src/main/java/design/model/course_search/SortByDifficulty.java


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package design.model.course_search;

import java.util.Comparator;
import java.util.List;

/*
 * Concrete strategy for sorting courses by their difficulty rating.
 * Willem Dalton
 */
public class SortByDifficulty implements CourseSorter {

    @Override
    public void sortCourses(List<ICourse> courses) {
        courses.sort(Comparator.comparing(ICourse::getDifficultyRating).reversed()); // hardest to easiest
    }

    @Override
    public boolean isEqual(ICourse a, ICourse b) {
        return a.getDifficultyRating() == b.getDifficultyRating();
    }

    @Override
    public String toString() {
        return "Difficulty";
    }
}