C# Search.BooleanQuery类代码示例

 public static Query BuildQuery(string query)
 {
     var matchCollection = untokenizedQuery.Matches(query);
     if (matchCollection.Count == 0)
         return new QueryParser(Version.LUCENE_CURRENT, "", new StandardAnalyzer(Version.LUCENE_CURRENT)).Parse(query);
     var sb = new StringBuilder(query);
     var booleanQuery = new BooleanQuery();
     foreach (Match match in matchCollection)
     {
         BooleanClause.Occur occur;
         switch (match.Groups[1].Value)
         {
             case "+":
                 occur=BooleanClause.Occur.MUST;
                 break;
             case "-":
                 occur=BooleanClause.Occur.MUST_NOT;
                 break;
             default:
                 occur=BooleanClause.Occur.SHOULD;
                 break;
         }
         booleanQuery.Add(new TermQuery(new Term(match.Groups[2].Value, match.Groups[3].Value)), occur);
         sb.Replace(match.Value, "");
     }
     var remaining = sb.ToString().Trim();
     if(remaining.Length > 0)
     {
         booleanQuery.Add(new QueryParser(Version.LUCENE_CURRENT, "", new StandardAnalyzer(Version.LUCENE_CURRENT)).Parse(remaining), BooleanClause.Occur.SHOULD);
     }
     return booleanQuery;
 }

		public virtual void  TestNullOrSubScorer()
		{
			Directory dir = new MockRAMDirectory();
			IndexWriter w = new IndexWriter(dir, new WhitespaceAnalyzer(), IndexWriter.MaxFieldLength.UNLIMITED);
			Document doc = new Document();
			doc.Add(new Field("field", "a b c d", Field.Store.NO, Field.Index.ANALYZED));
			w.AddDocument(doc);
			IndexReader r = w.GetReader();
			IndexSearcher s = new IndexSearcher(r);
			BooleanQuery q = new BooleanQuery();
			q.Add(new TermQuery(new Term("field", "a")), BooleanClause.Occur.SHOULD);
			
			// PhraseQuery w/ no terms added returns a null scorer
			PhraseQuery pq = new PhraseQuery();
			q.Add(pq, BooleanClause.Occur.SHOULD);
			Assert.AreEqual(1, s.Search(q, 10).TotalHits);
			
			// A required clause which returns null scorer should return null scorer to
			// IndexSearcher.
			q = new BooleanQuery();
			pq = new PhraseQuery();
			q.Add(new TermQuery(new Term("field", "a")), BooleanClause.Occur.SHOULD);
			q.Add(pq, BooleanClause.Occur.MUST);
			Assert.AreEqual(0, s.Search(q, 10).TotalHits);
			
			DisjunctionMaxQuery dmq = new DisjunctionMaxQuery(1.0f);
			dmq.Add(new TermQuery(new Term("field", "a")));
			dmq.Add(pq);
			Assert.AreEqual(1, s.Search(dmq, 10).TotalHits);
			
			r.Close();
			w.Close();
			dir.Close();
		}

		public virtual void  TestQuery()
		{
			RAMDirectory dir = new RAMDirectory();
			IndexWriter iw = new IndexWriter(dir, new StandardAnalyzer(), true);
			AddDoc("one", iw);
			AddDoc("two", iw);
			AddDoc("three four", iw);
			iw.Close();
			
			IndexSearcher is_Renamed = new IndexSearcher(dir);
			Hits hits = is_Renamed.Search(new MatchAllDocsQuery());
			Assert.AreEqual(3, hits.Length());
			
			// some artificial queries to trigger the use of skipTo():
			
