C# Collector.SetScorer方法代码示例

		// firstDocID is ignored since nextDoc() sets 'doc'
		public /*protected internal*/ override bool Score(Collector c, int end, int firstDocID)
		{
			c.SetScorer(this);
			while (doc < end)
			{
				// for docs in window
				c.Collect(doc); // collect score
				
				if (++pointer >= pointerMax)
				{
					pointerMax = termDocs.Read(docs, freqs); // refill buffers
					if (pointerMax != 0)
					{
						pointer = 0;
					}
					else
					{
						termDocs.Close(); // close stream
						doc = System.Int32.MaxValue; // set to sentinel value
						return false;
					}
				}
				doc = docs[pointer];
			}
			return true;
		}

        private void SearchWithFilter(IndexReader reader, Weight weight, Filter filter, Collector collector)
        {
            DocIdSet docIdSet = filter.GetDocIdSet(reader);
            if (docIdSet == null)
                return;
            Scorer scorer = weight.Scorer(reader, true, false);
            if (scorer == null)
                return;
            scorer.DocID();

            DocIdSetIterator docIdSetIterator = docIdSet.Iterator();
            if (docIdSetIterator == null)
                return;
            int target = docIdSetIterator.NextDoc();
            int num = scorer.Advance(target);
            collector.SetScorer(scorer);
            while (true)
            {
                while (num != target)
                {
                    if (num > target)
                        target = docIdSetIterator.Advance(num);
                    else
                        num = scorer.Advance(target);
                }
                if (num != DocIdSetIterator.NO_MORE_DOCS && !((GroupCollector)collector).GroupLimitReached)
                {
                    collector.Collect(num);
                    target = docIdSetIterator.NextDoc();
                    num = scorer.Advance(target);
                }
                else
                    break;
            }
        }

		/// <summary>Scores and collects all matching documents.</summary>
		/// <param name="collector">The collector to which all matching documents are passed.
		/// <br/>When this method is used the {@link #Explain(int)} method should not be used.
		/// </param>
		public virtual void  Score(Collector collector)
		{
			collector.SetScorer(this);
			int doc;
			while ((doc = NextDoc()) != NO_MORE_DOCS)
			{
				collector.Collect(doc);
			}
		}

        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>Expert: Collects matching documents in a range.  Hook for optimization.
	    /// Note that <see cref="Next()" /> must be called once before this method is called
	    /// for the first time.
	    /// </summary>
	    /// <param name="collector">The collector to which all matching documents are passed through.
	    /// </param>
	    /// <param name="max">Do not score documents past this.
	    /// </param>
	    /// <param name="firstDocID"></param>
	    /// <returns> true if more matching documents may remain.
	    /// </returns>
	    public /*protected internal*/ override bool Score(Collector collector, int max, int firstDocID)
		{
			// firstDocID is ignored since nextDoc() sets 'currentDoc'
			collector.SetScorer(this);
			while (currentDoc < max)
			{
				collector.Collect(currentDoc);
				if (NextDoc() == NO_MORE_DOCS)
				{
					return false;
				}
			}
			return true;
		}

		// firstDocID is ignored since nextDoc() initializes 'current'
		public /*protected internal*/ override bool Score(Collector collector, int max, int firstDocID)
		{
			bool more;
			Bucket tmp;
			BucketScorer bs = new BucketScorer();
			// The internal loop will set the score and doc before calling collect.
			collector.SetScorer(bs);
			do 
			{
				bucketTable.first = null;
				
				while (current != null)
				{
					// more queued 
					
					// check prohibited & required
					if ((current.bits & prohibitedMask) == 0 && (current.bits & requiredMask) == requiredMask)
					{
						
						if (current.doc >= max)
						{
							tmp = current;
							current = current.next;
							tmp.next = bucketTable.first;
							bucketTable.first = tmp;
							continue;
						}
						
						if (current.coord >= minNrShouldMatch)
						{
							bs.score = current.score * coordFactors[current.coord];
							bs.doc = current.doc;
							collector.Collect(current.doc);
						}
					}
					
					current = current.next; // pop the queue
				}
				
				if (bucketTable.first != null)
				{
					current = bucketTable.first;
					bucketTable.first = current.next;
					return true;
				}
				
				// refill the queue
				more = false;
				end += BucketTable.SIZE;
				for (SubScorer sub = scorers; sub != null; sub = sub.next)
				{
					int subScorerDocID = sub.scorer.DocID();
					if (subScorerDocID != NO_MORE_DOCS)
					{
						more |= sub.scorer.Score(sub.collector, end, subScorerDocID);
					}
				}
				current = bucketTable.first;
			}
			while (current != null || more);
			
			return false;
		}

		public /*protected internal*/ override bool Score(Collector collector, int max, int firstDocID)
		{
			doc = firstDocID;
			collector.SetScorer(this);
			while (doc < max)
			{
				collector.Collect(doc);
				doc = countingSumScorer.NextDoc();
			}
			return doc != NO_MORE_DOCS;
		}

        public override void Search(Weight weight, Filter filter, Collector results)
        {
            IndexReader reader = IndexReader;

            Scorer scorer = weight.Scorer(reader, true, false);

            if (scorer == null)
            {
                return;
            }

            results.SetScorer(scorer);
            results.SetNextReader(reader, 0);

