Actually, the wrapping of neo4j doesn't work with the latest JCC -- it just doesn't fail obviously. However, some vital methods are not produced for several classes. For instance, the org.neo4j.api.core.Node class doesn't have the vital method "hasRelationship(RelationshipType...)". In fact, it doesn't seem to have a number of methods, like "Iterable<Relationship> getRelationships()".
So, this is (I suppose) a variant of the Java 5 stuff not being supported by PyLucene. Might be nice to have JCC fail more obviously in this case... Bill