import java.util.Vector;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Shop extends HttpServlet
{
Vector inventory = new Vector();
Cart cart;
public Shop()
{
inventory.add(new Item(0, "Thinkpad", 1200.00));
inventory.add(new Item(1, "Printer", 124.99));
inventory.add(new Item(2, "D-RAM", 88.99));
}
public void checkout(PrintWriter out)
{
out.println("You have: " + cart.showCart + " things");
}
public void addItems(HttpServletRequest request, PrintWriter out)
{
String[] id = request.getParameterValues("id");
if (id == null)
out.println("received nothing");
else
{ for (int i = 0; i < id.length; i++)
cart.add(Integer.parseInt(id[i]));
}
out.println("Your cart: " + cart.showCart());
out.println("Back to list ");
out.println("Check out to checkout ");
out.println("Clear your cart");
}
public void showItems(PrintWriter out)
{
out.println("List of available items
");
out.println("
");
}
public void invalidCommand(PrintWriter out)
{
out.println("Invalid command
");
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession();
cart = (Cart)session.getAttribute("shu.cart");
if (cart == null)
{ cart = new Cart();
session.setAttribute("shu.cart", cart);
}
out.println("");
out.println("
Magical Mystery Shopping Machine
");
String cmd = request.getParameter("cmd");
if (cmd == null)
cmd = "show";
if (cmd.equals("show"))
showItems(out);
else if (cmd.equals("add"))
addItems(request, out);
else if (cmd.equals("checkout"))
checkout(out);
else
invalidCommand(out);
out.println("");
out.close();
}
}