/**
* Remove a PropertyChangeListener from the listener list. This removes a PropertyChangeListener
* that was registered for all properties. If <code>listener</code> was added more than once to
* the same event source, it will be notified one less time after being removed. If <code>listener
* </code> is null, or was never added, no exception is thrown and no action is taken.
*
* @param listener The PropertyChangeListener to be removed
*/
public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
if (listener == null) {
return;
}
if (listener instanceof PropertyChangeListenerProxy) {
PropertyChangeListenerProxy proxy = (PropertyChangeListenerProxy) listener;
// Call two argument remove method.
removePropertyChangeListener(
proxy.getPropertyName(), (PropertyChangeListener) proxy.getListener());
} else {
if (listeners == null) {
return;
}
listeners.remove(listener);
}
}
/**
* 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 <code>listener</code> is null, no exception is thrown and no action is
* taken.
*
* @param listener The PropertyChangeListener to be added
*/
public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {
if (listener == null) {
return;
}
if (listener instanceof PropertyChangeListenerProxy) {
PropertyChangeListenerProxy proxy = (PropertyChangeListenerProxy) listener;
// Call two argument add method.
addPropertyChangeListener(
proxy.getPropertyName(), (PropertyChangeListener) proxy.getListener());
} else {
if (listeners == null) {
listeners = new EventListenerAggregate(PropertyChangeListener.class);
}
listeners.add(listener);
}
}