C# Index.IndexWriter类代码示例

		public override void  SetUp()
		{
			base.SetUp();
			
			IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
			
			for (int i = 0; i < 5137; ++i)
			{
				Document doc = new Document();
				doc.Add(new Field(FIELD, "meaninglessnames", Field.Store.YES, Field.Index.NOT_ANALYZED));
				writer.AddDocument(doc);
			}
			{
				Document doc = new Document();
				doc.Add(new Field(FIELD, "tangfulin", Field.Store.YES, Field.Index.NOT_ANALYZED));
				writer.AddDocument(doc);
			}
			
			for (int i = 5138; i < 11377; ++i)
			{
				Document doc = new Document();
				doc.Add(new Field(FIELD, "meaninglessnames", Field.Store.YES, Field.Index.NOT_ANALYZED));
				writer.AddDocument(doc);
			}
			{
				Document doc = new Document();
				doc.Add(new Field(FIELD, "tangfulin", Field.Store.YES, Field.Index.NOT_ANALYZED));
				writer.AddDocument(doc);
			}
			
			writer.Close();
		}

        public virtual void TestAddSameDocTwice()
        {
            // LUCENE-5367: this was a problem with the previous code, making sure it
            // works with the new code.
            Directory indexDir = NewDirectory(), taxoDir = NewDirectory();
            IndexWriter indexWriter = new IndexWriter(indexDir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())));
            DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir);
            FacetsConfig facetsConfig = new FacetsConfig();
            Document doc = new Document();
            doc.Add(new FacetField("a", "b"));
            doc = facetsConfig.Build(taxoWriter, doc);
            // these two addDocument() used to fail
            indexWriter.AddDocument(doc);
            indexWriter.AddDocument(doc);
            IOUtils.Close(indexWriter, taxoWriter);

            DirectoryReader indexReader = DirectoryReader.Open(indexDir);
            DirectoryTaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);
            IndexSearcher searcher = NewSearcher(indexReader);
            FacetsCollector fc = new FacetsCollector();
            searcher.Search(new MatchAllDocsQuery(), fc);

            Facets facets = GetTaxonomyFacetCounts(taxoReader, facetsConfig, fc);
            FacetResult res = facets.GetTopChildren(10, "a");
            Assert.AreEqual(1, res.LabelValues.Length);
            Assert.AreEqual(2, res.LabelValues[0].value);
            IOUtils.Close(indexReader, taxoReader);

            IOUtils.Close(indexDir, taxoDir);
        }

		public virtual void  TestCustomLockFactory()
		{
			Directory dir = new RAMDirectory();
			MockLockFactory lf = new MockLockFactory(this);
			dir.SetLockFactory(lf);
			
			// Lock prefix should have been set:
			Assert.IsTrue(lf.lockPrefixSet, "lock prefix was not set by the RAMDirectory");
			
			IndexWriter writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
			
			// add 100 documents (so that commit lock is used)
			for (int i = 0; i < 100; i++)
			{
				AddDoc(writer);
			}
			
			// Both write lock and commit lock should have been created:
			Assert.AreEqual(1, lf.locksCreated.Count, "# of unique locks created (after instantiating IndexWriter)");
			Assert.IsTrue(lf.makeLockCount >= 1, "# calls to makeLock is 0 (after instantiating IndexWriter)");
			
			for (System.Collections.IEnumerator e = lf.locksCreated.Keys.GetEnumerator(); e.MoveNext(); )
			{
				System.String lockName = (System.String) e.Current;
				MockLockFactory.MockLock lock_Renamed = (MockLockFactory.MockLock) lf.locksCreated[lockName];
				Assert.IsTrue(lock_Renamed.lockAttempts > 0, "# calls to Lock.obtain is 0 (after instantiating IndexWriter)");
			}
			
			writer.Close();
		}

        public virtual void  TestMmapIndex()
        {
            Assert.Ignore("Need to port tests, but we don't really support MMapDirectories anyway");

            FSDirectory storeDirectory;
            storeDirectory = new MMapDirectory(new System.IO.DirectoryInfo(storePathname), null);
            
