/**
   * Call webservice to obtain specific JDBC string for country.
   *
   * @param c country
   * @return JDBC connection string or null if error
   */
  public JdbcXml doGetJdbc(Country c) {
    JdbcXml execute;
    RequestBuilder rb = new RequestBuilder();
    rb.withURI(getUrl().toString());
    rb.withMethod("GET");
    rb.withContentType("application/xml");
    rb.withEntity(c.getCountry());
    Request r = rb.build();

    try {
      execute = (JdbcXml) execute(r, JdbcXml.class);
    } catch (Exception e) {
      throw new DbLocatorException(e);
    }
    return execute;
  }