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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 2018 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.flightcrewscheduling.domain;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.temporal.ChronoUnit;
import java.util.Comparator;

import org.optaplanner.examples.common.domain.AbstractPersistable;

public class Flight extends AbstractPersistable implements Comparable {

    private static final Comparator COMPARATOR = Comparator.comparing(Flight::getDepartureUTCDate)
            .thenComparing(Flight::getDepartureAirport)
            .thenComparing(Flight::getDepartureUTCDateTime)
            .thenComparing(Flight::getArrivalAirport)
            .thenComparing(Flight::getArrivalUTCDateTime);

    private String flightNumber;
    private Airport departureAirport;
    private LocalDateTime departureUTCDateTime;
    private Airport arrivalAirport;
    private LocalDateTime arrivalUTCDateTime;

    public Flight() {
    }

    public long getDurationInMinutes() {
        return ChronoUnit.MINUTES.between(departureUTCDateTime, arrivalUTCDateTime);
    }

    public LocalDate getDepartureUTCDate() {
        return departureUTCDateTime.toLocalDate();
    }

    public LocalTime getDepartureUTCTime() {
        return departureUTCDateTime.toLocalTime();
    }

    public LocalDate getArrivalUTCDate() {
        return arrivalUTCDateTime.toLocalDate();
    }

    public LocalTime getArrivalUTCTime() {
        return arrivalUTCDateTime.toLocalTime();
    }

    // TODO return overlapping time to avoid score trap?
    public boolean overlaps(Flight other) {
        return departureUTCDateTime.compareTo(other.arrivalUTCDateTime) < 0
                && other.departureUTCDateTime.compareTo(arrivalUTCDateTime) < 0;
    }

    @Override
    public String toString() {
        return flightNumber + "@" + departureUTCDateTime.toLocalDate();
    }

    // ************************************************************************
    // Simple getters and setters
    // ************************************************************************

    public String getFlightNumber() {
        return flightNumber;
    }

    public void setFlightNumber(String flightNumber) {
        this.flightNumber = flightNumber;
    }

    public Airport getDepartureAirport() {
        return departureAirport;
    }

    public void setDepartureAirport(Airport departureAirport) {
        this.departureAirport = departureAirport;
    }

    public LocalDateTime getDepartureUTCDateTime() {
        return departureUTCDateTime;
    }

    public void setDepartureUTCDateTime(LocalDateTime departureUTCDateTime) {
        this.departureUTCDateTime = departureUTCDateTime;
    }

    public Airport getArrivalAirport() {
        return arrivalAirport;
    }

    public void setArrivalAirport(Airport arrivalAirport) {
        this.arrivalAirport = arrivalAirport;
    }

    public LocalDateTime getArrivalUTCDateTime() {
        return arrivalUTCDateTime;
    }

    public void setArrivalUTCDateTime(LocalDateTime arrivalUTCDateTime) {
        this.arrivalUTCDateTime = arrivalUTCDateTime;
    }

    @Override
    public int compareTo(Flight o) {
        return COMPARATOR.compare(this, o);
    }
}