Re: re: NullPointerException in FourColorTree using UniqueList

Kevin Day wrote:

Just a thought, probably doesn't apply in this case, but I figured it wouldn't hurt to ask:
 
Are you adding elements directly to the unique list, or to the ThreadSafeList?  If you are adding directly to any list except the ThreadSafeList, are you using proper locking semantics on the list pipeline?
 
- K
 

----------------------- Original Message -----------------------
  
From: ernieyu <eyu@limewire.com>
To:  users@glazedlists.dev.java.net
Cc: 
Date: Fri, 15 May 2009 09:46:11 -0700 (PDT)
Subject: NullPointerException in FourColorTree using UniqueList
  
Hi, We sometimes get an NPE in FourColorTree from within UniqueList.  We are using version 1.7.0. java.lang.NullPointerException    at ca.odell.glazedlists.impl.adt.barcode2.FourColorTree.convertIndexColor(FourColorTree.java:875)    at ca.odell.glazedlists.event.Tree4Deltas.update(Tree4Deltas.java:73)    at ca.odell.glazedlists.event.ListEventAssembler$Tree4DeltasAssembler.addChange(ListEventAssembler.java:545)    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:150)    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:156)    at ca.odell.glazedlists.event.ListEventAssembler.addUpdate(ListEventAssembler.java:174)    at ca.odell.glazedlists.UniqueList$GrouperClient.groupChanged(UniqueList.java:108)    at ca.odell.glazedli
 sts.impl.Grouper.listChanged(Grouper.java:190)    at ca.odell.glazedlists.UniqueList.listChanged(UniqueList.java:209)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:869)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:861)    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher$SubjectAndListener.firePendingEvent(SequenceDependenciesEventPublisher.java:435)    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher.fireEvent(SequenceDependenciesEventPublisher.java:334)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter.fireEvent(ListEventAssembler.java:855)    at ca.odell.glazedlists.event.ListEventAssembler$AssemblerHelper.commi
 tEvent(ListEventAssembler.java:389)    at ca.odell.glazedlists.event.ListEventAssembler.commitEvent(ListEventAssembler.java:226)    at ca.odell.glazedlists.BasicEventList.add(BasicEventList.java:125)    at ca.odell.glazedlists.impl.ThreadSafeList.add(ThreadSafeList.java:178) It is difficult to reproduce, but we think it occurs when a new element is added to the unique list. All events should be occuring on the Swing EDT. Our complete list chain is long, and we feed list selection back into the chain at FilterList1: ThreadSafeList -> GroupingList -> FunctionList -> ObservableList -> FilterList1 -> FunctionList -> FilterList2 -> UniqueList -> SortedList -> EventSelectionModel -> Matcher -> MatcherEditor -> FilterList1 I'm thinking about writing my own code to replace the UniqueList piece. Any suggestions would be appreciated. Regards,<
 BR>Ernie Yu -- View this message in context: http://www.nabble.com/NullPointerException-in-FourColorTree-using-UniqueList-tp23563519p23563519.html Sent from the GlazedLists - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@glazedlists.dev.java.net For additional commands, e-mail: users-help@glazedlists.dev.java.net

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