static DocIdSet()
{
EMPTY_DOCIDSET = new AnonymousClassDocIdSet();
}
/// <summary>Provide the DocIdSet to be cached, using the DocIdSet provided
/// by the wrapped Filter.
/// This implementation returns the given DocIdSet.
/// </summary>
protected internal virtual DocIdSet DocIdSetToCache(DocIdSet docIdSet, IndexReader reader)
{
if (docIdSet == null)
{
// this is better than returning null, as the nonnull result can be cached
return DocIdSet.EMPTY_DOCIDSET;
}
else if (docIdSet.IsCacheable()) {
return docIdSet;
}
else
{
DocIdSetIterator it = docIdSet.Iterator();
// null is allowed to be returned by iterator(),
// in this case we wrap with the empty set,
// which is cacheable.
return (it == null) ? DocIdSet.EMPTY_DOCIDSET : new OpenBitSetDISI(it, reader.MaxDoc());
}
}
/// <summary> </summary>
/// <param name="docIdSet">The DocIdSet for the Filter
/// </param>
/// <param name="positions">A List of {@link Mono.Lucene.Net.Search.SpanFilterResult.PositionInfo} objects
/// </param>
public SpanFilterResult(DocIdSet docIdSet, System.Collections.IList positions)
{
this.docIdSet = docIdSet;
this.positions = positions;
}
public AnonymousFilteredDocIdSet(DocIdSet innerSet, IndexReader r) : base(innerSet)
{
this.r = r;
}
/// <summary> Constructor.</summary>
/// <param name="innerSet">Underlying DocIdSet
/// </param>
public FilteredDocIdSet(DocIdSet innerSet)
{
_innerSet = innerSet;
}