public GraphIndex(Graph graph) {
LOG.info("Indexing graph...");
for (String feedId : graph.getFeedIds()) {
for (Agency agency : graph.getAgencies(feedId)) {
Map<String, Agency> agencyForId = agenciesForFeedId.getOrDefault(feedId, new HashMap<>());
agencyForId.put(agency.getId(), agency);
this.agenciesForFeedId.put(feedId, agencyForId);
}
}
Collection<Edge> edges = graph.getEdges();
/* We will keep a separate set of all vertices in case some have the same label.
* Maybe we should just guarantee unique labels. */
Set<Vertex> vertices = Sets.newHashSet();
for (Edge edge : edges) {
vertices.add(edge.getFromVertex());
vertices.add(edge.getToVertex());
if (edge instanceof TablePatternEdge) {
TablePatternEdge patternEdge = (TablePatternEdge) edge;
TripPattern pattern = patternEdge.getPattern();
patternForId.put(pattern.code, pattern);
}
}
for (Vertex vertex : vertices) {
vertexForId.put(vertex.getLabel(), vertex);
if (vertex instanceof TransitStop) {
TransitStop transitStop = (TransitStop) vertex;
Stop stop = transitStop.getStop();
stopForId.put(stop.getId(), stop);
stopVertexForStop.put(stop, transitStop);
stopsForParentStation.put(stop.getParentStation(), stop);
}
}
for (TransitStop stopVertex : stopVertexForStop.values()) {
Envelope envelope = new Envelope(stopVertex.getCoordinate());
stopSpatialIndex.insert(envelope, stopVertex);
}
for (TripPattern pattern : patternForId.values()) {
patternsForFeedId.put(pattern.getFeedId(), pattern);
patternsForRoute.put(pattern.route, pattern);
for (Trip trip : pattern.getTrips()) {
patternForTrip.put(trip, pattern);
tripForId.put(trip.getId(), trip);
}
for (Stop stop : pattern.getStops()) {
patternsForStop.put(stop, pattern);
}
}
for (Route route : patternsForRoute.asMap().keySet()) {
routeForId.put(route.getId(), route);
}
// Copy these two service indexes from the graph until we have better ones.
calendarService = graph.getCalendarService();
serviceCodes = graph.serviceCodes;
this.graph = graph;
LOG.info("Done indexing graph.");
}
// this could be handled by method overloading on Vertex
public boolean isWheelchairAccessible(Vertex v) {
if (v instanceof TransitStop) {
TransitStop ts = (TransitStop) v;
return ts.hasWheelchairEntrance();
} else if (v instanceof StreetLocation) {
StreetLocation sl = (StreetLocation) v;
return sl.isWheelchairAccessible();
}
return true;
}
/**
* FIXME OBA parentStation field is a string, not an AgencyAndId, so it has no agency/feed scope
* But the DC regional graph has no parent stations pre-defined, so no use dealing with them for
* now. However Trimet stops have "landmark" or Transit Center parent stations, so we don't use
* the parent stop field.
*
* <p>Ideally in the future stop clusters will replicate and/or share implementation with GTFS
* parent stations.
*
* <p>We can't use a similarity comparison, we need exact matches. This is because many street
* names differ by only one letter or number, e.g. 34th and 35th or Avenue A and Avenue B.
* Therefore normalizing the names before the comparison is essential. The agency must provide
* either parent station information or a well thought out stop naming scheme to cluster stops --
* no guessing is reasonable without that information.
*/
public void clusterStops() {
int psIdx = 0; // unique index for next parent stop
LOG.info("Clustering stops by geographic proximity and name...");
// Each stop without a cluster will greedily claim other stops without clusters.
for (Stop s0 : stopForId.values()) {
if (stopClusterForStop.containsKey(s0))
continue; // skip stops that have already been claimed by a cluster
String s0normalizedName = StopNameNormalizer.normalize(s0.getName());
StopCluster cluster = new StopCluster(String.format("C%03d", psIdx++), s0normalizedName);
// LOG.info("stop {}", s0normalizedName);
// No need to explicitly add s0 to the cluster. It will be found in the spatial index query
// below.