            // plan to add a set of useful stopwords, consider changing some of the
            // interior filters.
            StandardAnalyzer analyzer = new StandardAnalyzer(Util.Version.LUCENE_CURRENT, Support.Compatibility.SetFactory.CreateHashSet<string>());
            // TODO: something about lock timeouts and leftover locks.
            IndexWriter writer = new IndexWriter(storeDirectory, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);
            IndexSearcher searcher = new IndexSearcher(storeDirectory, true);
            
            for (int dx = 0; dx < 1000; dx++)
            {
                System.String f = RandomField();
                Document doc = new Document();
                doc.Add(new Field("data", f, Field.Store.YES, Field.Index.ANALYZED));
                writer.AddDocument(doc);
            }
            
            searcher.Close();
            writer.Close();
            RmDir(new System.IO.FileInfo(storePathname));
        }

        public virtual void TestCustomLockFactory()
        {
            Directory dir = new MockDirectoryWrapper(Random(), new RAMDirectory());
            MockLockFactory lf = new MockLockFactory(this);
            dir.LockFactory = lf;

            // Lock prefix should have been set:
            Assert.IsTrue(lf.LockPrefixSet, "lock prefix was not set by the RAMDirectory");

            IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())));

            // add 100 documents (so that commit lock is used)
            for (int i = 0; i < 100; i++)
            {
                AddDoc(writer);
            }

            // Both write lock and commit lock should have been created:
            Assert.AreEqual(1, lf.LocksCreated.Count, "# of unique locks created (after instantiating IndexWriter)");
            Assert.IsTrue(lf.MakeLockCount >= 1, "# calls to makeLock is 0 (after instantiating IndexWriter)");

            foreach (String lockName in lf.LocksCreated.Keys)
            {
                MockLockFactory.MockLock @lock = (MockLockFactory.MockLock)lf.LocksCreated[lockName];
                Assert.IsTrue(@lock.LockAttempts > 0, "# calls to Lock.obtain is 0 (after instantiating IndexWriter)");
            }

            writer.Dispose();
        }

		public virtual void  SetUp()
		{
			directory = new RAMDirectory();
			IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true);
			
			Document doc = new Document();
			doc.Add(Field.Text("Field", "one two three four five"));
			doc.Add(Field.Text("sorter", "b"));
			writer.AddDocument(doc);
			
			doc = new Document();
			doc.Add(Field.Text("Field", "one two three four"));
			doc.Add(Field.Text("sorter", "d"));
			writer.AddDocument(doc);
			
			doc = new Document();
			doc.Add(Field.Text("Field", "one two three y"));
			doc.Add(Field.Text("sorter", "a"));
			writer.AddDocument(doc);
			
			doc = new Document();
			doc.Add(Field.Text("Field", "one two x"));
			doc.Add(Field.Text("sorter", "c"));
			writer.AddDocument(doc);
			
			writer.Optimize();
			writer.Close();
			
			searcher = new IndexSearcher(directory);
			query = new TermQuery(new Term("Field", "three"));
			filter = new AnonymousClassFilter(this);
		}

        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")), Occur.SHOULD);

            // LUCENE-2617: make sure that a term not in the index still contributes to the score via coord factor
            float score = s.Search(q, 10).MaxScore;
            Query subQuery = new TermQuery(new Term("field", "not_in_index"));
            subQuery.Boost = 0;
            q.Add(subQuery, Occur.SHOULD);
            float score2 = s.Search(q, 10).MaxScore;
            Assert.AreEqual(score * .5, score2, 1e-6);

            // LUCENE-2617: make sure that a clause not in the index still contributes to the score via coord factor
            BooleanQuery qq = (BooleanQuery)q.Clone();
            PhraseQuery phrase = new PhraseQuery();
            phrase.Add(new Term("field", "not_in_index"));
            phrase.Add(new Term("field", "another_not_in_index"));
            phrase.Boost = 0;
            qq.Add(phrase, Occur.SHOULD);
            score2 = s.Search(qq, 10).MaxScore;
            Assert.AreEqual(score * (1.0 / 3), score2, 1e-6);

            // now test BooleanScorer2
            subQuery = new TermQuery(new Term("field", "b"));
            subQuery.Boost = 0;
            q.Add(subQuery, Occur.MUST);
            score2 = s.Search(q, 10).MaxScore;
            Assert.AreEqual(score * (2.0 / 3), score2, 1e-6);

            // PhraseQuery w/ no terms added returns a null scorer
            PhraseQuery pq = new PhraseQuery();
            q.Add(pq, 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")), Occur.SHOULD);
            q.Add(pq, 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  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);
			}
		}

        void Index()
        {
            Lucene.Net.Index.IndexWriter wr = new Lucene.Net.Index.IndexWriter(dir, new Lucene.Net.Analysis.WhitespaceAnalyzer(), Lucene.Net.Index.IndexWriter.MaxFieldLength.UNLIMITED);

