设计模式：抽象工厂模式（4.2）C++版

抽象工厂模式：创建一族相关的产品。

C++示例代码如下：

#include "stdafx.h"/** CONTENTS: DESIGN PATTERN, ABSTRACT FACTORY PATTERN*   AUTHOR: YAO H. WANG*     TIME: 2013-11-1 17:25:29*  EDITION: 1** ALL RIGHTS RESERVED!*/#include <string>#include <list>#include <iostream>using namespace std;//调料class Dough{public:virtual void print() =0;};class ThickCrustDough: public Dough{public:void print(){cout << "ThickCrustDough" << endl;}};class ThinCrustDough: public Dough{public:void print(){cout << "ThinCrustDough" << endl;}};class Sauce{public:virtual void print() =0;};class PlumTomatoSauce: public Sauce{public:void print(){cout << "PlumTomatoSauce" << endl;}};class MarinaraSauce: public Sauce{public:void print(){cout << "MarinaraSauce" << endl;}};class Cheese{public:virtual void print() =0;};class MozzarellaCheese: public Cheese{public:void print(){cout << "MozzarellaCheese" << endl;}};class ReggianoCheese: public Cheese{public:void print(){cout << "ReggianoCheese" << endl;}};class Veggies{public:virtual void print() = 0;};class Garlic: public Veggies{public:void print(){cout << "Garlic" << endl;}};class Onion: public Veggies{public:void print(){cout << "Onion" << endl;}};class Mushroom: public Veggies{public:void print(){cout << "Mushroom" << endl;}};class RedPepper: public Veggies{public:void print(){cout << "RedPepper" << endl;}};class BlackOlives: public Veggies{public:void print(){cout << "BlackOlives" << endl;}};class Spinach: public Veggies{public:void print(){cout << "Spinach" << endl;}};class EggPlant: public Veggies{public:void print(){cout << "EggPlant" << endl;}};class Pepperoni{virtual void print() = 0;};class SlicePepperoni: public Pepperoni{void print(){cout << "SlicePepperoni" << endl;}};class Clams{public:virtual void print() = 0;};class FrozenClams: public Clams{public:void print(){cout << "FrozenClams" << endl;}};class FreshClams: public Clams{public:void print(){cout << "FreshClams" << endl;}};//调料工厂class PizzaIngredientFactory{public:virtual Dough* createDough() = 0;virtual Sauce* createSauce() = 0;virtual Cheese* createCheese() = 0;virtual list<Veggies*> createVeggies() = 0;virtual Pepperoni* createPepperoni() = 0;virtual Clams* createClams() = 0;};class NYPizzaIngredientFactory: public PizzaIngredientFactory{public:Dough* createDough(){return new ThinCrustDough();}Sauce* createSauce(){return new MarinaraSauce();}Cheese* createCheese(){return new ReggianoCheese();}list<Veggies*> createVeggies(){list<Veggies*> lv;lv.push_back(new Garlic());lv.push_back(new Onion());lv.push_back(new Mushroom());lv.push_back(new RedPepper());return lv;}Pepperoni* createPepperoni(){return new SlicePepperoni();}Clams* createClams(){return new FreshClams();}};class ChicagoPizzaIngredientFactory: public PizzaIngredientFactory{public:Dough* createDough(){return new ThickCrustDough();}Sauce* createSauce(){return new PlumTomatoSauce();}Cheese* createCheese(){return new MozzarellaCheese();}list<Veggies*> createVeggies(){list<Veggies*> lv;lv.push_back(new BlackOlives());lv.push_back(new Spinach());lv.push_back(new EggPlant());return lv;}Pepperoni* createPepperoni(){return new SlicePepperoni();}Clams* createClams(){return new FrozenClams();}};//产品class Pizza{public:string name;Dough *dough;Sauce *sauce;list<Veggies*> lv ;Cheese *cheese;Pepperoni *pepperoni;Clams *clam;virtual void prepare() = 0;virtual void bake(){cout << "Bake for 25 minutes at 350" << endl;}virtual void cut(){cout << "Cutting the pizza into diagonal slices" << endl;}virtual void box(){cout << "Place pizza in official PizzaStore box" << endl;}void