The Factory Pattern is a versatile design pattern that simplifies object creation, by providing a method that acts as a “factory” for creating objects. It abstracts the instantiation process, allowing the type of object designed to be determined at runtime.
Image creating a user authentication system where users have different roles like Admin, Members or Guest. Each role might have a distinct authentication mechanism and permissions.
Before using the Factory Pattern:
After using the Factory Pattern:
Key points
- Decoupling: Client code is decoupled from the object creation code, promoting modularity.
- Flexibility: New types/functions can be added seamlessly without altering existing code.
- Abstraction: The client code does not need to know about the concrete types or creation logic.
We can see that the Factory Pattern abstracts away the complexity and provides a cleaner, more maintainable and scalable solution. However, as with everything, it is crucial to apply it only where the benefits outweigh the introduced abstraction layer.
#programmingNotes
ALT Creating a user by role before using factory pattern
ALT Creating a user implementing the Factory pattern using typescript