public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
AuthenticationBean authBean = (AuthenticationBean) req.getSession().getAttribute("authBean");
boolean letGo = false;
if ((authBean != null) && (authBean.getUserType().equals("student"))) {
letGo = true;
}
if (letGo) {
chain.doFilter(request, response);
} else {
resp.sendRedirect(req.getContextPath() + "/welcome.jsf");
}
}