org.opentripplanner.routing.services.RealtimeVehiclePositionService Maven / Gradle / Ivy
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package org.opentripplanner.routing.services;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.opentripplanner.model.vehicle_position.RealtimeVehiclePosition;
import org.opentripplanner.transit.model.network.TripPattern;
public class RealtimeVehiclePositionService {
private final Map> positions = new ConcurrentHashMap<>();
/**
* For the given pattern set all realtime vehicle positions.
*
* The list is expected to be exhaustive: all existing positions will be overridden.
*
* This means that if there are two updaters providing positions for the same pattern they
* overwrite each other.
*/
public void setVehiclePositions(TripPattern pattern, List updates) {
positions.put(pattern, List.copyOf(updates));
}
/**
* Remove all vehicle positions for a given pattern.
*
* This is useful to clear old vehicles for which there are no more updates and we assume that
* they have stopped their trip.
*/
public void clearVehiclePositions(TripPattern pattern) {
positions.remove(pattern);
}
/**
* Get the vehicle positions for a certain trip.
*/
public List getVehiclePositions(TripPattern pattern) {
// the list is made immutable during insertion, so we can safely return them
return positions.getOrDefault(pattern, List.of());
}
}