Envelope env = new Envelope(new Coordinate(s0.getLon(), s0.getLat()));
env.expandBy(
SphericalDistanceLibrary.metersToLonDegrees(CLUSTER_RADIUS, s0.getLat()),
SphericalDistanceLibrary.metersToDegrees(CLUSTER_RADIUS));
for (TransitStop ts1 : stopSpatialIndex.query(env)) {
Stop s1 = ts1.getStop();
double geoDistance =
SphericalDistanceLibrary.fastDistance(
s0.getLat(), s0.getLon(), s1.getLat(), s1.getLon());
if (geoDistance < CLUSTER_RADIUS) {
String s1normalizedName = StopNameNormalizer.normalize(s1.getName());
// LOG.info(" --> {}", s1normalizedName);
// LOG.info(" geodist {} stringdist {}", geoDistance, stringDistance);
if (s1normalizedName.equals(s0normalizedName)) {
// Create a bidirectional relationship between the stop and its cluster
cluster.children.add(s1);
stopClusterForStop.put(s1, cluster);
}
}
}
cluster.computeCenter();
stopClusterForId.put(cluster.id, cluster);
}
// LOG.info("Done clustering stops.");
// for (StopCluster cluster : stopClusterForId.values()) {
// LOG.info("{} at {} {}", cluster.name, cluster.lat, cluster.lon);
// for (Stop stop : cluster.children) {
// LOG.info(" {}", stop.getName());
// }
// }
}
@Test
public final void testOnBoardDepartureAtArrivalTime() {
Coordinate[] coordinates = new Coordinate[2];
coordinates[0] = new Coordinate(0.0, 0.0);
coordinates[1] = new Coordinate(0.0, 1.0);
TransitStop station0 = mock(TransitStop.class);
TransitStop station1 = mock(TransitStop.class);
PatternDepartVertex depart = mock(PatternDepartVertex.class);
PatternArriveVertex arrive = mock(PatternArriveVertex.class);
Graph graph = mock(Graph.class);
RoutingRequest routingRequest = mock(RoutingRequest.class);
ServiceDay serviceDay = mock(ServiceDay.class);
when(graph.getTimeZone()).thenReturn(TimeZone.getTimeZone("GMT"));
when(station0.getX()).thenReturn(coordinates[0].x);
when(station0.getY()).thenReturn(coordinates[0].y);
when(station1.getX()).thenReturn(coordinates[1].x);
when(station1.getY()).thenReturn(coordinates[1].y);
RoutingContext routingContext = new RoutingContext(routingRequest, graph, null, arrive);
AgencyAndId agencyAndId = new AgencyAndId("Agency", "ID");
Route route = new Route();
ArrayList<StopTime> stopTimes = new ArrayList<StopTime>(2);
StopTime stopDepartTime = new StopTime();
StopTime stopArriveTime = new StopTime();
Stop stopDepart = new Stop();
Stop stopArrive = new Stop();
Trip trip = new Trip();
routingContext.serviceDays = new ArrayList<ServiceDay>(Collections.singletonList(serviceDay));
route.setId(agencyAndId);
stopDepart.setId(new AgencyAndId("Station", "0"));
stopArrive.setId(new AgencyAndId("Station", "1"));
stopDepartTime.setStop(stopDepart);
stopDepartTime.setDepartureTime(0);
stopArriveTime.setArrivalTime(10);
stopArriveTime.setStop(stopArrive);
stopTimes.add(stopDepartTime);
stopTimes.add(stopArriveTime);
trip.setId(agencyAndId);
TripTimes tripTimes = new TripTimes(trip, stopTimes, new Deduplicator());
StopPattern stopPattern = new StopPattern(stopTimes);
TripPattern tripPattern = new TripPattern(route, stopPattern);
when(depart.getTripPattern()).thenReturn(tripPattern);
PatternHop patternHop = new PatternHop(depart, arrive, stopDepart, stopArrive, 0);
when(graph.getEdges()).thenReturn(Collections.<Edge>singletonList(patternHop));
when(depart.getCoordinate()).thenReturn(new Coordinate(0, 0));
when(arrive.getCoordinate()).thenReturn(new Coordinate(0, 0));
when(routingRequest.getFrom()).thenReturn(new GenericLocation());
when(routingRequest.getStartingTransitTripId()).thenReturn(agencyAndId);
