设计模式学习04—建造者模式

//食物的抽象创建者
public abstract class FoodBuilder {
    // 套餐
    protected SetMealProduct sm = new SetMealProduct();

    // 创建汉堡
    public abstract void buildHamburg();

    // 创建薯条
    public abstract void buildChips();

    // 创建可乐
    public abstract void buildCola();

    // 创建鸡肉卷
    public abstract void buildChickenRolls();

    public SetMealProduct getResult() {
        return sm ;
    }
}

//具体食品创建者：KFC
//这样未来还可以支持麦当劳
public class KFCFoodBuilder extends FoodBuilder {

    @Override
    public void buildHamburg() {
        sm.getFoodList().add( "汉堡");
    }

    @Override
    public void buildChips() {
        sm.getFoodList().add( "薯条");
    }

    @Override
    public void buildCola() {
        sm.getFoodList().add( "可乐");
    }

    @Override
    public void buildChickenRolls() {
        sm.getFoodList().add( "鸡肉卷" );
    }

}

//套餐
public class SetMealProduct {
    // 套餐名称
    private String name;
    // 套餐中的食品集合
    private List<String> foodList = new ArrayList<String>();

    public List<String> getFoodList() {
        return foodList ;
    }

    public void setFoodList(List<String> foodList) {
        this.foodList = foodList;
    }

    public String getName() {
        return name ;
    }

    public void setName(String name) {
        this.name = name;
    }

}

//套餐一（薯条+可乐+汉堡）
class FirstDirector {

    private FoodBuilder fb;

    public FirstDirector(FoodBuilder fb) {
        this.fb = fb;
    }

    public SetMealProduct construct() {
        fb.buildChips(); // 薯条
        fb.buildHamburg(); // 汉堡
        fb.buildCola(); // 可乐
        return fb .getResult();
    }
}

// 套餐二（鸡肉卷+薯条+可乐）
class SecondDirector {

    private FoodBuilder fb;

    public SecondDirector(FoodBuilder fb) {
        this.fb = fb;
    }

    public SetMealProduct construct() {
        fb.buildChickenRolls(); // 鸡肉卷
        fb.buildChips(); // 薯条
        fb.buildCola(); // 可乐
        return fb .getResult();
    }
}

        FirstDirector fDirector = new FirstDirector( new KFCFoodBuilder());
        SecondDirector sDirector = new SecondDirector( new KFCFoodBuilder());
        fDirector.construct();
        sDirector.construct();