Design Patterns - Composite - CompositeComponent

CompositeComponent.java

package com.algorithmhelper.softwareengineering.designpatterns.composite;

import com.algorithmhelper.datastructures.interfaces.List;
import com.algorithmhelper.datastructures.lists.DynamicArray;

public class CompositeComponent implements AbstractComponent {

    private static int globalID = 0;
    private int id = globalID++;
    private List<AbstractComponent> components;

    /**
     * Initializes a CompositeComponent.
     */
    public CompositeComponent() {
        components = new DynamicArray<>();
    }

    /**
     * Inserts an AbstractComponent to the list of components.
     *
     * @param component, the AbstractComponent
     */
    public void addComponent(AbstractComponent component) {
        components.insertBack(component);
    }

    /**
     * Performs some operation on the CompositeComponent.
     */
    public void operation() {
        System.out.println("from CompositeComponent with id " + id);

        for (AbstractComponent component : components)
            component.operation();
    }
}