when(serviceDay.secondsSinceMidnight(anyInt())).thenReturn(10);
when(graph.getVertex("Station_0")).thenReturn(station0);
when(graph.getVertex("Station_1")).thenReturn(station1);
tripPattern.add(tripTimes);
graph.index = new GraphIndex(graph);
Vertex vertex = onBoardDepartServiceImpl.setupDepartOnBoard(routingContext);
assertEquals(coordinates[1].x, vertex.getX(), 0.0);
assertEquals(coordinates[1].y, vertex.getY(), 0.0);
}
public void setUp() throws Exception {
context = GtfsLibrary.readGtfs(new File(ConstantsForTests.FAKE_GTFS));
graph = new Graph();
GTFSPatternHopFactory factory = new GTFSPatternHopFactory(context);
factory.run(graph);
graph.putService(
CalendarServiceData.class, GtfsLibrary.createCalendarServiceData(context.getDao()));
String[] stops = {
"agency:A",
"agency:B",
"agency:C",
"agency:D",
"agency:E",
"agency:entrance_a",
"agency:entrance_b"
};
for (int i = 0; i < stops.length; ++i) {
TransitStop stop = (TransitStop) (graph.getVertex(stops[i]));
IntersectionVertex front =
new IntersectionVertex(
graph, "near_1_" + stop.getStopId(), stop.getX() + 0.0001, stop.getY() + 0.0001);
IntersectionVertex back =
new IntersectionVertex(
graph, "near_2_" + stop.getStopId(), stop.getX() - 0.0001, stop.getY() - 0.0001);
StreetEdge street1 =
new StreetEdge(
front,
back,
GeometryUtils.makeLineString(
stop.getX() + 0.0001,
stop.getY() + 0.0001,
stop.getX() - 0.0001,
stop.getY() - 0.0001),
"street",
100,
StreetTraversalPermission.ALL,
false);
StreetEdge street2 =
new StreetEdge(
back,
front,
GeometryUtils.makeLineString(
stop.getX() - 0.0001,
stop.getY() - 0.0001,
stop.getX() + 0.0001,
stop.getY() + 0.0001),
"street",
100,
StreetTraversalPermission.ALL,
true);
}
NetworkLinker nl = new NetworkLinker(graph);
nl.createLinkage();
}
public void testTransfers() throws Exception {
TransferTable transferTable = graph.getTransferTable();
// create dummy routes and trips
Route fromRoute = new Route();
fromRoute.setId(new AgencyAndId("agency", "1"));
Trip fromTrip = new Trip();
fromTrip.setId(new AgencyAndId("agency", "1.1"));
fromTrip.setRoute(fromRoute);
Route toRoute = new Route();
toRoute.setId(new AgencyAndId("agency", "2"));
Trip toTrip = new Trip();
toTrip.setId(new AgencyAndId("agency", "2.1"));
toTrip.setRoute(toRoute);
Trip toTrip2 = new Trip();
toTrip2.setId(new AgencyAndId("agency", "2.2"));
toTrip2.setRoute(toRoute);
// find stops
Stop stopK = ((TransitStopArrive) graph.getVertex("agency:K_arrive")).getStop();
Stop stopN = ((TransitStopDepart) graph.getVertex("agency:N_depart")).getStop();
Stop stopM = ((TransitStopDepart) graph.getVertex("agency:M_depart")).getStop();
assertTrue(transferTable.hasPreferredTransfers());
assertEquals(
StopTransfer.UNKNOWN_TRANSFER,
transferTable.getTransferTime(stopN, stopM, fromTrip, toTrip, true));
assertEquals(
StopTransfer.FORBIDDEN_TRANSFER,
transferTable.getTransferTime(stopK, stopM, fromTrip, toTrip, true));
assertEquals(
StopTransfer.PREFERRED_TRANSFER,
transferTable.getTransferTime(stopN, stopK, toTrip, toTrip2, true));
assertEquals(
StopTransfer.TIMED_TRANSFER,
transferTable.getTransferTime(stopN, stopK, fromTrip, toTrip, true));
assertEquals(15, transferTable.getTransferTime(stopN, stopK, fromTrip, toTrip2, true));
TransitStop e_arrive = (TransitStop) graph.getVertex("agency:E");
TransitStop f_depart = (TransitStop) graph.getVertex("agency:F");
Edge edge = new TransferEdge(e_arrive, f_depart, 10000, 10000);
