/**
  * Retrive the ARP from the database
  *
  * @return true Aæways return true
  */
 private function _loadArp()
 {
     assert('$this->_entity instanceof Sspmod_Janus_Entity');
     if ($this->_entity->getArp() == '0') {
         $this->_arp = null;
     } else {
         $this->_arp = new sspmod_janus_ARP();
         $this->_arp->setAid($this->_entity->getArp());
         $this->_arp->load();
     }
     return true;
 }