public Medidas(TopDocs hits, Searcher searcher, List<int> docs)
 {
     this.qtdDocsRelevantesRetornados = DocsRelevantesRecuperados(hits, searcher, docs);
     this.precisao = _Precisao(hits.ScoreDocs.Length);
     this.cobetura = _Cobertura(docs.Count);
     this.fmeasure = _FMeasure();
 }

 /// <summary>
 ///     Initializes a new instance of the <see cref="SearchResults" /> class.
 /// </summary>
 /// <param name="searcher">The searcher.</param>
 /// <param name="reader">The reader.</param>
 /// <param name="docs">The hits.</param>
 /// <param name="criteria">The criteria.</param>
 /// <param name="query">The query.</param>
 public LuceneSearchResults(Searcher searcher, IndexReader reader, TopDocs docs, ISearchCriteria criteria, Query query)
 {
     Results = new SearchResults(criteria, null);
     CreateDocuments(searcher, docs);
     CreateFacets(reader, query);
     CreateSuggestions(reader, criteria);
 }

        private static void GetResults(ref List<Airport> itemsList, TopDocs results, Searcher searcher)
        {
            foreach (ScoreDoc scoreDoc in results.ScoreDocs)
            {
                var item = new Airport();
                Document doc = searcher.Doc(scoreDoc.Doc);
                item.id = doc.Get("Code");
                item.label = doc.Get("CityName") + " - " + doc.Get("Name") + " (" +
                             doc.Get("Code") + ")";
                item.value = doc.Get("CityName") + " - " + doc.Get("Name") + " (" +
                             doc.Get("Code") + ")";

                itemsList.Add(item);
            }
        }

 public static bool HitsIncludeTitle(IndexSearcher searcher, TopDocs topDocs, String title)
 {
     foreach (var scoreDoc in topDocs.ScoreDocs)
     {
         var doc = searcher.Doc(scoreDoc.Doc);
         var docTitle = doc.Get("title");
         var decodedTitle = DecodeEncodedNonAsciiCharacters(docTitle);
         if (decodedTitle.Equals(title))
         {
             return true;
         }
     }
     Console.WriteLine("title '" + title + "' not found");
     return false;
 }

        /// <summary>
        /// Creates result document collection from Lucene documents.
        /// </summary>
        /// <param name="searcher">The searcher.</param>
        /// <param name="topDocs">The hits.</param>
        private void CreateDocuments(Searcher searcher, TopDocs topDocs)
        {
            // if no documents found return
            if (topDocs == null)
                return;

            var entries = new List<ResultDocument>();

            // get total hits
            var totalCount = topDocs.TotalHits;
            var recordsToRetrieve = Results.SearchCriteria.RecordsToRetrieve;
            var startIndex = Results.SearchCriteria.StartingRecord;
            if (recordsToRetrieve > totalCount)
                recordsToRetrieve = totalCount;

            for (var index = startIndex; index < startIndex + recordsToRetrieve; index++)
            {
                if (index >= totalCount)
                    break;

                var document = searcher.Doc(topDocs.ScoreDocs[index].Doc);
                var doc = new ResultDocument();

                var documentFields = document.GetFields();
                using (var fi = documentFields.GetEnumerator())
                {
                    while (fi.MoveNext())
                    {
                        if (fi.Current != null)
                        {
                            var field = fi.Current;
                            doc.Add(new DocumentField(field.Name, field.StringValue));
                        }
                    }
                }

                entries.Add(doc);
            }

            var searchDocuments = new ResultDocumentSet
            {
                Name = "Items",
                Documents = entries.OfType<IDocument>().ToArray(),
                TotalCount = totalCount
            };

