libsys

Class Handler

java.lang.Object

libsys.Handler

class Handler
extends java.lang.Object

Handles all the background operations of MainGUI, also contains both UserFactory and BookFactory

Field Summary

Fields

Modifier and Type	Field and Description
(package private) BookFactory	books
private java.util.Calendar	cal
(package private) UserFactory	users

Constructor Summary

Constructors

Constructor and Description
Handler() Creates new empty Handler

Method Summary

Modifier and Type	Method and Description
(package private) java.lang.String	bookIdsToTitlesString(int[] bookIDs) Create a String of all book titles with the given Book ids
(package private) boolean	borrowBook(User user, Book book) Given User borrows the given Book
private int[]	calDueDate(int days) Calculating the due date
(package private) int[]	calDueDate(int days, int[] date)
private int[]	currentDay() Returns the current date in an int array
(package private) boolean	returnBook(User user, Book book) Given User returns the given Book

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

books

BookFactory books

cal

private java.util.Calendar cal

users

UserFactory users

Constructor Detail

Handler

public Handler()

Creates new empty Handler

Method Detail

bookIdsToTitlesString

java.lang.String bookIdsToTitlesString(int[] bookIDs)

Create a String of all book titles with the given Book ids

Parameters:

bookIDs - Array of Book ids

Returns:

String of book titles separated with "; "

borrowBook

boolean borrowBook(User user,
                   Book book)

Given User borrows the given Book

Parameters:

user - User borrowing the Book

book - Book to be borrowed

Returns:

If the borrow operation is successful

calDueDate

private int[] calDueDate(int days)

Calculating the due date

Parameters:

days - Amount of days to be borrowed

Returns:

Amount of days added to the current day

calDueDate

int[] calDueDate(int days,
                 int[] date)

currentDay

private int[] currentDay()

Returns the current date in an int array

Returns:

date in ([YYYY][MM][DD]) format

returnBook

boolean returnBook(User user,
                   Book book)

Given User returns the given Book

Parameters:

user - User returning the Book

book - Book to be returned

Returns:

If the return operation is successful