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 package org.drools.planner.core.domain.entity;
 
 import java.util.List;
 
public class PlanningEntitySorter {
    // TODO also keep PlanningEntityDescriptor?
    private Comparator<ObjectdifficultyComparator = null;
    public PlanningEntitySorter() {
    }
    public void setDifficultyComparator(Comparator<ObjectdifficultyComparator) {
        this. = difficultyComparator;
    }
    public void setDifficultyWeightFactory(PlanningEntityDifficultyWeightFactory difficultyWeightFactory) {
        this. = difficultyWeightFactory;
    }
    public boolean isSortDifficultySupported() {
        return  != null ||  != null;
    }
    public void sortDifficultyAscending(Solution solutionList<ObjectplanningEntityList) {
        if ( != null) {
            Collections.sort(planningEntityList);
        } else if ( != null) {
            SortedMap<ComparableObjectplanningEntityMap = new TreeMap<ComparableObject>();
            for (Object planningEntity : planningEntityList) {
                Comparable difficultyWeight = .createDifficultyWeight(solutionplanningEntity);
                Object previous = planningEntityMap.put(difficultyWeightplanningEntity);
                if (previous != null) {
                    throw new IllegalStateException("The planningEntityList contains 2 times the same planningEntity ("
                            + previous + ") and (" + planningEntity + ").");
                }
            }
            planningEntityList.clear();
            planningEntityList.addAll(planningEntityMap.values());
        } else {
            throw new IllegalStateException("Sorting on difficulty is impossible" +
                    " because difficultyComparator and difficultyWeightFactory are null.");
        }
    }
    public void sortDifficultyDescending(Solution solutionList<ObjectplanningEntityList) {
        sortDifficultyAscending(solutionplanningEntityList);
        Collections.reverse(planningEntityList);
    }
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