            Lucene.Net.Documents.Document doc = null;
            Lucene.Net.Documents.Field f = null;

            doc = new Lucene.Net.Documents.Document();
            f = new Lucene.Net.Documents.Field("field", "a b c d", Lucene.Net.Documents.Field.Store.NO, Lucene.Net.Documents.Field.Index.ANALYZED);
            doc.Add(f);
            wr.AddDocument(doc);

            doc = new Lucene.Net.Documents.Document();
            f = new Lucene.Net.Documents.Field("field", "a b a d", Lucene.Net.Documents.Field.Store.NO, Lucene.Net.Documents.Field.Index.ANALYZED);
            doc.Add(f);
            wr.AddDocument(doc);

            doc = new Lucene.Net.Documents.Document();
            f = new Lucene.Net.Documents.Field("field", "a b e f", Lucene.Net.Documents.Field.Store.NO, Lucene.Net.Documents.Field.Index.ANALYZED);
            doc.Add(f);
            wr.AddDocument(doc);

            doc = new Lucene.Net.Documents.Document();
            f = new Lucene.Net.Documents.Field("field", "x y z", Lucene.Net.Documents.Field.Store.NO, Lucene.Net.Documents.Field.Index.ANALYZED);
            doc.Add(f);
            wr.AddDocument(doc);

            wr.Dispose();
        }

		public virtual void  TestDemo_Renamed_Method()
		{
			
			Analyzer analyzer = new StandardAnalyzer();
			
			// Store the index in memory:
			Directory directory = new RAMDirectory();
			// To store an index on disk, use this instead (note that the 
			// parameter true will overwrite the index in that directory
			// if one exists):
			//Directory directory = FSDirectory.getDirectory("/tmp/testindex", true);
			IndexWriter iwriter = new IndexWriter(directory, analyzer, true);
			iwriter.SetMaxFieldLength(25000);
			Document doc = new Document();
			System.String text = "This is the text to be indexed.";
			doc.Add(new Field("fieldname", text, Field.Store.YES, Field.Index.TOKENIZED));
			iwriter.AddDocument(doc);
			iwriter.Close();
			
			// Now search the index:
			IndexSearcher isearcher = new IndexSearcher(directory);
			// Parse a simple query that searches for "text":
			Lucene.Net.QueryParsers.QueryParser parser = new Lucene.Net.QueryParsers.QueryParser("fieldname", analyzer);
			Query query = parser.Parse("text");
			Hits hits = isearcher.Search(query);
			Assert.AreEqual(1, hits.Length());
			// Iterate through the results:
			for (int i = 0; i < hits.Length(); i++)
			{
				Document hitDoc = hits.Doc(i);
				Assert.AreEqual("This is the text to be indexed.", hitDoc.Get("fieldname"));
			}
			isearcher.Close();
			directory.Close();
		}

		public virtual void  TestRAMDirectoryNoLocking()
		{
			Directory dir = new RAMDirectory();
			dir.SetLockFactory(NoLockFactory.GetNoLockFactory());
			
			Assert.IsTrue(typeof(NoLockFactory).IsInstanceOfType(dir.GetLockFactory()), "RAMDirectory.setLockFactory did not take");
			
			IndexWriter writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true);
			
			// Create a 2nd IndexWriter.  This is normally not allowed but it should run through since we're not
			// using any locks:
			IndexWriter writer2 = null;
			try
			{
				writer2 = new IndexWriter(dir, new WhitespaceAnalyzer(), false);
			}
			catch (System.Exception e)
			{
				System.Console.Out.WriteLine(e.StackTrace);
				Assert.Fail("Should not have hit an IOException with no locking");
			}
			
			writer.Close();
			if (writer2 != null)
			{
				writer2.Close();
			}
		}

		private void  Build()
		{
			try
			{
				
				/* build an index */
				IndexWriter writer = new IndexWriter(index, new SimpleAnalyzer(), T);
				
				for (int d = minId; d <= maxId; d++)
				{
					Lucene.Net.Documents.Document doc = new Lucene.Net.Documents.Document();
					doc.Add(new Field("id", Pad(d), Field.Store.YES, Field.Index.UN_TOKENIZED));
					int r = rand.Next();
					if (maxR < r)
					{
						maxR = r;
					}
					if (r < minR)
					{
						minR = r;
					}
					doc.Add(new Field("rand", Pad(r), Field.Store.YES, Field.Index.UN_TOKENIZED));
					doc.Add(new Field("body", "body", Field.Store.YES, Field.Index.UN_TOKENIZED));
					writer.AddDocument(doc);
				}
				
				writer.Optimize();
				writer.Close();
			}
			catch (System.Exception e)
			{
				throw new System.Exception("can't build index", e);
			}
		}

		public virtual void  CreateRandomTerms(int nDocs, int nTerms, double power, Directory dir)
		{
			int[] freq = new int[nTerms];
			for (int i = 0; i < nTerms; i++)
			{
				int f = (nTerms + 1) - i; // make first terms less frequent
				freq[i] = (int) System.Math.Ceiling(System.Math.Pow(f, power));
				terms[i] = new Term("f", System.Convert.ToString((char) ('A' + i)));
			}
			
