Since FieldSortedHitQueue was deprecated in 3.0, I'm converting to the new FieldValueHitQueue.
The trouble I'm having is coming up with a way to use FieldValueHitQueue in a Collector so it is decoupled from a TopDocsCollector. What I'd like to do is have a custom Collector that can add objects extended from a FieldDoc to a queue class that extends from FieldValueHitQueue. The problem is FieldValueHitQueue hides its constructor, and uses a package protected static Entry class that extends ScoreDoc and is not visible to any class extending from it. Alternatively I could just modify the classes so I can extend from Entry myself, but I thought there might be a better way to do this I'm not seeing. Is there a way to decouple the FieldValueHitQueue from the Entry so it can take classes extended from FieldDoc types? Also, I noticed that there is a FieldDocSortedHitQueue used with MultiSearcher. Are there any reasons to not use a clone of this class rather than the FieldValueHitQueue?
