public function cleanup($full=false) {
        global $USER, $CFG;

        if ($full) {
            @remove_dir($CFG->tempdir.'/csvimport/'.$this->_type.'/'.$USER->id);
        } else {
            @unlink($CFG->tempdir.'/csvimport/'.$this->_type.'/'.$USER->id.'/'.$this->_iid);
        }
    }