Factory Method Patterns
Definition: In
Factory pattern, we create object without exposing the creation logic. In this
pattern, an interface is used for creating an object, but let subclass decide
which class to instantiate. The creation of object is done when it is required.
The Factory method allows a class later instantiation to subclasses.
Uses of Factory Method
Patterns
1.
creation of object is done when it is required.
2.
The process of objects creation is required to
centralize within the application.
3.
A class (creator) will not know what classes it will be
required to create.
interface Product
{
}
class ConcreteProductA : Product
{
}
class ConcreteProductB : Product
{
}
abstract class Creator
{
public abstract Product
FactoryMethod(string type);
}
class ConcreteCreator : Creator
{
public override Product
FactoryMethod(string type)
{
switch (type)
{
case "A":
return new ConcreteProductA();
case "B":
return new ConcreteProductB();
default: throw new
ArgumentException("Invalid type", "type");
}
}
}
No comments:
Post a Comment
Comments Welcome