Lab1 - The SOLID principles

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Introduction¶

The SOLID principles are design principles that are used in Object-Oriented software development in order to encourage us to create more maintainable, understandable, and flexible applications. In this workshop, we will iterate through each principle where a given problem has already been addressed. We will analyze the existing solution, identify its shortcomings and then suggest a more SOLID design for it.

Questions¶

Clone this repository https://github.com/INSATunisia/SOLID locally and go through the examples in the following order:

• SRP (Single Responsibility Principle)
• OCP (Open-Closed Principle)
• LSP (Liskov Substituion Principle)
• ISP (Interface Segregation Principle)
• DIP (Dependency Inversion Principle)

In each directory, you will find an example with its refactored solution (called example_refactored) and an exercice. You need to apply the given principle to the exercice, model it with UML and explain the reasons of your choice.

I invite you to discover PlantUML for designing UML diagrams.

Deliverables¶

You will need to submit the following deliverables in the Classroom space (the work is done by pairs) :

• A report depicting the design of each exercise before and after the applied modification, with an explanation of the principle and how/why did you perform the changes.
• A link of the github repository showing your code.