composite.java

来自「《JAVA与模式》附书中源代码」· Java 代码 · 共 37 行

package com.javapatterns.composite.exercise1;

import java.util.Vector;
import java.util.Enumeration;
public class Composite implements Component
{
    public Composite getComposite(){
            return this;
        }

    public void sampleOperation(){
        java.util.Enumeration enumeration = components();
        while (enumeration.hasMoreElements()) {
            ((Component)enumeration.nextElement()).sampleOperation();
        }
    }

    public void add(Component component){
            componentVector.addElement(component);
        }

    public void remove(Component component){
            componentVector.removeElement(component);
        }

    public Enumeration components(){
            return componentVector.elements();
        }

    /**
     * @associates <{com.javapatterns.composite.exercise1.Leaf}>
     * @link aggregation 
     * @supplierCardinality 0..*
     */
    private Vector componentVector = new java.util.Vector();
}