/*
* Copyright (c) 2006 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) 2006 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 servlets;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import database.*;
import cart.*;
import util.Currency;
import exception.*;
/**
* An HTTP servlet that displays the contents of a customer's shopping
* cart at Duke's Bookstore. It responds to the GET and HEAD methods of
* the HTTP protocol. This servlet calls other servlets.
*/
public class ShowCartServlet extends HttpServlet {
private BookDBAO bookDB;
public void init() throws ServletException {
bookDB = (BookDBAO) getServletContext()
.getAttribute("bookDB");
if (bookDB == null) {
throw new UnavailableException("Couldn't get database.");
}
}
public void destroy() {
bookDB = null;
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// Get the user's session and shopping cart
HttpSession session = request.getSession(true);
ResourceBundle messages =
(ResourceBundle) session.getAttribute("messages");
ShoppingCart cart = (ShoppingCart) session.getAttribute("cart");
// If the user has no cart, create a new one
if (cart == null) {
cart = new ShoppingCart();
session.setAttribute("cart", cart);
}
// set content type header before accessing the Writer
response.setContentType("text/html");
response.setBufferSize(8192);
PrintWriter out = response.getWriter();
//Print out the response
out.println("" + "" +
messages.getString("TitleShoppingCart") + "");
// Get the dispatcher; it gets the banner to the user
RequestDispatcher dispatcher =
getServletContext()
.getRequestDispatcher("/banner");
if (dispatcher != null) {
dispatcher.include(request, response);
}
/* Handle any pending deletes from the shopping cart and
indicate the outcome as part of the response */
String bookId = request.getParameter("Remove");
BookDetails bd;
if (bookId != null) {
try {
bd = bookDB.getBookDetails(bookId);
cart.remove(bookId);
out.println("" +
messages.getString("CartRemoved") + "" +
bd.getTitle() + "
" + "");
} catch (BookNotFoundException ex) {
response.reset();
throw new ServletException(ex);
}
} else if (request.getParameter("Clear") != null) {
cart.clear();
out.println("" +
messages.getString("CartCleared") +
"
");
}
// Print a summary of the shopping cart
int num = cart.getNumberOfItems();
if (num > 0) {
out.println("" +
messages.getString("CartContents") + num +
((num == 1) ? messages.getString("CartItem")
: messages.getString("CartItems")) +
"
");
// Return the Shopping Cart
out.println("" + "" +
"| " + messages.getString("ItemQuantity") +
" | " + "" + messages.getString("ItemTitle") +
" | " + "" + messages.getString("ItemPrice") +
" | " + "
");
Iterator i = cart.getItems()
.iterator();
Currency c = (Currency) session.getAttribute("currency");
if (c == null) {
c = new Currency();
c.setLocale(request.getLocale());
session.setAttribute("currency", c);
}
while (i.hasNext()) {
ShoppingCartItem item = (ShoppingCartItem) i.next();
bd = (BookDetails) item.getItem();
c.setAmount(bd.getPrice());
out.println("" +
"| " +
item.getQuantity() + " | " + "" +
"" +
bd.getTitle() + "" + " | " +
"" + c.getFormat() +
" | " + "" + "" +
"" +
messages.getString("RemoveItem") + "" +
" |
");
}
c.setAmount(cart.getTotal());
// Print the total at the bottom of the table
out.println("" +
"
|
" + "" +
"| " +
messages.getString("Subtotal") + " | " +
"" + c.getFormat() +
" | " + "
|
");
// Where to go and what to do next
out.println("
" + messages.getString("ContinueShopping") +
" " + "" + messages.getString("Checkout") +
" " + "" +
messages.getString("ClearCart") + "");
} else {
// Shopping cart is empty!
out.println("" + messages.getString("CartEmpty") +
"" + "
" + "
" + messages.getString("Catalog") + " ");
}
out.println("