/*
*
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/
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 BookDB bookDB;
public void init() throws ServletException {
bookDB =
(BookDB)getServletContext().getAttribute("bookDB");
if (bookDB == null)
throw new UnavailableException("Couldn't get database.");
}
public void destroy() {
bookDB.remove();
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("