PROS:
Encapsulation: It encapsulate object creation logic, which helps reducing complex code and improves maintainability.
Decoupling: It decouples the client code from the specific classes being instantiated. Clients only need to know common interface /base classes, not the actual implementation.
Flexibility: It allows creating different types of objects without changing the client code. You can easily introduce new types of objects by adding new subclasses without modifying existing code.
Code Reusability: Promotes code reusability by centralizing object creation logic in one place, making it easier to reuse the creation logic in multiple parts of the codebase.
Testing: It facilitates easier testing, as it allows for mocking object creation in unit tests .
CONS:
Complexity: The Factory Method Design Pattern can add complexity to the code. It requires the creation of additional classes and interfaces.
Overhead: It can introduce additional classes and interfaces, which can increase the overall codebase size and complexity.
When to use the Factory Method pattern?
The Factory Method pattern is useful when:
We donāt know the exact class of object that will be created at runtime.
We want to encapsulate the object creation process.
We want to promote loose coupling between classes.
We want to promote code reuse.
Conclusion :
The Factory Method Design Pattern is a creational pattern that provides an interface for creating objects but allows subclasses to decide which class to instantiate. It is a pattern that promotes loose coupling between classes and promotes code reuse.
It is particularly useful when we donāt know the exact class of object that will be created at runtime.
Thank You!