// this should not happen but just in case
return new ComplexExplanation(false, 0.0f, "nothing matched");
}
// TODO: this isn't right? I.e., we are incorrectly pretending all first pass hits were rescored? If the requested docID was
// beyond the top rescoreContext.window() in the first pass hits, we don't rescore it now?
Explanation rescoreExplain = searcher.explain(rescore.query(), topLevelDocId);
float primaryWeight = rescore.queryWeight();
ComplexExplanation prim = new ComplexExplanation(sourceExplanation.isMatch(),
sourceExplanation.getValue() * primaryWeight,
"product of:");
prim.addDetail(sourceExplanation);