/**
  * return values as array
  * 
  * @return array
  */
 public function toArray()
 {
     $conditions = array();
     foreach ($this->_conditions as $condition) {
         $conditions[] = $condition->toArray();
     }
     $action = $this->_action->toArray();
     return array('conditions' => $conditions, 'action_type' => $action['type'], 'action_argument' => $action['argument'], 'conjunction' => $this->_conjunction, 'enabled' => (int) $this->_enabled, 'id' => $this->_id);
 }