            Results.Documents = new[] { searchDocuments };
        }

        private int DocsRelevantesRecuperados(TopDocs hits, Searcher searcher, List<int> docs)
        {
            int qtd = 0;

            foreach (ScoreDoc scoreDoc in hits.ScoreDocs)
            {
                Document doc = searcher.GetDocument(scoreDoc);
                string docId = doc.Get(Constants.FILE_NAME);
                string number = docId.Substring(docId.IndexOf('(')+1, docId.IndexOf(')') - docId.IndexOf('(') - 1);
                int num = Int32.Parse(number);

                if (docs.Contains(num))
                    qtd++;
            }

            return qtd;
        }

        public void WriteV2ResultTest(
            string indexName,
            int numDocs,
            Dictionary<string, string> commitUserData,
            int topDocsTotalHits,
            float topDocsMaxScore,
            int skip,
            int take,
            string expected)
        {
            var searcher = new MockSearcher(indexName, numDocs, commitUserData, versions: Constants.VersionResults);
            var topDocs = new TopDocs(topDocsTotalHits, Constants.ScoreDocs, topDocsMaxScore);

            var sb = new StringBuilder();
            var sw = new StringWriter(sb);

            using (var writer = new JsonTextWriter(sw))
            {
                ResponseFormatter.WriteV2Result(writer, searcher, topDocs, skip, take);

                Assert.Equal(expected, sb.ToString());
            }
        }

        /// <summary> A search implementation which executes each
        /// <see cref="Searchable"/> in its own thread and waits for each search to complete
        /// and merge the results back together.
        /// </summary>
        public override TopDocs Search(Weight weight, Filter filter, int nDocs)
        {
            HitQueue hq = new HitQueue(nDocs, false);
            object lockObj = new object();

            TopDocs[] results = new TopDocs[searchables.Length];
            //search each searchable
            Parallel.For(0, searchables.Length, (i) => results[i] = MultiSearcherCallableNoSort(ThreadLock.MonitorLock, lockObj, searchables[i], weight, filter,
                                                                            nDocs, hq, i, starts));
            int totalHits = 0;
            float maxScore = float.NegativeInfinity;

            foreach (TopDocs topDocs in results)
            {
                totalHits += topDocs.TotalHits;
                maxScore = Math.Max(maxScore, topDocs.MaxScore);
            }

            ScoreDoc[] scoreDocs = new ScoreDoc[hq.Size()];
            for (int i = hq.Size() - 1; i >= 0; i--) // put docs in array
                scoreDocs[i] = hq.Pop();

            return new TopDocs(totalHits, scoreDocs, maxScore);
        }

        private void CompareHits(IndexReader r, IndexReader joinR, TopDocs results, TopGroups<int> joinResults)
        {
            // results is 'complete'; joinResults is a subset
            int resultUpto = 0;
            int joinGroupUpto = 0;

            ScoreDoc[] hits = results.ScoreDocs;
            IGroupDocs<int>[] groupDocs = joinResults.Groups;

            while (joinGroupUpto < groupDocs.Length)
            {
                IGroupDocs<int> group = groupDocs[joinGroupUpto++];
                ScoreDoc[] groupHits = group.ScoreDocs;
                assertNotNull(group.GroupValue);
                Document parentDoc = joinR.Document(group.GroupValue);
                string parentID = parentDoc.Get("parentID");
                //System.out.println("GROUP groupDoc=" + group.groupDoc + " parent=" + parentDoc);
                assertNotNull(parentID);
                assertTrue(groupHits.Length > 0);
                for (int hitIDX = 0; hitIDX < groupHits.Length; hitIDX++)
                {
                    Document nonJoinHit = r.Document(hits[resultUpto++].Doc);
                    Document joinHit = joinR.Document(groupHits[hitIDX].Doc);
                    assertEquals(parentID, nonJoinHit.Get("parentID"));
                    assertEquals(joinHit.Get("childID"), nonJoinHit.Get("childID"));
                }

                if (joinGroupUpto < groupDocs.Length)
                {
                    // Advance non-join hit to the next parentID:
                    //System.out.println("  next joingroupUpto=" + joinGroupUpto + " gd.Length=" + groupDocs.Length + " parentID=" + parentID);
                    while (true)
                    {
                        assertTrue(resultUpto < hits.Length);
                        if (!parentID.Equals(r.Document(hits[resultUpto].Doc).Get("parentID")))
                        {
                            break;
                        }
                        resultUpto++;
                    }
                }
            }
        }

		private IEnumerable<IAuditEntry> getResults(TopDocs ids, int page, IndexSearcher searcher)
		{
			int skip = page*20;
			return ids.ScoreDocs.Reverse().Skip(skip).Take(20).Select(x => new BasicAuditEntry(searcher.Doc(x.Doc), x.Doc));
		} 

