C# Search.Collector类代码示例

 internal AssertingCollector(Random random, Collector @in, bool inOrder)
 {
     this.Random = random;
     [email protected] = @in;
     this.InOrder = inOrder;
     LastCollected = -1;
 }

 /// <summary> Create a TimeLimitedCollector wrapper over another <see cref="Collector" /> with a specified timeout.</summary>
 /// <param name="collector">the wrapped <see cref="Collector" />
 /// </param>
 /// <param name="timeAllowed">max time allowed for collecting hits after which <see cref="TimeExceededException" /> is thrown
 /// </param>
 public TimeLimitingCollector(Collector collector, long timeAllowed)
 {
     InitBlock();
     this.collector = collector;
     t0 = TIMER_THREAD.GetMilliseconds();
     this.timeout = t0 + timeAllowed;
 }

        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;
            }
        }

 public override bool Score(Collector collector, int max)
 {
     RandomOrderCollector randomCollector = new RandomOrderCollector(Random, collector);
     bool remaining = @in.Score(randomCollector, max);
     randomCollector.Flush();
     return remaining;
 }

		// 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;
		}

		/// <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);
			}
		}

 internal RandomOrderCollector(Random random, Collector @in)
 {
     if ([email protected]())
     {
         throw new System.ArgumentException();
     }
     [email protected] = @in;
     this.Random = random;
     BufferSize = 1 + random.Next(100);
     DocIDs = new int[BufferSize];
     Scores = new float[BufferSize];
     Freqs = new int[BufferSize];
     Buffered = 0;
 }

        // Prevent extension from non-internal classes
        private CachingCollector(Collector other, double maxRAMMB, bool cacheScores)
        {
            this.Other = other;

            CachedDocs = new List<int[]>();
            CurDocs = new int[INITIAL_ARRAY_SIZE];
            CachedDocs.Add(CurDocs);

            int bytesPerDoc = RamUsageEstimator.NUM_BYTES_INT;
            if (cacheScores)
            {
                bytesPerDoc += RamUsageEstimator.NUM_BYTES_FLOAT;
            }
            MaxDocsToCache = (int)((maxRAMMB * 1024 * 1024) / bytesPerDoc);
        }

 public override void Score(Collector collector)
 {
     if (Random.NextBoolean())
     {
         try
         {
             bool remaining = @in.Score(collector, DocsEnum.NO_MORE_DOCS);
             Debug.Assert(!remaining);
         }
         catch (System.NotSupportedException e)
         {
             @in.Score(collector);
         }
     }
     else
     {
         @in.Score(collector);
     }
 }

 public override void Search(Weight weight, Filter filter, Collector collector)
 {
     if (filter == null)
     {
         for (int index = 0; index < this.subReaders.Length; ++index)
         {
             collector.SetNextReader(this.subReaders[index], this.docStarts[index]);
             Scorer scorer = weight.Scorer(this.subReaders[index], !collector.AcceptsDocsOutOfOrder, true);
             if (scorer != null)
                 this.SearchWithScorer(this.subReaders[index], weight, scorer, collector);
         }
     }
     else
     {
         for (int index = 0; index < this.subReaders.Length; ++index)
         {
             collector.SetNextReader(this.subReaders[index], this.docStarts[index]);
             this.SearchWithFilter(this.subReaders[index], weight, filter, collector);
         }
     }
 }

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

			public /*protected internal*/ override bool Score(Collector collector, int max, int firstDocID)
			{
				throw new System.NotSupportedException(Lucene.Net.Search.JustCompileSearch.UNSUPPORTED_MSG);
			}

			public override void  Search(Query query, Filter filter, Collector results)
			{
				throw new System.NotSupportedException(Lucene.Net.Search.JustCompileSearch.UNSUPPORTED_MSG);
			}

		/// <summary>Lower-level search API.
		/// 
		/// <p/><see cref="Collector.Collect(int)" /> is called for every matching document.
		/// 
		/// <p/>Applications should only use this if they need <i>all</i> of the matching
		/// documents. The high-level search API (<see cref="Searcher.Search(Query, int)" />
		/// ) is usually more efficient, as it skips non-high-scoring hits.
		/// <p/>Note: The <c>score</c> passed to this method is a raw score.
		/// In other words, the score will not necessarily be a float whose value is
		/// between 0 and 1.
		/// </summary>
		/// <throws>  BooleanQuery.TooManyClauses </throws>
		public virtual void  Search(Query query, Collector results)
		{
			Search(CreateWeight(query), null, results);
		}

 public override void Search(Weight weight, Filter filter, Collector results)
 {
     throw new System.NotSupportedException();
 }