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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.curriculumcourse.domain;

import java.util.Set;

import org.optaplanner.core.api.domain.entity.PlanningEntity;
import org.optaplanner.core.api.domain.entity.PlanningPin;
import org.optaplanner.core.api.domain.variable.PlanningVariable;
import org.optaplanner.examples.common.domain.AbstractPersistable;
import org.optaplanner.examples.curriculumcourse.domain.solver.LectureDifficultyWeightFactory;
import org.optaplanner.examples.curriculumcourse.domain.solver.PeriodStrengthWeightFactory;
import org.optaplanner.examples.curriculumcourse.domain.solver.RoomStrengthWeightFactory;

import com.thoughtworks.xstream.annotations.XStreamAlias;

@PlanningEntity(difficultyWeightFactoryClass = LectureDifficultyWeightFactory.class)
@XStreamAlias("Lecture")
public class Lecture extends AbstractPersistable {

    private Course course;
    private int lectureIndexInCourse;
    private boolean pinned;

    // Planning variables: changes during planning, between score calculations.
    private Period period;
    private Room room;

    public Lecture() {
    }

    public Lecture(int id, Course course, Period period, Room room) {
        super(id);
        this.course = course;
        this.period = period;
        this.room = room;
    }

    public Course getCourse() {
        return course;
    }

    public void setCourse(Course course) {
        this.course = course;
    }

    public int getLectureIndexInCourse() {
        return lectureIndexInCourse;
    }

    public void setLectureIndexInCourse(int lectureIndexInCourse) {
        this.lectureIndexInCourse = lectureIndexInCourse;
    }

    @PlanningPin
    public boolean isPinned() {
        return pinned;
    }

    public void setPinned(boolean pinned) {
        this.pinned = pinned;
    }

    @PlanningVariable(valueRangeProviderRefs = {
            "periodRange" }, strengthWeightFactoryClass = PeriodStrengthWeightFactory.class)
    public Period getPeriod() {
        return period;
    }

    public void setPeriod(Period period) {
        this.period = period;
    }

    @PlanningVariable(valueRangeProviderRefs = { "roomRange" }, strengthWeightFactoryClass = RoomStrengthWeightFactory.class)
    public Room getRoom() {
        return room;
    }

    public void setRoom(Room room) {
        this.room = room;
    }

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

    public Teacher getTeacher() {
        return course.getTeacher();
    }

    public int getStudentSize() {
        return course.getStudentSize();
    }

    public Set getCurriculumSet() {
        return course.getCurriculumSet();
    }

    public Day getDay() {
        if (period == null) {
            return null;
        }
        return period.getDay();
    }

    public int getTimeslotIndex() {
        if (period == null) {
            return Integer.MIN_VALUE;
        }
        return period.getTimeslot().getTimeslotIndex();
    }

    public String getLabel() {
        return course.getCode() + "-" + lectureIndexInCourse;
    }

    @Override
    public String toString() {
        return course + "-" + lectureIndexInCourse;
    }

}