wicket.util.watch
Class Watcher

java.lang.Object
  wicket.util.watch.Watcher

public final class Watcher
extends java.lang.Object

Similar to ModificationWatcher but manually triggered, calling all registered ChangeListeners when a given object is triggered.

Author:

Juergen Donnerstag

Constructor Summary

Watcher()
Constructor

Method Summary

boolean	add(java.lang.Object key, IChangeListener listener) Adds a key and an IChangeListener to call when the key is triggered.
void	clear() Remove all entries
void	notifyListeners(java.lang.Object key) trigger all listeners registered with key
java.lang.Object	remove(java.lang.Object key) Remove all entries associated with 'modifiable'

Methods inherited from class java.lang.Object

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

Constructor Detail

Watcher

public Watcher()

Constructor

Method Detail

add

public final boolean add(java.lang.Object key,
                         IChangeListener listener)

Adds a key and an IChangeListener to call when the key is triggered.

Note: the value is ignored if the key and an associated value already exists. Only the listeners is added (if an equals does not already exist).

Parameters:

key - The key to identifiy a ChangeListenerSet

listener - The listener to call if the key gets triggered

Returns:

true if the set did not already contain the specified element.

remove

public java.lang.Object remove(java.lang.Object key)

Remove all entries associated with 'modifiable'

Parameters:

key -

Returns:

the object removed, else null

clear

public void clear()

Remove all entries

notifyListeners

public void notifyListeners(java.lang.Object key)

trigger all listeners registered with key

Parameters:

key - The key to identify the ChangeListenerSet