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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 2020 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.util.Set;
import java.util.SortedSet;

import org.optaplanner.core.api.domain.entity.PlanningEntity;
import org.optaplanner.core.api.domain.variable.InverseRelationShadowVariable;
import org.optaplanner.examples.common.domain.AbstractPersistable;

@PlanningEntity
public class Employee extends AbstractPersistable {

    private String name;
    private Airport homeAirport;

    private Set skillSet;
    private Set unavailableDaySet;

    @InverseRelationShadowVariable(sourceVariableName = "employee")
    private SortedSet flightAssignmentSet;

    public Employee() {
    }

    public boolean hasSkill(Skill skill) {
        return skillSet.contains(skill);
    }

    public boolean isAvailable(LocalDate date) {
        return !unavailableDaySet.contains(date);
    }

    public boolean isFirstAssignmentDepartingFromHome() {
        if (flightAssignmentSet.isEmpty()) {
            return true;
        }
        FlightAssignment firstAssignment = flightAssignmentSet.first();
        // TODO allow taking a taxi, but penalize it with a soft score instead
        return firstAssignment.getFlight().getDepartureAirport() == homeAirport;
    }

    public boolean isLastAssignmentArrivingAtHome() {
        if (flightAssignmentSet.isEmpty()) {
            return true;
        }
        FlightAssignment lastAssignment = flightAssignmentSet.last();
        // TODO allow taking a taxi, but penalize it with a soft score instead
        return lastAssignment.getFlight().getArrivalAirport() == homeAirport;
    }

    public long countInvalidConnections() {
        // TODO Cache this to improve example performance.
        // Especially useful for Constraint Streams, by which this is called multiple times per Employee.
        long count = 0L;
        FlightAssignment previousAssignment = null;
        for (FlightAssignment assignment : flightAssignmentSet) {
            if (previousAssignment != null
                    && previousAssignment.getFlight().getArrivalAirport() != assignment.getFlight().getDepartureAirport()) {
                count++;
            }
            previousAssignment = assignment;
        }
        return count;
    }

    public long getFlightDurationTotalInMinutes() {
        long total = 0L;
        for (FlightAssignment flightAssignment : flightAssignmentSet) {
            total += flightAssignment.getFlightDurationInMinutes();
        }
        return total;
    }

    @Override
    public String toString() {
        return name;
    }

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

    public String getName() {
        return name;
    }

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

    public Airport getHomeAirport() {
        return homeAirport;
    }

    public void setHomeAirport(Airport homeAirport) {
        this.homeAirport = homeAirport;
    }

    public Set getSkillSet() {
        return skillSet;
    }

    public void setSkillSet(Set skillSet) {
        this.skillSet = skillSet;
    }

    public Set getUnavailableDaySet() {
        return unavailableDaySet;
    }

    public void setUnavailableDaySet(Set unavailableDaySet) {
        this.unavailableDaySet = unavailableDaySet;
    }

    public SortedSet getFlightAssignmentSet() {
        return flightAssignmentSet;
    }

    public void setFlightAssignmentSet(SortedSet flightAssignmentSet) {
        this.flightAssignmentSet = flightAssignmentSet;
    }

}