private TemplateResult getUsers(
      DataAccess access, DataTemplate template, Map<String, String> param) throws BaseException {
    DataSource dataSource = getDataSource(access, param.get(Helper.Keys.SourceId));
    if (dataSource.getState() != DataInformation.DataState.READY)
      throw new NotReadyException("The datasource %s is not yet ready.", dataSource.getId());

    User[] users = dataSource.getUsers();

    users = Helper.applyPaging(users, param);

    return template.transform(users);
  }