/*
* Copyright (c) 2002 Sun Microsystems, Inc. All rights reserved. U.S.
* Government Rights - Commercial software. Government users are subject
* to the Sun Microsystems, Inc. standard license agreement and
* applicable provisions of the FAR and its supplements. Use is subject
* to license terms.
*
* This distribution may include materials developed by third parties.
* Sun, Sun Microsystems, the Sun logo, Java and J2EE are trademarks
* or registered trademarks of Sun Microsystems, Inc. in the U.S. and
* other countries.
*
* Copyright (c) 2002 Sun Microsystems, Inc. Tous droits reserves.
*
* Droits du gouvernement americain, utilisateurs gouvernementaux - logiciel
* commercial. Les utilisateurs gouvernementaux sont soumis au contrat de
* licence standard de Sun Microsystems, Inc., ainsi qu'aux dispositions
* en vigueur de la FAR (Federal Acquisition Regulations) et des
* supplements a celles-ci. Distribue par des licences qui en
* restreignent l'utilisation.
*
* Cette distribution peut comprendre des composants developpes par des
* tierces parties. Sun, Sun Microsystems, le logo Sun, Java et J2EE
* sont des marques de fabrique ou des marques deposees de Sun
* Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
*/
package cart;
import java.util.*;
import database.BookDetails;
public class ShoppingCart {
HashMap items = null;
int numberOfItems = 0;
public ShoppingCart() {
items = new HashMap();
}
public synchronized 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 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 Collection getItems() {
return items.values();
}
protected void finalize() throws Throwable {
items.clear();
}
public synchronized int getNumberOfItems() {
return numberOfItems;
}
public synchronized 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 synchronized void clear() {
System.err.println("Clearing cart.");
items.clear();
numberOfItems = 0;
}
}