composite.java

Java与模式 源代码

package com.javapatterns.visitor.inventory;

import java.util.Vector;

abstract class Composite extends Equipment
{
    /**
     * @directed
     * @link aggregation
     * @clientCardinality 1
     */
    private Vector parts = new Vector(10);

    public Composite()
    {
    }

    public void add(Equipment equip)
    {
        parts.add(equip);
    }

    public double price()
    {
        double total = 0;

        for (int i = 0; i < parts.size(); i++)
        {
            total += ((Equipment)parts.get(i)).price();
        }

        return total;
    }

    public void accept(Visitor v)
    {
        for (int i = 0; i < parts.size(); i++)
        {
            ((Equipment)parts.get(i)).accept(v);
        }
    }
}