestEquals that = (TestEquals)object; |
| return that.value == this.value; |
| } |
| return false; |
| } |
| |
| public void vetoableChange(PropertyChangeEvent event) { |
| } |
| } |