/*
* Copyright 2007 Sun Microsystems, Inc.
* All rights reserved. You may not modify, use,
* reproduce, or distribute this software except in
* compliance with the terms of the License at:
* http://developer.sun.com/berkeley_license.html
*/
package com.sun.bookstore.cart;
import java.util.*;
import com.sun.bookstore.database.Book;
public class ShoppingCart {
HashMap<String, ShoppingCartItem> items = null;
int numberOfItems = 0;
public ShoppingCart() {
items = new HashMap<String, ShoppingCartItem>();
}
public synchronized void add(
String bookId,
Book book) {
if (items.containsKey(bookId)) {
ShoppingCartItem scitem = (ShoppingCartItem) items.get(bookId);
scitem.incrementQuantity();
} else {
ShoppingCartItem newItem = new ShoppingCartItem(book);
items.put(bookId, newItem);
}
}
public synchronized void remove(String bookId) {
if (items.containsKey(bookId)) {
ShoppingCartItem scitem = (ShoppingCartItem) items.get(bookId);
scitem.decrementQuantity();
if (scitem.getQuantity() <= 0) {
items.remove(bookId);
}
numberOfItems--;
}
}
public synchronized List<ShoppingCartItem> getItems() {
List<ShoppingCartItem> results = new ArrayList<ShoppingCartItem>();
results.addAll(this.items.values());
return results;
}
protected void finalize() throws Throwable {
items.clear();
}
public synchronized int getNumberOfItems() {
numberOfItems = 0;
for (Iterator i = getItems()
.iterator(); i.hasNext();) {
ShoppingCartItem item = (ShoppingCartItem) i.next();
numberOfItems += item.getQuantity();
}
return numberOfItems;
}
public synchronized double getTotal() {
double amount = 0.0;
for (Iterator i = getItems()
.iterator(); i.hasNext();) {
ShoppingCartItem item = (ShoppingCartItem) i.next();
Book bookDetails = (Book) item.getItem();
amount += (item.getQuantity() * bookDetails.getPrice());
}
return roundOff(amount);
}
private double roundOff(double x) {
long val = Math.round(x * 100); // cents
return val / 100.0;
}
public synchronized void clear() {
System.err.println("Clearing cart.");
items.clear();
numberOfItems = 0;
}
}