Yes, we got bitten by this error too.
For some reason, even though you have "include body tag" selected when
creating a new WOComponent in Eclipse/WOLips Beta 3, you get a partial
component. And submitting a form on a partial component generates that
error.
___________________________
Brendan Duddridge
ClickSpace Interactive Inc.
Suite L100
239 - 10th Ave SE
Calgary, AB T2G 0V9
Canada
(403) 277-5591
http://www.clickspace.com/
> From: Chuck Hill <chil..lobal-village.net>
> Date: Tue, 24 Aug 2004 20:31:32 -0700
> To: <womai..ac.com>, <woproject-dev@objectstyle.org>
> Subject: Re: Need a few debugging pointers (no pun intended :)
>
> That is really a very odd error. I've never seen anything quite like that.
> Congratulations! ;-)
>
> Some more of the stack trace might help, but I suspect something is wrong
> with your form bindings.
>
>
> Chuck
>
>
>
> At 11:00 PM 24/08/2004 -0400, womai..ac.com wrote:
>>>>>
> I'm working my way through Apple's Web Apps book, and have run into my
> first debugging challenge. I'm in Chapter 7, the Component Communication
> exercise.
>
> I'm getting a java.lang.NullPointerException when I hit the submit button,
> but that's not really the problem. The problem is that I'm trying to
> figure out how to debug this, and it's eluding me. I had no problems with
> the basic stuff, setting breakpoints and stepping through code. But I'm
> not sure what to do with this error.
>
> I have a function called submitChanges bound to the submit button, and I
> put a breakpoint on the first line, but it's never getting there. The
> stack trace in the console window (I'm using Eclipse 3) looks like this
> (there's more of it but I figured this was enough):
>
> [2004-08-24 22:33:08 EDT] <WorkerThread0>
> <com.webobjects.appserver._private.WOComponentRequestHandler>: Exception
> occurred while handling request:
> java.lang.NullPointerException
> [2004-08-24 22:33:08 EDT] <WorkerThread0> java.lang.NullPointerException
> at
> com.webobjects.appserver._private.WOForm._enterFormInContext(WOForm.java:58)
> at
> com.webobjects.appserver._private.WOForm.takeValuesFromRequest(WOForm.java:69)
>
> The source for WOForm.class and WOComponent.class aren't able to be found
> by Eclipse, and I don't know if it's a configuration snafu on my part or if
> we just treat those as magic black boxes.
>
> So my question is, how do I go about figuring out where my error is? I'll
> gladly RTFM, I just can't find an appropriate FM to R. I have already
> looked at the debugging help in Eclipse but it wasn't detailed enough for
> this situation (or for my state of newbieness, take your pick :).
>
> thanks,
>
> janine
>
> PS thanks to the several people who posted and e-mailed me about how to get
> past the "does not contain a main type" error. Baby steps... ;)
> <<<<
>
>
> --
>
> Chuck Hill chil..lobal-village.net
> Global Village Consulting Inc. http://www.global-village.net
>
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