			BooleanQuery bq = new BooleanQuery();
			bq.Add(new MatchAllDocsQuery(), BooleanClause.Occur.MUST);
			bq.Add(new MatchAllDocsQuery(), BooleanClause.Occur.MUST);
			hits = is_Renamed.Search(bq);
			Assert.AreEqual(3, hits.Length());
			
			bq = new BooleanQuery();
			bq.Add(new MatchAllDocsQuery(), BooleanClause.Occur.MUST);
			bq.Add(new TermQuery(new Term("key", "three")), BooleanClause.Occur.MUST);
			hits = is_Renamed.Search(bq);
			Assert.AreEqual(1, hits.Length());
			
			// delete a document:
			is_Renamed.GetIndexReader().DeleteDocument(0);
			hits = is_Renamed.Search(new MatchAllDocsQuery());
			Assert.AreEqual(2, hits.Length());
			
			is_Renamed.Close();
		}

        public Query GetQuery()
        {
            if (String.IsNullOrWhiteSpace(Term) && String.IsNullOrWhiteSpace(Type) && !CreatedOnTo.HasValue && !CreatedOnFrom.HasValue && Parent == null)
                return new MatchAllDocsQuery();

            var booleanQuery = new BooleanQuery();
            if (!String.IsNullOrWhiteSpace(Term))
            {
                var indexDefinition = IndexingHelper.Get<AdminWebpageIndexDefinition>();
                var analyser = indexDefinition.GetAnalyser();
                var parser = new MultiFieldQueryParser(Lucene.Net.Util.Version.LUCENE_30, indexDefinition.SearchableFieldNames, analyser);
                Query query = Term.SafeGetSearchQuery(parser, analyser);

                booleanQuery.Add(query, Occur.MUST);
            }
            if (CreatedOnFrom.HasValue || CreatedOnTo.HasValue)
                booleanQuery.Add(GetDateQuery(), Occur.MUST);
            if (!string.IsNullOrEmpty(Type))
                booleanQuery.Add(new TermQuery(new Term(FieldDefinition.GetFieldName<TypeFieldDefinition>(), Type)),
                                 Occur.MUST);
            if (Parent != null)
                booleanQuery.Add(
                    new TermQuery(new Term(FieldDefinition.GetFieldName<ParentIdFieldDefinition>(), Parent.Id.ToString())), Occur.MUST);

            return booleanQuery;
        }

 public virtual void TestBQ14()
 {
     BooleanQuery q = new BooleanQuery(true);
     q.Add(new TermQuery(new Term(FIELD, "QQQQQ")), BooleanClause.Occur.SHOULD);
     q.Add(new TermQuery(new Term(FIELD, "w1")), BooleanClause.Occur.SHOULD);
     Qtest(q, new int[] { 0, 1, 2, 3 });
 }

        public IEnumerable<BeerReview> Get(string reviewText = null, int limit = 10, double minAroma = 0, double minAppearance = 0, double minOverall = 0, double minTaste = 0, double minPalate = 0)
        {
            var query = new BooleanQuery();
            Query reviewTextQuery = new TermQuery(new Term("reviewText", reviewText));
            Query reviewAppearanceQuery = NumericRangeQuery.NewDoubleRange("reviewAppearance", minAppearance, null, minInclusive: true, maxInclusive: true);
            Query reviewAromaQuery = NumericRangeQuery.NewDoubleRange("reviewAroma", minAroma, null, minInclusive: true, maxInclusive: true);
            Query reviewPalateQuery = NumericRangeQuery.NewDoubleRange("reviewPalate", minPalate, null, minInclusive: true, maxInclusive: true);
            Query reviewTasteQuery = NumericRangeQuery.NewDoubleRange("reviewTaste", minTaste, null, minInclusive: true, maxInclusive: true);
            Query reviewOverallQuery = NumericRangeQuery.NewDoubleRange("reviewOverall", minOverall, null, minInclusive: true, maxInclusive: true);

            if (reviewText != null) { query.Add(reviewTextQuery, Occur.MUST); }
            query.Add(reviewAppearanceQuery, Occur.MUST);
            query.Add(reviewAromaQuery, Occur.MUST);
            query.Add(reviewOverallQuery, Occur.MUST);
            query.Add(reviewPalateQuery, Occur.MUST);
            query.Add(reviewTasteQuery, Occur.MUST);

