BookDetailsServlet.java

 

 /*
  *
  * 
  */
 
 import java.io.*;
 import java.util.*;
 import javax.servlet.*;
 import javax.servlet.http.*;
 import database.*;
 import cart.*;
 import util.Currency;
 import exception.*;
 
 /**
  * Respond to the GET method of the HTTP protocol. 
  */
 public class BookDetailsServlet 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 = null;
    }
 
       
    public void doGet (HttpServletRequest request,
                        HttpServletResponse response)
         throws ServletException, IOException {
 
         HttpSession session = request.getSession(true);
     		ResourceBundle messages = (ResourceBundle)session.getAttribute("messages");
 
    // set headers and buffer size before accessing the Writer
         response.setContentType("text/html");
             response.setBufferSize(8192);
             PrintWriter out = response.getWriter();
 
    // then write the response
         out.println("<html>" +
                     "<head><title>" + messages.getString("TitleBookDescription") + "</title></head>");
 
         // Get the dispatcher; it gets the banner to the user
         RequestDispatcher dispatcher =
                getServletContext().getRequestDispatcher("/banner");
                                        
             if (dispatcher != null)
                dispatcher.include(request, response);
                
         //Get the identifier of the book to display
         String bookId = request.getParameter("bookId");
         if (bookId != null) {
 
             // and the information about the book
             try {
                BookDetails bd = bookDB.getBookDetails(bookId);
                Currency c = (Currency)session.getAttribute("currency");
                if (c == null) {
                   c = new Currency();
                   c.setLocale(request.getLocale());
                   session.setAttribute("currency", c);
                }
                c.setAmount(bd.getPrice());
       
 
                //Print out the information obtained
                out.println("<h2>" + bd.getTitle() + "</h2>" +
                            "&nbsp;" + messages.getString("By") + " <em>" + bd.getFirstName() + " " +
                            bd.getSurname() + "</em> &nbsp; &nbsp; " +
                            "(" + bd.getYear() + ")<br> &nbsp; <br>" +
                            "<h4>" + messages.getString("Critics")+ "</h4>" +
                            "<blockquote>" + bd.getDescription() +
                            "</blockquote>" +
                            "<h4>" + messages.getString("Price") + c.getFormat() + "</h4>" +
                            "<p><strong><a href=\"" +
                            response.encodeURL(request.getContextPath() + "/catalog?bookId=" + bookId) +
                            "\">" + messages.getString("CartAdd") + "</a>&nbsp;&nbsp;&nbsp;" +
                            "<a href=\"" + 
                            response.encodeURL(request.getContextPath() + "/catalog") + "\">" + messages.getString("ContinueShopping") + "</a></p></strong>");
             } catch (BookNotFoundException ex) {
                      response.resetBuffer();
                      throw new ServletException(ex);
             }
                                     
 
         }
         out.println("</body></html>");
         out.close();
     }
 
     public String getServletInfo() {
         return "The BookDetail servlet returns information about" +
                "any book that is available from the bookstore.";
     }
 
 }