/**
  * Parse the value from a SimpleXml node
  * 
  * @param SimpleXmlElement $xml
  * @param ClassMetadata $metadata
  * @param stdClass $obj
  */
 protected function parseValue(\SimpleXmlElement $xml, ClassMetadata $metadata, $obj)
 {
     if (!is_null($metadata->getValue())) {
         $setter = 'set' . ucfirst($metadata->getValue());
         $value = (string) $xml;
         $obj->{$setter}($value);
     }
 }