How to navigate to different pages on the basis of query params by jsf page initialization in the corresponding controller

@Factory("loginContext")
@Begin(join = true)
public LoginContext initLoginContext() {
    if (loginContext == null) {
      loginContext = new LoginContext();
    }
    loginContext.setLanguageCode(LocaleSelector.instance().getLanguage());
    checkEnvironment();
    Map<String,String> requestParams = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();
    String prodCode=requestParams.get("prodCode");
    String token=requestParams.get("token");
    //token validation
    if (token.equals("admin")) {
        System.out.println("admin page");
    } else if (token.equals("user")) {
        System.out.println("user page");
    } else {
        return loginContext;
    }
}

here i will be getting user credentials in token(JWE string) and then some validation of on user is done(till here code is fine and i am clear how to do this). later on on the basis of user privilege, i will navigate directly to related page for user(instead of loading the login page related to controller)

I am stuck here, Pls suggest something

Solution

in the LoginController i added following code which worked for me.:

@Factory("loginContext")
@Begin(join = true)
public LoginContext initLoginContext() {
if (loginContext == null) {
  loginContext = new LoginContext();
}
loginContext.setLanguageCode(LocaleSelector.instance().getLanguage());    
Map<String,String> requestParams = 
FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();
String prodCode=requestParams.get("prodCode");
String token=requestParams.get("token");
//token validation
loginContext.setToken(token);
loginContext.setProductCode(prodCode);
return loginContext; 
 }
@Factory(value = "redirectWelcome", autoCreate = true, scope = ScopeType.EVENT)
  public boolean isRedirectWelcome()
{
boolean welRet=false;
if(loginContext.isLoggedIn()==false)
{

String loginReturn=login();// login is customized method as per my requirement
if(loginReturn.equals("loggedIn"))
{
  FacesContext.getCurrentInstance().getApplication().getNavigationHandler().handleNavigation(FacesContext.getCurrentInstance(),
      null, "/myservice/auth/showWelcome/welcome.jspx?faces-redirect=true");

  loginContext.setLoggedIn(true);
  welRet=true;
}}
return welRet;

}

then In JSP page(login.jspx) i added following in the body.

<h:outputText value="Login  bypass..." rendered="#{loginController.redirectWelcome}" />