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/*
* 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.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
public final class TestEquals implements PropertyChangeListener {
private static final String PROPERTY = "property";
public static void main(String[] args) {
TestEquals one = new TestEquals(1);
TestEquals two = new TestEquals(2);
Object source = TestEquals.class;
PropertyChangeSupport pcs = new PropertyChangeSupport(source);
pcs.addPropertyChangeListener(PROPERTY, one);
pcs.addPropertyChangeListener(PROPERTY, two);
PropertyChangeEvent event = new PropertyChangeEvent(source, PROPERTY, one, two);
pcs.firePropertyChange(event);
test(one, two, 1); // only one check
pcs.firePropertyChange(PROPERTY, one, two);
test(one, two, 2); // because it invokes firePropertyChange(PropertyChangeEvent)
pcs.fireIndexedPropertyChange(PROPERTY, 1, one, two);
test(one, two, 2); // because it invokes firePropertyChange(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 propertyChange(PropertyChangeEvent event) {
}
}
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