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GoF - Coggle Diagram

- - - - How can an object be created so that subclasses can redefine which class to instantiate?
        
        Define a separate operation (factory method) for creating an object.
      - How can a class defer instantiation to subclasses?
        
        Create an object by calling a factory method.
    - - "Define an interface for creating an object, but let subclasses decide which class to instantiate. The Factory method lets a class defer instantiation it uses to subclasses." (Gang Of Four)
  - - - separate the construction of a complex object from its representation.
    - - problems
        
        simplify object creation
        
        Encapsulate creating and assembling the parts of a complex object in a separate Builder object.
        
        A class delegates object creation to a Builder object instead of creating the objects directly.
        
        create different representation of a complex object
      - A class (the same construction process) can delegate to different Builder objects to create different representations of a complex object.
    - - A class (the same construction process) can delegate to different Builder objects to create different representations of a complex object.
    - - Allows you to vary a product's internal representation.
      - Builder classes must be mutable.
      - Provides control over steps of construction process.
    - - A distinct ConcreteBuilder must be created for each type of product.
      - Builder classes must be mutable.
      - May hamper/complicate dependency injection.