In this assignment, you will be designing a simple online shop. You can choose the type of product for this shop (clothes, sport equipment, etc.). The goal of this assignment is to gain experience in designing  classes for  a  specific  problem,  choosing  the  right  attributes  and  methods for the classes, and practicing UML diagrams. Please note that you do not need to implement a working sample of the shop and the goal of this assignment is just the design part.

The weight for this assignment is 10% of the course total. The assignment will be graded out of 100.

Shop Requirements

The  online  shop  has  an  inventory  consisting  of  different  products with their  correspondent quantities. The users can navigate to the shop, add products to their carts, and pay with their credit cards. Each user must be registered and have valid information stored in the system (name, email, etc.). The users should have at least one credit card on the system.

Also, based on the products that a user buys, its quantity in the inventory decreases. The online shop also has one admin who can add new items, change the quantity of items, and add/remove users.

In this assignment your goal is to answer these questions:

•   What are the entities (classes) in this problem?

•   What are the required attributes and methods for each of the classes?

•   What are the access modifiers for these attributes and methods?

•   What are the types of the attributes and the return types of the methods?

Notes

UML

After designing your classes on paper and choosing the attributes and methods for them, you will have to design your UML based on the information we have learned in class. The UML consists of the class names, their attributes, methods, and the relationship between the classes. The UML will be submitted as a single PDF file. You can use online tools to draw the UML or simply use tables (for example in Microsoft Words).

Please very briefly explain your challenges, i.e., did you have any doubts if a specific item counts as a class or not, how did you overcome this doubt, did you have doubts about the return types of some methods, and so on.

.java Files

As you know, each of the classes will be mapped to a .java file. Do not forget to add the getters and setters when necessary. You should also add the attributes and methods you have chosen for each class. Do not forget to add proper constructor(s) for each of the classes.