Redirect on load page if user not logged - help needed !!!

[Mat Sergino]

Hello,

I have a problem with writing a code in JSF ... I would like to redirect users on one of my pages when the are not logged in.
To achieve it I made a page with:

<h:inputHidden value="#{loginBean.ifLogged}" />

loginBean - it's a session bean in my application

I've also written a getIfLogged method:

     
public String getIfLogged(FacesContext context, UIComponent component, Object value) {
   if(!login.equals("unknown")){
       System.out.println("true"+login);
       return "true: ";
   }else{
       try{  FacesContext.getCurrentInstance().getExternalContext().dispatch("not_logged.jsf");
       System.out.println("false"+login);
    }catch(Exception ex){
        ex.printStackTrace();
    }
        return "false"; 
   }
}  

I receive the following exception when I try to execute the page:

javax.servlet.ServletException: Could not retrieve value of component with path : {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /strona1.jsp][Class: javax.faces.component.html.HtmlForm,Id: _idJsp0][Class: javax.faces.component.html.HtmlInputHidden,Id: _idJsp1]}
javax.faces.webapp.FacesServlet.service(FacesServlet.java:154)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
    

Any suggestion?

[ December 04, 2008: Message edited by: Mat Sergino ]
[ December 04, 2008: Message edited by: Mat Sergino ]