Factory Design Pattern C Code

In essence in c what we strive to do when we create an object factory class is to be able to pass some piece of dynamic information a type identifier and create a class of appropriate static type from this. Factory method is a creational design pattern that provides an interface for creating objects in a superclass but allows subclasses to alter the type of objects that will be created.

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There are two factory patterns im aware of.

Factory design pattern c code.

If we need to create the family of related or dependent objects then we can use abstract factory pattern.
In factory pattern we create object without exposing the creation logic to client and the client use the same common interface to create new type of object.
The idea is to use a static member function static factory method which creates returns instances hiding the details of class modules from user.

But there remains coupling where instances are actually created.
Before and after back to factory method description before.
The architect has done an admirable job of decoupling the client from stooge concrete derived classes and exercising polymorphism.

Yes this is a good example of a concrete factory design pattern.
One of them is the factory method and the other is the abstract factroy pattern.
The factory method design pattern is used by first defining a separate operation a factory method for creating an object and then using this factory method by calling it to create the object.

Your code is a specific implementation of the factory method one which has a create parameter that is the type name of the creatable object.
Trying to maintain portability across multiple platforms routinely requires lots of preprocessor case statements.
This is referred to as code coupling and the factory method pattern assists in decoupling the code.

To name the method more descriptively it can be named as factory and product method.
Factory method factory method define an interface for creating an object but let subclasses decide which class to instantiate.
Factory method design pattern in c.

Abstract factory pattern in useful when the client needs to create objects which are somehow related.
So in general in your factory.
This enables writing of subclasses that decide how a parent object is created and what type of objects the parent contains.

Before and after back to abstract factory description.
There are times when the client code does not know the exact type of object.
Abstract factory design pattern in c.

Factory method lets a class defer instantiation to subclasses.