code: public boolean isSupportedPropertyType(int sqlTypeId, String sqlTypeName) throws SQLException {
          switch (sqlTypeId) {
              case Types.BOOLEAN:
              case Types.DOUBLE:
              case Types.FLOAT:
              case Types.INTEGER:
              case Types.BIGINT:
              case Types.SMALLINT:
              case Types.DATE:
              case Types.VARCHAR:
              case Types.NCHAR:
              case Types.CHAR:
              case Types.ARRAY:
              case Types.OTHER:
              case Types.DECIMAL:
              case Types.REAL:  
              case Types.TINYINT: 
              case Types.NUMERIC: 
              case Types.NULL:
                  return true;
              default:
                  throw new SQLException("Field type not supported by GeoJSON driver: " + sqlTypeName);
          }
      }
docs: Return true is the SQL type is supported by the GeoJSON driver.
  
  @param sqlTypeId
  @param sqlTypeName
  @return
  @throws SQLException