Core design patterns (9) Factory method factory method mode

Vs 2008

The factory method mode allows you to create a series of classes that belong to the same product system. In addition, unlike the general simple factory, the factory method mode creates products by sub-classes. To add new products, you do not need to modify the originalCodeTo add a new factory subclass.

1. Mode UML diagram

2. Application

ProgramDifferent transportation tools need to be used to abstract the behavior of transportation tools into an interface, so these transportation tools form a product system with common behavior. Create a factory system for the product based on the concept of the factory method model.

Itransportation. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {

Public InterfaceItransportation{

VoidRun ();
}
}

Car. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {

Public   Class Car: itransportation {
Itransportation members # Region Itransportation members

Public   Void Run () {
Console. writeline ("I am a car, I am running");
}

# Endregion
}
}

Plane. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {

Public   Class Plane: itransportation {
Itransportation members # Region Itransportation members

Public   Void Run () {
Console. writeline ("I am a plane, I am running");
}

# Endregion
}
}

Itransportationfactory. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {
Public InterfaceItransportationfactory{

Itransportation create ();
}
}

Carfactory. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {

Public   Class Carfactory: itransportationfactory {
Itransportationfactory members # Region Itransportationfactory members

Public Itransportation create () {
Return NewCar ();
}

# Endregion
}
}

Planefactory. CS
Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;

Namespace Designpattern. factorymethod. BLL {

Public   Class Planefactory: itransportationfactory {
Itransportationfactory members # Region Itransportationfactory members

Public Itransportation create () {
Return NewPlane ();
}

# Endregion
}
}

Client

Using System;
Using System. Collections. Generic;
Using System. LINQ;
Using System. text;
Using Designpattern. factorymethod. BLL;

Namespace Designpattern. factorymethod {
Class Program {
Static   Void Main ( String [] ARGs) {

Itransportationfactory carfactory =   New Carfactory ();
Itransportation car = Carfactory. Create ();
Car. Run ();

Itransportationfactory planefactory =   New Planefactory ();
Itransportation plane = Planefactory. Create ();
Plane. Run ();
}
}
}

Output