public function readElement()
  {
    $csv_line_data = $this->spl_file_object->fgetcsv();
    if($csv_line_data)
    {
      $csv_line_data[0] = $this->convertToUtf8($csv_line_data);
      if($this->isValidLine($csv_line_data))
      {
        $csv_line         = array_combine($this->columns_name, $csv_line_data);
        // we cast it to StdClass
        return (object)$csv_line;
      }
    }

    return false;
  }