order.java

ssd3部分quiz、exercise、exam的参考答案

import java.util.*;

public class Order {
	
	private ArrayList<OrderItem> items;
	
	public Order() {
		items = new ArrayList<OrderItem>();
	}
	
	public void addItem(OrderItem orderItem) {
		items.add(orderItem);
	}
	
	public void removeItem(OrderItem orderItem) {
		for (Iterator<OrderItem>  itemIterator = this.iterator(); 
		itemIterator.hasNext();) {
			if(itemIterator.next().equals(orderItem))
				itemIterator.remove();
		}
	}
	
	public Iterator<OrderItem> iterator() {
		return items.iterator();
	}
	
	public ArrayList<OrderItem> getOrderItem() {
		return this.items;
	}
	
	public OrderItem getItem(Product product) {
		OrderItem temp = null;
		for(OrderItem record: items) {
			if(record.getProduct().equals(product)) {
				temp = record;
				break;
			}
		}
		return temp;
	}
	
	public int getNumberOfItems() {
		return items.size();
	}
	
	public double getTotalCost() {
		double temp = 0.0;
		for(OrderItem record: items) {
			temp += record.getValue();
		}
		return temp;
	}

}