Changing filed on chained planning entity

[Gvozden Marinkovic]

Is it possible to change filed on chained planning entity. I am developing 3d bin packing, emulating real case scenario. I designed custom moves, for box insertion. Depending on order I am calculating possible positions to reduce problem size. 

What I need is to set rotation and top left corner on planning entity, as a part of move.

Thank you in advance,

Gvozden

[Gvozden Marinkovic]

 I chaned PlanningEntity classes, so rotation (axis), corner and locked flag are genuine variables now (not shadow).

Construction heuristics works, change move also, but Swap move (which needs to swap unlocked boxes does not work).

java.lang.NullPointerException: null

   at org.optaplanner.core.impl.heuristic.selector.move.generic.chained.ChainedSwapMove.<init>(ChainedSwapMove.java:43) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

 at org.optaplanner.core.impl.heuristic.selector.move.generic.SwapMoveSelector$2.newSwapSelection(SwapMoveSelector.java:151) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

  at org.optaplanner.core.impl.heuristic.selector.move.generic.SwapMoveSelector$2.newSwapSelection(SwapMoveSelector.java:148) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

  at org.optaplanner.core.impl.heuristic.selector.common.iterator.AbstractRandomSwapIterator.createUpcomingSelection(AbstractRandomSwapIterator.java:58) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

       at org.optaplanner.core.impl.heuristic.selector.common.iterator.UpcomingSelectionIterator.hasNext(UpcomingSelectionIterator.java:43) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

 at org.optaplanner.core.impl.heuristic.selector.move.composite.UnionMoveSelector$RandomUnionMoveIterator.refreshMoveIteratorMap(UnionMoveSelector.java:192) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

  at org.optaplanner.core.impl.heuristic.selector.move.composite.UnionMoveSelector$RandomUnionMoveIterator.hasNext(UnionMoveSelector.java:166) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

 at org.optaplanner.core.impl.localsearch.decider.LocalSearchDecider.decideNextStep(LocalSearchDecider.java:108) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

      at org.optaplanner.core.impl.localsearch.DefaultLocalSearchPhase.solve(DefaultLocalSearchPhase.java:71) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

      at org.optaplanner.core.impl.solver.AbstractSolver.runPhases(AbstractSolver.java:99) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

 at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:189) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

      at org.optaplanner.core.impl.solver.DefaultSolverJob.call(DefaultSolverJob.java:101) ~[optaplanner-core-7.38.0.Final.jar:7.38.0.Final]

 at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_201]

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_201]

     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_201]

     at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201]

solver.xml

<localSearch>

    <unionMoveSelector>

        <changeMoveSelector>

            <valueSelector variableName="topLeftCorner"/>

            <filterClass>rs.plusplusnt.mario.planner.filters.CornerFilter</filterClass>

        </changeMoveSelector>

        <changeMoveSelector>

            <valueSelector variableName="axisPosition"/>

            <filterClass>rs.plusplusnt.mario.planner.filters.RotateFilter</filterClass>

        </changeMoveSelector>

        <changeMoveSelector>

            <valueSelector variableName="locked"/>

            <filterClass>rs.plusplusnt.mario.planner.filters.LockFilter</filterClass>

        </changeMoveSelector>

        <swapMoveSelector/>

    </unionMoveSelector>

</localSearch>

@PlanningEntity

public interface Allocation extends Allocation3D {

   Container getContainer();

    Boolean getLocked();

   List<Coordinate> getNextPackagePossibleCornerPositions();

    @InverseRelationShadowVariable(sourceVariableName = "previousAllocation")

   Package getNextPackage();

   void setNextPackage(Package nextPackage);

}

@PlanningEntity(difficultyComparatorClass = BoxDifficultyComparator.class)

public class Package implements Allocation {

   private Box box;

   private List<Coordinate> possibleCornerPositions;

   private Boolean locked = false;

   private AxisPosition axisPosition = AxisPosition.DEFAULT;

   private Coordinate topLeftCorner = Coordinate.center();

   private Allocation previousAllocation;

   /* shadow*/

   private Box allocatedBox;

   private Container container;

   private Package nextPackage;

   private List<Coordinate> nextPackagePossibleCornerPositions = Collections.singletonList(Coordinate.center());

   

   @Override

   @PlanningId

   public Long getId() {

       return box.getId();

   }

   @Override

   @AnchorShadowVariable(sourceVariableName = "previousAllocation")

   public Container getContainer() {

       return container;

   }

   @PlanningVariable(valueRangeProviderRefs = {"containersRange", "packagesRange"},

           graphType = PlanningVariableGraphType.CHAINED)

   public Allocation getPreviousAllocation() {

       return previousAllocation;

   }

   @InverseRelationShadowVariable(sourceVariableName = "previousAllocation")

   public Package getNextPackage() {

       return nextPackage;

   }

   @PlanningVariable(valueRangeProviderRefs = {"axisRange"})

   public AxisPosition getAxisPosition() {

       return axisPosition;

   }

   @PlanningVariable(valueRangeProviderRefs = {"cornerPositionRange"})

   public Coordinate getTopLeftCorner() {

       return topLeftCorner;

   }

   @ValueRangeProvider(id = "cornerPositionRange")

   public List<Coordinate> possibleCornerPositions() {

       if (previousAllocation != null && previousAllocation.getLocked()) {

           return previousAllocation.getNextPackagePossibleCornerPositions();

       }

        return possibleCornerPositions;

   }

   @ValueRangeProvider(id = "axisRange")

   public List<AxisPosition> possibleAxisPositions() {

       return box.getPossibleAxisPositions();

   }

   @CustomShadowVariable(variableListenerClass = PackagePositionChangeListener.class,

           sources = {@PlanningVariableReference(variableName = "topLeftCorner"),

                   @PlanningVariableReference(variableName = "axisPosition")})

   public Box getAllocatedBox() {

       return allocatedBox;

   }

   @PlanningPin

   @PlanningVariable(valueRangeProviderRefs = {"lockedRange"})

   public Boolean getLocked() {

       return locked;

   }

   @CustomShadowVariable(variableListenerClass = PackagePositionChangeListener.class,

            sources = {@PlanningVariableReference(variableName = "locked")})

   public List<Coordinate> getNextPackagePossibleCornerPositions() {

       return nextPackagePossibleCornerPositions;

   }

}

[Geoffrey De Smet]

Try filtering the variableNames for the swap move selector

<localSearch>
  <unionMoveSelector>
   <changeMoveSelector/>
   <swapMoveSelector>
     <variableName>...</>
   </>
</>

See docs chapter on move selection

With kind regards,
Geoffrey De Smet

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[Gvozden Marinkovic]

Thank you Geoffrey Swap is working now ... Struggle can begin ...

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