Library.java

The Library constructor will initialize an array of Book and Patron objects using the book and patron array parameters.

The checkin method will check in a book upon return. If the returned book belongs in the Library, and it is currently checked out, this method should update the status of the book, reset its patron and due date, determine the fine for this book (if any), and update the patron's balance. The return value indicates success or failure. For example, if the book is not in the library, checkin should return false.

The checkout method will let a patron checkout a book that is available in the Library. If the book belongs to the library and is available, this method will update it's status and patron, and set the due date to ten days from today's date. The return value indicates success or failure. For example, if the book is not in the library, checkout should return false.

The determineFine method will compute the fine currently due for a book that is checked out. For this method, the fine rate is $0.50 per day for each day after the due date.

The searchBooks method searches for books, depending on the key and type, and returns an array of the books found. If no books are found, the resulting array will have a length of zero.

When type is TITLE_SEARCH, key will be a string containing the title to search. The method should return all books with that title.

When type is AUTHOR_SEARCH, key will be a String containing the author's name. The method should return all books for that author.

When type is PATRON_SEARCH, key will either be a Patron object or an Integer with the Patron's id. The method should return all books checked out to that patron.

When type is OVERDUE_SEARCH, key will be a Date object. The method should return all books that will be overdue on that date (if not checked in before then).

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Test Code for Library.java

import junit.framework.TestCase; import java.util.Date;

/** * Tests Library: currently one test method. * * @author * @version * */ public class LibraryTest extends TestCase {

/** A single test for Library. **/ public void testLibrary() {

String title = "Starting Out With Java"; String author = "Tony Gaddis"; String isbn = "978-0-13-395705-1"; int year = 2016; int pages = 1188; String title2 = "Starting Out With Java Edition 4"; String author2 = "T. Gaddis"; String isbn2 = "978-0-13-608020-6"; int year2 = 2008; int pages2 = 977; Book b0 = new Book(title2, author2, isbn2, year2, pages2); Book b1 = new Book(title, author, isbn, year, pages); Book b2 = new Book(title, author, isbn, year, pages); Book[] deesBooks = {b0, b1, b2}; Patron p0 = new Patron("Dee A. B. Weikle", "weikleda@jmu.edu", 2, 1.50); Patron p1 = new Patron("Chris Mayfield", "mayfiecs@jmu.edu", 1, 1.00); Patron p2 = new Patron("Alvin Chao", "chaoaj@jmu.edu", 0, 0); Patron[] deesPatrons = {p0, p1, p2}; Library deesLibrary = new Library(deesBooks, deesPatrons); if (deesLibrary.checkout(deesBooks[1], deesPatrons[2])) { assertEquals("Library checkout1:", Book.UNAVAILABLE, deesBooks[1].getStatus()); assertTrue("Library checkout3:", deesPatrons[2].equals(deesBooks[1].getPatron())); assertEquals("Library checkout 4:", 10, DateUtils.interval(new Date(), deesBooks[1].getDue())); if (deesLibrary.checkin(deesBooks[1])) { assertEquals("Library checkout5", Book.AVAILABLE, deesBooks[1].getStatus()); assertEquals("Library checkout6", null, deesBooks[1].getPatron()); assertEquals("Library checkout7", null, deesBooks[1].getDue()); } } else { assertTrue("Library checkout failed", false); } // Test with book not in the library Book b3 = new Book("Title", "Author", "isbn", 2010, 220); assertFalse("Library no book checkout", deesLibrary.checkout(b3, p0)); // Test determine fine, checkout book with overdue date Date today = new Date(); Date tenDaysAgo = DateUtils.addDays(today, -10); b0.checkout(p0, tenDaysAgo); assertEquals("5.00 fine", 5.00, deesLibrary.determineFine(b0)); // Test search books - something there Book[] actual = deesLibrary.searchBooks("Tony Gaddis", Library.AUTHOR_SEARCH); assertEquals("Library author search 2 books:", 2, actual.length); assertTrue("Library author search 2 books, b1", actual[0] == b1 || actual[1] == b1); assertTrue("Library author search 2 books, b2", actual[0] == b2 || actual[1] == b2); Book[] actual2 = deesLibrary.searchBooks(title, Library.TITLE_SEARCH); assertEquals("Library title search 2 books:", 2, actual2.length); assertTrue("Library title search 2 books, b1", actual2[0] == b1 || actual2[1] == b1); assertTrue("Library title search 2 books, b2", actual2[0] == b2 || actual2[1] == b2); Book[] actual3 = deesLibrary.searchBooks(p0, Library.PATRON_SEARCH); assertEquals("Library patron search 2 books:", 1, actual3.length); assertTrue("Library patron search 2 books, b1", actual3[0] == b0); Book[] actual4 = deesLibrary.searchBooks(new Date(), Library.OVERDUE_SEARCH); assertEquals("Library overdue search 2 books:", 1, actual4.length); assertTrue("Library overdue search 2 books, b1", actual4[0] == b0); // Test search books nothing there Book[] actual5 = deesLibrary.searchBooks("Author", Library.AUTHOR_SEARCH); assertEquals("Library author search not there:", 0, actual5.length); Book[] actual6 = deesLibrary.searchBooks("Title", Library.TITLE_SEARCH); assertEquals("Library title search not there:", 0, actual6.length); Book[] actual7 = deesLibrary.searchBooks(p2, Library.PATRON_SEARCH); assertEquals("Library patron search not there:", 0, actual7.length); Date d = new Date(); Book[] actual8 = deesLibrary.searchBooks(DateUtils.addDays(d, -20), Library.OVERDUE_SEARCH); assertEquals("Library overdue search not there:", 0, actual8.length); // Test patron search with int idnumber instead Book[] actual9 = deesLibrary.searchBooks(0, Library.PATRON_SEARCH); assertEquals("Library patron search idnum not there:", 0, actual9.length); Book[] actual10 = deesLibrary.searchBooks(2, Library.PATRON_SEARCH); assertEquals("Library patron search idnum b0", 1, actual10.length); assertTrue("Library patron search idnum b0", actual10[0] == b0); } }

