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(propertyName, null);


        assertFalse(support.hasListeners(propertyName));
        assertEquals(0, support.getVetoableChangeListeners(propertyName).length);


        support.removeVetoableChangeListener(propertyName, proxy);

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


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


        support.removeVetoableChangeListener(propertyName, proxy);
        assertTrue(support.hasListeners(propertyName));
        assertEquals(0, support.getVetoableChangeListeners(propertyName).length);

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


        String propertyName = "label";
        support.addVetoableChangeListener(propertyName, proxy);
        assertTrue(support.hasListeners(propertyName));
            support.removeVetoableChangeListener(null, proxy);
    }


    /*

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


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


        support.removeVetoableChangeListener(propertyName + "_invalid", proxy);
        assertTrue(support.hasListeners(propertyName));
        assertEquals(1, support.getVetoableChangeListeners(propertyName).length);

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


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


        support.removeVetoableChangeListener(proxy);
        assertFalse(support.hasListeners(propertyName));
        assertEquals(0, support.getVetoableChangeListeners(propertyName).length);

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


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


        assertTrue(support.hasListeners(propertyName));
        assertEquals(2, support.getVetoableChangeListeners().length);

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


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


        assertTrue(support.hasListeners(propertyName));
        assertEquals(2, support.getVetoableChangeListeners().length);


        support.removeVetoableChangeListener(proxy);

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                VetoableChangeListener.class, source, "setText");
        VetoableChangeListener proxy2 = EventHandler.create(
                VetoableChangeListener.class, source, "getText");


        String propertyName = "label";
        support.addVetoableChangeListener(proxy);
        support.addVetoableChangeListener(proxy2);


        assertTrue(support.hasListeners(propertyName));
        assertEquals(2, support.getVetoableChangeListeners().length);

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        VetoableChangeListener proxy2 = EventHandler.create(
                VetoableChangeListener.class, source, "getText");


        String propertyName = "label";
        support.addVetoableChangeListener(proxy);
        support.addVetoableChangeListener(proxy2);


        assertTrue(support.hasListeners(propertyName));
        assertEquals(2, support.getVetoableChangeListeners().length);


        support.removeVetoableChangeListener(proxy);

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


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


        assertFalse(support.hasListeners(propertyName));
        assertEquals(0, support.getVetoableChangeListeners().length);


        support.removeVetoableChangeListener(proxy);

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