Well, if you get a NPE on this line:
>> user.getState().equals("admin")
then either "user" or "getState()" is null, right?
And, since "user" is definitely not null, your private String "state" is
obviously null.
Perhaps you should add something like this:
>> private String state = "initial state";
Martin
On Tue, 12 Sep 2006 15:52:25 +0200, Michael Wölm <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Sadly, nobody have helped me with my problem. I dont know why. Am I too noob
> or is my question incomprehensible? I would be pleased, if anybody could
> give me an advice for my problem.
>
> Greettings from Germany,
> Michael Wölm
>
> Original message is under this.
>
> -----Ursprüngliche Nachricht-----
> Von: m-woelm [mailto:[EMAIL PROTECTED]
> Gesendet: Sonntag, 10. September 2006 16:13
> An: 'Tapestry users'
> Betreff: Question: Can not get access to object fields (Null Pointer
> Exception)
>
> Hi,
>
> I hope anybody could explain me why I get a Null Pointer Exception, if I
> want to get access to a field of an object. My method is similar to the
> eshop-project of the book “Enjoying web dev with Tapestry”.
>
> I tried to change the Listener-method onLogin as follows:
>
>public void onLogin(IRequestCycle cycle) {
>
> try {
>
> User user = Users.getKnownUsers().getUser(email,password);
>
> getUser().copyFrom(user);
>
> if (user.getState().equals("admin"))
> cycle.activate("Admin_Konsole");
>
> else cycle.activate("User_Konsole");
>
> } catch (AuthenticationException e) {
>
> ValidationDelegate delegate = getDelegate();
>
> delegate.setFormComponent(null);
>
> delegate.record("Login failed", null);
>
> }
>
> }
>
>
> Now I get an exception at point (user.getState().equals(“admin”)).
>
> But why? user was set to the login-user two lines before? Why I can’t get
> the field: private String state which I have set in User.class:
>
>
> private String state;
>
> public String getState() {
>
> return this.state;
>
> }
>
>
> Thx ahead!
>
> Michael Wölm
>
>
> <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED]
>
> Public Key: <http://gsg.ath.cx/~phoenix/downloads/MyPublicKey.asc>
> href="http://gsg.ath.cx/~phoenix/downloads/MyPublicKey.asc
>
>
>
>
>
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