/**
  * Get ResourceStreamInfo for the media link entry or named stream request.
  * 
  * @return ResourceStreamInfo/NULL Instance of ResourceStreamInfo if the
  *         current request targets named stream, NULL for MLE
  */
 public function getResourceStreamInfo()
 {
     //assert($this->isMediaResource)
     if ($this->isNamedStream()) {
         return $this->getTargetResourceType()->tryResolveNamedStreamByName($this->_lastSegmentDescriptor->getIdentifier());
     }
     return null;
 }