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Drools Planner optimizes automated planning by combining metaheuristic search algorithms with rule engine powered score calculation. This is the drools-planner-examples module which contains examples on how to use Drools Planner.

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/*
 * Copyright 2010 JBoss Inc
 *
 * 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.drools.planner.examples.curriculumcourse.domain;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.drools.planner.api.domain.solution.PlanningEntityCollectionProperty;
import org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScore;
import org.drools.planner.core.solution.Solution;
import org.drools.planner.examples.common.domain.AbstractPersistable;

@XStreamAlias("CurriculumCourseSchedule")
public class CurriculumCourseSchedule extends AbstractPersistable implements Solution {

    private String name;

    private List teacherList;
    private List curriculumList;
    private List courseList;
    private List dayList;
    private List timeslotList;
    private List periodList;
    private List roomList;

    private List unavailablePeriodPenaltyList;

    private List lectureList;

    private HardAndSoftScore score;

    public String getName() {
        return name;
    }

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

    public List getTeacherList() {
        return teacherList;
    }

    public void setTeacherList(List teacherList) {
        this.teacherList = teacherList;
    }

    public List getCurriculumList() {
        return curriculumList;
    }

    public void setCurriculumList(List curriculumList) {
        this.curriculumList = curriculumList;
    }

    public List getCourseList() {
        return courseList;
    }

    public void setCourseList(List courseList) {
        this.courseList = courseList;
    }

    public List getDayList() {
        return dayList;
    }

    public void setDayList(List dayList) {
        this.dayList = dayList;
    }

    public List getTimeslotList() {
        return timeslotList;
    }

    public void setTimeslotList(List timeslotList) {
        this.timeslotList = timeslotList;
    }

    public List getPeriodList() {
        return periodList;
    }

    public void setPeriodList(List periodList) {
        this.periodList = periodList;
    }

    public List getRoomList() {
        return roomList;
    }

    public void setRoomList(List roomList) {
        this.roomList = roomList;
    }

    public List getUnavailablePeriodPenaltyList() {
        return unavailablePeriodPenaltyList;
    }

    public void setUnavailablePeriodPenaltyList(List unavailablePeriodPenaltyList) {
        this.unavailablePeriodPenaltyList = unavailablePeriodPenaltyList;
    }

    @PlanningEntityCollectionProperty
    public List getLectureList() {
        return lectureList;
    }

    public void setLectureList(List lectureList) {
        this.lectureList = lectureList;
    }

    public HardAndSoftScore getScore() {
        return score;
    }

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

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

    public Collection getProblemFacts() {
        List facts = new ArrayList();
        facts.addAll(teacherList);
        facts.addAll(curriculumList);
        facts.addAll(courseList);
        facts.addAll(dayList);
        facts.addAll(timeslotList);
        facts.addAll(periodList);
        facts.addAll(roomList);
        facts.addAll(unavailablePeriodPenaltyList);
        // Do not add the planning entity's (lectureList) because that will be done automatically
        return facts;
    }

    /**
     * Clone will only deep copy the {@link #lectureList}.
     */
    public CurriculumCourseSchedule cloneSolution() {
        CurriculumCourseSchedule clone = new CurriculumCourseSchedule();
        clone.id = id;
        clone.name = name;
        clone.teacherList = teacherList;
        clone.curriculumList = curriculumList;
        clone.courseList = courseList;
        clone.dayList = dayList;
        clone.timeslotList = timeslotList;
        clone.periodList = periodList;
        clone.roomList = roomList;
        clone.unavailablePeriodPenaltyList = unavailablePeriodPenaltyList;
        List clonedLectureList = new ArrayList(lectureList.size());
        for (Lecture lecture : lectureList) {
            Lecture clonedLecture = lecture.clone();
            clonedLectureList.add(clonedLecture);
        }
        clone.lectureList = clonedLectureList;
        clone.score = score;
        return clone;
    }

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (id == null || !(o instanceof CurriculumCourseSchedule)) {
            return false;
        } else {
            CurriculumCourseSchedule other = (CurriculumCourseSchedule) o;
            if (lectureList.size() != other.lectureList.size()) {
                return false;
            }
            for (Iterator it = lectureList.iterator(), otherIt = other.lectureList.iterator(); it.hasNext();) {
                Lecture lecture = it.next();
                Lecture otherLecture = otherIt.next();
                // Notice: we don't use equals()
                if (!lecture.solutionEquals(otherLecture)) {
                    return false;
                }
            }
            return true;
        }
    }

    public int hashCode() {
        HashCodeBuilder hashCodeBuilder = new HashCodeBuilder();
        for (Lecture lecture : lectureList) {
            // Notice: we don't use hashCode()
            hashCodeBuilder.append(lecture.solutionHashCode());
        }
        return hashCodeBuilder.toHashCode();
    }

}