nextapp.echo.app.event
Class EventListenerList

java.lang.Object
  nextapp.echo.app.event.EventListenerList

All Implemented Interfaces:

java.io.Serializable

public class EventListenerList
extends java.lang.Object
implements java.io.Serializable

A generic storage facility for listeners.

See Also:

Serialized Form

Constructor Summary

EventListenerList()
Creates a new listener list.

Method Summary

void	addListener(java.lang.Class listenerClass, java.util.EventListener l) Adds a listener of the given class to the list.
int	getListenerCount(java.lang.Class listenerClass) Returns the number of listeners present of the given class.
java.util.EventListener[]	getListeners(java.lang.Class listenerClass) Returns an array of listeners of the given class.
void	removeListener(java.lang.Class listenerClass, java.util.EventListener l) Removes a listener of the given class from the list.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EventListenerList

public EventListenerList()

Creates a new listener list.

Method Detail

addListener

public void addListener(java.lang.Class listenerClass,
                        java.util.EventListener l)

Adds a listener of the given class to the list.

Parameters:

listenerClass - the Class of the listener being added

l - the listener to add

getListenerCount

public int getListenerCount(java.lang.Class listenerClass)

Returns the number of listeners present of the given class.

Parameters:

listenerClass - the Class of the listener for which the listener count is desired

Returns:

the number of listeners present for the specified listener Class

getListeners

public java.util.EventListener[] getListeners(java.lang.Class listenerClass)

Returns an array of listeners of the given class.

Parameters:

listenerClass - the desired Class of listener

Returns:

an array of listeners of the given Class (if no listeners of the specified class exist, an empty array is returned)

removeListener

public void removeListener(java.lang.Class listenerClass,
                           java.util.EventListener l)

Removes a listener of the given class from the list.

Parameters:

listenerClass - the Class of the listener being removed

l - the listener to remove