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java.lang.Objectorg.apache.commons.lang3.event.EventListenerSupport<L>
L - the type of event listener that is supported by this proxy.public class EventListenerSupport<L>
An EventListenerSupport object can be used to manage a list of event
listeners of a particular type. The class provides
addListener(Object) and removeListener(Object) methods
for registering listeners, as well as a fire() method for firing
events to the listeners.
public class MyActionEventSource
{
private EventListenerSupport actionListeners =
EventListenerSupport.create(ActionListener.class);
public void someMethodThatFiresAction()
{
ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "somethingCool");
actionListeners.fire().actionPerformed(e);
}
}
| Constructor Summary | |
|---|---|
EventListenerSupport(Class<L> listenerInterface)
Creates an EventListenerSupport object which supports the provided listener interface. |
|
EventListenerSupport(Class<L> listenerInterface,
ClassLoader classLoader)
Creates an EventListenerSupport object which supports the provided listener interface using the specified class loader to create the JDK dynamic proxy. |
|
| Method Summary | ||
|---|---|---|
void |
addListener(L listener)
Registers an event listener. |
|
static
|
create(Class<T> listenerInterface)
Creates an EventListenerSupport object which supports the specified listener type. |
|
L |
fire()
Returns a proxy object which can be used to call listener methods on all of the registered event listeners. |
|
void |
removeListener(L listener)
Unregisters an event listener. |
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public EventListenerSupport(Class<L> listenerInterface)
listenerInterface - the type of listener interface that will receive
events posted using this class.
NullPointerException - if listenerInterface is
null.
IllegalArgumentException - if listenerInterface is
not an interface.
public EventListenerSupport(Class<L> listenerInterface,
ClassLoader classLoader)
listenerInterface - the listener interface.classLoader - the class loader.
NullPointerException - if listenerInterface or
classLoader is null.
IllegalArgumentException - if listenerInterface is
not an interface.| Method Detail |
|---|
public static <T> EventListenerSupport<T> create(Class<T> listenerInterface)
listenerInterface - the type of listener interface that will receive
events posted using this class.
NullPointerException - if listenerInterface is
null.
IllegalArgumentException - if listenerInterface is
not an interface.public L fire()
public void addListener(L listener)
listener - the event listener (may not be null).
NullPointerException - if listener is
null.public void removeListener(L listener)
listener - the event listener (may not be null).
NullPointerException - if listener is
null.
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