            FacetValidator validator = CreateFacetValidator();
            int target = 0;
            bool more;

            if (filter == null)
            {
                more = scorer.NextDoc()!=DocIdSetIterator.NO_MORE_DOCS;
                while (more)
                {
                    target = scorer.DocID();
                    if (validator.Validate(target))
                    {
                        results.Collect(target);
                        more = scorer.NextDoc()!=DocIdSetIterator.NO_MORE_DOCS;
                    }
                    else
                    {
                        target = validator.NextTarget;
                        more = scorer.Advance(target) != DocIdSetIterator.NO_MORE_DOCS;
                    }
                }
                return;
            }

            DocIdSetIterator filterDocIdIterator = filter.GetDocIdSet(reader).Iterator(); // CHECKME: use ConjunctionScorer here?

            target = filterDocIdIterator.NextDoc();
            if (target == DocIdSetIterator.NO_MORE_DOCS)
            {
                return;
            }

            int doc = -1;
            while (true)
            {
                if (doc < target)
                {
                    doc = scorer.Advance(target);
                    if (doc == DocIdSetIterator.NO_MORE_DOCS)
                    {
                        break;
                    }
                }

                if (doc == target) // permitted by filter
                {
                    if (validator.Validate(doc))
                    {
                        results.Collect(doc);

                        target = filterDocIdIterator.NextDoc();
                        if (target == DocIdSetIterator.NO_MORE_DOCS)
                        {
                            break;
                        }
                        else
                        {
                            continue;
                        }
                    }
                    else
                    {
                        // skip to the next possible docid
                        target = validator.NextTarget;
                    }
                }
                else // doc > target
                {
                    target = doc;
                }

                target = filterDocIdIterator.Advance(target);
                if (target == DocIdSetIterator.NO_MORE_DOCS)
                {
                    break;
                }
            }
        }

        private void SearchWithScorer(IndexReader reader, Weight weight, Scorer scorer, Collector collector)
        {
            if (scorer == null)
                return;
            scorer.DocID();

            int num = scorer.NextDoc(); ;
            collector.SetScorer(scorer);
            while (true)
            {

                if (num != DocIdSetIterator.NO_MORE_DOCS && !((GroupCollector)collector).GroupLimitReached)
                {
                    collector.Collect(num);
                    num = scorer.NextDoc();
                }
                else
                    break;
            }
        }

 private void SearchWithFilter(IndexReader reader, Weight weight, Scorer scorer, Collector collector)
 {
     if (scorer == null)
         return;
     scorer.DocID();
     DocIdSetIterator docIdSetIterator = scorer;
     if (docIdSetIterator == null)
         return;
     int target = docIdSetIterator.NextDoc();
     int num = target;
       //  int num = scorer.Advance(target);
     collector.SetScorer(scorer);
     while (true)
     {
         //while (num != target)
         //{
         //    if (num > target)
         //        target = docIdSetIterator.Advance(num);
         //    else
         //        num = scorer.Advance(target);
         //}
         if (num != DocIdSetIterator.NO_MORE_DOCS && !((BloclGroupingCollector) collector).GroupLimitReached)
         {
             collector.Collect(num);
             num = docIdSetIterator.NextDoc();
             //target = docIdSetIterator.NextDoc();
             //num = scorer.Advance(target);
         }
         else
             break;
     }
 }

        public override void Search(Weight weight, Filter filter, Collector results)
        {
            IndexReader reader = IndexReader;

            bool doValidate = false;
            FacetHitCollector[] facetCollectors = this.facetCollectors.ToArray();
            foreach (FacetHitCollector facetCollector in facetCollectors)
            {
                if (facetCollector.PostDocIDSetIterator != null)
                {
                    doValidate = true;
                    break;
                }
            }

            Scorer scorer = weight.Scorer(reader, true, false);
            if (scorer == null)
            {
                return;
            }

            results.SetScorer(scorer);

            if (filter == null)
            {
                while (scorer.NextDoc()!=DocIdSetIterator.NO_MORE_DOCS)
                {
                    int doc = scorer.DocID();
                    if (validateAndIncrement(doc, facetCollectors, doValidate))
                    {
                        results.Collect(doc);
                    }
                }
                return;
            }

            DocIdSetIterator filterDocIdIterator = filter.GetDocIdSet(reader).Iterator(); // CHECKME: use ConjunctionScorer here?

            bool more = filterDocIdIterator.NextDoc() != DocIdSetIterator.NO_MORE_DOCS && scorer.Advance(filterDocIdIterator.DocID()) != DocIdSetIterator.NO_MORE_DOCS;

            while (more)
            {
                int filterDocId = filterDocIdIterator.DocID();
                if (filterDocId > scorer.DocID() && scorer.Advance(filterDocId)==DocIdSetIterator.NO_MORE_DOCS)
                {
                    more = false;
                }
                else
                {
                    int scorerDocId = scorer.DocID();
                    if (scorerDocId == filterDocId) // permitted by filter
                    {
                        if (validateAndIncrement(scorerDocId, facetCollectors, doValidate))
                        {
                            results.Collect(scorerDocId);
                        }
                        more = filterDocIdIterator.NextDoc()!=DocIdSetIterator.NO_MORE_DOCS;
                    }
                    else
                    {
                        more = filterDocIdIterator.Advance(scorerDocId) != DocIdSetIterator.NO_MORE_DOCS;
                    }
                }
            }
        }