享元模式（咖啡屋）【java与模式】

package com.javapatterns.flyweight.coffeeshop;

public class Flavor extends Order
{
private String flavor;

public Flavor(String flavor)
{
this.flavor = flavor;
}

public String getFlavor()
{
return this.flavor;
}

public void serve(Table table)
{
System.out.println("Serving table " + table.getNumber() + " with flavor " + flavor );
}
}

package com.javapatterns.flyweight.coffeeshop;

public class Table
{
private int number;

public Table(int number)
{
this.number = number;
}

public void setNumber(int number)
{
this.number = number;
}

public int getNumber()
{
return number;
}

}

package com.javapatterns.flyweight.coffeeshop;

public class FlavorFactory
{
/**
* @label Flyweight
* @link aggregation
*/
private Order[] flavors = new Flavor[10];
private int ordersMade = 0;
private int totalFlavors = 0 ;

public Order getOrder(String flavorToGet)
{
if (ordersMade > 0)
{
for (int i = 0; i < ordersMade; i++)
{
if (flavorToGet.equals((flavors[i]).getFlavor()))
{
return flavors[i];
}
}
}
flavors[ordersMade] = new Flavor(flavorToGet);
totalFlavors++;
return flavors[ordersMade++];
}

public int getTotalFlavorsMade()
{
return totalFlavors;
}
}

package com.javapatterns.flyweight.coffeeshop;

public class Client
{
//the flavors ordered

/**
* @label Creates
*/
private static Order[] flavors = new Flavor[100];

private static int ordersMade = 0;
private static FlavorFactory flavorFactory;

/** @link dependency */
/*#Table lnkTable;*/

private static void takeOrders(String aFlavor)
{
flavors[ordersMade++] = flavorFactory.getOrder(aFlavor);
}

public static void main(String[] args)
{
flavorFactory = new FlavorFactory();

takeOrders("Black Coffee");
takeOrders("Capucino");
takeOrders("Espresso");
takeOrders("Espresso");
takeOrders("Capucino");
takeOrders("Capucino");
takeOrders("Black Coffee");
takeOrders("Espresso");
takeOrders("Capucino");
takeOrders("Black Coffee");
takeOrders("Espresso");

for (int i = 0; i < ordersMade; i++)
{
flavors[i].serve(new Table(i));
}

System.out.println("\nTotal teaFlavor objects made: " +
flavorFactory.getTotalFlavorsMade());
}
}