			IndexWriter iw = new IndexWriter(dir, new WhitespaceAnalyzer(), true);
			for (int i = 0; i < nDocs; i++)
			{
				Document d = new Document();
				for (int j = 0; j < nTerms; j++)
				{
					if (r.Next(freq[j]) == 0)
					{
						d.Add(new Field("f", terms[j].Text(), Field.Store.NO, Field.Index.UN_TOKENIZED));
						//System.out.println(d);
					}
				}
				iw.AddDocument(d);
			}
			iw.Optimize();
			iw.Close();
		}

		public override void  SetUp()
		{
			base.SetUp();
			RAMDirectory directory = new RAMDirectory();
			IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
			long theLong = System.Int64.MaxValue;
			double theDouble = System.Double.MaxValue;
			sbyte theByte = (sbyte) System.SByte.MaxValue;
			short theShort = System.Int16.MaxValue;
			int theInt = System.Int32.MaxValue;
			float theFloat = System.Single.MaxValue;
			for (int i = 0; i < NUM_DOCS; i++)
			{
				Document doc = new Document();
				doc.Add(new Field("theLong", System.Convert.ToString(theLong--), Field.Store.NO, Field.Index.NOT_ANALYZED));
				doc.Add(new Field("theDouble", (theDouble--).ToString("E16"), Field.Store.NO, Field.Index.NOT_ANALYZED));
				doc.Add(new Field("theByte", System.Convert.ToString((sbyte) theByte--), Field.Store.NO, Field.Index.NOT_ANALYZED));
				doc.Add(new Field("theShort", System.Convert.ToString(theShort--), Field.Store.NO, Field.Index.NOT_ANALYZED));
				doc.Add(new Field("theInt", System.Convert.ToString(theInt--), Field.Store.NO, Field.Index.NOT_ANALYZED));
				doc.Add(new Field("theFloat", (theFloat--).ToString("E8"), Field.Store.NO, Field.Index.NOT_ANALYZED));
				writer.AddDocument(doc);
			}
			writer.Close();
			reader = IndexReader.Open(directory);
		}

		public virtual void  SetUp()
		{
			// Create an index writer.
			directory = new RAMDirectory();
			IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true);

			// oldest doc:
			// Add the first document.  text = "Document 1"  dateTime = Oct 10 03:25:22 EDT 2007
			writer.AddDocument(CreateDocument("Document 1", 633275835220000000L));
			// Add the second document.  text = "Document 2"  dateTime = Oct 10 03:25:26 EDT 2007 
			writer.AddDocument(CreateDocument("Document 2", 633275835260000000L));
			// Add the third document.  text = "Document 3"  dateTime = Oct 11 07:12:13 EDT 2007 
			writer.AddDocument(CreateDocument("Document 3", 633276835330000000L));
			// Add the fourth document.  text = "Document 4"  dateTime = Oct 11 08:02:09 EDT 2007
			writer.AddDocument(CreateDocument("Document 4", 633276865290000000L));
			// latest doc:
			// Add the fifth document.  text = "Document 5"  dateTime = Oct 12 13:25:43 EDT 2007
			writer.AddDocument(CreateDocument("Document 5", 633277923430000000L));

			//// oldest doc:
			//// Add the first document.  text = "Document 1"  dateTime = Oct 10 03:25:22 EDT 2007
			//writer.AddDocument(CreateDocument("Document 1", 1192001122000L));
			//// Add the second document.  text = "Document 2"  dateTime = Oct 10 03:25:26 EDT 2007 
			//writer.AddDocument(CreateDocument("Document 2", 1192001126000L));
			//// Add the third document.  text = "Document 3"  dateTime = Oct 11 07:12:13 EDT 2007 
			//writer.AddDocument(CreateDocument("Document 3", 1192101133000L));
			//// Add the fourth document.  text = "Document 4"  dateTime = Oct 11 08:02:09 EDT 2007
			//writer.AddDocument(CreateDocument("Document 4", 1192104129000L));
			//// latest doc:
			//// Add the fifth document.  text = "Document 5"  dateTime = Oct 12 13:25:43 EDT 2007
			//writer.AddDocument(CreateDocument("Document 5", 1192209943000L));
			
			writer.Optimize();
			writer.Close();
		}