Navigation bar image should change when the user logs in(JSF 2.0 + primefaces)

I use a primefaces dock as a nav bar. I want it to change one of its images depending on if the user is logged in or not. I did something but it doesn't work, because i see the two icons at the same time and also i cant click the logout button. 开发者_运维百科Can you give me some advice?

This is the nav bar(It is created in a template all pages use):

<h:body>
        <h:form>
        <p:dock position="top">
            <p:menuitem value="Naslovna" icon="unsecuredimages/naslovna.png"
                url="main.xhtml" alt="The image could not be found." />
            <p:menuitem value="Register" icon="unsecuredimages/register.png"
                url="registration.xhtml" alt="The image could not be found." />
            <p:menuitem value="Cesta pitanja" icon="unsecuredimages/faq.png"
                url="faq.xhtml" alt="The image could not be found." />

            <p:menuitem value="Login" icon="unsecuredimages/login.png" url="login.xhtml" rendered ="securityController.checkLogged() == false"/>
        <p:menuitem value="Logout" icon="unsecuredimages/logout.png" action="securityController.logOut()" rendered ="securityController.checkLogged() == true"/>

        </p:dock>   
        </h:form>

This is how the securityController Backing bean looks like:

@ManagedBean
@RequestScoped
public class SecurityController {

    @EJB
    private IAuthentificationEJB authentificationEJB;

    ...

    public boolean checkLogged() {
        return authentificationEJB.checkAuthentificationStatus();
    }

    ...
}

In the process there is also an EJB involved:

@Stateful(name = "ejbs/AuthentificationEJB")
public class AuthentificationEJB implements IAuthentificationEJB {

    @PersistenceContext
    private EntityManager em;

        ....

        // Check if user is logged in
    public boolean checkAuthentificationStatus() {
        // 1-Check if there is something saved in the session(This means the
        // user is logged in)
        if ((FacesContext.getCurrentInstance().getExternalContext()
                .getSessionMap().get("userRole") != null)) {
            // 2-If there is not a user already loged, then return false
            return true;
        }

        return false;
    }

        ...

What do you think how can i add this feature to my nav bar?

Update

<p:menuitem value="Login" icon="unsecuredimages/login.png" url="login.xhtml" rendered ="securityController.checkLogged"/>
            <p:menuitem value="Logout" icon="unsecuredimages/logout.png" action="securityController.logOut()" rendered ="!securityController.checkLogged"/>

i also changed to:

public boolean isCheckLogged() {
        return authentificationEJB.checkAuthentificationStatus();
    }

This is how the navigation looks like. As you see i don't see login or logout icons.

How can i fix it?

---

Instead of c:if use the rendered attribute of p:menuitem (or any other primefaces component).

Like this:

<p:menuitem value="Login" icon="unsecuredimages/login.png" url="login.xhtml" rendered="#{securityController.checkLogged}"/>
<p:menuitem value="Logout" icon="unsecuredimages/logout.png" action="securityController.logOut()" rendered="#{!securityController.checkLogged}"/>

You will need a getCheckLogged() or isCheckLogged() method in your securityController bean. So:

public boolean getCheckLogged() {
    return authentificationEJB.checkAuthentificationStatus();
}

EL will translate the securityController.checkLogged attribute reference to a getter method call by naming convention.