I have manged to fix this problem partially. It turns out that my getChildlren methods where hard coded to return true/false. This in turn triggered a NPE. It seems that if we getChildren method returns true it means that there has to be some data so not even empty list will work.
Creating DefaultTreeModel as such DefaultTreeModel<ValueWrapper>(encoder, new ValueWrapperAdapter(), assetGroupRootNode.getChildren()); would require a list to be present and even a empty list will throw a NPE. To me this looks like a bug. I have fixed my code so that inner nodes return appropriate value in getChildren method and also I only display the list when I have some data in the list. Please not that using the first constructore would not requre for such check to exist but then I would have one root entry and I dont want that. I guess this should be reported as bug then? Can someone please try out this and double check my findings? Cheers and thanks everyone for help. -- View this message in context: http://tapestry.1045711.n5.nabble.com/NPE-in-Tree-when-I-dont-have-any-data-tp5720289p5720308.html Sent from the Tapestry - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
