Advanced Object Oriented Programming-advanced OOP guidance and tutorials

Example

Using the Observer pattern to implement an event notification system.

Scenario

In a stock trading application, different parts of the system (e.g., user interface, data logger, analytics engine) need to be updated whenever there is a change in stock prices. By implementing the Observer pattern, you can ensure that all these components are notified and updated automatically whenever a stock price changes, without them needing to be tightly coupled.

Example

Applying the Single Responsibility Principle (SRP) to a class that handles both user authentication and data validation.

Scenario

In an e-commerce application, a single class might initially be responsible for authenticating users and validating their input data. By applying SRP, you can refactor this class into two distinct classes—one for authentication and another for data validation—making each class easier to maintain, test, and extend independently.

Example

Using reflection to dynamically create instances of classes based on configuration files.

Scenario

In a plugin-based architecture, where new modules can be added without recompiling the entire application, reflection allows you to load classes and create objects at runtime based on external configuration, thus supporting a highly flexible and extensible system.