Examples of java.beans.PropertyChangeSupport.addPropertyChangeListener()

java.beans.PropertyChangeSupport.addPropertyChangeListener()
Add a PropertyChangeListener 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 PropertyChangeListener to be added

                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(propertyName, listener);
        }


        @Override
        public synchronized void removePropertyChangeListener(
                String propertyName,

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                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(listener);
        }


        @Override
        public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
            PropertyChangeSupport pcs = (PropertyChangeSupport)

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            pcs = (PropertyChangeSupport) map.get(propName);
            if (pcs == null) {
                pcs = new PropertyChangeSupport(this);
                map.put(propName, pcs);
            }
            pcs.addPropertyChangeListener(l);
        }
    }


    public void removePropertyChangeListener(String propName,
            PropertyChangeListener l) {

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                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(propertyName, listener);
        }


        @Override
        public synchronized void removePropertyChangeListener(
                String propertyName,

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                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(listener);
        }


        @Override
        public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
            PropertyChangeSupport pcs = (PropertyChangeSupport)

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        PropertyChangeListener l3 = new PropertyChangeListenerProxy("myProp",
                l2);
        PropertyChangeListener l4 = new PropertyChangeListenerProxy("myProp",
                l3);


        sup.addPropertyChangeListener(l1);


        assertEquals(1, sup.getPropertyChangeListeners().length);
        assertSame(l1, sup.getPropertyChangeListeners()[0]);


        sup.removePropertyChangeListener(l1);

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        assertEquals(1, sup.getPropertyChangeListeners().length);
        assertSame(l1, sup.getPropertyChangeListeners()[0]);


        sup.removePropertyChangeListener(l1);
        sup.addPropertyChangeListener(l3);
        assertEquals(1, sup.getPropertyChangeListeners().length);
        assertSame(l2, ((PropertyChangeListenerProxy) sup
                .getPropertyChangeListeners()[0]).getListener());
        assertNotSame(l3, sup.getPropertyChangeListeners()[0]);

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                .getPropertyChangeListeners()[0]).getListener());
        assertNotSame(l3, sup.getPropertyChangeListeners()[0]);


        sup.removePropertyChangeListener(sup.getPropertyChangeListeners()[0]);
        assertEquals(0, sup.getPropertyChangeListeners().length);
        sup.addPropertyChangeListener(l4);
        //RI asserts to true here, really strange behavior
        assertNotSame(l3, ((PropertyChangeListenerProxy) sup
                .getPropertyChangeListeners()[0]).getListener());
        assertNotSame(l4, sup.getPropertyChangeListeners()[0]);
        assertSame(

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     */
    public void testAddPropertyChangeListener_PropertyChangeListener_Null() {
        Object src = new Object();
        PropertyChangeSupport sup = new PropertyChangeSupport(src);


        sup.addPropertyChangeListener(null);
        PropertyChangeListener[] listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
    }


    /*

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    public void testAddPropertyChangeListener_PropertyChangeListener_Duplicate() {
        Object src = new Object();
        PropertyChangeSupport sup = new PropertyChangeSupport(src);
        PropertyChangeListener l1 = new MockPropertyChangeListener();


        sup.addPropertyChangeListener(l1);
        sup.addPropertyChangeListener(l1);


        PropertyChangeListener[] listeners = sup.getPropertyChangeListeners();
        assertEquals(2, listeners.length);
        assertSame(l1, listeners[0]);

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