Re: [rules-users] Drools Planner: what if possible values of a PlanningVariable are dependent of another one?

Im dealing with the almost the same problem as the original poster. The only difference is that the subset of entity specific variables and the total amount of possible variables spread over all entity specific variables has a factor of up to 24 in between them. This combined with the amount of enities makes it a huge increase in total amount of possibilities. This gives me the feeling that using the evaluation class wastes a lot of time evaluation solution which would never be viable. Since the original post is 1 and a half years old and a lot of new versions have been released since then, I was wondering if the same solution applies to my problem aswell and how it compares to my solution which i described below. At the moment i solved it as follows: PlanningEntity A has the following @PlanningVariable annotation a class x where the @ValueRangeProvider of x is provided by the @PlanningSolution annotated class. a class y where the @ValueRangeProvider uses x to provide the subset of classes y if x is not null, otherwise it returns an empty list<Y> (code below) @ValueRangeProvider(id = "timePeriods") public List<Period> getTimePeriods(){ ScheduleBlock s = getScheduleBlock(); if(s == null) { return new ArrayList<Period>(); } return getScheduleBlock().getTimePeriods(); } This feels like a hack/workaround for the problem but feel free to let me know what you think,

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