[rules-users] NullPointerException when calling ScoreDirector.beforeEntityAdded with new Vehicle

[Hagai]

Using OptaPlanner 6.0.1.Final with problem like vehiclerouting.

In vehiclerouting the Vehicle and Customer are both planning entities. They
both implements the Standstill interface that is annotated with
@PlanningEntity and their collections are annotated with
@PlanningEntityCollectionProperty on the solution class.

Flowing the code of VehicleRoutingPanel.insertLocationAndCustomer to insert
a new Vehicle to the solution, my code is failing when the new Vehicle is
reported to the score director:
scoreDirector.beforeEntityAdded(newVehicle);

The exception is NullPointerException at
org.optaplanner.core.impl.domain.variable.listener.PlanningVariableListenerSupport.beforeEntityAdded(PlanningVariableListenerSupport.java:54)

It looks like the PlanningVariableListenerSupport.entityVariableListenerMap
does not have item for the Vehicle entity, there is only one item for the
Customer entity in this map.

I get the same problem when calling ScoreDirector.beforeEntityRemoved to
remove a Vehicle.

Is this a bug or do I need to handle Vehicle entities differently?



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