反射工厂模式

[注：摘自http://www.cnblogs.com/hg98/archive/2007/06/06/774338.html]

反射工厂模式： 其实就是通过反射的方式来获得具体实例化是那个类。

namespace ReflactionFactoryPartern
{
    public interface IFactoryVehicle
    {
        IVehicle CreateVehicle();
    }
}

namespace ReflactionFactoryPartern
{
    public class FactoryCar : IFactoryVehicle
    {
        public IVehicle CreateVehicle()
        {
            return new Car();
        }
    }
}

namespace ReflactionFactoryPartern
{
    public class FactoryBoat : IFactoryVehicle
    {
        public IVehicle CreateVehicle()
        {
            return new Boat();
        }
    }
}

namespace ReflactionFactoryPartern
{
    public interface IVehicle
    {
        void go();
    }
}

namespace ReflactionFactoryPartern
{
    public class Car : IVehicle
    {
        public void go()
        {
            Console.WriteLine("This is a Car");
        }
    }
}

namespace ReflactionFactoryPartern
{
    public class Boat : IVehicle
    {
        public void go()
        {
            Console.WriteLine("This is a boat.");
        }
    }
}　

using System.Reflection;

 namespace ReflactionFactoryPartern
{
    class ReflectFactory
    {
        public static IVehicle CreateVehicleByReflect(string typeName)
        {
            string namespaceStr = "ReflactionFactoryPartern";
            string tempChar = ".";
            //注意使用Type.GetType(String classname)时，必须指定其命名空间，否则返回为null
             Type type = Type.GetType(namespaceStr + tempChar + typeName,true);
            
            ConstructorInfo ci = type.GetConstructor(System.Type.EmptyTypes); 
            return (IVehicle)ci.Invoke(null);
        }
    }
}

 

namespace ReflactionFactoryPartern
{
    class Program
    {
        static void Main(string[] args)
        {
            IVehicle vechicle = ReflectFactory.CreateVehicleByReflect("Car");
            vechicle.go();
            Console.ReadLine();    
        }
    }
}