package horstmann.ch05_invoice;
import java.util.ArrayList;

/**
   A bundle of line items that is again a line item.
 */
public class Bundle implements LineItem
{
	/**
      Constructs a bundle with no items.
	 */
	public Bundle() { items = new ArrayList<LineItem>(); }

	/**
      Adds an item to the bundle.
      @param item the item to add
	 */
	public void add(LineItem item) { items.add(item); }

	public double getPrice()
	{
		double price = 0;

		for (LineItem item : items)
			price += item.getPrice();
		return price;
	}

	public String toString()
	{
		String description = "Bundle: ";
		for (int i = 0; i < items.size(); i++)
		{
			if (i > 0) description += ", ";
			description += items.get(i).toString();
		}
		return description;
	}

	private ArrayList<LineItem> items;
}