Examples of java.beans.VetoableChangeSupport.addVetoableChangeListener()

java.beans.VetoableChangeSupport.addVetoableChangeListener()
Add a VetoableListener to the listener list. The listener is registered for all properties. The same listener object may be added more than once, and will be called as many times as it is added. If listener is null, no exception is thrown and no action is taken. @param listener The VetoableChangeListener to be added


        VetoableChangeListener proxy = EventHandler.create(
                VetoableChangeListener.class, source, "setText");


        String propertyName = "label";
        support.addVetoableChangeListener("label", proxy);


        assertTrue(support.hasListeners(propertyName));
        assertEquals(1, support.getVetoableChangeListeners().length);


        support.removeVetoableChangeListener(proxy);

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        VetoableChangeListener proxy = EventHandler.create(
                VetoableChangeListener.class, source, "setText");


        String propertyName = "label";
        support.addVetoableChangeListener(proxy);


        assertTrue(support.hasListeners(propertyName));
        assertEquals(1, support.getVetoableChangeListeners().length);


        support.removeVetoableChangeListener(null);

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        //VetoableChangeSupport.addVetoableChangeListener(null, listener)
        System.out.println("VetoableChangeSupport.addVetoableChangeListener(null, listener)");
        try {
            vcs.addVetoableChangeListener(null, listener);
            vcs.fireVetoableChange(NAME, null, null);
        }
        catch (Throwable error) {
            print(error);
        }

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        }


        //VetoableChangeSupport.hasListeners(null): with a generic listener
        System.out.println("VetoableChangeSupport.hasListeners(null) with a generic listener");
        try {
            vcs.addVetoableChangeListener(listener);
            if (!vcs.hasListeners(null)) {
                throw new Error("hasListeners(null) returned false, but there was a generic listener");
            }
        }
        catch (Throwable error) {

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        vcs = new VetoableChangeSupport(args); // reset


        //VetoableChangeSupport.hasListeners(null): with a specific listener
        System.out.println("VetoableChangeSupport.hasListeners(null) with a specific listener");
        try {
            vcs.addVetoableChangeListener(NAME, listener);
            if (vcs.hasListeners(null)) {
                throw new Error("hasListeners(null) returned true, but there were no generic listeners - only a specific listener");
            }
        }
        catch (Throwable error) {

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        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

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        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);

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public class TestSynchronization {
    private static boolean isCalled;


    public static void main(String[] args) throws PropertyVetoException {
        final VetoableChangeSupport vcs = new VetoableChangeSupport(TestSynchronization.class);
        vcs.addVetoableChangeListener("name", new VetoableChangeListener() {
            public void vetoableChange(PropertyChangeEvent event) {
                isCalled = true;
            }
        });
        vcs.addVetoableChangeListener(new VetoableChangeListener() {

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        vcs.addVetoableChangeListener("name", new VetoableChangeListener() {
            public void vetoableChange(PropertyChangeEvent event) {
                isCalled = true;
            }
        });
        vcs.addVetoableChangeListener(new VetoableChangeListener() {
            public void vetoableChange(PropertyChangeEvent event) {
                for (VetoableChangeListener listener : vcs.getVetoableChangeListeners())
                    vcs.removeVetoableChangeListener(listener);
            }
        });

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    private static int current;


    public static void main(String[] args) throws PropertyVetoException {
        VetoableChangeSupport vcs = new VetoableChangeSupport(TestListeners.class);
        vcs.addVetoableChangeListener(new TestListeners(0));
        vcs.addVetoableChangeListener(NAME, new TestListeners(2));
        vcs.addVetoableChangeListener(new TestListeners(1));
        vcs.addVetoableChangeListener(NAME, new VetoableChangeListenerProxy(NAME, new TestListeners(3)));

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