/**
* Retrieves the element's Datas values from the DataSotarage,
* using the recived Id or the element's id if no id is provided.
*
* @param mixed $id the id of the element whose data we whant to read from de DS
* @throws Exception
*
* @todo: in arrays format ????
*/
public function fillFromDSById($id = null)
{
if (isset($id)) {
$this->setId($id);
}
if ($this->getId()) {
$dataArray = $this->dataStorage->readElement($this);
$this->fillFromArray($dataArray);
} else {
throw new Exception('The object of class: ' . $this->getClass() . " has no id so it can't be filled using method fillElementById");
}
}
