shoppingcart.java

网上商城

package com.witbridge.netstore.framework;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

import com.witbridge.netstore.model.Items;

public class ShoppingCart {
	int size=0;
	double total;
	public  List<ShoppingCartItem> items=new ArrayList<ShoppingCartItem>();
	
	public void addItem(ShoppingCartItem newItem){
		ShoppingCartItem cartItem=findItem(newItem.getId());
		
		if(cartItem!=null){
			cartItem.setQuantity(cartItem.getQuantity()+newItem.getQuantity());
		}else{
			items.add(newItem);
		}
	}
	
	
	public int getSize() {
		return items.size();
	}


	public void setSize(int size) {
		this.size = size;
	}


	public void updateQuantity(Long itemId, 
            int newQty) {
ShoppingCartItem item = findItem(itemId);
if(item != null) {
item.setQuantity(newQty);
}
}
	
	public void removeItem(Long itemId){
		ShoppingCartItem item=findItem(itemId);
		if(item!=null){
			items.remove(item);
		}
	}
	
	public void removeItems(List<String> itemIds){
		if(itemIds!=null){
			for(String itemId:itemIds){
				removeItem(new Long(itemId));
			}
		}
	}
	private ShoppingCartItem findItem(Long itemId){
		ShoppingCartItem item=null;
		for(ShoppingCartItem cartItem:items){
			if(cartItem.getId().equals(itemId)){
				item=cartItem;	
			}
		}
		return item;
	}


	public double getTotal() {
		total=0.0;
		for(ShoppingCartItem item:items){
			total+=item.getUnitPrice();
		}
		return total;
	}


	public void setTotal(double total) {
		this.total = total;
	}
}