sales.java

ssd3练习4的答案

import java.util.*;

/**
 * Maintains the information of a order. Contains a collection of {@link Orders}
 * objects.
 * 
 * @author Wang Yunsheng
 * @version 1.0.0
 * @see Orders
 */
public class Sales implements Iterable<Order> {

	/* Collection of <code>Orders</code> objects. */
	private ArrayList<Order> orders;

	/**
	 * Constructs an empty sales.
	 */
	public Sales() {

		this.orders = new ArrayList<Order>();
	}

	/**
	 * Adds a {@link Order} object to this sales.
	 * 
	 * @param Order
	 *            the {@link Orders} object.
	 */
	public void addOrder(Order order) {

		this.orders.add(order);
	}

	/**
	 * Returns an iterator over the orders in this sales.
	 * 
	 * return an {@link Iterator}
	 */
	public Iterator<Order> iterator() {

		return this.orders.iterator();
	}

	/**
	 * Returns the number of orders in the sales.
	 * 
	 * @return the number of {@link orders} objects in this sales
	 */
	public int getNumberOfOrders() {

		return this.orders.size();
	}

}