/*
*
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/
package cart;
import java.util.*;
import database.BookDetails;
public class ShoppingCart {
HashMap items = null;
int numberOfItems = 0;
public ShoppingCart() {
items = new HashMap();
}
public void add(String bookId, BookDetails book) {
if(items.containsKey(bookId)) {
ShoppingCartItem scitem = (ShoppingCartItem) items.get(bookId);
scitem.incrementQuantity();
} else {
ShoppingCartItem newItem = new ShoppingCartItem(book);
items.put(bookId, newItem);
}
numberOfItems++;
}
public 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 Collection getItems() {
return items.values();
}
protected void finalize() throws Throwable {
items.clear();
}
public int getNumberOfItems() {
return numberOfItems;
}
public double getTotal() {
double amount = 0.0;
for(Iterator i = getItems().iterator(); i.hasNext(); ) {
ShoppingCartItem item = (ShoppingCartItem) i.next();
BookDetails bookDetails = (BookDetails) 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 void clear() {
items.clear();
numberOfItems = 0;
}
}