/**
   * Retrieves the Super Column with the key and the column specified
   *
   * @param owner_name The line key (the owner name of file)
   * @param fileName The filename that is a column name of the SuperColumn
   * @return The SuperColumns with the parametres specified
   */
  public QueryResult<HSuperColumn<String, String, String>> getValues(
      String owner_name, String fileName) {
    SuperColumnQuery<String, String, String, String> superColumnQuery =
        HFactory.createSuperColumnQuery(
            keyspaceOperator,
            stringSerializer,
            stringSerializer,
            stringSerializer,
            stringSerializer);

    superColumnQuery.setColumnFamily("UserFiles").setKey(owner_name).setSuperName(fileName);
    QueryResult<HSuperColumn<String, String, String>> result = superColumnQuery.execute();
    return result;
  }