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/*
* 工厂方法模式
* 定义了一个创建对象的接口,
* 但由子类决定要实例化的类是哪一个.
* 工厂方法让类把实例话推迟到子类.
*/

import java.util.ArrayList;

public class Factory {

public static void main(String[] args) {
PizzaStore nyStore = new NYPizzaStore();
PizzaStore chicagoStore = new ChicagoPizzaStore();

Pizza pizza = nyStore.orderPizza("cheese");
System.out.println("Ethan ordered a " + pizza.getName() + "\n");

pizza = chicagoStore.orderPizza("cheese");
System.out.println("Joel ordered a " + pizza.getName() + "\n");
}

}

// 这就是传说中的工厂
abstract class PizzaStore {
// 定义pizza的整个制作流程
public Pizza orderPizza(String type) {
Pizza pizza;

pizza = createPizza(type);

pizza.prepare();
pizza.bake();
pizza.cut();
pizza.box();

return pizza;
}

// 正真的工厂方法,推迟到子类去实现
protected abstract Pizza createPizza(String type);
}

// 具体的工厂
class NYPizzaStore extends PizzaStore {
//具体的方法不一定就是参数实现,也可以没有参数
protected Pizza createPizza(String item) {
if (item.equals("cheese")) {
return new NYStyleCheesePizza();
} else if (item.equals("veggie")) {
return new NYStyleVeggiePizza();
} else
return null;
}
}

class ChicagoPizzaStore extends PizzaStore {
protected Pizza createPizza(String item) {
if (item.equals("cheese")) {
return new ChicagoStyleCheesePizza();
} else if (item.equals("veggie")) {
return new ChicagoStyleVeggiePizza();
} else
return null;
}
}

//产品的抽象类
abstract class Pizza {
protected String name;
protected String dough;
protected String sauce;
ArrayList<String> toppings = new ArrayList<String>();

void prepare() {
System.out.println("Preparing" + name);
System.out.println("Tossing dough");
System.out.println("Adding sauce...");
System.out.println("Adding toppings: ");
for (int i = 0; i < toppings.size(); i++) {
System.out.println(" " + toppings.get(i));
}
}

void bake() {
System.out.println("Bake for 25 minutes at 350");
}

void cut() {
System.out.println("Cutting the pizza into diagonal slices");
}

void box() {
System.out.println("Place pizza in official Pizzastore box");
}

public String getName() {
return name;
}
}

//具体的产品类
class NYStyleCheesePizza extends Pizza {
public NYStyleCheesePizza() {
name = "NY Style Sauce and Cheese Pizza";
dough = "Thin Crust Dough";
sauce = "Marinara Sauce";

toppings.add("Grated Reggiano Cheese");
}
}

class ChicagoStyleCheesePizza extends Pizza {
public ChicagoStyleCheesePizza() {
name = "Chicago Style Sauce and Cheese Pizza";
dough = "Extra Thick Crust Dough";
sauce = "Plum Tomato Sauce";

toppings.add("Shredded Mozzarella Cheese");
}

void cut() {
System.out.println("Cutting the pizza into square slices");
}
}

class NYStyleVeggiePizza extends Pizza {
public NYStyleVeggiePizza() {
name = "NY Style Sauce and Veggie Pizza";
dough = "Thin Crust Dough";
sauce = "Marinara Sauce";

toppings.add("Grated Reggiano Veggie");
}
}

class ChicagoStyleVeggiePizza extends Pizza {
public ChicagoStyleVeggiePizza() {
name = "Chicago Style Sauce and Veggie Pizza";
dough = "Extra Thick Crust Dough";
sauce = "Plum Tomato Sauce";

toppings.add("Shredded Mozzarella Veggie");
}

void cut() {
System.out.println("Cutting the pizza into square slices");
}
}
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