The abstract factory pattern is often used together with either the factory method or prototype pattern. Provide an interface for creating families of related or dependent objects without specifying their concrete classes. May be beneficial in prototyping phase of a new project due to simplicity and quickness to implement.With that in mind the abstract factory pattern implemented in its minimal form is of similar complexity as the simple factory pattern. It is recommended to create interfaces and abstract base classes only after it is clear that they are necessary, instead of starting out with the maximum possible complexity a pattern has to offer. When patterns are read as a set of rules and restrictions, as opposed to guidelines, the resulting code will gain all the complexity from the unused layers of abstraction, while gaining none of the benefits.
Simple factory pattern accesses all the classes it can construct through a switch statement - every time a class is added to the factory, the switch statement has to be updated. In other words it should be possible to add new behavior to a class through inheritance or composition, without having to modify the class itself.
Learning factory switch software#
This principle states, that software entities should be open for extension, but closed for modification. The method generally takes either a string or enum parameter that is then used in a switch statement to choose which object to create.Ī frequent criticism on simple factory pattern is, that it does not adhere to the open/closed principle. To implement it all that is required is a single class with a method that returns a new created object. The simple factory pattern is a simplified merger of the abstract factory pattern and the factory method pattern. Allows interfaces for creating objects without exposing the object creation logic to the client.
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