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Patron.java

public class Patron {

private String name;

private String email;

private int idNumber;

private double balance;

public Patron(String name, String email,

int idNumber, double balance) {

this.name = name;

this.email = email;

this.idNumber = idNumber;

this.balance = balance;

}

public double adjustBalance(double amount) {

this.balance = balance;

this.balance = this.balance + amount;

return this.balance;

}

public boolean equals(Object other) {

boolean result = false;

if (other instanceof Patron)

{ Patron patron = (Patron) other;

result = this.idNumber == patron.idNumber;

}

else if (other instanceof Integer)

{ Integer id = (Integer) other;

result = this.idNumber == id;

}

return result;

}

public String toString() {

return String.format("Name: %s, Email: %s, ID: %d, Balance: $%.2f.",

name, email, idNumber, balance);

}

}

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Book.java

import java.util.Date;

public class Book {

public static final int AVAILABLE = 1;

public static final int UNAVAILABLE = 2;

private String title;

private String author;

private String isbn;

private int year;

private int pages;

private int status;

private Date due;

private Patron patron;

public Book (String title, String author, String isbn,

int year, int pages) {

this.title = title;

this.author = author;

this.isbn = isbn;

this.year = year;

this.pages = pages;

this.status = AVAILABLE;

Date due = null;

Patron patron = null;

}

public void checkin () {

this.status = AVAILABLE;

this.due = null;

this.patron = null;

}

public void checkout (Patron patron, Date due) {

this.status = UNAVAILABLE;

this.patron = patron;

this.due = due;

}

public boolean equals(Object other) {

boolean result = false;

if (other instanceof Book)

{

Book book = (Book) other;

result = this.isbn.equals(book.isbn);

}

else if (other instanceof String)

{

String str = (String) other;

result = this.isbn.equals(str);

}

return result;

}

public String getTitle() {

return title;

}

public String getAuthor() {

return author;

}

public String getIsbn() {

return isbn;

}

public int getPages() {

return pages;

}

public int getYear() {

return year;

}

public int getStatus() {

return status;

}

public Date getDue() {

return due;

}

public Patron getPatron () {

return patron;

}

public String toString() {

return String.format("Title: %s, Author: %s, ISBN: %s, Year: %d, Pages: %d.",

title, author, isbn, year, pages);

}

}