/**
  * Execute the action relative an event with the answer provided by the user
  *
  * @param map $params => array {
  *		'id' => String
  *		'answer' => String
  * }
  */
 public function handleAnswer(AbstractEventNotification $event)
 {
     if ($event->getType() === null) {
         throw new EyeInvalidArgumentException('Missing or invalid type property');
     }
     if ($event->getAnswer() === null) {
         throw new EyeInvalidArgumentException('Missing or invalid answer property');
     }
     list($category, $type) = explode('_', $event->getType(), 2);
     $eventHanlderClass = $type . 'Event';
     $eventHandler = new $eventHanlderClass();
     $eventHandler->handleAnswer($event);
 }