long startTime = TestUtils.dateInSeconds("America/New_York", 2009, 8, 18, 0, 50, 0);
Vertex stop_b = graph.getVertex("agency:B_depart");
Vertex stop_g = graph.getVertex("agency:G_arrive");
RoutingRequest options = new RoutingRequest();
options.dateTime = startTime;
options.setRoutingContext(graph, stop_b, stop_g);
ShortestPathTree spt = aStar.getShortestPathTree(options);
GraphPath path = spt.getPath(stop_g, false);
assertNotNull(path);
assertTrue(
"expected to use much later trip due to min transfer time",
path.getEndTime() - startTime > 4.5 * 60 * 60);
/* cleanup */
e_arrive.removeOutgoing(edge);
f_depart.removeIncoming(edge);
}
@Override
public void buildGraph(Graph graph, HashMap<Class<?>, Object> extra) {
final Parser parser[] = new Parser[] {new Parser()};
GeometryFactory geometryFactory = GeometryUtils.getGeometryFactory();
EarliestArrivalSPTService earliestArrivalSPTService = new EarliestArrivalSPTService();
earliestArrivalSPTService.maxDuration = (maxDuration);
for (TransitStop ts : Iterables.filter(graph.getVertices(), TransitStop.class)) {
// Only link street linkable stops
if (!ts.isStreetLinkable()) continue;
LOG.trace("linking stop '{}' {}", ts.getStop(), ts);
// Determine the set of pathway/transfer destinations
Set<TransitStop> pathwayDestinations = new HashSet<TransitStop>();
for (Edge e : ts.getOutgoing()) {
if (e instanceof PathwayEdge || e instanceof SimpleTransfer) {
if (e.getToVertex() instanceof TransitStop) {
TransitStop to = (TransitStop) e.getToVertex();
pathwayDestinations.add(to);
}
}
}
int n = 0;
RoutingRequest routingRequest = new RoutingRequest(TraverseMode.WALK);
routingRequest.clampInitialWait = (0L);
routingRequest.setRoutingContext(graph, ts, null);
routingRequest.rctx.pathParsers = parser;
ShortestPathTree spt = earliestArrivalSPTService.getShortestPathTree(routingRequest);
if (spt != null) {
for (State state : spt.getAllStates()) {
Vertex vertex = state.getVertex();
if (ts == vertex) continue;
if (vertex instanceof TransitStop) {
TransitStop other = (TransitStop) vertex;
if (!other.isStreetLinkable()) continue;
if (pathwayDestinations.contains(other)) {
LOG.trace("Skipping '{}', {}, already connected.", other.getStop(), other);
continue;
}
double distance = 0.0;
GraphPath graphPath = new GraphPath(state, false);
CoordinateArrayListSequence coordinates = new CoordinateArrayListSequence();
for (Edge edge : graphPath.edges) {
if (edge instanceof StreetEdge) {
LineString geometry = edge.getGeometry();
if (geometry != null) {
if (coordinates.size() == 0) {
coordinates.extend(geometry.getCoordinates());
} else {
coordinates.extend(geometry.getCoordinates(), 1);
}
}
distance += edge.getDistance();
}
}
if (coordinates.size() < 2) { // Otherwise the walk step generator breaks.
ArrayList<Coordinate> coordinateList = new ArrayList<Coordinate>(2);
coordinateList.add(graphPath.states.get(1).getVertex().getCoordinate());
State lastState = graphPath.states.getLast().getBackState();
coordinateList.add(lastState.getVertex().getCoordinate());
coordinates = new CoordinateArrayListSequence(coordinateList);
}
LineString geometry =
geometryFactory.createLineString(
new PackedCoordinateSequence.Double(coordinates.toCoordinateArray()));
LOG.trace(" to stop: '{}' {} ({}m) [{}]", other.getStop(), other, distance, geometry);
new SimpleTransfer(ts, other, distance, geometry);
n++;
}
}
}
LOG.trace("linked to {} others.", n);
if (n == 0) {
LOG.warn(graph.addBuilderAnnotation(new StopNotLinkedForTransfers(ts)));
}
}
}