		// since custom scoring modifies the order of docs, map results 
		// by doc ids so that we can later compare/verify them 
		private System.Collections.Hashtable TopDocsToMap(TopDocs td)
		{
			System.Collections.Hashtable h = new System.Collections.Hashtable();
			for (int i = 0; i < td.TotalHits; i++)
			{
				h[(System.Int32) td.ScoreDocs[i].Doc] = (float) td.ScoreDocs[i].Score;
			}
			return h;
		}

        private void CompareChildHits(IndexReader r, IndexReader joinR, TopDocs results, TopDocs joinResults)
        {
            assertEquals(results.TotalHits, joinResults.TotalHits);
            assertEquals(results.ScoreDocs.Length, joinResults.ScoreDocs.Length);
            for (int hitCount = 0; hitCount < results.ScoreDocs.Length; hitCount++)
            {
                ScoreDoc hit = results.ScoreDocs[hitCount];
                ScoreDoc joinHit = joinResults.ScoreDocs[hitCount];
                Document doc1 = r.Document(hit.Doc);
                Document doc2 = joinR.Document(joinHit.Doc);
                assertEquals("hit " + hitCount + " differs", doc1.Get("childID"), doc2.Get("childID"));
                // don't compare scores -- they are expected to differ


                assertTrue(hit is FieldDoc);
                assertTrue(joinHit is FieldDoc);

                FieldDoc hit0 = (FieldDoc)hit;
                FieldDoc joinHit0 = (FieldDoc)joinHit;
                assertArrayEquals(hit0.Fields, joinHit0.Fields);
            }
        }

        public static JToken AutoCompleteMakeResult(IndexSearcher searcher, TopDocs topDocs, int skip, int take, NuGetSearcherManager searcherManager, bool includeExplanation, Query query)
        {
            JArray array = new JArray();

            for (int i = skip; i < Math.Min(skip + take, topDocs.ScoreDocs.Length); i++)
            {
                ScoreDoc scoreDoc = topDocs.ScoreDocs[i];
                Document document = searcher.Doc(scoreDoc.Doc);
                string id = document.Get("Id");

                array.Add(id);
            }

            JObject result = new JObject();

            result.Add("@context", new JObject { { "@vocab", "http://schema.nuget.org/schema#" } });
            result.Add("totalHits", topDocs.TotalHits);
            result.Add("indexName", searcherManager.IndexName);
            result.Add("data", array);

            if (includeExplanation)
            {
                JArray explanations = new JArray();
                for (int i = skip; i < Math.Min(skip + take, topDocs.ScoreDocs.Length); i++)
                {
                    ScoreDoc scoreDoc = topDocs.ScoreDocs[i];
                    Explanation explanation = searcher.Explain(query, scoreDoc.Doc);
                    explanations.Add(explanation.ToString());
                }
                result.Add("explanations", explanations);
            }

            return result;
        }

 public List<Document> GetTopDocuments(TopDocs topDocs)
 {
     return topDocs == null ? null : (from ScoreDoc doc in topDocs.ScoreDocs select GetDocument(doc.doc)).ToList();
 }

