/**
* Finds all egress paths from to coordinate to end stop and adds routers to egressRouter
*
* @param request
* @param egressRouter
*/
private void findEgressPaths(ProfileRequest request, Map<LegMode, StreetRouter> egressRouter) {
// For egress
// TODO: this must be reverse search
for (LegMode mode : request.egressModes) {
StreetRouter streetRouter = new StreetRouter(transportNetwork.streetLayer);
streetRouter.transitStopSearch = true;
streetRouter.dominanceVariable = StreetRouter.State.RoutingVariable.DURATION_SECONDS;
if (egressUnsupportedModes.contains(mode)) {
continue;
}
// TODO: add support for bike sharing
streetRouter.streetMode = StreetMode.valueOf(mode.toString());
streetRouter.profileRequest = request;
streetRouter.timeLimitSeconds = request.getTimeLimit(mode);
if (streetRouter.setOrigin(request.toLat, request.toLon)) {
streetRouter.route();
TIntIntMap stops = streetRouter.getReachedStops();
egressRouter.put(mode, streetRouter);
LOG.info("Added {} edgres stops for mode {}", stops.size(), mode);
} else {
LOG.warn(
"MODE:{}, Edge near the origin coordinate wasn't found. Routing didn't start!", mode);
}
}
}
/**
* Combine the results of several street searches using different modes into a single map It also
* saves with which mode was stop reached into stopModeMap. This map is then used to create
* itineraries in response
*/
private TIntIntMap combineMultimodalRoutingAccessTimes(
Map<LegMode, StreetRouter> routers,
TIntObjectMap<LegMode> stopModeMap,
ProfileRequest request) {
// times at transit stops
TIntIntMap times = new TIntIntHashMap();
// weights at transit stops
TIntIntMap weights = new TIntIntHashMap();
for (Map.Entry<LegMode, StreetRouter> entry : routers.entrySet()) {
int maxTime = 30;
int minTime = 0;
int penalty = 0;
LegMode mode = entry.getKey();
switch (mode) {
case BICYCLE:
maxTime = request.maxBikeTime;
minTime = request.minBikeTime;
penalty = BIKE_PENALTY;
break;
case BICYCLE_RENT:
// TODO this is not strictly correct, bike rent is partly walking
maxTime = request.maxBikeTime;
minTime = request.minBikeTime;
penalty = BIKESHARE_PENALTY;
break;
case WALK:
maxTime = request.maxWalkTime;
break;
case CAR:
// TODO this is not strictly correct, CAR PARK is partly walking
case CAR_PARK:
maxTime = request.maxCarTime;
minTime = request.minCarTime;
penalty = CAR_PENALTY;
break;
}
maxTime *= 60; // convert to seconds
minTime *= 60; // convert to seconds
final int maxTimeFinal = maxTime;
final int minTimeFinal = minTime;
final int penaltyFinal = penalty;
StreetRouter router = entry.getValue();
router
.getReachedStops()
.forEachEntry(
(stop, time) -> {
if (time > maxTimeFinal || time < minTimeFinal) return true;
// Skip stops that can't be used with wheelchairs if wheelchair routing is requested
if (request.wheelchair
&& !transportNetwork.transitLayer.stopsWheelchair.get(stop)) {
return true;
}
int weight = time + penaltyFinal;
// There are penalties for using certain modes, to avoid bike/car trips that are
// only marginally faster
// than walking, so we use weights to decide which mode "wins" to access a
// particular stop.
if (!weights.containsKey(stop) || weight < weights.get(stop)) {
times.put(stop, time);
weights.put(stop, weight);
stopModeMap.put(stop, mode);
}
return true; // iteration should continue
});
}
// we don't want to explore a boatload of access/egress stops. Pick only the closest several
// hundred.
// What this means is that in urban environments you'll get on the bus nearby, in suburban
// environments
// you may walk/bike/drive a very long way.
// NB in testing it's not clear this actually does a lot for performance, maybe 1-1.5s
int stopsFound = times.size();
if (stopsFound > MAX_ACCESS_STOPS) {
TIntList timeList = new TIntArrayList();
times.forEachValue(timeList::add);
timeList.sort();
// This gets last time in timeList
int cutoff =
timeList.get(
MAX_ACCESS_STOPS); // it needs to be same as MAX_ACCESS_STOPS since if there are
// minimally MAX_ACCESS_STOPS + 1 stops the indexes are from
// 0-MAX_ACCESS_STOPS
for (TIntIntIterator it = times.iterator(); it.hasNext(); ) {
it.advance();
if (it.value() > cutoff) it.remove();
}
LOG.warn("{} stops found, using {} nearest", stopsFound, times.size());
} else {
LOG.info("{} stops found", stopsFound);
}
// return the times, not the weights
return times;
}