setName(string name){this->name = name;}string getName(){return name;}};class CheesePizza: public Pizza{private:PizzaIngredientFactory *ingredientFactory;public:CheesePizza(PizzaIngredientFactory *ingredientFactory){this->ingredientFactory = ingredientFactory;}void prepare(){cout << "Preparing " << getName() << endl;dough = ingredientFactory->createDough();sauce = ingredientFactory->createSauce();cheese = ingredientFactory->createCheese();}};class ClamPizza: public Pizza{private:PizzaIngredientFactory *ingredientFactory;public:ClamPizza(PizzaIngredientFactory *ingredientFactory){this->ingredientFactory = ingredientFactory;}void prepare(){cout << "Preparing " << getName() << endl;dough = ingredientFactory->createDough();sauce = ingredientFactory->createSauce();cheese = ingredientFactory->createCheese();clam = ingredientFactory->createClams();}};class VeggiePizza: public Pizza{private:PizzaIngredientFactory *ingredientFactory;public:VeggiePizza(PizzaIngredientFactory *ingredientFactory){this->ingredientFactory = ingredientFactory;}void prepare(){cout << "Preparing " << getName() << endl;dough = ingredientFactory->createDough();sauce = ingredientFactory->createSauce();cheese = ingredientFactory->createCheese();lv = ingredientFactory->createVeggies();}};class PepperoniPizza: public Pizza{private:PizzaIngredientFactory *ingredientFactory;public:PepperoniPizza(PizzaIngredientFactory *ingredientFactory){this->ingredientFactory = ingredientFactory;}void prepare(){cout << "Preparing " << getName() << endl;dough = ingredientFactory->createDough();sauce = ingredientFactory->createSauce();cheese = ingredientFactory->createCheese();pepperoni = ingredientFactory->createPepperoni();}};//工厂class PizzaStore{public:Pizza* orderPizza(string type){Pizza *pizza;pizza = createPizza(type);pizza->prepare();pizza->bake();pizza->cut();pizza->box();return pizza;}private:virtual Pizza* createPizza(string type) = 0;};class NYPizzaStore: public PizzaStore{Pizza* createPizza(string type){Pizza *pizza = NULL;PizzaIngredientFactory *ingredientFactory = new NYPizzaIngredientFactory();if("cheese" == type){pizza = new CheesePizza(ingredientFactory);pizza->setName("New York Style Cheese Pizza");}else if("veggie" == type){pizza = new VeggiePizza(ingredientFactory);pizza->setName("New York Style Veggie Pizza");}else if("clam" == type){pizza = new ClamPizza(ingredientFactory);pizza->setName("New York Style Clam Pizza");}else if("pepperoni" == type){pizza = new PepperoniPizza(ingredientFactory);pizza->setName("New York Style Pepperoni Pizza");}return pizza;}};class ChicagoPizzaStore: public PizzaStore{Pizza* createPizza(string type){Pizza *pizza = NULL;PizzaIngredientFactory *ingredientFactory = new ChicagoPizzaIngredientFactory();if("cheese" == type){pizza = new CheesePizza(ingredientFactory);pizza->setName("Chicago Style Cheese Pizza");}else if("veggie" == type){pizza = new VeggiePizza(ingredientFactory);pizza->setName("Chicago Style Veggie Pizza");}else if("clam" == type){pizza = new ClamPizza(ingredientFactory);pizza->setName("Chicago Style Clam Pizza");}else if("pepperoni" == type){pizza = new PepperoniPizza(ingredientFactory);pizza->setName("Chicago Style Pepperoni Pizza");}return pizza;}};//测试void main(){PizzaStore *nyStore = new NYPizzaStore();PizzaStore *chicagoStore = new ChicagoPizzaStore();Pizza *pizza = nyStore->orderPizza("cheese");cout << "Ethan ordered a " + pizza->getName() << endl;pizza = chicagoStore->orderPizza("veggie");cout << "Joel ordered a " + pizza->getName() << endl;delete nyStore;delete chicagoStore;}