I tried sending this once before subscribing to the list, so my apologies if this arrives twice.
It seems that the underlying graph of a TDB-backed named model doesn't support the RenameResource function in ResourceUtils. I get an UnsupportedOperationException when I try to use this, though the exception seems to come from the WrappedIterator/NiceIterator not supporting the remove. Are there known workarounds for this case, or should I implement my own renameResource that uses DELETE SPARQL queries to do the removes? This issue seems like a cousin of: http://tech.groups.yahoo.com/group/jena-dev/message/35431 Stack trace: java.lang.UnsupportedOperationException at com.hp.hpl.jena.util.iterator.WrappedIterator.remove(WrappedIterator.java:76) at com.hp.hpl.jena.util.iterator.NiceIterator$1.remove(NiceIterator.java:109) at com.hp.hpl.jena.util.iterator.WrappedIterator.remove(WrappedIterator.java:77) at com.hp.hpl.jena.util.iterator.FilterIterator.remove(FilterIterator.java:65) at com.hp.hpl.jena.util.ResourceUtils.renameResource(ResourceUtils.java:270) at com.basistech.jug.rdfdb.task.RdfGenerator.mergeEntities(RdfGenerator.java:271) at com.basistech.jug.rdfdb.RdfGeneratorTest.testMergeEntities(RdfGeneratorTest.java:156) Versions: Jena 2.6.4 TDB 0.8.10 I also tried Jena 2.6.5-SNAPSHOT as of June 6, 2011, for kicks. The stacktrace is slightly different, due to a rewrite of RenameResource, but the result is the same UnsupportedOperationException. If it's helpful, I can pack up a unit test to demonstrate that renameResource fails for a TDB-backed model, but works fine on a model created by ModelFactory.createDefaultModel(). Thanks, Steve
