設計模式-AbstractFactory (抽象工廠模式)

之前介紹工廠模式對一個相同屬性的物件做處理，但是當我有很多物件需要組合?這時候可以使用抽象工廠模式

抽象工廠模式定義

為一組相互關係的物件提供一個介面，來組裝起來

抽象工廠模式用法

以 Abstract Factory 設計模式的 UML 結構圖來看，根據《物件導向設計模式》(Design Patterns) 書中所述，其中定義了參與抽象工廠模式的幾個角色：

• 抽象工廠角色(AbstractFactory) : 介面宣告出可生成各抽象成品物件的操作
• 具體工廠角色(ConcreteFactory) : 具體實作出可建構具象成品物件的操作
• 抽象產品角色(AbstractProduct) : 宣告某成品物件類型之介面
• 具體產品角色(ConcreteProduct):是 ConcreteFactory 所建構的成品物件
• 用戶端: 使會使用到AbstractFactory和AbstractProduct

抽象工廠模式實例

 
   /**
     * name: IProductFactory
     * role : AbstractFactory
     * description: 產品抽象類別
     * Created by bryant on 2017/1/11.
     */
    public abstract class IProductFactory {
        //產生播放器
        public abstract IPlayer  createPlayer();
        //產生耳機
        public  abstract IEarphone createEarphone();
    }

    /**
     * name: IPlayer
     * role : AbstractProduct
     * description: 播放器抽象類別
     * Created by bryant on 2017/1/11.
     */
    abstract class IPlayer {
        //播放抽象
        abstract  public void play() ;
    }

    /**
     * name: MP3Player
     * role : ConcreteProduct
     * description:MP3 播放器
     * Created by bryant on 2017/1/11.
     */
    public class MP3Player extends  IPlayer {
        @Override
        public void play() {
            System.out.print("MP3 Player");
        }
    }

        /**
         * name: CDPlayer
         * role : ConcreteProduct
         * description:CD 播放器
         * Created by bryant on 2017/1/11.
         */
        public class CDPlayer extends  IPlayer {
            @Override
            public void play() {
                System.out.print("CD Player");
            }
        }


    /**
     * name: IEarphone
     * role : AbstractProduct
     * description: 耳機抽象類別
     * Created by bryant on 2017/1/11.
     */
    public abstract class IEarphone {
        public abstract void capability();
    }


    /**
     * name: BeatEarphone
     * role : ConcreteProduct
     * description: BeatEarphone
     * Created by bryant on 2017/1/11.
     */
    public class BeatEarphone extends  IEarphone{
        @Override
        public void capability() {
            System.out.println("beat耳機");
        }
    }


    /**
     * name: StereoEarphone
     * role : ConcreteProduct
     * description: StereoEarphone
     * Created by bryant on 2017/1/11.
     */
    public class StereoEarphone extends  IEarphone{
        @Override
        public void capability() {
            System.out.println("立體聲耳機");
        }
    }


    /**
     * name: Walkman
     * role : ConcreteFactory
     * description: 具體工廠角色->產品功能CD、Stereo
     * Created by bryant on 2017/1/11.
     */
    public class Walkman extends IProductFactory {
        @Override
        public IPlayer createPlayer() {
            return new CDPlayer();
        }

        @Override
        public IEarphone createEarphone() {
            return new StereoEarphone();
        }
    }


        /**
     * name: Phone
     * role : ConcreteFactory
     * description: 具體工廠角色->手機功能MP3、beat耳機
     * Created by bryant on 2017/1/11.
     */
    public class Phone extends  IProductFactory {

        @Override
        public IPlayer createPlayer() {
            return new MP3Player();
        }

        @Override
        public IEarphone createEarphone() {
            return new BeatEarphone();
        }
    }