public OneComparatorNonScoringCollector(FieldValueHitQueue queue, int numHits, bool fillFields) : base(queue, numHits, fillFields)
{
comparator = queue.GetComparators()[0];
reverseMul = queue.GetReverseMul()[0];
}
/// <summary> Creates a new <see cref="TopFieldCollector" /> from the given
/// arguments.
///
/// <p/><b>NOTE</b>: The instances returned by this method
/// pre-allocate a full array of length
/// <c>numHits</c>.
///
/// </summary>
/// <param name="sort">the sort criteria (SortFields).
/// </param>
/// <param name="numHits">the number of results to collect.
/// </param>
/// <param name="fillFields">specifies whether the actual field values should be returned on
/// the results (FieldDoc).
/// </param>
/// <param name="trackDocScores">specifies whether document scores should be tracked and set on the
/// results. Note that if set to false, then the results' scores will
/// be set to Float.NaN. Setting this to true affects performance, as
/// it incurs the score computation on each competitive result.
/// Therefore if document scores are not required by the application,
/// it is recommended to set it to false.
/// </param>
/// <param name="trackMaxScore">specifies whether the query's maxScore should be tracked and set
/// on the resulting <see cref="TopDocs" />. Note that if set to false,
/// <see cref="TopDocs.MaxScore" /> returns Float.NaN. Setting this to
/// true affects performance as it incurs the score computation on
/// each result. Also, setting this true automatically sets
/// <c>trackDocScores</c> to true as well.
/// </param>
/// <param name="docsScoredInOrder">specifies whether documents are scored in doc Id order or not by
/// the given <see cref="Scorer" /> in <see cref="Collector.SetScorer(Scorer)" />.
/// </param>
/// <returns> a <see cref="TopFieldCollector" /> instance which will sort the results by
/// the sort criteria.
/// </returns>
/// <throws> IOException </throws>
public static TopFieldCollector Create(Sort sort, int numHits, bool fillFields, bool trackDocScores, bool trackMaxScore, bool docsScoredInOrder)
{
if (sort.fields.Length == 0)
{
throw new System.ArgumentException("Sort must contain at least one field");
}
FieldValueHitQueue queue = FieldValueHitQueue.Create(sort.fields, numHits);
if (queue.GetComparators().Length == 1)
{
if (docsScoredInOrder)
{
if (trackMaxScore)
{
return(new OneComparatorScoringMaxScoreCollector(queue, numHits, fillFields));
}
else if (trackDocScores)
{
return(new OneComparatorScoringNoMaxScoreCollector(queue, numHits, fillFields));
}
else
{
return(new OneComparatorNonScoringCollector(queue, numHits, fillFields));
}
}
else
{
if (trackMaxScore)
{
return(new OutOfOrderOneComparatorScoringMaxScoreCollector(queue, numHits, fillFields));
}
else if (trackDocScores)
{
return(new OutOfOrderOneComparatorScoringNoMaxScoreCollector(queue, numHits, fillFields));
}
else
{
return(new OutOfOrderOneComparatorNonScoringCollector(queue, numHits, fillFields));
}
}
}
// multiple comparators.
if (docsScoredInOrder)
{
if (trackMaxScore)
{
return(new MultiComparatorScoringMaxScoreCollector(queue, numHits, fillFields));
}
else if (trackDocScores)
{
return(new MultiComparatorScoringNoMaxScoreCollector(queue, numHits, fillFields));
}
else
{
return(new MultiComparatorNonScoringCollector(queue, numHits, fillFields));
}
}
else
{
if (trackMaxScore)
{
return(new OutOfOrderMultiComparatorScoringMaxScoreCollector(queue, numHits, fillFields));
}
else if (trackDocScores)
{
return(new OutOfOrderMultiComparatorScoringNoMaxScoreCollector(queue, numHits, fillFields));
}
else
{
return(new OutOfOrderMultiComparatorNonScoringCollector(queue, numHits, fillFields));
}
}
}