com.conveyal.gtfs.loader

Interface EntityPopulator<T>

public interface EntityPopulator<T>

For now we will copy all available fields into Java model objects. We could also have entity cursors with accessor functions that move along the results, and only look at the fields we need. We could even select only the required fields from the backend database but that gets messy. Anecdotal evidence suggests this would give about a 1/3 speedup. But other observations show no speedup at all. The main benefit would be grabbing arbitrary extension columns. TODO associate EntityPopulator more closely with Entity types and Table instances, so you can get one from the other. e.g. getEntityPopulator() and getTableSpec() on Entity classes. TODO maybe instantiate EntityCreators with a columnForName map to avoid passing them around and make them implement Iterable Could even initialize with the resultSet and call it a Factory // FIXME URLs? This might also be useable with Commons DBUtils as a result row processor. // FIXME add this interface to Entity itself. And add reader / writer functions to entity as well?

Field Summary

Fields

Modifier and Type	Field and Description
static EntityPopulator<Agency>	AGENCY
static EntityPopulator<Calendar>	CALENDAR
static EntityPopulator<CalendarDate>	CALENDAR_DATE
static EntityPopulator<FareAttribute>	FARE_ATTRIBUTE
static EntityPopulator<Frequency>	FREQUENCY
static org.slf4j.Logger	LOG
static EntityPopulator<PatternStop>	PATTERN_STOP
static EntityPopulator<Route>	ROUTE
static EntityPopulator<ScheduleException>	SCHEDULE_EXCEPTION
static EntityPopulator<ShapePoint>	SHAPE_POINT
static EntityPopulator<Stop>	STOP
static EntityPopulator<StopTime>	STOP_TIME
static EntityPopulator<Trip>	TRIP

Method Summary

Modifier and Type	Method and Description
static LocalDate	getDateIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static List<LocalDate>	getDateListIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static double	getDoubleIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static int	getIntIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static String	getStringIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static List<String>	getStringListIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
static URL	getUrlIfPresent(ResultSet resultSet, String columnName, gnu.trove.map.TObjectIntMap<String> columnForName)
T	populate(ResultSet results, gnu.trove.map.TObjectIntMap<String> columnForName)

Field Detail

LOG

static final org.slf4j.Logger LOG

PATTERN_STOP

static final EntityPopulator<PatternStop> PATTERN_STOP

AGENCY

static final EntityPopulator<Agency> AGENCY

CALENDAR

static final EntityPopulator<Calendar> CALENDAR

CALENDAR_DATE

static final EntityPopulator<CalendarDate> CALENDAR_DATE

FARE_ATTRIBUTE

static final EntityPopulator<FareAttribute> FARE_ATTRIBUTE

FREQUENCY

static final EntityPopulator<Frequency> FREQUENCY

SCHEDULE_EXCEPTION

static final EntityPopulator<ScheduleException> SCHEDULE_EXCEPTION

ROUTE

static final EntityPopulator<Route> ROUTE

STOP

static final EntityPopulator<Stop> STOP

TRIP

static final EntityPopulator<Trip> TRIP

SHAPE_POINT

static final EntityPopulator<ShapePoint> SHAPE_POINT

STOP_TIME

static final EntityPopulator<StopTime> STOP_TIME

Method Detail

populate

T populate(ResultSet results,
           gnu.trove.map.TObjectIntMap<String> columnForName)
    throws SQLException

Throws:

SQLException

getStringIfPresent

static String getStringIfPresent(ResultSet resultSet,
                                 String columnName,
                                 gnu.trove.map.TObjectIntMap<String> columnForName)
                          throws SQLException

Throws:

SQLException

getDateIfPresent

static LocalDate getDateIfPresent(ResultSet resultSet,
                                  String columnName,
                                  gnu.trove.map.TObjectIntMap<String> columnForName)
                           throws SQLException

Throws:

SQLException

getStringListIfPresent

static List<String> getStringListIfPresent(ResultSet resultSet,
                                           String columnName,
                                           gnu.trove.map.TObjectIntMap<String> columnForName)
                                    throws SQLException

Throws:

SQLException

getDateListIfPresent

static List<LocalDate> getDateListIfPresent(ResultSet resultSet,
                                            String columnName,
                                            gnu.trove.map.TObjectIntMap<String> columnForName)
                                     throws SQLException

Throws:

SQLException

getUrlIfPresent

static URL getUrlIfPresent(ResultSet resultSet,
                           String columnName,
                           gnu.trove.map.TObjectIntMap<String> columnForName)
                    throws SQLException

Throws:

SQLException

getDoubleIfPresent

static double getDoubleIfPresent(ResultSet resultSet,
                                 String columnName,
                                 gnu.trove.map.TObjectIntMap<String> columnForName)
                          throws SQLException

Throws:

SQLException

getIntIfPresent

static int getIntIfPresent(ResultSet resultSet,
                           String columnName,
                           gnu.trove.map.TObjectIntMap<String> columnForName)
                    throws SQLException

Throws:

SQLException