cartejb.java

一个优秀的供应商管理系统

package apusic.myshop.cart.ejb;



import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.Set;
import java.util.Collection;
import java.util.HashMap;
import java.rmi.RemoteException;
import javax.ejb.FinderException;

import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.ejb.EJBException;
import javax.ejb.CreateException;

import apusic.myshop.util.EJBUtil;
import apusic.myshop.control.GeneralFailureException;
import apusic.myshop.util.Debug;

import apusic.myshop.product.ejb.ProductHome;
import apusic.myshop.product.ejb.Product;
import apusic.myshop.cart.model.CartModel;
import apusic.myshop.cart.model.CartItem;

public class CartEJB implements SessionBean  {

  private HashMap cart;

  public CartEJB() {
    cart = new HashMap();
  }

  public CartModel getDetails() {
    ArrayList items = new ArrayList();
    try {
      ProductHome productHome = EJBUtil.getProductHome();

      Set keys = null;
      if (cart != null) keys = cart.keySet();
      Iterator it = null;
      if (keys != null) it = keys.iterator();

      while ((it != null) &&  it.hasNext()) {
        String itemId = (String) it.next();
        int qtyNeeded = ((Integer) cart.get(itemId)).intValue();
        try {
          Product product = productHome.findByProductId(itemId);
          String cataId = product.getCatalog();
          String productName = product.getName();
          String style = product.getStyle();
          double listPrice = product.getListPrice();

          CartItem cartItem = new CartItem(
            itemId, cataId, productName,
            style, qtyNeeded, listPrice);
          items.add(cartItem);
        } catch (FinderException fe) {
          throw new GeneralFailureException(fe);
        }
      }
    } catch (RemoteException re) {
      throw new GeneralFailureException(re);
    }
    CartModel model = new CartModel(items);
    return model;
  }

  public void addItem (String itemNo) {
    cart.put(itemNo, new Integer(1));
  }

  public void addItem (String itemNo,int qty) {
    cart.put(itemNo, new Integer(qty));
  }

  public void deleteItem (String itemNo) {
    cart.remove(itemNo);
  }

  public void updateItemQty (String itemNo, int newQty) {
    cart.remove(itemNo);
    cart.put(itemNo, new Integer(newQty));
  }

  public void empty () {
    cart.clear();
  }

  public void ejbCreate() {
    cart = new HashMap();
  }

  public void ejbCreate(HashMap starting) {
    cart = (HashMap) starting.clone();
  }

  public void setSessionContext(SessionContext sc) {}

  public void ejbRemove() {}

  public void ejbActivate() {}

  public void ejbPassivate() {}

}