objectstructure.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 31 行

package com.javapatterns.visitor.visitor0;

import java.util.Enumeration;
import java.util.Vector;

public class ObjectStructure
{
    private Vector nodes;
    private Node node;

    public ObjectStructure()
    {
        nodes = new Vector();
    }

    public void action(Visitor visitor)
    {
        for (Enumeration e = nodes.elements();
        e.hasMoreElements(); )
        {
            node = (Node)e.nextElement();
            node.accept(visitor);
        }
    }

    public void add(Node node)
    {
        nodes.addElement(node);
    }
}