设计模式-抽象工厂模式(Abstract Factory Pattern)

抽象工厂模式

抽象工厂模式为创建一系列相关或依赖对象提供了接口，而无需指定它们的具体类。

AbstractFactory

为创建抽象产品的操作声明一个接口

ConcreteFactory

实现创建具体产品对象的操作

AbstractProduct

声明产品对象类型的接口

Product

AbstractProduct接口的实现，由相应的工厂创建的产品对象

Client

使用AbstractFactory和AbstractProduct类声明的接口

示例代码

/// <summary>
/// AbstractFactory
/// </summary>
public abstract class MobilePhoneFactory
{
    public abstract SmartPhone CreateSmartPhone();
    public abstract NormalPhone CreateNormalPhone();
}

/// <summary>
/// AbstractProduct 1
/// </summary>
public class SmartPhone
{
    public virtual void ShowDetails() { }
}

/// <summary>
/// AbstractProduct 2
/// </summary>
public class NormalPhone
{
    public virtual void ShowDetails() { }
}

/// <summary>
/// ConcreteFactory 1
/// </summary>
public class HuaweiFactory : MobilePhoneFactory
{
    public override NormalPhone CreateNormalPhone()
    {
        return new HuaweiA616();
    }

    public override SmartPhone CreateSmartPhone()
    {
        return new HuaweiP50();
    }
}

/// <summary>
/// ConcreteFactory 2
/// </summary>
public class NokiaFactory : MobilePhoneFactory
{
    public override NormalPhone CreateNormalPhone()
    {
        return new Nokia1280();
    }

    public override SmartPhone CreateSmartPhone()
    {
        return new Nokia1020();
    }
}

/// <summary>
/// Product 1
/// </summary>
internal class HuaweiA616 : NormalPhone
{
    public override void ShowDetails()
    {
        System.Console.WriteLine("Huawei A616,体积为72.5×37.5×20.6mm，重56g，支持小灵通...");
    }
}

/// <summary>
/// Product 2
/// </summary>
internal class HuaweiP50 : SmartPhone
{
    public override void ShowDetails()
    {
        System.Console.WriteLine("Huawei P50,长度 156.5mm 宽度 73.8mm 厚度 7.92mm,5000 万像素原色摄像头（彩色，f/1.8 光圈）,八核，1 x Cortex-X1@2.84 GHz + 3 x Cortex-A78@2.42 GHz + 4 x Cortex-A55@1.8 GHz...");
    }
}

/// <summary>
/// Product 3
/// </summary>
internal class Nokia1020 : SmartPhone
{
    public override void ShowDetails()
    {
        System.Console.WriteLine("Nokia 1020,130.4mm×71.4mm×10.4mm，158g,操作系统采用 Windows Phone 8.1,4,100 万像素 PureView 摄像头...");
    }
}

/// <summary>
/// Product 4
/// </summary>
internal class Nokia1280 : NormalPhone
{
    public override void ShowDetails()
    {
        System.Console.WriteLine("Nokia 1280,主屏分辨率 96x68像素,尺寸 107.2x45.1x15.3mm...");
    }
}

/// <summary>
/// Client
/// </summary>
public class MobileDealer
{
    private NormalPhone normalPhone;
    private SmartPhone smartPhone;

    public MobileDealer(MobilePhoneFactory factory)
    {
        normalPhone = factory.CreateNormalPhone();
        smartPhone = factory.CreateSmartPhone();
    }

    public void Reserve()
    {
        normalPhone.ShowDetails();
        smartPhone.ShowDetails();
    }
}

//---------------------------------------
 static void Main(string[] args)
 {
     MobilePhoneFactory factory = new HuaweiFactory();
     MobileDealer dealer = new MobileDealer(factory);
     dealer.Reserve();

     factory = new NokiaFactory();
     dealer = new MobileDealer(factory);
     dealer.Reserve();
 }