/**
 * Book.java
 * Jeff Ondich, 17 Feb 2014
 */

import java.lang.Comparable;
import java.util.Collections;
import java.util.ArrayList;
import java.util.Comparator;

public class Book implements Comparable<Book> {
    public String title;
    public String author;

    public Book(String title, String author) {
        this.title = title;
        this.author = author;
    }

    public String getTitle() {
        return this.title;
    }

    public String getAuthor() {
        return this.author;
    }

    public int compareTo(Book other) {
        int comparison = this.title.compareTo(other.title);
        if (comparison != 0) {
            return comparison;
        }

        return this.author.compareTo(other.author);
    }

    public static final Comparator<Book> titleComparator = new Comparator<Book>() {
                    public int compare(Book a, Book b) {
                        return a.title.compareTo(b.title);
                    }
                };

    public static final Comparator<Book> authorComparator = new Comparator<Book>() {
                    public int compare(Book a, Book b) {
                        return a.author.compareTo(b.author);
                    }
                };

    public static void main(String[] args) {
        ArrayList<Book> bookList = new ArrayList<Book>();
        bookList.add(new Book("Life on the Mississippi", "Twain"));
        bookList.add(new Book("Emma", "Austen"));
        bookList.add(new Book("A Wild Sheep Chase", "Murakami"));
        bookList.add(new Book("Great Expectations", "Acker"));
        bookList.add(new Book("Great Expectations", "Dickens"));
        bookList.add(new Book("To Say Nothing of the Dog", "Willis"));
        bookList.add(new Book("Tinker, Tailor, Soldier, Spy", "Le Carré"));

        System.out.println("==== Books by default comparison ====");
        Collections.sort(bookList);
        for (Book book : bookList) {
            System.out.format("%s, by %s\n", book.getTitle(), book.getAuthor());
        }
        System.out.println("");

        System.out.println("==== Books by title ====");
        Collections.sort(bookList, Book.titleComparator);
        for (Book book : bookList) {
            System.out.format("%s, by %s\n", book.getTitle(), book.getAuthor());
        }
        System.out.println("");

        System.out.println("==== Books by author ====");
        Collections.sort(bookList, Book.authorComparator);
        for (Book book : bookList) {
            System.out.format("%s, by %s\n", book.getTitle(), book.getAuthor());
        }
        System.out.println("");
    }
}