code: private GeometryColumnsDao getGeometryColumnsDao() throws SQLException {
  		if (geometryColumnsDao == null) {
  			geometryColumnsDao = DaoManager.createDao(connectionSource,
  					GeometryColumns.class);
  		}
  		return geometryColumnsDao;
  	}
docs: Get or create a Geometry Columns DAO
  
  @return geometry columns dao
  @throws SQLException
  upon dao creation failure