flavorfactorysingleton.java

《Java与模式》一书的源代码

package com.javapatterns.flyweight.coffeeshop;

public class FlavorFactorySingleton
{

    private Order[] flavors = new Flavor[10];
    private int ordersMade = 0;
    private int totalFlavors = 0;
    private static FlavorFactorySingleton myself = new FlavorFactorySingleton();

    private FlavorFactorySingleton() { }

    public static FlavorFactorySingleton getInstance()
    {
        return myself;
    }

    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;
    }
}