cart.java

Java EE 5 许多新功能都包含经过修补的 EJB 架构

/*
 * Copyright 2006 Borys Burnayev
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.rdacorp.petstore.domain;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * @author Borys Burnayev
 */
public class Cart {

   private List<OrderItem> items;

   public Cart() {
      items = new ArrayList<OrderItem>(10);
   }

   public List getItems() {
      return items;
   }

   public void addItem(OrderItem item) {
      if (items.contains(item))
         return;
      items.add(item);
   }

   public void removeItem(OrderItem item) {
      items.remove(item);
   }

   public void updateQuantity(OrderItem item, long quantity) {
      item.setQuantity(quantity);
   }

   public BigDecimal getTotal() {
      BigDecimal total = new BigDecimal(0);
      for (int i = 0; i < items.size(); i++) {
         OrderItem orderItem = (OrderItem) items.get(i);
         total = total.add(orderItem.getExtendedPrice());
      }
      return total;
   }

   public String toString() {
      String cart = "Cart:\n";
      for (int i = 0; i < items.size(); i++) {
         cart.concat(items.get(i).toString());
      }
      return cart;
   }

   public OrderItem findOrderItemByItemCode(String code) {
      for (Iterator ii = items.iterator(); ii.hasNext();) {
         OrderItem orderItem = (OrderItem) ii.next();
         if (orderItem.getItem().getCode().equals(code))
            return orderItem;
      }
      return null;
   }
}