【设计模式】【门面模式，收银-厨师-服务，用户就餐】

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface Payment
{
	//模拟顾客支付费用的方法
	String pay();
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class PaymentImpl
	implements Payment
{
	//模拟顾客支付费用的方法
	public String pay()
	{
		String food = "快餐";
		System.out.println("你已经向收银员支付了费用，您购买的食物是："
			+ food);
		return food;
	}
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface Cook
{
	//模拟烹调食物的方法
	String cook(String food);
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface Cook
{
	//模拟烹调食物的方法
	String cook(String food);
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface Cook
{
	//模拟烹调食物的方法
	String cook(String food);
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public interface Cook
{
	//模拟烹调食物的方法
	String cook(String food);
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class Facade
{
	//定义被Facade封装的三个部门
	Payment pay;
	Cook cook;
	Waiter waiter;
	//构造器
	public Facade()
	{
		this.pay = new PaymentImpl();
		this.cook = new CookImpl();
		this.waiter = new WaiterImpl();
	}
	public void serveFood()
	{
		//依次调用三个部门的方法，封装成一个serveFood()方法
		String food = pay.pay();
		food = cook.cook(food);
		waiter.serve(food);
	}
}

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class Customer
{
	public void haveDinner()
	{
		//依次创建三个部门实例
/*		Payment pay = new PaymentImpl();
		Cook cook = new CookImpl();
		Waiter waiter = new WaiterImpl();
		//依次调用三个部门实例的方法来实现用餐功能
		String food = pay.pay();
		food = cook.cook(food);
		waiter.serve(food);*/
		//直接依赖于Facade类来实现用餐方法
		Facade f = new Facade();
		f.serveFood();
	}
	public static void main(String[] args)
	{
		new Customer().haveDinner();
	}
}