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*
* This code is distributed in the hope that it will be useful, but WITHOUT
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* 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).
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @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) {
}
}