code: public void setJdbcLevel(String jdbcLevel)
      {
          if (jdbcLevel != null)
          {
              try
              {
                  double intLevel = Double.parseDouble(jdbcLevel);
                  setJdbcLevel(intLevel);
              }
              catch(NumberFormatException nfe)
              {
                  setJdbcLevel(2.0);
                  logger.info("Specified JDBC level was not numeric (Value=" + jdbcLevel + "), used default jdbc level of 2.0 ");
              }
          }
          else
          {
              setJdbcLevel(2.0);
              logger.info("Specified JDBC level was null, used default jdbc level of 2.0 ");
          }
      }
docs: Sets the jdbcLevel. parse the string setting and check that it is indeed an integer.
  @param jdbcLevel The jdbcLevel to set