Joomla CMS
3.10.11 (avec JPlatform 13.1 inclus)
Documentation des API du CMS Joomla en version 3.10.11 et du framework Joomla Platform intégré
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Fonctions membres publiques statiques | |
static | createObserver (JObservableInterface $observableObject, $params=array()) |
Observer pattern interface for Joomla
A class that wants to observe another class must:
1) Add: implements JObserverInterface to its class
2) Implement a constructor, that can look like this: public function __construct(JObservableInterface $observableObject) { $observableObject->attachObserver($this); $this->observableObject = $observableObject; }
3) and must implement the instantiator function createObserver() below, e.g. as follows: public static function createObserver(JObservableInterface $observableObject, $params = array()) { $observer = new self($observableObject); $observer->... = $params['...']; ... return $observer; }
4) Then add functions corresponding to the events to be observed, E.g. to respond to event: $this->_observers->update('onBeforeLoad', array($keys, $reset)); following function is needed in the observer: public function onBeforeLoad($keys, $reset) { ... }
5) Finally, the binding is made outside the observable and observer classes, using: JObserverMapper::addObserverClassToClass('ObserverClassname', 'ObservableClassname', array('paramName' => 'paramValue')); where the last array will be provided to the observer instanciator function createObserver.
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static |
Creates the associated observer instance and attaches it to the $observableObject
JObservableInterface | $observableObject | The observable subject object |
array | $params | Params for this observer |