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Abstract factories are usually implemented using (a set of) factory methods. Abstract Factory pattern uses composition to delegate the responsibility of creating an object to another class while Factory Method design pattern uses inheritance and relies on a derived class or subclass to create an object.
Abstract Factory is a very central design pattern for Dependency Injection (DI). Here's a list of Stack Overflow questions where application of Abstract Factory has been accepted as the solution. To the best of my understanding, these questions represent real concerns or problems that people had, so that should get you started with some real-life examples:
Oct 23, 2012 · Is a simplified version of Factory Method. Factory Method - Defines an interface for creating objects, but let subclasses to decide which class to instantiate and Refers to the newly created object through a common interface. Abstract Factory - Offers the interface for creating a family of related objects, without explicitly specifying their ...
Jun 20, 2011 · 6. The factory pattern "Define an interface for creating an object, but let the subclasses decide which class to instantiate. The Factory method lets a class defer instantiation to subclasses". Where as abstract factory pattern "Provide an interface for creating families of related or dependent objects without specifying their concrete classes".
Nov 18, 2010 · Contains one method to produce one type of product related to its type. (It is better than a Simple Factory because the type is deferred to a sub-class.) Abstract Factory. Produces a Family of Types that are related. It is noticeably different than a Factory Method as it has more than one method of types it produces.
Feb 14, 2016 · First of all a difference between simple factory and abstract factory must be made. The first one is a simple factory where you only have one class which acts as a factory for object creation, while in the latter you connect to an factory interface (which defines the method names) and then call the different factories that implement this interface which are supposed to have different implementations of the same method based on some criteria.
Jun 8, 2011 · A factory method hides the construction of a single object; it can be used to implement virtual constructors. Another special case of a factory method is the "clone" method used in the prototype pattern. Factory methods are simply functions returning new objects. An abstract factory hides the construction of a family of related objects.
First step, create an interface and have a getType () method, in the given context it will return "one", "two" etc, otherwise it can be anything. This is the common solution most of the people suggested above. String getType(); void checkStatus(); Some implementations: @Override. public String getType() {.
Jun 3, 2016 · 2. My short explanation will be that we use the factory pattern when we don't have enough information to create a concrete object. We either don't know the dependencies or we don't know the type of the object. And almost always we don't know them because this is information that comes at runtime.
2. @Tim, I ended up using a simplified version of your approach and ChanChans, Here is the code: public class TaskFactory. {. private Dictionary<String, Type> _taskTypes = new Dictionary<String, Type>(); public TaskFactory() {. // Preload the Task Types into a dictionary so we can look them up later.