                public override TopDocs SearchAfter(ScoreDoc after, Query query, int numHits)
                {
                    TopDocs[] shardHits = new TopDocs[NodeVersions.Length];
                    // results are merged in that order: score, shardIndex, doc. therefore we set
                    // after to after.Score and depending on the nodeID we set doc to either:
                    // - not collect any more documents with that score (only with worse score)
                    // - collect more documents with that score (and worse) following the last collected document
                    // - collect all documents with that score (and worse)
                    ScoreDoc shardAfter = new ScoreDoc(after.Doc, after.Score);
                    for (int nodeID = 0; nodeID < NodeVersions.Length; nodeID++)
                    {
                        if (nodeID < after.ShardIndex)
                        {
                            // all documents with after.Score were already collected, so collect
                            // only documents with worse scores.
                            NodeState.ShardIndexSearcher s = OuterInstance.OuterInstance.Nodes[nodeID].Acquire(NodeVersions);
                            try
                            {
                                // Setting after.Doc to reader.MaxDoc-1 is a way to tell
                                // TopScoreDocCollector that no more docs with that score should
                                // be collected. note that in practice the shard which sends the
                                // request to a remote shard won't have reader.MaxDoc at hand, so
                                // it will send some arbitrary value which will be fixed on the
                                // other end.
                                shardAfter.Doc = s.IndexReader.MaxDoc - 1;
                            }
                            finally
                            {
                                OuterInstance.OuterInstance.Nodes[nodeID].Release(s);
                            }
                        }
                        else if (nodeID == after.ShardIndex)
                        {
                            // collect all documents following the last collected doc with
                            // after.Score + documents with worse scores.
                            shardAfter.Doc = after.Doc;
                        }
                        else
                        {
                            // all documents with after.Score (and worse) should be collected
                            // because they didn't make it to top-N in the previous round.
                            shardAfter.Doc = -1;
                        }
                        if (nodeID == MyNodeID)
                        {
                            // My node; run using local shard searcher we
                            // already aquired:
                            shardHits[nodeID] = LocalSearchAfter(shardAfter, query, numHits);
                        }
                        else
                        {
                            shardHits[nodeID] = OuterInstance.OuterInstance.SearchNode(nodeID, NodeVersions, query, null, numHits, shardAfter);
                        }
                        //System.out.println("  node=" + nodeID + " totHits=" + shardHits[nodeID].TotalHits);
                    }

                    // Merge:
                    return TopDocs.Merge(null, numHits, shardHits);
                }

			private void RecordResultsAlreadySeenForDistinctQuery(IndexSearcher indexSearcher, TopDocs search, int start, int pageSize)
			{
				var min = Math.Min(start, search.TotalHits);

				// we are paging, we need to check that we don't have duplicates in the previous page
				// see here for details: http://groups.google.com/group/ravendb/browse_frm/thread/d71c44aa9e2a7c6e
				if (parent.IsMapReduce == false && fieldsToFetch.IsProjection == false && start - pageSize >= 0 && start < search.TotalHits)
				{
					for (int i = start - pageSize; i < min; i++)
					{
						var document = indexSearcher.Doc(search.ScoreDocs[i].Doc);
						documentsAlreadySeenInPreviousPage.Add(document.Get(Constants.DocumentIdFieldName));
					}
				}

				if (fieldsToFetch.IsDistinctQuery == false)
					return;

				// add results that were already there in previous pages
				for (int i = 0; i < min; i++)
				{
					Document document = indexSearcher.Doc(search.ScoreDocs[i].Doc);
					var indexQueryResult = parent.RetrieveDocument(document, fieldsToFetch, search.ScoreDocs[i]);
					alreadyReturned.Add(indexQueryResult.Projection);
				}
			}

 public static string TopdocsString(TopDocs docs, int start, int end)
 {
     StringBuilder sb = new StringBuilder();
     sb.Append("TopDocs totalHits=").Append(docs.TotalHits).Append(" top=").Append(docs.ScoreDocs.Length).Append('\n');
     if (end <= 0)
     {
         end = docs.ScoreDocs.Length;
     }
     else
     {
         end = Math.Min(end, docs.ScoreDocs.Length);
     }
     for (int i = start; i < end; i++)
     {
         sb.Append('\t');
         sb.Append(i);
         sb.Append(") doc=");
         sb.Append(docs.ScoreDocs[i].Doc);
         sb.Append("\tscore=");
         sb.Append(docs.ScoreDocs[i].Score);
         sb.Append('\n');
     }
     return sb.ToString();
 }

			private void RecordResultsAlreadySeenForDistinctQuery(IndexSearcher indexSearcher, TopDocs search, int start)
			{
				if (fieldsToFetch.IsDistinctQuery == false) 
					return;