            var hits = indexSearcher.Search(query, limit);

            var beers = new List<BeerReview>();

            for (int i = 0; i < hits.ScoreDocs.Count(); i++)
            {
                beers.Add(BeerReviewFromDoc(hits.ScoreDocs[i]));
            }

            return beers;
        }

        public virtual void TestAsterisk()
        {
            Directory indexStore = GetIndexStore("body", new string[] { "metal", "metals" });
            IndexReader reader = DirectoryReader.Open(indexStore);
            IndexSearcher searcher = NewSearcher(reader);
            Query query1 = new TermQuery(new Term("body", "metal"));
            Query query2 = new WildcardQuery(new Term("body", "metal*"));
            Query query3 = new WildcardQuery(new Term("body", "m*tal"));
            Query query4 = new WildcardQuery(new Term("body", "m*tal*"));
            Query query5 = new WildcardQuery(new Term("body", "m*tals"));

            BooleanQuery query6 = new BooleanQuery();
            query6.Add(query5, BooleanClause.Occur.SHOULD);

            BooleanQuery query7 = new BooleanQuery();
            query7.Add(query3, BooleanClause.Occur.SHOULD);
            query7.Add(query5, BooleanClause.Occur.SHOULD);

            // Queries do not automatically lower-case search terms:
            Query query8 = new WildcardQuery(new Term("body", "M*tal*"));

            AssertMatches(searcher, query1, 1);
            AssertMatches(searcher, query2, 2);
            AssertMatches(searcher, query3, 1);
            AssertMatches(searcher, query4, 2);
            AssertMatches(searcher, query5, 1);
            AssertMatches(searcher, query6, 1);
            AssertMatches(searcher, query7, 2);
            AssertMatches(searcher, query8, 0);
            AssertMatches(searcher, new WildcardQuery(new Term("body", "*tall")), 0);
            AssertMatches(searcher, new WildcardQuery(new Term("body", "*tal")), 1);
            AssertMatches(searcher, new WildcardQuery(new Term("body", "*tal*")), 2);
            reader.Dispose();
            indexStore.Dispose();
        }

        internal static void AddDateRangeQuery(BooleanQuery query, DateRangeSearchParam.DateRangeField dateRangeField, BooleanClause.Occur occurance)
        {
            var startDateTime = dateRangeField.StartDate;
            if (dateRangeField.InclusiveStart)
            {
                if (startDateTime != DateTime.MinValue)
                {
                    startDateTime.ChangeTime(0, 0, 0, 0);
                }
            }

            var endDateTime = dateRangeField.EndDate;
            if (dateRangeField.InclusiveStart)
            {
                if (endDateTime != DateTime.MaxValue)
                {
                    endDateTime = endDateTime.ChangeTime(23, 59, 59, 59);
                }
            }

            BooleanQuery.SetMaxClauseCount(int.MaxValue);

            if (!(dateRangeField.StartDate == DateTime.MinValue && dateRangeField.EndDate == DateTime.MaxValue))
            {
                query.Add(new RangeQuery(new Term(SearchFieldIDs.CreatedDate, startDateTime.ToString("yyyyMMdd")), new Term(SearchFieldIDs.CreatedDate, endDateTime.ToString("yyyyMMdd")), true), occurance);
            }
        }

        public static Lucene.Net.Search.Query FilterQueryByClasses(ISet<System.Type> classesAndSubclasses, Lucene.Net.Search.Query luceneQuery)
        {
            // A query filter is more practical than a manual class filtering post query (esp on scrollable resultsets)
            // it also probably minimise the memory footprint
            if (classesAndSubclasses == null)
            {
                return luceneQuery;
            }

            BooleanQuery classFilter = new BooleanQuery();

