src-openjdk/test/java/beans/VetoableChangeSupport/TestMethods.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.
 *
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 */

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

import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.beans.VetoableChangeListener;
import java.beans.VetoableChangeSupport;

enum Fire {
    PropertyChangeEvent,
    PropertyObject,
    PropertyInteger,
    PropertyBoolean,
}

public class TestMethods extends VetoableChangeSupport implements VetoableChangeListener {
    private static final String NAME = "property";

    public static void main(String[] args) throws PropertyVetoException {
        Object source = new Object();
        new TestMethods(source).fireVetoableChange(new PropertyChangeEvent(source, NAME, null, null));
        new TestMethods(source).fireVetoableChange(NAME, null, null);
        new TestMethods(source).fireVetoableChange(NAME, 0, 1);
        new TestMethods(source).fireVetoableChange(NAME, true, false);
    }

    private Fire state;

    public TestMethods(Object source) {
        super(source);
        addVetoableChangeListener(this);
    }

    public void vetoableChange(PropertyChangeEvent event) {
        if (this.state != Fire.PropertyChangeEvent)
            throw new Error("Illegal state: " + this.state);
    }

    @Override
    public void fireVetoableChange(String property, Object oldValue, Object newValue) throws PropertyVetoException {
        if ((this.state != null) && (this.state != Fire.PropertyBoolean) && (this.state != Fire.PropertyInteger))
            throw new Error("Illegal state: " + this.state);

        this.state = Fire.PropertyObject;
        super.fireVetoableChange(property, oldValue, newValue);
    }

    @Override
    public void fireVetoableChange(String property, int oldValue, int newValue) throws PropertyVetoException {
        if (this.state != null)
            throw new Error("Illegal state: " + this.state);

        this.state = Fire.PropertyInteger;
        super.fireVetoableChange(property, oldValue, newValue);
    }

    @Override
    public void fireVetoableChange(String property, boolean oldValue, boolean newValue) throws PropertyVetoException {
        if (this.state != null)
            throw new Error("Illegal state: " + this.state);

        this.state = Fire.PropertyBoolean;
        super.fireVetoableChange(property, oldValue, newValue);
    }

    @Override
    public void fireVetoableChange(PropertyChangeEvent event) throws PropertyVetoException {
        if ((this.state != null) && (this.state != Fire.PropertyObject))
            throw new Error("Illegal state: " + this.state);

        this.state = Fire.PropertyChangeEvent;
        super.fireVetoableChange(event);
    }
}