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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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package org.optaplanner.examples.tsp.domain;

import java.text.NumberFormat;
import java.util.Collections;
import java.util.List;

import org.optaplanner.core.api.domain.solution.PlanningEntityCollectionProperty;
import org.optaplanner.core.api.domain.solution.PlanningScore;
import org.optaplanner.core.api.domain.solution.PlanningSolution;
import org.optaplanner.core.api.domain.solution.ProblemFactCollectionProperty;
import org.optaplanner.core.api.domain.solution.ProblemFactProperty;
import org.optaplanner.core.api.domain.valuerange.ValueRangeProvider;
import org.optaplanner.core.api.score.buildin.simplelong.SimpleLongScore;
import org.optaplanner.examples.common.domain.AbstractPersistable;
import org.optaplanner.examples.tsp.domain.location.DistanceType;
import org.optaplanner.examples.tsp.domain.location.Location;

import com.fasterxml.jackson.annotation.JsonIgnore;

@PlanningSolution
public class TspSolution extends AbstractPersistable {

    private String name;
    protected DistanceType distanceType;
    protected String distanceUnitOfMeasurement;
    private List locationList;
    private Domicile domicile;

    private List visitList;

    private SimpleLongScore score;

    public TspSolution() {
    }

    public TspSolution(long id) {
        super(id);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public DistanceType getDistanceType() {
        return distanceType;
    }

    public void setDistanceType(DistanceType distanceType) {
        this.distanceType = distanceType;
    }

    public String getDistanceUnitOfMeasurement() {
        return distanceUnitOfMeasurement;
    }

    public void setDistanceUnitOfMeasurement(String distanceUnitOfMeasurement) {
        this.distanceUnitOfMeasurement = distanceUnitOfMeasurement;
    }

    @ProblemFactCollectionProperty
    public List getLocationList() {
        return locationList;
    }

    public void setLocationList(List locationList) {
        this.locationList = locationList;
    }

    @ProblemFactProperty
    public Domicile getDomicile() {
        return domicile;
    }

    public void setDomicile(Domicile domicile) {
        this.domicile = domicile;
    }

    @PlanningEntityCollectionProperty
    @ValueRangeProvider
    public List getVisitList() {
        return visitList;
    }

    public void setVisitList(List visitList) {
        this.visitList = visitList;
    }

    @PlanningScore
    public SimpleLongScore getScore() {
        return score;
    }

    public void setScore(SimpleLongScore score) {
        this.score = score;
    }

    // ************************************************************************
    // Complex methods
    // ************************************************************************

    @ValueRangeProvider
    @JsonIgnore
    public List getDomicileRange() {
        return Collections.singletonList(domicile);
    }

    @JsonIgnore
    public String getDistanceString(NumberFormat numberFormat) {
        if (score == null) {
            return null;
        }
        long distance = -score.score();
        if (distanceUnitOfMeasurement == null) {
            return numberFormat.format(distance / 1000.0);
        }
        switch (distanceUnitOfMeasurement) {
            case "sec": // TODO why are the values 1000 larger?
                long hours = distance / 3600000;
                long minutes = distance % 3600000 / 60000;
                long seconds = distance % 60000 / 1000;
                long milliseconds = distance % 1000;
                return hours + "h " + minutes + "m " + seconds + "s " + milliseconds + "ms";
            case "km": { // TODO why are the values 1000 larger?
                long km = distance / 1000;
                long meter = distance % 1000;
                return km + "km " + meter + "m";
            }
            case "meter": {
                long km = distance / 1000;
                long meter = distance % 1000;
                return km + "km " + meter + "m";
            }
            default:
                return numberFormat.format(distance / 1000.0) + " " + distanceUnitOfMeasurement;
        }
    }

}