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"EJB 3.0 Preview"
Vol. 9, Issue 11, p. 22


Listing 1

public class Order implement java.io.Serializable
   private int orderId;
   private Date orderDate;
   private Collection<OrderItem> orderItems;

   @Id @Column(name="ORDER_ID")
   public int getOrderId() { return orderId; }

   public void setOrderId(int id) { orderId = id; }

   @OneToOne @JoinColumn("CUST_ID")
   public Customer getCustomer() { return customer; }

   public void setCustomer(Customer cust) { this.customer = cust; }

   @OneToMany(cascade={CascadeType.ALL}) @JoinColumn("ITEM_ORDER_ID")
   public Collection<OrderItem> getOrderItems() { return orderItems; }

   public void setOrderItems(Collection<OrderItem> items) { this.orderItems = items; }


Listing 2

public class ShoppingCartBean implements ShoppingCart
   @Inject EntityManager entityManager;


   public Order checkout()
      Order order = new Order();
      order.setOrderDate(new Date());

      return Order;

Listing 3

public class SessionBean implements Session
   @Inject EntityManager manager;

   public Customer getCustomerByName(String name)
      Query query = manager.createQuery("from Customer c where c.name = :name");
      query.setArgument("name", name);
      return query.getUniqueResult();

   public void updateCustomerInfo(Customer cust)

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