itembiz.java

shoppingCar 购物车

package com.tarena.shoppingcar.biz;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import com.tarena.shoppingcar.dao.ItemDao;
import com.tarena.shoppingcar.entity.Item;
import com.tarena.shoppingcar.entity.Product;
import com.tarena.shoppingcar.factory.ItemFactory;

public class ItemBiz {
	private ItemDao dao = ItemFactory.getDao();
	public Set<Item> getItems(List<Product> products) {
		Set<Item> items = new HashSet<Item>();
		a: for (Product product : products) {
			for (Item item : items) {
				if (product.getId() == item.getProduct().getId()) {
					item.setAmount(item.getAmount() + 1);
					item.setCost(item.getCost() + product.getPrice());
					continue a;
				}
			}
			Item it = new Item();
			it.setProduct(product);
			it.setAmount(1);
			it.setCost(product.getPrice());
			items.add(it);
		}
		return items;
	}
	public void save(Set<Item> items,int id) {
		dao.save(items,id);
	}
}