NPE raised from SubFeatureList when sorting
-------------------------------------------
Key: GEOT-3244
URL: http://jira.codehaus.org/browse/GEOT-3244
Project: GeoTools
Issue Type: Bug
Components: data
Affects Versions: 2.6.5
Environment: Linux Fedora 12, JDK 1.6.0_17
Reporter: Luca Morandini
Attachments: SubFeatureListTest.java
I wanted to sort a FeatureCollection, hence I wrote something like:
FilterFactory filterFactory = CommonFactoryFinder
.getFilterFactory(null);
SortByImpl sort = (SortByImpl) filterFactory.sort(
BulletinIngestor.NAMECOLUMN, SortOrder.ASCENDING);
SubFeatureList outList = new SubFeatureList(outColl, sort);
Iterator<SimpleFeature> featIter = (Iterator<SimpleFeature>) outList
.openIterator();
But the last line gave me an NPE:
java.lang.NullPointerException
at
org.geotools.feature.collection.SubFeatureList.getFeatureMember(SubFeatureList.java:241)
at
org.geotools.feature.collection.SubFeatureList$1.compare(SubFeatureList.java:149)
at
org.geotools.feature.collection.SubFeatureList$1.compare(SubFeatureList.java:147)
...
I investigated a bit, and it turned out that openIterator() eventually called
createIndex(), which in turn called getFeatureMember(), which relies on the
index
member variable, which is created by createIndex() !
So, unless I got it wrong, I presume there is something flawed in
SubFeatureList,
since it relies on the sorted List to produce the sorted List instead on
relying
the un-sorted Collection.
I solved the issue by subclassing SubFeatureList and overriding
getFeatureMember.
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