/// <summary>Skips to the first match beyond the current whose document number is
/// greater than or equal to a given target.
/// <br>When this method is used the {@link #Explain(int)} method should not be used.
/// </summary>
/// <param name="target">The target document number.
/// </param>
/// <returns> true iff there is such a match.
/// </returns>
public override bool SkipTo(int target)
{
if (firstTime)
{
firstTime = false;
if (!exclScorer.SkipTo(target))
{
exclScorer = null; // exhausted
}
}
if (reqScorer == null)
{
return(false);
}
if (exclScorer == null)
{
return(reqScorer.SkipTo(target));
}
if (!reqScorer.SkipTo(target))
{
reqScorer = null;
return(false);
}
return(ToNonExcluded());
}
/// <summary>Returns the score of the current document matching the query.
/// Initially invalid, until {@link #next()} is called the first time.
/// </summary>
/// <returns> The score of the required scorer, eventually increased by the score
/// of the optional scorer when it also matches the current document.
/// </returns>
public override float Score()
{
int curDoc = reqScorer.Doc();
float reqScore = reqScorer.Score();
if (firstTimeOptScorer)
{
firstTimeOptScorer = false;
if (!optScorer.SkipTo(curDoc))
{
optScorer = null;
return(reqScore);
}
}
else if (optScorer == null)
{
return(reqScore);
}
else if ((optScorer.Doc() < curDoc) && (!optScorer.SkipTo(curDoc)))
{
optScorer = null;
return(reqScore);
}
// assert (optScorer != null) && (optScorer.doc() >= curDoc);
return((optScorer.Doc() == curDoc) ? reqScore + optScorer.Score() : reqScore);
}
/// <summary>Skips to the first match beyond the current whose document number is
/// greater than or equal to a given target.
/// <br>When this method is used the {@link #Explain(int)} method should not be used.
/// <br>The implementation uses the skipTo() method on the subscorers.
/// </summary>
/// <param name="target">The target document number.
/// </param>
/// <returns> true iff there is such a match.
/// </returns>
public override bool SkipTo(int target)
{
if (scorerQueue == null)
{
InitScorerQueue();
}
if (scorerQueue.Size() < minimumNrMatchers)
{
return(false);
}
if (target <= currentDoc)
{
target = currentDoc + 1;
}
do
{
Scorer top = (Scorer)scorerQueue.Top();
if (top.Doc() >= target)
{
return(AdvanceAfterCurrent());
}
else if (top.SkipTo(target))
{
scorerQueue.AdjustTop();
}
else
{
scorerQueue.Pop();
if (scorerQueue.Size() < minimumNrMatchers)
{
return(false);
}
}
}while (true);
}
/// <summary>Skips to the first match beyond the current whose document number is
/// greater than or equal to a given target.
///
/// <p>When this method is used the {@link #Explain(int)} method should not be used.
///
/// </summary>
/// <param name="target">The target document number.
/// </param>
/// <returns> true iff there is such a match.
/// </returns>
public override bool SkipTo(int target)
{
if (countingSumScorer == null)
{
InitCountingSumScorer();
}
return(countingSumScorer.SkipTo(target));
}
// inherit javadoc
public override void Search(Weight weight, Filter filter, HitCollector results)
{
Scorer scorer = weight.Scorer(reader);
if (scorer == null)
{
return;
}
if (filter == null)
{
scorer.Score(results);
return;
}
DocIdSetIterator filterDocIdIterator = filter.GetDocIdSet(reader).Iterator(); // CHECKME: use ConjunctionScorer here?
bool more = filterDocIdIterator.Next() && scorer.SkipTo(filterDocIdIterator.Doc());
while (more)
{
int filterDocId = filterDocIdIterator.Doc();
if (filterDocId > scorer.Doc() && !scorer.SkipTo(filterDocId))
{
more = false;
}
else
{
int scorerDocId = scorer.Doc();
if (scorerDocId == filterDocId) // permitted by filter
{
results.Collect(scorerDocId, scorer.Score());
more = filterDocIdIterator.Next();
}
else
{
more = filterDocIdIterator.SkipTo(scorerDocId);
}
}
}
}
public override bool SkipTo(int docNr)
{
return(scorer.SkipTo(docNr));
}
public override bool SkipTo(int target)
{
return(reqScorer.SkipTo(target));
}