concretecompositeflyweight.java

《Java与模式》一书的源代码

package com.javapatterns.flyweight.composite;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class ConcreteCompositeFlyweight extends Flyweight
{
    private HashMap flies = new HashMap(10);
    private Flyweight flyweight = null;

    public ConcreteCompositeFlyweight()
    {
    }

    public void add(Character key, Flyweight fly)
    {
        flies.put(key, fly);
    }

    public void operation(String extrinsicState)
    {
        Flyweight fly = null;

        for (Iterator it = flies.entrySet().iterator(); it.hasNext(); )
        {
            Map.Entry e = (Map.Entry) it.next();
            fly = (Flyweight)e.getValue();

            fly.operation(extrinsicState);
        }
    }
}