				// add results that were already there in previous pages
				var min = Math.Min(start, search.TotalHits);
				for (int i = 0; i < min; i++)
				{
					Document document = indexSearcher.Doc(search.ScoreDocs[i].doc);
					var indexQueryResult = parent.RetrieveDocument(document, fieldsToFetch, search.ScoreDocs[i].score);
					alreadyReturned.Add(indexQueryResult.Projection);
				}
			}

        private static string MakeResults(IndexSearcher searcher, TopDocs topDocs, int skip, int take, bool includeExplanation, Query query, long elapsed, IDictionary<string, int> rankings, PackageSearcherManager manager)
        {
            //  note the use of a StringBuilder because we have the response data already formatted as JSON in the fields in the index

            StringBuilder strBldr = new StringBuilder();

            string timestamp;
            if (!searcher.IndexReader.CommitUserData.TryGetValue("commit-time-stamp", out timestamp))
            {
                timestamp = null;
            }

            strBldr.AppendFormat("{{\"totalHits\":{0},\"timeTakenInMs\":{1},\"index\":\"{2}\"", topDocs.TotalHits, elapsed, manager.IndexName);
            if (!String.IsNullOrEmpty(timestamp))
            {
                strBldr.AppendFormat(",\"indexTimestamp\":\"{0}\"", timestamp);
            }
            if (includeExplanation)
            {
                // JsonConvert.Serialize does escaping and quoting.
                strBldr.AppendFormat(",\"executedQuery\":{0}", Newtonsoft.Json.JsonConvert.SerializeObject(query.ToString()));
            }
            strBldr.Append(",\"data\":[");

            bool hasResult = false;

            for (int i = skip; i < topDocs.ScoreDocs.Length; i++)
            {
                ScoreDoc scoreDoc = topDocs.ScoreDocs[i];

                Document doc = searcher.Doc(scoreDoc.Doc);
                string data = doc.Get("Data");

                string id = doc.Get("Id");               
                NuGet.Versioning.NuGetVersion ngVersion = new Versioning.NuGetVersion(doc.Get("Version"));               
                     
                if (!String.IsNullOrEmpty(id) && ngVersion != null)
                {
                    Tuple<int,int> countRecord = manager.GetDownloadCount(id,ngVersion.ToNormalizedString());
                    if (countRecord != null)
                    {
                        // Patch the data in to the JSON
                        JObject parsed = JObject.Parse(data);
                        parsed["DownloadCount"] = countRecord.Item1;
                        parsed["PackageRegistration"]["DownloadCount"] = countRecord.Item2;                      
                        data = parsed.ToString(Formatting.None);
                    }
                }

                if (includeExplanation)
                {
                    data = AddExplanation(searcher, data, query, scoreDoc, rankings);
                }

                strBldr.Append(data);
                strBldr.Append(",");

                hasResult = true;
            }

            if (hasResult)
            {
                strBldr.Remove(strBldr.Length - 1, 1);
            }

            strBldr.Append("]}");

            string result = strBldr.ToString();

            return result;
        }

		public static System.String TopdocsString(TopDocs docs, int start, int end)
		{
			System.Text.StringBuilder sb = new System.Text.StringBuilder();
			sb.Append("TopDocs totalHits=").Append(docs.totalHits).Append(" top=").Append(docs.scoreDocs.Length).Append('\n');
			if (end <= 0)
				end = docs.scoreDocs.Length;
			else
				end = System.Math.Min(end, docs.scoreDocs.Length);
			for (int i = start; i < end; i++)
			{
				sb.Append('\t');
				sb.Append(i);
				sb.Append(") doc=");
				sb.Append(docs.scoreDocs[i].doc);
				sb.Append("\tscore=");
				sb.Append(docs.scoreDocs[i].score);
				sb.Append('\n');
			}
			return sb.ToString();
		}