Re: [rules-users] PlanningVariables are sometimes null
Op 31-08-12 12:33, Michiel Vermandel schreef:
Hi,
I've got an planningEntity with two planningVariables.
For both variables I build a list of objects.
While solving, it seems that the planningEntity objects are sometimes
called without setting the planning variables.
When I read an attribute of such a variable in a rule I get a NPE, ofcourse.
Is it possible to always have the planningsvariables to be set before
executing a rule?
No, because the construction heuristics want to insert all entities in
the WM, before initializing the plannin variables (sometimes only 1 of
out of multiple planning variables per step).
Create a null safe getter:
ShiftAssignment:
public Contract getEmployeeContract() {
return employee == null ? null : employee.getContract();
}
Or am I missing the obvious?
Thanks,
Michiel
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