Examples of java.beans.PropertyChangeEvent

java.beans.PropertyChangeEvent
A "PropertyChange" event gets delivered whenever a bean changes a "bound" or "constrained" property. A PropertyChangeEvent object is sent as an argument to the PropertyChangeListener and VetoableChangeListener methods.
Normally PropertyChangeEvents are accompanied by the name and the old and new value of the changed property. If the new value is a primitive type (such as int or boolean) it must be wrapped as the corresponding java.lang.* Object type (such as Integer or Boolean).
Null values may be provided for the old and the new values if their true values are not known.
An event source may send a null object as the name to indicate that an arbitrary set of if its properties have changed. In this case the old and new values should also be null.

        m_listenerList.remove(PropertyChangeListener.class, l);
    }


    protected void firePropertyChangedEvent(String name, Object oldValue, Object newValue)
    {
        PropertyChangeEvent event = null;


        // Guaranteed to return a non-null array
        Object[] listeners = m_listenerList.getListenerList();


        // Process the listeners last to first, notifying
        // those that are interested in this event
        for (int i = listeners.length - 2; i >= 0; i -= 2)
        {
            if (listeners[i] == PropertyChangeListener.class)
            {
                // Lazily create the event:
                if (event == null)
                {
                    event = new PropertyChangeEvent(this, name, oldValue, newValue);
                }
                ((PropertyChangeListener) listeners[i + 1]).propertyChange(event);
            }
        }
    }

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     */
    protected void fireProviderStatusMessageChangeEvent(
        String oldStatusMessage,
        String newStatusMessage)
    {
        PropertyChangeEvent evt
            = new PropertyChangeEvent(
                    parentProvider,
                    ProviderPresenceStatusListener.STATUS_MESSAGE,
                    oldStatusMessage,
                    newStatusMessage);

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  /**
   * Forteller at det buffer har forandret seg.
   */
  final void fireBufferChange() {
    for (PropertyChangeListener listener : bufferingListeners) {
      listener.propertyChange(new PropertyChangeEvent(
          transportPresentationModel.getBean(), "buffering",
          transportPresentationModel.getBean(),
          transportPresentationModel.isBuffering()));
    }
  }

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  /**
   * Forteller at sentstatus har endret seg.
   */
  final void fireSentChange() {
    for (PropertyChangeListener listener : sentListeners) {
      listener.propertyChange(new PropertyChangeEvent(
          transportPresentationModel.getBean(), "sent", null,
          transportPresentationModel.isBuffering()));
    }
  }

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  /**
   * Forteller at montering har endret seg
   */
  private void fireAsesemblyChanged() {
    for (PropertyChangeListener listener : assemblyChangeListeners) {
      listener.propertyChange(new PropertyChangeEvent(this, "assembly",
          null, null));
    }
  }

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            new PropertyEventNameMatcher(true, (String[]) null);
            fail("Expected exception for PropertyEventNameMatcher constructor");
        } catch (IllegalArgumentException ex) {
            // expected
        }
        final PropertyChangeEvent event1 = new PropertyChangeEvent(this, "test", "old", "new");
        final PropertyChangeEvent event2 = new PropertyChangeEvent(this, "test", null, null);
        final PropertyChangeEvent event3 = new PropertyChangeEvent(this, "hello", "old", "new");
        final PropertyChangeEvent event4 = new PropertyChangeEvent(this, "hello", null, null);
        final PropertyChangeEvent event5 = new PropertyChangeEvent(this, null, null, null);


        Matcher<PropertyChangeEvent> matcher = new PropertyEventNameMatcher(true, new String[] {"test", null});
        assertEquals(true, matcher.matches(event1));
        assertEquals(true, matcher.matches(event2));
        assertEquals(false, matcher.matches(event3));

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   * 
   * @param buffering
   */
  void fireTransportChange(boolean buffering) {
    for (PropertyChangeListener listener : transportChangeListeners) {
      listener.propertyChange(new PropertyChangeEvent(this, null, null,
          buffering));
    }
  }

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    public void addListener(ProfileListener listener, boolean canRemove) {
        if (listener == null) {
            throw new NullPointerException("Cannot add a null listener");
        }
        listeners.put(listener, canRemove);
  PropertyChangeEvent event = 
      new PropertyChangeEvent(this, "com.sun.sgs.profile.threadcount",
            null, schedulerThreadCount);


        listener.propertyChange(event);
        for (ProfileConsumerImpl pc : consumers.values()) {
            for (ProfileOperation p : pc.getOperations()) {
                event = 
                    new PropertyChangeEvent(this, "com.sun.sgs.profile.newop",
              null, p);
                listener.propertyChange(event); 
            }
        }
    }

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    /**
     * Notifies the collector that a thread has been added to the scheduler.
     */
    void notifyThreadAdded() {
        schedulerThreadCount++;
  PropertyChangeEvent event = 
      new PropertyChangeEvent(this, "com.sun.sgs.profile.threadcount",
            schedulerThreadCount - 1, 
            schedulerThreadCount);


        for (ProfileListener listener : listeners.keySet()) {
            listener.propertyChange(event);

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     * Notifies the collector that a thread has been removed from the
     * scheduler.
     */
    void notifyThreadRemoved() {
        schedulerThreadCount--;
  PropertyChangeEvent event = 
      new PropertyChangeEvent(this, "com.sun.sgs.profile.threadcount",
            schedulerThreadCount + 1, 
            schedulerThreadCount);


        for (ProfileListener listener : listeners.keySet()) {
            listener.propertyChange(event);

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