EIS.deleteAssociation() returns null in some cases

[koenhindriks]

When you call EIS.deleteAssociation(entity) where entity HAS NO associations, the call returns null instead of the expected empty list.

This causes a nullpointer exception when you kill an environment with un-associated entities.

reproduce:

• run elevator with four elevators but assign only 3 (default in elevator.mas file)
• kill the mas.

[Wouter1]

Please clarify. EIS is only an interface and does not return anything. Are you referring to the Default implementation?

[Wouter1]

I followed the procedure above with SimpleIDE, but I do not see any exceptions

Received new entity named car2.
WARNING: WARNING: None of the launch rules in the MAS applies for entity car2 of type car because maximum number of times rules can be applied has been reached
WARNING: WARNING: Failed to get percepts from environment.
 because environment does not run but is paused.WARNING: WARNING: Failed to get percepts from environment.
 because environment does not run but is paused.Shutting down MAS.
Messages->Runtime stopped.
Runtime->Messages stopped.
GOAL agent elevator terminated successfully.
GOAL agent elevator terminated successfully.
GOAL agent elevator_0 terminated successfully.
GOAL agent elevator_0 terminated successfully.
Environment->Messages stopped.
Messages->Environment stopped.
done.
The multi-agent system elevator.mas2g has been terminated.