Je suis face à un NPE en essayant de résoudre ma solution:exception Nullpointer dans CompositePlanningValueRangeDescriptor.extractValues
Exception in thread "main" java.lang.NullPointerException
at java.util.ArrayList.addAll(ArrayList.java:472)
at org.drools.planner.core.domain.variable.CompositePlanningValueRangeDescriptor.extractValues(CompositePlanningValueRangeDescriptor.java:46)
at org.drools.planner.core.domain.variable.PlanningVariableDescriptor.extractPlanningValues(PlanningVariableDescriptor.java:259)
at org.drools.planner.core.heuristic.selector.variable.PlanningValueSelector.initSelectedPlanningValueList(PlanningValueSelector.java:91)
at org.drools.planner.core.heuristic.selector.variable.PlanningValueSelector.phaseStarted(PlanningValueSelector.java:73)
at org.drools.planner.core.heuristic.selector.variable.PlanningValueWalker.phaseStarted(PlanningValueWalker.java:64)
at org.drools.planner.core.heuristic.selector.variable.PlanningVariableWalker.phaseStarted(PlanningVariableWalker.java:62)
at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.phaseStarted(DefaultGreedyDecider.java:62)
at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:112)
at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57)
at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
at de.haw.dsms.applicationcore.planning.BalancingApp.main(BalancingApp.java:47)
J'ai annoté mon entité de planification avec les annotations suivantes pour collecter la plage de valeurs à partir de deux listes dans la solution :
@PlanningEntity
public class ScheduleItem implements Cloneable{
private ChangeOfferEvent item;
@PlanningVariable()
@ValueRanges({
@ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, solutionProperty = "offers"),
@ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, solutionProperty = "dummies")
})
public ChangeOfferEvent getItem() {
return item;
}
public void setItem(ChangeOfferEvent item) {
this.item = item;
}
public ScheduleItem() {
this.item = null;
}
...
Ceci est la solution:
public class ProductionConsumptionBalancing implements Solution<HardAndSoftLongScore> {
/*
* Problem facts
*/
// The grid entity offers
private List<ChangeOfferEvent> offers;
// Placeholder events to represent "not used schedule items"
private List<PlaceholderOfferEvent> dummies;
// The total energy consumption in the grid
// [Watt]
private TotalEnergyConsumption totalElectricityConsumption;
// The total energy production in the grid
// [Watt]
private TotalEnergyProduction totalElectricityProduction;
public List<ChangeOfferEvent> getOffers() {
return offers;
}
public void setOffers(List<ChangeOfferEvent> offers) {
this.offers = offers;
}
public List<PlaceholderOfferEvent> getDummies() {
return dummies;
}
public void setDummies(List<PlaceholderOfferEvent> dummies) {
this.dummies = dummies;
}
public TotalEnergyConsumption getTotalElectricityConsumption() {
return totalElectricityConsumption;
}
public void setTotalElectricityConsumption(
TotalEnergyConsumption totalElectricityConsumption) {
this.totalElectricityConsumption = totalElectricityConsumption;
}
public TotalEnergyProduction getTotalElectricityProduction() {
return totalElectricityProduction;
}
public void setTotalElectricityProduction(
TotalEnergyProduction totalElectricityProduction) {
this.totalElectricityProduction = totalElectricityProduction;
}
/*
* Problem entities
*/
private List<ScheduleItem> schedule;
@PlanningEntityCollectionProperty
public List<ScheduleItem> getSchedule() {
return schedule;
}
public void setSchedule(List<ScheduleItem> schedule) {
this.schedule = schedule;
}
...
La chose étrange à propos de ceci est que pendant le débogage, j'ai découvert que c'est le paramètre "planningEntity" qui est nul et non les valeurs dans la solution.
Est-ce que quelqu'un rencontre le même problème ou sait comment résoudre ce problème?
Merci et meilleures salutations!
PS: Il semble que cela vient de la méthode initSelectedPlanningValueList:
private void initSelectedPlanningValueList(AbstractSolverPhaseScope phaseScope) {
90 if (planningVariableDescriptor.isPlanningValuesCacheable()) {
91 Collection<?> planningValues = planningVariableDescriptor.extractPlanningValues(
92 phaseScope.getWorkingSolution(), null);
93 cachedPlanningValues = applySelectionOrder(planningValues);
94 } else {
95 cachedPlanningValues = null;
96 }
97 }
PSPS: Problème résolu. Le problème est apparu parce que j'ai oublié de lier l'attribut du dummies du clone à la liste des mannequins d'origine. Donc, la liste des nuls dans la solution clonée était nulle.
@Override
public Solution<HardAndSoftLongScore> cloneSolution() {
ProductionConsumptionBalancing clone = new ProductionConsumptionBalancing();
// Transfer consumption and production values
clone.totalElectricityConsumption = this.totalElectricityConsumption;
clone.totalElectricityProduction = this.totalElectricityProduction;
// Shallow copy offer lists (shouldn't change)
clone.offers = this.offers;
// Shallow copy of dummy list
clone.dummies = this.dummies;
// Deep copy schedule
...
Quelle version de Drools Planner (= OptaPlanner)? –