Hello, I wanted to use Collection_SumFunction.calculateSum(featureCollection, attribute) to get the sum of the attribute in the FeatureCollection, but I got a NullPointerException in SubFeatureCollection.accepts(FeatureVisitor, ProgressListener) when executing progress.complete(). My workaround is to pass a NullProgressListener as can be seen in the following code snippet: >>> SumVisitor sv = new SumVisitor(attributeName, featureCollection.getSchema()); featureCollection.accepts(sv, new NullProgressListener()); <<< In SubFeatureCollection.accepts(FeatureVisitor, ProgressListener) the check, if null is passed as listener is commented out. I assume, this is my problem. So my questions are: Is it done by purpose? Or do I try to use the Collection_SumFunction in a wrong way? Anyway, I can work with the workaround, I just wanted to be sure to understand the Collection_SumFunction class right.
Regards, Kerstin Sälzer ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
