/*
* 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 dispatcher;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import cart.ShoppingCart;
import database.*;
import exception.*;
public class Dispatcher extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) {
String bookId = null;
String clear = null;
BookDetails book = null;
BookDBAO bookDBAO = (BookDBAO)getServletContext().getAttribute("bookDBAO");
HttpSession session = request.getSession();
String selectedScreen = request.getServletPath();
ShoppingCart cart = (ShoppingCart)session.getAttribute("cart");
if (cart == null) {
cart = new ShoppingCart();
session.setAttribute("cart", cart);
}
if (selectedScreen.equals("/bookcatalog")) {
bookId = request.getParameter("Add");
if (!bookId.equals("")) {
try {
book = bookDBAO.getBookDetails(bookId);
cart.add(bookId, book);
} catch (BookNotFoundException ex) {
// not possible
}
}
} else if (selectedScreen.equals("/bookshowcart")) {
bookId =request.getParameter("Remove");
if (bookId != null) {
cart.remove(bookId);
}
clear = request.getParameter("Clear");
if (clear != null && clear.equals("clear")) {
cart.clear();
}
} else if (selectedScreen.equals("/bookreceipt")) {
// Update the inventory
try {
bookDBAO.buyBooks(cart);
} catch (OrderException ex) {
selectedScreen ="/bookordererror";
}
}
String screen = selectedScreen + ".jsp";
try {
request.getRequestDispatcher(screen).forward(request, response);
} catch(Exception ex) {
ex.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) {
String screen = request.getServletPath() + ".jsp";
try {
request.getRequestDispatcher(screen).forward(request, response);
} catch(Exception ex) {
ex.printStackTrace();
}
}
}