private List<Book> getBooksFromRequest(HttpServletRequest request) {
List<Book> list = null;
String categoryString;
String searchString;
Category category;
categoryString = request.getParameter(CATEGORY_CMD);
searchString = request.getParameter(SEARCH_CMD);
if (categoryString != null && !categoryString.isEmpty()) {
if (categoryString.equalsIgnoreCase(ON_SPECIAL_CMD)) {
list = bookDatabaseAccessor.getSpecialBooks();
} else {
category = Category.valueOf(categoryString);
list = bookDatabaseAccessor.getBooks(category);
}
} else if (searchString != null && !searchString.isEmpty()) {
list = bookDatabaseAccessor.getBookByKeyword(searchString);
}
return list;
}
/** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String command;
User user;
String url = MAIN_JSP;
command = request.getParameter(COMMAND);
System.out.println("Command: " + command);
if (command != null) {
if (command.equalsIgnoreCase(CREATE_USER_CMD)) {
user = createUserFromRequest(request);
user.validateUser();
if (user.isUserValid()) {
userDatabaseAccessor.insertUser(user);
url = MAIN_JSP;
} else {
url = USER_PROFILE_JSP;
}
request.getSession().setAttribute(SESSION_USER, user);
} else if (command.equalsIgnoreCase(UPDATE_USER_CMD)) {
user = createUserFromRequest(request);
user.validateUser();
if (user.isUserValid()) {
userDatabaseAccessor.updateUser(user);
@SuppressWarnings("unchecked")
List<Book> list = (List<Book>) request.getSession().getAttribute(SESSION_LIST);
if (list == null) {
list = bookDatabaseAccessor.getSpecialBooks();
request.getSession().setAttribute(SESSION_LIST, list);
}
url = MAIN_JSP;
} else {
url = USER_PROFILE_JSP;
}
request.getSession().setAttribute(SESSION_USER, user);
} else if (command.equalsIgnoreCase(DISPLAY_MAIN_PAGE_CMD)) {
List<Book> list = getBooksFromRequest(request);
url = MAIN_JSP;
request.getSession().setAttribute(SESSION_LIST, list);
}
}
System.out.println("url: " + url);
System.out.println(getServletContext().toString());
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url);
dispatcher.forward(request, response);
}