Factory Method
The Factory Method design pattern is utilized to create objects without specifying the exact class, leading to reduced code repetition and enhanced abstraction. This pattern allows classes to defer instantiation to subclasses, promoting flexibility and reducing verbosity in code. However, it can also introduce confusion due to its abstract nature. Learn about the purpose, terminology, advantages, disadvantages, and references related to the Factory Method pattern.
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Presentation Transcript
Intent/Purpose Factory Method is used to deal with a problem of creating objects without specifying the EXACT class of object that we will be creating or explicitly calling the object s constructor. As a result, we get less code repetition and a higher degree of abstraction This can be useful when a class cant anticipate the type of object it must create.
Definition/Description A factory method is a creational pattern Its purpose is to define an interface for creating objects which allows a class to defer instantiation to a subclass Factory method is another, more abstract and elegant way of creating object with the same base class without using their constructor Multi-SubClass Constructor
Terminology Product Product - usually an abstract type of object that a factory method will create Concrete Product Concrete Product a concrete instance of Product Creator Creator - abstract type/interface which returns an object of type Product. Concrete Creator Concrete Creator overrides the factory method in Creator
Advantages Reduce code verbosity Have clear distinguishable name for the Factory Method unlike constructors Not required to create a new object when called, this adds to flexibility
Disadvantages Code can become more confusing
REFERENCES Design Patterns by Gang of Four Wikipedia Stack Overflow
