The return type of RdfSource.optimizeQuery(Query query) is currently void. This makes it impossible to do query optimizations that require replacement of the query model.
It would therefore be an improvement if the return type was changed to Query. This would have minimal impact on existing implementations, and would enable complete replacement of one query model by another during optimization.
Improvement
Closed
Minor
return type of RdfSource.optimizeQuery(...) should be Query