Okay. I can aggree on having the toLuceneQuery(...) method in DeletionQuery.

For the toString(...) and fromString(...) methods (or anything similar to this) I don't really want these to be handled via serialization. Furthermore I think that the toString(...) and fromString(...) methods have to stay in the same place, maybe just don't make them inner classes of DeleteByQuerySupport but a separate class encapsulating that logic.

Would you be okay with that?