public override Explanation Explain(IndexReader ir, int i)
{
Explanation inner = weight.Explain(ir, i);
if (Enclosing_Instance.Boost != 1)
{
Explanation preBoost = inner;
inner = new Explanation(inner.Value * Enclosing_Instance.Boost, "product of:");
inner.AddDetail(new Explanation(Enclosing_Instance.Boost, "boost"));
inner.AddDetail(preBoost);
}
Filter f = Enclosing_Instance.filter;
DocIdSet docIdSet = f.GetDocIdSet(ir);
DocIdSetIterator docIdSetIterator = docIdSet == null?DocIdSet.EMPTY_DOCIDSET.Iterator() : docIdSet.Iterator();
if (docIdSetIterator == null)
{
docIdSetIterator = DocIdSet.EMPTY_DOCIDSET.Iterator();
}
if (docIdSetIterator.Advance(i) == i)
{
return(inner);
}
else
{
Explanation result = new Explanation(0.0f, "failure to match filter: " + f.ToString());
result.AddDetail(inner);
return(result);
}
}
private void SearchWithFilter(IndexReader reader, Weight weight, Filter filter, Collector collector)
{
System.Diagnostics.Debug.Assert(filter != null);
Scorer scorer = weight.Scorer(reader, true, false);
if (scorer == null)
{
return;
}
int docID = scorer.DocID();
System.Diagnostics.Debug.Assert(docID == -1 || docID == DocIdSetIterator.NO_MORE_DOCS);
// CHECKME: use ConjunctionScorer here?
DocIdSet filterDocIdSet = filter.GetDocIdSet(reader);
if (filterDocIdSet == null)
{
// this means the filter does not accept any documents.
return;
}
DocIdSetIterator filterIter = filterDocIdSet.Iterator();
if (filterIter == null)
{
// this means the filter does not accept any documents.
return;
}
int filterDoc = filterIter.NextDoc();
int scorerDoc = scorer.Advance(filterDoc);
collector.SetScorer(scorer);
while (true)
{
if (scorerDoc == filterDoc)
{
// Check if scorer has exhausted, only before collecting.
if (scorerDoc == DocIdSetIterator.NO_MORE_DOCS)
{
break;
}
collector.Collect(scorerDoc);
filterDoc = filterIter.NextDoc();
scorerDoc = scorer.Advance(filterDoc);
}
else if (scorerDoc > filterDoc)
{
filterDoc = filterIter.Advance(scorerDoc);
}
else
{
scorerDoc = scorer.Advance(filterDoc);
}
}
}
/// <summary> Perform an inplace AND with the doc ids from a given DocIdSetIterator,
/// leaving only the bits set for which the doc ids are in common.
/// These doc ids should be smaller than the maximum size passed to the
/// constructor.
/// </summary>
public virtual void InPlaceAnd(DocIdSetIterator disi)
{
int bitSetDoc = NextSetBit(0);
int disiDoc;
while (bitSetDoc != - 1 && (disiDoc = disi.Advance(bitSetDoc)) != DocIdSetIterator.NO_MORE_DOCS)
{
Clear(bitSetDoc, disiDoc);
bitSetDoc = NextSetBit(disiDoc + 1);
}
if (bitSetDoc != - 1)
{
Clear(bitSetDoc, Size());
}
}
public override int Advance(int target)
{
return(docIdSetIterator.Advance(target));
}
