Update EstimationRoutingModule.java

When no DRT suitable DRT is found, the route will be null. We need to be able to handle this situation.
matsim-org · Mar 13, 2024 · 0ad7c9f · 0ad7c9f
1 parent 9d5e32b
commit 0ad7c9f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/contribs/drt/src/main/java/org/matsim/contrib/drt/estimator/EstimationRoutingModule.java b/contribs/drt/src/main/java/org/matsim/contrib/drt/estimator/EstimationRoutingModule.java
@@ -26,6 +26,11 @@ public List<? extends PlanElement> calcRoute(RoutingRequest request) {
 
 		List<? extends PlanElement> route = delegate.calcRoute(request);
 
+		if (route == null) {
+			// no suitable DRT connection found (e.g., can't find DRT stops nearby), will fall back to walk mode.
+			return null;
+		}
+
 		for (PlanElement el : route) {
 			if (el instanceof Leg leg) {
 				if (leg.getRoute() instanceof DrtRoute drtRoute) {