cart.java

shoppingCar 购物车

package com.tarena.shoppingcar.entity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

public class Cart {
	private HashMap<Integer, Item> items = new HashMap<Integer,Item>();
	@SuppressWarnings("unused")
	private Set<Item> itemSet;
	private double cost;

	public Set<Item> getItemSet(){
		Set<Item> sitems = new HashSet<Item>();
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			sitems.add(items.get(i));
		}
		return sitems;
	}
	
	public void addItem(Item item) {
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			if(i.equals(item.getProduct().getId())){
				Item myItem = items.get(i);
				myItem.setAmount(myItem.getAmount()+item.getAmount());
				setCost();
				return;
			}
		}	
		items.put(item.getProduct().getId(), item);	
		setCost();
	}

	public void modifyItemNumber(Item item) {
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			Item initem = items.get(i);
			if (initem.equals(item)) {
				initem.setAmount(item.getAmount());
				setCost();
			}
		}
	}

	public void removeItemByProductId(Integer productId) {
		Set<Integer> key = items.keySet();
		Iterator<Integer> it=key.iterator();
		while(it.hasNext()){
			Integer i=it.next();
			Item item=items.get(i);
			if(item.getProduct().getId()==productId){
				it.remove();
				setCost();
			}
		}
//		for (Integer i : key) {
//			Item item = items.get(i);
//			if (item.getProduct().getId() == productId) {
//				items.remove(i);
//				setCost();
////				break;
//			}
//		}
	}

	public void clear() {
		items.clear();
		this.cost = 0.00;
	}

	public boolean isEmpty() {
		if (items.size() == 0) {
			return true;
		}
		return false;
	}

	public void setItems(HashMap<Integer, Item> items) {
		this.items = items;
	}

	public void setCost() {
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			Item item = items.get(i);
			this.cost = this.cost + item.getProduct().getPrice() * item.getAmount();
		}
	}

	public HashMap<Integer, Item> getItems() {
		return items;
	}
	public List<Product> getProductsFromItems(HashMap<Integer, Item> items) {
		List<Product> products = new ArrayList<Product>();
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			Item item = items.get(i);
			products.add(item.getProduct());
		}
		return products;
	}
	public Set<Item> transMapToSet(HashMap<Integer, Item> items){
		Set<Item> itemsAsSet = new HashSet<Item>();
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			Item item = items.get(i);
			itemsAsSet.add(item);
		}
		return itemsAsSet;
	}

	public double getCost() {
		double cost = 0.00;
		Set<Integer> key = items.keySet();
		for (Integer i : key) {
			cost = cost + items.get(i).getProduct().getPrice()*items.get(i).getAmount();
		}
		return cost;
	}
	
}