private void cleanSchedule() {
   for (TransitLine line : this.schedule.getTransitLines().values()) {
     Set<TransitRoute> toRemove = new HashSet<>();
     for (TransitRoute transitRoute : line.getRoutes().values()) {
       boolean removeRoute = false;
       NetworkRoute networkRoute = transitRoute.getRoute();
       if (networkRoute.getStartLinkId() == null || networkRoute.getEndLinkId() == null) {
         removeRoute = true;
       }
       for (Id<Link> linkId : transitRoute.getRoute().getLinkIds()) {
         if (linkId == null) {
           removeRoute = true;
         }
       }
       if (removeRoute) {
         log.error(
             "NetworkRoute for " + transitRoute.getId().toString() + " incomplete. Remove route.");
         toRemove.add(transitRoute);
       }
     }
     if (!toRemove.isEmpty()) {
       for (TransitRoute transitRoute : toRemove) {
         line.removeRoute(transitRoute);
       }
     }
   }
 }
  /**
   * By applying a routing algorithm (e.g. shortest path or OSM-extraction) route from station to
   * station for each pt-line.
   *
   * <p>Writes the resulting schedule into this.schedule.
   */
  protected void createPTRoutes() {
    log.info("Creating pt routes...");

    Counter counter = new Counter("route # ");
    this.router = new PTLRFastAStarLandmarksSimpleRouting(this.network);
    for (TransitLine line : this.schedule.getTransitLines().values()) {
      for (TransitRoute route : line.getRoutes().values()) {
        counter.incCounter();
        assignRoute(route);
      }
    }
    counter.printCounter();

    log.info("  Add artificial links and nodes...");
    for (ArtificiallyConnectedStopFacility newFacility :
        artificiallyConnectedStopFacilities.values()) {
      this.network.addNode(newFacility.myNode);
    }
    for (ArtificiallyConnectedStopFacility newFacility :
        artificiallyConnectedStopFacilities.values()) {
      this.network.addLink(newFacility.myLink);
      for (Link newLink : newFacility.getLinks()) {
        this.network.addLink(newLink);
      }
    }
    for (Link newLink : artificiallyAddedLinks.values()) {
      this.network.addLink(newLink);
    }
    log.info("  Add artificial links and nodes... done.");

    log.info("Creating pt routes... done.");
  }
 private void removeNonUsedStopFacilities() {
   // Collect all used stop facilities:
   Set<Id<TransitStopFacility>> usedStopFacilities = new HashSet<>();
   for (TransitLine line : this.schedule.getTransitLines().values()) {
     for (TransitRoute route : line.getRoutes().values()) {
       for (TransitRouteStop stop : route.getStops()) {
         usedStopFacilities.add(stop.getStopFacility().getId());
       }
     }
   }
   // Check all stop facilities if not used:
   Set<TransitStopFacility> unusedStopFacilites = new HashSet<>();
   for (Id<TransitStopFacility> facilityId : this.schedule.getFacilities().keySet()) {
     if (!usedStopFacilities.contains(facilityId)) {
       unusedStopFacilites.add(this.schedule.getFacilities().get(facilityId));
     }
   }
   // Remove all stop facilities not used:
   for (TransitStopFacility facility : unusedStopFacilites) {
     this.schedule.removeStopFacility(facility);
   }
 }
 /**
  * Add to any link that is passed by any route a "pt" in the modes, if it hasn't already one...
  */
 private void prepareNetwork() {
   Map<Id<Link>, ? extends Link> networkLinks = network.getLinks();
   Set<Id<Link>> transitLinks = new HashSet<>();
   for (TransitLine line : this.schedule.getTransitLines().values()) {
     for (TransitRoute transitRoute : line.getRoutes().values()) {
       NetworkRoute networkRoute = transitRoute.getRoute();
       transitLinks.add(networkRoute.getStartLinkId());
       for (Id<Link> linkId : transitRoute.getRoute().getLinkIds()) {
         transitLinks.add(linkId);
       }
       transitLinks.add(networkRoute.getEndLinkId());
     }
   }
   for (Id<Link> transitLinkId : transitLinks) {
     Link transitLink = networkLinks.get(transitLinkId);
     if (!transitLink.getAllowedModes().contains(TransportMode.pt)) {
       Set<String> modes = new HashSet<>();
       modes.addAll(transitLink.getAllowedModes());
       modes.add(TransportMode.pt);
       transitLink.setAllowedModes(modes);
     }
   }
 }