Hi Paul, One way to implement that would be to use one of the boolean combination > filters in contrib, BooleanFilter or ChainedFilter, and simply count the > the number of times next() returns true on the result.
I am sorry, but I cannot understand: how can I create a BooleanFilter or a ChainedFilter starting from two SortedVIntList objects? I have not found any filter that takes an existing "DocIdSet" in its constructor... However I have seen that Filter interface is very easy to implement. Should I create a custom Filter that wraps my SortedVIntList and than use these filters to create a BooleanFilter? Thanks, Raf
