Oh I see...So robot doesn't get the whole wavelet with all of the blips, but the blip of the related event and it's parent. Ok, but if I would like to access to the rootblip, and I get its id with wavelet.getRootBlipId(), how can I request its content (getDoucment().getText())? (wavelet.getRootBlip().getDocument().getText() also throws null exception in these cases, so I don't have any idea how to achieve this)
Thanks for your guidance! On Fri, Oct 23, 2009 at 2:56 AM, Austin Chau (Google employee) < api.aus...@google.com> wrote: > Hi, > To get the root blip id in your scenario - > > wave.appendBlip().getDocument().append(wavelet.getRootBlipId()); > > This would work because it does not require "context" of a grandparent > blip. The reason that you are getting exception is because the context > associated with an event callback only goes back its immediate parent. So > in your case if the triggering event is resulted from a grandchild blip away > from root, it will no longer has context to recreate the root blip when you > invoked wavelet.getRootBlip() - thus you will get a null reference. > > Hope it helps, > Austin > > 2009/10/22 Bálint Kriván <bal...@google.com> > > Reply to myself and others: I think this is related to >> http://code.google.com/p/google-wave-resources/issues/detail?id=200 . >> >> 2009/10/22 Bálint Kriván <bal...@krivan.info> >> >> Hi! >>> I have this little chunk of code: >>> >>> public void debug(RobotMessageBundle bundle, String msg) >>> >>> { >>> >>> List<String> list = new ArrayList(); >>> >>> list.add("<myaddress in google wave>"); >>> >>> Wavelet wave = bundle.createWavelet(list); >>> >>> wave.appendBlip().getDocument().append(msg); >>> >>> } >>> >>> @Override >>> >>> public void processEvents(RobotMessageBundle robotMessageBundle) { >>> >>> Wavelet wavelet = robotMessageBundle.getWavelet(); >>> >>> for (Event event : robotMessageBundle.getEvents()) { >>> >>> Blip currentBlip = event.getBlip(); >>> >>> switch (event.getType()) { >>> >>> case BLIP_SUBMITTED: >>> >>> debug(robotMessageBundle, >>>> String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46! >>> >>> } >>> >>> } >>> >>> } >>> >>> >>> So when I add a blip to the wavelet where the robot is, it should open a >>> new wave with me and send the id of the root blip (The top blip in the >>> wavelet). >>> But if this blip isn't right after the root blip (so the very first Reply >>> button) then I've got a NullPointerException: >>> >>> java.lang.NullPointerException >>> >>> at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56) >>> >>> at robot.MainServlet.processEvents(MainServlet.java:46) >>> >>> at >>>> com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:89) >>> >>> [...] >>> >>> >>> What is the recommended way to access the very first blip (which is I >>> guess the RootBlip)? >>> >>> Thanks for your help! >>> >>> -- >>> Üdv, >>> Kriván Bálint >>> >> >> >> >> -- >> Üdv, >> Kriván Bálint >> >> >> > > > > -- Üdv, Kriván Bálint --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Wave API" group. To post to this group, send email to google-wave-api@googlegroups.com To unsubscribe from this group, send email to google-wave-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-wave-api?hl=en -~----------~----~----~----~------~----~------~--~---
