orderimp.java

著名的uncle Bob的Agile software development的代码

import java.util.Vector;

public class OrderImp implements Order
{
  private Vector itsItems = new Vector();
  private String itsCustomerId;

  public String getCustomerId()
  {
    return itsCustomerId;
  }

  public OrderImp(String cusid)
  {
    itsCustomerId = cusid;
  }

  public void addItem(Product p, int qty)
  {
    Item item = new Item(p,qty);
    itsItems.add(item);
  }

  public int total()
  {
    try
    {
      int total = 0;
      for (int i = 0; i < itsItems.size(); i++)
      {
        Item item = (Item) itsItems.elementAt(i);
        Product p = item.getProduct();
        int qty = item.getQuantity();
        total += p.getPrice() * qty;
      }
      return total;
    }
    catch (Exception e)
    {
      throw new Error(e.toString());
    }
  }
}