Abstract decorator class for a DocIdSet implementation that provides on-demand filtering/validation mechanism on a given DocIdSet.

Technically, this same functionality could be achieved with ChainedFilter (under contrib/misc), however the benefit of this class is it never materializes the full bitset for the filter. Instead, the {@link #match} method is invoked on-demand, per docID visited during searching. If you know few docIDs will be visited, and the logic behind {@link #match} is relatively costly, this may be a better way to filter than ChainedFilter.

public abstract class FilteredDocIdSet : DocIdSet

Public MustInherit Class FilteredDocIdSet _
	Inherits DocIdSet

public ref class FilteredDocIdSet abstract : public DocIdSet