/**
  * Parse all of the xml attributes from a SimpleXml node
  * and set them to the given object
  * 
  * @param SimpleXmlElement $xml
  * @param ClassMetadata $metadata
  * @param stdClass $obj
  */
 protected function parseAttributes(\SimpleXmlElement $xml, ClassMetadata $metadata, $obj)
 {
     foreach ($metadata->getAttributes() as $name => $info) {
         $property = $info[0];
         $nodeName = $info[1];
         if (!is_null($nodeName)) {
             $node = $xml->{$nodeName};
             $value = (string) $node[$name];
         } else {
             $value = (string) $xml[$name];
         }
         $setter = 'set' . ucfirst($property);
         $obj->{$setter}($value);
     }
 }