[Id], [ISBN/ISSN], [Category], [Genre/Subject], [Title], [Author], [Publisher], [Publication Year], [Volume (for Journal only)], [Available count], [Total count]

[Id], [Username], [Password], [Name], [Date of Birth], [Gender], [User Type], [University], [SID], [Renewal Date], [Membership]

[Id], [Start Date], [Expired Date], [Content Id], [Borrower Id], [Is returned]

• DBAccess() constructor in DBAccess.cpp
• signIn() method in LibMS.cpp
• signUp() method in LibMS.cpp
• Copy/Paste Database.h, Database.cpp
• Fix addStudent() method in UserData.cpp. Add setId().
• Fix readAllReservation(), readUserReservation() method in ReservationData.cpp
• Fix createReservation() method in ReservationData.cpp, should update database.
• Fix updateContent(), addContent() methods in ContentData.cpp
• Fix deleteContent() method in ContentData.cpp, just need to compare ID only!
• Copy/Paste addStudent() method in UserData.cpp
• Copy/Paste updateStudent() method in UserData.cpp
• Copy/Paste deleteStudent() method in UserData.cpp
• Copy/Paste searchReadingByTitle(), searchReadingByAuthors() in ContentData.cpp

1. Content, Reading are abstract classes. If a method returns a Content/Reading pointer, that pointer should point to an instance of Book or Academic Journal.
2. Use filter to refine the results!

In general, we would like to design our system as real life activity. Followings are important classes/abstract classes and their role.

Description: This class contains all needed information for the entire program to work, including current user, viewing reading, database. Thus, it is designed with Singleton pattern. There is only one instance of this class and it is constructed when the main program starts launching.

Description: This is an abstract class which contains information of a real life user. Each user would have an account which is store in a different class, Account. Student and Staff are two derived classes of this class.

Description: This is an abstract class which contains information of a real life content which can be a book, a record, a media player. In this project, we just work with reading items which are books and academic journals.

Description: This is an abstract class which contains information of a reservation, including content that is borrowed, borrower, start date and expired date.

Description: This is a regular class that defines all CRUD operation on back-end database. This class's methods often require queries (String) which will be passed from derived classes (UserData, ContentData, ReservationData). Its child classes will do their particular tasks:

• UserData: Add, modify, delete users' account. This class will associate with derived UserParser classes to complete the task.
• ReservationData: Add, modify, delete reservations. It also uses ReservationFilter instance to refine the results of searching.
• ContentData: Add, modify, delete content. This class will associate with derived ContentParser classes to complete the task. It also uses SearchingFilter instance to refine the results of searching.

Description: These two class are abstract class. Its derived classes should implement to return specific queries to operate with database. For example, there are two derived classes (Book and Academic Journal) and their attribute are different from each other, so we need to add them into database with distinguished queries. When we call a method of ContentData class to add a book to the database, we should pass a BookParser instance to it. Then, BookParser should return a specific query.