            // annihilate the scoring impact of DocumentBuilder.CLASS_FIELDNAME
            classFilter.SetBoost(0);
            foreach (System.Type clazz in classesAndSubclasses)
            {
                Term t = new Term(DocumentBuilder.CLASS_FIELDNAME, TypeHelper.LuceneTypeName(clazz));
                TermQuery termQuery = new TermQuery(t);
                classFilter.Add(termQuery, BooleanClause.Occur.SHOULD);
            }

            BooleanQuery filteredQuery = new BooleanQuery();
            filteredQuery.Add(luceneQuery, BooleanClause.Occur.MUST);
            filteredQuery.Add(classFilter, BooleanClause.Occur.MUST);
            return filteredQuery;
        }

        public virtual Query Build(IQueryNode queryNode)
        {
            StandardBooleanQueryNode booleanNode = (StandardBooleanQueryNode)queryNode;

            BooleanQuery bQuery = new BooleanQuery(booleanNode.DisableCoord);
            IList<IQueryNode> children = booleanNode.GetChildren();

            if (children != null)
            {
                foreach (IQueryNode child in children)
                {
                    object obj = child.GetTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);

                    if (obj != null)
                    {
                        Query query = (Query)obj;

                        try
                        {
                            bQuery.Add(query, GetModifierValue(child));
                        }
                        catch (BooleanQuery.TooManyClauses ex)
                        {
                            throw new QueryNodeException(new MessageImpl(
                                QueryParserMessages.TOO_MANY_BOOLEAN_CLAUSES, BooleanQuery
                                    .MaxClauseCount, queryNode
                                    .ToQueryString(new EscapeQuerySyntaxImpl())), ex);
                        }
                    }
                }
            }

            return bQuery;
        }

 /// <summary>
 /// Decorates the specified query adding context information.
 /// </summary>
 /// <param name="query">The source query.</param>
 /// <returns>The decorated query.</returns>
 public Lucene.Net.Search.Query Decorate(Lucene.Net.Search.Query query)
 {
     BooleanQuery result = new BooleanQuery(true);
       result.Add(query, Occur.MUST);
       this.AddDecorations(result);
       return result;
 }

        /// <summary>
        ///     Adds the query.
        /// </summary>
        /// <param name="fieldName">Name of the field.</param>
        /// <param name="query">The query.</param>
        /// <param name="filter">The filter.</param>
        protected void AddQuery(string fieldName, BooleanQuery query, StringCollection filter)
        {
            fieldName = fieldName.ToLower();
            if (filter.Count > 0)
            {
                if (filter.Count != 1)
                {
                    var booleanQuery = new BooleanQuery();
                    var containsFilter = false;
                    foreach (var index in filter)
                    {
                        if (String.IsNullOrEmpty(index))
                        {
                            continue;
                        }

                        var nodeQuery = new WildcardQuery(new Term(fieldName, index));
                        booleanQuery.Add(nodeQuery, Occur.SHOULD);
                        containsFilter = true;
                    }
                    if (containsFilter)
                    {
                        query.Add(booleanQuery, Occur.MUST);
                    }
                }
                else
                {
                    if (!String.IsNullOrEmpty(filter[0]))
                    {
                        this.AddQuery(fieldName, query, filter[0].ToLower());
                    }
                }
            }
        }

        public virtual void TestMethod()
        {
            Directory directory = NewDirectory();

            string[] values = new string[] { "1", "2", "3", "4" };

            RandomIndexWriter writer = new RandomIndexWriter(Random(), directory, Similarity, TimeZone);
            for (int i = 0; i < values.Length; i++)
            {
                Document doc = new Document();
                doc.Add(NewStringField(FIELD, values[i], Field.Store.YES));
                writer.AddDocument(doc);
            }
            IndexReader ir = writer.Reader;
            writer.Dispose();

