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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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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.optaplanner.examples.coachshuttlegathering.domain.location;

import java.util.Map;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import org.optaplanner.examples.common.domain.AbstractPersistable;

@XStreamAlias("CsgRoadLocation")
public class RoadLocation extends AbstractPersistable {

    protected double latitude;
    protected double longitude;

    protected Map travelDistanceMap;

    public RoadLocation() {
    }

    public RoadLocation(long id, double latitude, double longitude) {
        super(id);
        this.latitude = latitude;
        this.longitude = longitude;
    }

    public double getLatitude() {
        return latitude;
    }

    public void setLatitude(double latitude) {
        this.latitude = latitude;
    }

    public double getLongitude() {
        return longitude;
    }

    public void setLongitude(double longitude) {
        this.longitude = longitude;
    }

    public Map getTravelDistanceMap() {
        return travelDistanceMap;
    }

    public void setTravelDistanceMap(Map travelDistanceMap) {
        this.travelDistanceMap = travelDistanceMap;
    }

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

    public int getCoachDistanceTo(RoadLocation location) {
        return travelDistanceMap.get(location).getCoachDistance();
    }

    public int getCoachDurationTo(RoadLocation location) {
        return travelDistanceMap.get(location).getCoachDuration();
    }

    public int getShuttleDistanceTo(RoadLocation location) {
        return travelDistanceMap.get(location).getShuttleDistance();
    }

    public int getShuttleDurationTo(RoadLocation location) {
        return travelDistanceMap.get(location).getShuttleDuration();
    }

    public int getMaximumDistanceTo(RoadLocation location) {
        RoadLocationArc locationArc = travelDistanceMap.get(location);
        return Math.max(locationArc.getCoachDistance(), locationArc.getShuttleDistance());
    }

    public double getAirDistanceDouble(RoadLocation location) {
        // Implementation specified by TSPLIB http://www2.iwr.uni-heidelberg.de/groups/comopt/software/TSPLIB95/
        // Euclidean distance (Pythagorean theorem) - not correct when the surface is a sphere
        double latitudeDifference = location.latitude - latitude;
        double longitudeDifference = location.longitude - longitude;
        return Math.sqrt(
                (latitudeDifference * latitudeDifference) + (longitudeDifference * longitudeDifference));
    }

    /**
     * The angle relative to the direction EAST.
     * @param location never null
     * @return in Cartesian coordinates
     */
    public double getAngle(RoadLocation location) {
        // Euclidean distance (Pythagorean theorem) - not correct when the surface is a sphere
        double latitudeDifference = location.latitude - latitude;
        double longitudeDifference = location.longitude - longitude;
        return Math.atan2(latitudeDifference, longitudeDifference);
    }

}