test/java/beans/PropertyChangeSupport/TestListeners.java

/*
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 * 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
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 * questions.
 */

/*
 * @test
 * @bug 5004188
 * @summary Tests sequence of listeners
 * @author Sergey Malenkov
 */

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeListenerProxy;
import java.beans.PropertyChangeSupport;

public final class TestListeners implements PropertyChangeListener {
    private static final String NAME = "property";
    private static final String NONE = "broken";

    private static int current;

    public static void main(String[] args) {
        PropertyChangeSupport pcs = new PropertyChangeSupport(TestListeners.class);
        pcs.addPropertyChangeListener(new TestListeners(0));
        pcs.addPropertyChangeListener(NAME, new TestListeners(2));
        pcs.addPropertyChangeListener(new TestListeners(1));
        pcs.addPropertyChangeListener(NAME, new PropertyChangeListenerProxy(NAME, new TestListeners(3)));


        current = 0;
        pcs.firePropertyChange(NAME, 0, 1);
        if (current != 4)
            throw new Error("Expected 4 listeners, but called " + current);

        current = 0;
        pcs.firePropertyChange(NONE, 1, 0);
        if (current != 2)
            throw new Error("Expected 2 listeners, but called " + current);


        PropertyChangeListener[] all = pcs.getPropertyChangeListeners();
        if (all.length != 4)
            throw new Error("Expected 4 listeners, but contained " + all.length);

        PropertyChangeListener[] named = pcs.getPropertyChangeListeners(NAME);
        if (named.length != 2)
            throw new Error("Expected 2 named listeners, but contained " + named.length);

        PropertyChangeListener[] other = pcs.getPropertyChangeListeners(NONE);
        if (other.length != 0)
            throw new Error("Expected 0 other listeners, but contained " + other.length);

        pcs.removePropertyChangeListener(new TestListeners(0));
        pcs.removePropertyChangeListener(new TestListeners(1));
        pcs.removePropertyChangeListener(NAME, new TestListeners(2));
        pcs.removePropertyChangeListener(NAME, new PropertyChangeListenerProxy(NAME, new TestListeners(3)));

        all = pcs.getPropertyChangeListeners();
        if (all.length != 0)
            throw new Error("Expected 4 listeners, but contained " + all.length);

        named = pcs.getPropertyChangeListeners(NAME);
        if (named.length != 0)
            throw new Error("Expected 2 named listeners, but contained " + named.length);

        other = pcs.getPropertyChangeListeners(NONE);
        if (other.length != 0)
            throw new Error("Expected 0 other listeners, but contained " + other.length);
    }

    private final int index;

    public TestListeners(int index) {
        this.index = index;
    }

    public void propertyChange(PropertyChangeEvent event) {
        if (this.index < 0)
            throw new Error("Unexpected listener: " + this.index);

        System.out.println("index = " + this.index);
        if (this.index != current++)
            throw new Error("Unexpected listener: " + this.index);
    }

    @Override
    public boolean equals(Object object) {
        if (object instanceof TestListeners) {
            TestListeners test = (TestListeners)object;
            return test.index == this.index;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return this.index;
    }
}