            BooleanQuery booleanQuery1 = new BooleanQuery();
            booleanQuery1.Add(new TermQuery(new Term(FIELD, "1")), BooleanClause.Occur.SHOULD);
            booleanQuery1.Add(new TermQuery(new Term(FIELD, "2")), BooleanClause.Occur.SHOULD);

            BooleanQuery query = new BooleanQuery();
            query.Add(booleanQuery1, BooleanClause.Occur.MUST);
            query.Add(new TermQuery(new Term(FIELD, "9")), BooleanClause.Occur.MUST_NOT);

            IndexSearcher indexSearcher = NewSearcher(ir);
            ScoreDoc[] hits = indexSearcher.Search(query, null, 1000).ScoreDocs;
            Assert.AreEqual(2, hits.Length, "Number of matched documents");
            ir.Dispose();
            directory.Dispose();
        }

		public virtual void  TestMethod()
		{
			RAMDirectory directory = new RAMDirectory();
			
			System.String[] values = new System.String[]{"1", "2", "3", "4"};
			
			try
			{
				IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true);
				for (int i = 0; i < values.Length; i++)
				{
					Lucene.Net.Documents.Document doc = new Lucene.Net.Documents.Document();
					doc.Add(new Field(FIELD, values[i], Field.Store.YES, Field.Index.UN_TOKENIZED));
					writer.AddDocument(doc);
				}
				writer.Close();
				
				BooleanQuery booleanQuery1 = new BooleanQuery();
				booleanQuery1.Add(new TermQuery(new Term(FIELD, "1")), BooleanClause.Occur.SHOULD);
				booleanQuery1.Add(new TermQuery(new Term(FIELD, "2")), BooleanClause.Occur.SHOULD);
				
				BooleanQuery query = new BooleanQuery();
				query.Add(booleanQuery1, BooleanClause.Occur.MUST);
				query.Add(new TermQuery(new Term(FIELD, "9")), BooleanClause.Occur.MUST_NOT);
				
				IndexSearcher indexSearcher = new IndexSearcher(directory);
				Hits hits = indexSearcher.Search(query);
				Assert.AreEqual(2, hits.Length(), "Number of matched documents");
			}
			catch (System.IO.IOException e)
			{
				Assert.Fail(e.Message);
			}
		}

        private static Query ParseQuery(string searchTerm)
        {
            var fields = new Dictionary<string, float> { { "Id", 1.2f }, { "Title", 1.0f }, { "Tags", 1.0f}, { "Description", 0.8f }, { "Author", 0.6f } };
            var analyzer = new StandardAnalyzer(LuceneCommon.LuceneVersion);
            searchTerm = QueryParser.Escape(searchTerm).ToLowerInvariant();

            var queryParser = new MultiFieldQueryParser(LuceneCommon.LuceneVersion, fields.Keys.ToArray(), analyzer, fields);

            var conjuctionQuery = new BooleanQuery();
            conjuctionQuery.SetBoost(1.5f);
            var disjunctionQuery = new BooleanQuery();
            var wildCardQuery = new BooleanQuery();
            wildCardQuery.SetBoost(0.7f);
            var exactIdQuery = new TermQuery(new Term("Id-Exact", searchTerm));
            exactIdQuery.SetBoost(2.5f);

            foreach(var term in searchTerm.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries))
            {
                conjuctionQuery.Add(queryParser.Parse(term), BooleanClause.Occur.MUST);
                disjunctionQuery.Add(queryParser.Parse(term), BooleanClause.Occur.SHOULD);

                foreach (var field in fields)
                {
                    var wildCardTermQuery = new WildcardQuery(new Term(field.Key, term + "*"));
                    wildCardTermQuery.SetBoost(0.7f * field.Value);
                    wildCardQuery.Add(wildCardTermQuery, BooleanClause.Occur.SHOULD);
                }
            }

            return conjuctionQuery.Combine(new Query[] { exactIdQuery, conjuctionQuery, disjunctionQuery, wildCardQuery });
        }