org.optaplanner.examples.curriculumcourse.domain.solver.CourseConflict Maven / Gradle / Ivy

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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 2013 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.curriculumcourse.domain.solver;

import java.io.Serializable;
import java.util.Comparator;
import java.util.Objects;

import org.optaplanner.examples.curriculumcourse.domain.Course;

/**
 * Calculated during initialization, not modified during score calculation.
 */
public class CourseConflict implements Serializable,
        Comparable {

    private static final Comparator COURSE_COMPARATOR = Comparator.comparingLong(Course::getId);
    private static final Comparator COMPARATOR = Comparator
            .comparing(CourseConflict::getLeftCourse, COURSE_COMPARATOR)
            .thenComparing(CourseConflict::getRightCourse, COURSE_COMPARATOR);

    private final Course leftCourse;
    private final Course rightCourse;
    private final int conflictCount;

    public CourseConflict(Course leftCourse, Course rightCourse, int conflictCount) {
        this.leftCourse = leftCourse;
        this.rightCourse = rightCourse;
        this.conflictCount = conflictCount;
    }

    public Course getLeftCourse() {
        return leftCourse;
    }

    public Course getRightCourse() {
        return rightCourse;
    }

    public int getConflictCount() {
        return conflictCount;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final CourseConflict other = (CourseConflict) o;
        return Objects.equals(leftCourse, other.leftCourse) &&
                Objects.equals(rightCourse, other.rightCourse);
    }

    @Override
    public int hashCode() {
        return Objects.hash(leftCourse, rightCourse);
    }

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

    @Override
    public String toString() {
        return leftCourse + " & " + rightCourse;
    }
}