Complete the implementations of various classes in a bookStore. Read the API for bookStore carefully, the API of this lab is available under doc folder in the Java project folder (docindex.html). Some example tests are given to you in the Testerv3 class. We consider a database that stores information about books and owners. Each book has (e.g., String title, int price, int yearPublished), whereas BookStoreOwner has (String name and long id). You must implement all methods in the BookStore. For this question, you are required to submit Java files such as Book, BookStore, BookStoreOwner, SortBooksbyYear in your Eclipse project.

Bookstore.java

package bookStore;

/** * A class representing a book store that has an * owner . A book store owns a collection (or possibly * collections) of books, but does not own the books themselves * . * *

* Only the owner of the book store is able to sell books from the book store. * The book store does NOT own its owner . *

*/

import java.util.*; public class BookStore { /* * YOU NEED A FIELD HERE TO HOLD THE Book OF THIS BookStore */

private TreeMap books; private BookStoreOwner owner;

/** * Initializes this book store so that it has the specified owner and no * books. * * @param owner the owner of this book store */ public BookStore(BookStoreOwner owner) { // COMPLETE THIS

}

/** * Initializes this book store by copying another book store. This book store will * have the same owner and the same number and type of books as the other * book store. * * @param other the book store to copy */ public BookStore(BookStore other) { // COMPLETE THIS

}

/** * Returns the owner of this book store. * *

* This method is present only for testing purposes. Returning the owner of this * book store allows any user to sell books from the book store (because any * user can become the owner of this book store)! * * @return the owner of this book store */ public BookStoreOwner getOwner() { // ALREADY IMPLEMENTED; DO NOT MODIFY return this.owner; }

/** * Allows the current owner of this book store to give this book store to a new * owner. * * @param currentOwner the current owner of this book store * @param newOwner the new owner of this book store * @throws IllegalArgumentException if currentOwner reference is not the reference of the * current owner of this book store */ public void changeOwner(BookStoreOwner currentOwner, BookStoreOwner newOwner) {

// COMPLETE THIS

}

/** * Adds the specified books to this book store. * * @param books a list of books to add to this book store */ public void add(List books) { // COMPLETE THIS

}

/** * Returns true if this book store contains the specified book, and false * otherwise. * * @param book a book * @return true if this book store contains the specified book, and false * otherwise */ public boolean contains(Book book) {

// COMPLETE THIS

}

/** * Allows the owner of this book store to sell a single book equal to the * specified book from this book store. * *

* If the specified user is not equal to the owner of this book store, then the * book is not sold from this book store, and null is returned. * * @param user the person trying to sell the book * @param book a book * @return a book equal to the specified book from this book store, or null * if user is not the owner of this book store @pre. the book store * contains a book equal to the specified book */ public Book sellingsingleBook(BookStoreOwner user, Book book) {

// COMPLETE THIS

}

/** * Allows the owner of this book store to sell the smallest number of books * whose total price value in dollars is equal or less than to the specified * price value in dollars. Try from the most expensive book and you may want * to use descendingKeySet() method. * *

* Returns the empty list if the specified user is not equal to the owner of * this book store. *

* * @param user the person trying to sell books from this book store * @param pricevalue a value in dollars * @return the smallest number of books whose total price value in dollars is * equal to the specified value in dollars from this book store @pre. the * book store contains a group of books whose total price value is * equal to specified value */ public List sellingBooks(BookStoreOwner user, int pricevalue) {

// COMPLETE THIS }