shoppingcart.java

工厂版本管理系统,STRUTS2框架,用于管理商品的版本,便于有效的控制版本

package com.bluesky.elecall.domain.cart;

import java.math.BigDecimal;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

import com.bluesky.elecall.domain.Product;

public class ShoppingCart {
	private Map items;
	//capacity - items.size = empty line count
	private int capacity;	
	

	public int getCapacity() {
		return capacity;
	}

	public void setCapacity(int capacity) {
		this.capacity = capacity;
	}

	public ShoppingCart(){
		items = new TreeMap<String,CartItem>();
		capacity=5;
	}
	
	public Map getItems() {
		return items;
	}

	public void setItems(Map items) {
		this.items = items;
	}
	
	public void addItem(String productId,long quantity, Product product){		
		CartItem ci = (CartItem)items.get(productId);
		if(ci==null)
		{
			CartItem newItem = new CartItem(productId,quantity);
			newItem.setProduct(product);
						
			items.put(productId, newItem);
		}
		else
			ci.increaseQuantity(quantity);
		
	}
	
	public long getTotalQuantity(){
		long sum=0;
		
		Iterator it = items.values().iterator();
		while(it.hasNext()){
			CartItem ci = (CartItem)it.next();
			if(ci.isValid())
				sum += ci.getQuantity();
		}
		
		return sum;
	}
	
	public BigDecimal getTotalAmount(){
		BigDecimal sum= BigDecimal.ZERO;
		
		Iterator it = items.values().iterator();
		while(it.hasNext()){
			CartItem ci = (CartItem)it.next();
			if(ci.isValid())
				sum = sum.add( ci.getAmount());
		}
		
		return sum;
	}
	
	public void removeItem(String productId){
		
		if(items.containsKey(productId))
			items.remove(productId);		
	}
	
	public void increaseCapacity(int count){
		capacity += count;
	}
	
	public void removeBlankRows(){
		capacity = items.size();
	}
	
	public void clear(){
		items.clear();
	}
	
	public void removeInvalidItems(){
		Iterator<CartItem> it = items.values().iterator();
		while(it.hasNext())
		{
			CartItem ci = it.next();
			if(!ci.isValid())
				it.remove();				
		}
	}
	
	public boolean getIsValid(){
		return isValid();
	}
	
	public boolean isValid(){
		Iterator<CartItem> it = items.values().iterator();
		while(it.hasNext()){
			CartItem ci = it.next();
			if(!ci.isValid())
				return false;			
		}
		
		return true;
	}
	
}