?? cart.java
字號:
package com.tarena.shoppingcart.model;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
public class Cart implements Serializable{
private HashMap<Integer, Item> items = new HashMap<Integer, Item>();
public void addItem(Product product, int number){
if(items.containsKey(product.getId())){
Item item = (Item) items.get(product.getId());
item.setNumber(item.getNumber()+number);
item.setCost(product.getPrice()*item.getNumber());
}else{
Item item = new Item();
item.setProduct(product);
item.setNumber(number);
item.setCost(number*product.getPrice());
items.put(product.getId(), item);
}
}
public void modifyNumberByProductId(Integer productId, int number){
Item item = (Item) items.get(productId);
item.setNumber(number);
item.setCost(item.getProduct().getPrice()*number);
}
public void deleteItemByProductId(Integer productId){
items.remove(productId);
}
public void deleteItemsByProductId(Integer[] productIds){
for(Integer id:productIds){
items.remove(id);
}
}
public void clear(){
items.clear();
}
public HashMap getCartItem(){
return items;
}
public int getItemNumber(){
return items.size();
}
public boolean isEmpty(){
return items.isEmpty();
}
public double getCost(){
double cost = 0;
Collection<Item> c = items.values();
for(Item i: c){
cost += i.getCost();
}
return cost;
}
}
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