public function getUid()
    {
        if (is_null($this->uid)) {
            $pathName = (! empty($this->getFileInfo()->getRelativePathname())) ? $this->getFileInfo()->getRelativePathname() : $this->getFileInfo()->getPathname();
            $this->uid = $this->cleanUid($pathName);
        }

        return $this->uid;
    }