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Which Factory Method pattern uses?
The factory petter uses polymorphism, dependency injection and Inversion of control. The stated purpose of the Factory Patterns is: Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.
What design issues does factory pattern address?
There might be scenarios where object creation is scattered and repetitive in various parts of the code. The Factory pattern resolves these issues by defining an interface which specifically creates the object but gives the flexibility to the implementation classes to decide on which class to instantiate.
What are the three main categories of design patterns?
As per the design pattern reference book Design Patterns – Elements of Reusable Object-Oriented Software , there are 23 design patterns which can be classified in three categories: Creational, Structural and Behavioral patterns.
How to use generic interface and factory pattern in C #?
Nevertheless, there is one way you can get something close to what you want: Use dynamic as follows (assuming that you are using the object CreateGeneric (string type) factory method from above): Be aware that dynamic uses reflection and code generation behind the scenes, which can make the initial calls relatively slow.
How to instantiate a derived class from the base class?
I am in the process of creating a factory method which uses a generic abstract type parameter to return the instance of the concrete derived type using reflection. For eg. The issue is that I cannot figure out any elegant way for the factory method to instantiate the derived type being passed the abstract base type in the method.
What does it mean to abstract factory in C #?
This means any part of your program can easily replace it. You should make it readonly, or (even better) expose it through a readonly property. If you are not abstracting the factory (i.e. exposing the Instance property as an interface), it means there is no way to use any other factory in your program.
Is there a DI container for genericint factory?
Usually for that Factory using some DI container (DI can be useful, for example, when GenericInt or GenericString has dependencies), but to demonstrate just Idea how you can resolve this: