🏭 Factory Method Design Pattern
The Factory Method pattern defines an interface for creating objects,
but lets subclasses decide which class to instantiate.
This pattern lets a class defer instantiation to its subclasses, promoting loose coupling and flexibility. 🎛️
Key Concepts 🧩
- Creator: Declares the factory method, which returns an object of a product type.
- ConcreteCreator: Implements the factory method to return an instance of a specific product.
- Product: Defines the interface of objects the factory method creates.
- ConcreteProduct: Implements the Product interface.
When to Use? 🤔
- When a class can’t anticipate the class of objects it must create.
- To delegate the responsibility of instantiation to subclasses.
- To localize knowledge of which helper subclass is the delegate.
Benefits 🌟
- Single Responsibility: Creation logic is separated from usage.
- Open/Closed Principle: Add new products without changing existing code.
- Flexibility: Choose which product to create at runtime.
Drawbacks ⚠️
- More Classes: Can lead to a proliferation of subclasses.
- Complexity: Adds indirection to object creation.
Conclusion 🎬
The Factory Method pattern is ideal when you need to delegate object creation to subclasses,
enabling more flexible and maintainable code!