A base class for all collectors that return a {@link TopDocs} output. This collector allows easy extension by providing a single constructor which accepts a {@link PriorityQueue} as well as protected members for that priority queue and a counter of the number of total hits.
Extending classes can override {@link #TopDocs(int, int)} and {@link #GetTotalHits()} in order to provide their own implementation.

public abstract class TopDocsCollector : Collector

Public MustInherit Class TopDocsCollector _
	Inherits Collector

public ref class TopDocsCollector abstract : public Collector