Software Engineering — Lab 3

Consider the below requirements for a library system. Identify the actors and construct a UML use case diagram.

• The library lends books and magazines to borrowers who registered in the system (as are the books and magazines).
• The library handles the purchase of new titles. Old books and magazines are removed when they are out of date or in poor condition.
• The librarian is an employee of the library who interacts with the customs (borrowers) and whose work is supported by the system.
• A borrower can reserve a book or magazine that is not currently available, so that when it is returned they're notified.
• The reservation is canceled when the borrower checks and the book or magazine, or through an explicit cancelling procedure.
• The librarian can create, update, and delete information about titles, borrowers, loans, and reservation in the system.

Create a UML class diagram from the below description. Begin with a noun and verb analysis.

A customer wants to make an order from a retail catalog. The customer can make the payment in one of these three kinds: cash, cheque, or credit card. The order contains order details, each with its associated item. Each order carries the date in which it has been posted and its status (pending, delivered, etc).

Implement the Observer pattern as discussed in the lectures and the course book. In the context of the Weather Station Project. You will have to change the code from Java to C#. Add the Heat Index display element as described on page 61 of the course book.

Consider the polymorphism example given in the lectures, where Employees are either Secretaries or Managers. Use the Visitor pattern to calculate the salary of employees.

Use the command pattern example from the course book as inspiration, and implement the pattern for a different, but suitable, domain.

Reverse engineer the graphical encryption/decryption system that you built in block one, using the UML class diagram notation. In other words, your task is to create a model of your implementation in UML.