cart.java

Java项目案例导航

package examples;

import java.util.Collection;
import java.rmi.RemoteException;
import java.util.*;
/**
 * This is the CartBean remote interface.
 *
 * This interface is what clients operate on when
 * they interact with EJB objects.  The container
 * vendor will implement this interface; the
 * implemented object is the EJB object, which
 * delegates invocations to the actual bean.
 */
public interface Cart extends javax.ejb.EJBObject {

    /**
     * Adds an item to the shopping cart
     */
    public void add(LineItem lineItem) throws RemoteException;
    
    /**
     * Changes the quantities of contents in the shopping cart
     */
    public void modify(String bookID, int quantity) throws Exception, RemoteException;

    /**
     * Returns all the shopping cart line items
     *
     * @return A collection of Cart LineItems
     */
    public Vector getAll() throws RemoteException;

    /**
     * Empties the shopping cart
     */
    public void clear() throws RemoteException;

    /**
     * Get/set methods for the shopping cart owner's name
     */
    public String getOwner() throws RemoteException;
    public void setOwner(String owner) throws RemoteException;

    /**
     * Purchases this cart.  The cart will create
     * an order in the database.
     *
     * @return The Order confirmation number
     */
    public String purchase() throws RemoteException;    
    
   /**
    * Returns the subtotal price which has been
    * previously set by setSubtotal().
    * @return the subtotal of this cart items.
    */ 
   public double getSubtotal() throws RemoteException;

   /**
    * Sets the subtotal price.
    * Our external pricer bean is responsible for
    * calculating the subtotal.  It calculates it
    * based upon customer discounts (and can be
    * extended to include other rules as well).
   */
   public void setSubtotal(double subTotal) throws RemoteException;

  /**
   * Returns the taxes for this Cart.
   */
   public double getTaxes() throws RemoteException;
	
  /**
   * Sets the taxes for this Cart.
   */
   public void setTaxes(double taxes) throws RemoteException;

  /**
   * Returns the total price.  Total Price is computed from:
   * 1) Subtotal price
   * 2) Tax
   */	
   public double getTotalPrice() throws RemoteException;
   

}