So reading the docs for Plucene::Search::Query, it looks like scorers plug into queries. Usually they are baked into subclasses of Query in the _scorer method. The query in turn gets sent into IndexSearcher 's search_top (source) which returns the top scoring results for that query (using that query's scorer).

But since that does not quite track your code sample, I'm not certain if that's the use case, and thus the info you are looking for