test/core/Index/TestDocumentWriter.cs - lucenenet - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 using System;
 using Lucene.Net.Analysis.Tokenattributes;
 using Lucene.Net.Documents;
 using Lucene.Net.Util;
 using NUnit.Framework;

 using Analyzer = Lucene.Net.Analysis.Analyzer;
 using SimpleAnalyzer = Lucene.Net.Analysis.SimpleAnalyzer;
 using TokenFilter = Lucene.Net.Analysis.TokenFilter;
 using TokenStream = Lucene.Net.Analysis.TokenStream;
 using WhitespaceAnalyzer = Lucene.Net.Analysis.WhitespaceAnalyzer;
 using WhitespaceTokenizer = Lucene.Net.Analysis.WhitespaceTokenizer;
 using StandardAnalyzer = Lucene.Net.Analysis.Standard.StandardAnalyzer;
 using Document = Lucene.Net.Documents.Document;
 using Field = Lucene.Net.Documents.Field;
 using Index = Lucene.Net.Documents.Field.Index;
 using Store = Lucene.Net.Documents.Field.Store;
 using TermVector = Lucene.Net.Documents.Field.TermVector;
 using RAMDirectory = Lucene.Net.Store.RAMDirectory;
 using AttributeSource = Lucene.Net.Util.AttributeSource;
 using BaseTokenStreamTestCase = Lucene.Net.Test.Analysis.BaseTokenStreamTestCase;
 using _TestUtil = Lucene.Net.Util._TestUtil;

 namespace Lucene.Net.Index
 {

 	[TestFixture]
 	public class TestDocumentWriter : LuceneTestCase
 	{
 		private class AnonymousClassAnalyzer:Analyzer
 		{
 			public AnonymousClassAnalyzer(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
 			{
 				return new WhitespaceTokenizer(reader);
 			}

 			public override int GetPositionIncrementGap(System.String fieldName)
 			{
 				return 500;
 			}
 		}
 		private class AnonymousClassAnalyzer1:Analyzer
 		{
 			public AnonymousClassAnalyzer1(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}
 			private class AnonymousClassTokenFilter:TokenFilter
 			{
 				private void  InitBlock(AnonymousClassAnalyzer1 enclosingInstance)
 				{
 					this.enclosingInstance = enclosingInstance;
                     termAtt = AddAttribute<ITermAttribute>();
                     payloadAtt = AddAttribute<IPayloadAttribute>();
                     posIncrAtt = AddAttribute<IPositionIncrementAttribute>();
 				}
 				private AnonymousClassAnalyzer1 enclosingInstance;
 				public AnonymousClassAnalyzer1 Enclosing_Instance
 				{
 					get
 					{
 						return enclosingInstance;
 					}

 				}
 				internal AnonymousClassTokenFilter(AnonymousClassAnalyzer1 enclosingInstance, Lucene.Net.Analysis.TokenStream Param1):base(Param1)
 				{
 					InitBlock(enclosingInstance);
 				}
 				internal bool first = true;
 				internal AttributeSource.State state;

 				public override bool IncrementToken()
 				{
 					if (state != null)
 					{
 						RestoreState(state);
 						payloadAtt.Payload = null;
 						posIncrAtt.PositionIncrement = 0;
 						termAtt.SetTermBuffer(new char[]{'b'}, 0, 1);
 						state = null;
 						return true;
 					}

 					bool hasNext = input.IncrementToken();
 					if (!hasNext)
 						return false;
 					if (System.Char.IsDigit(termAtt.TermBuffer()[0]))
 					{
 						posIncrAtt.PositionIncrement = termAtt.TermBuffer()[0] - '0';
 					}
 					if (first)
 					{
 						// set payload on first position only
 						payloadAtt.Payload = new Payload(new byte[]{100});
 						first = false;
 					}

 					// index a "synonym" for every token
 					state = CaptureState();
 					return true;
 				}

 				internal ITermAttribute termAtt;
 				internal IPayloadAttribute payloadAtt;
 				internal IPositionIncrementAttribute posIncrAtt;
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
 			{
 				return new AnonymousClassTokenFilter(this, new WhitespaceTokenizer(reader));
 			}
 		}
 		private class AnonymousClassTokenStream:TokenStream
 		{
 			public AnonymousClassTokenStream(TestDocumentWriter enclosingInstance)
 			{
 				InitBlock(enclosingInstance);
 			}
 			private void  InitBlock(TestDocumentWriter enclosingInstance)
 			{
 				this.enclosingInstance = enclosingInstance;
                 termAtt = AddAttribute<ITermAttribute>();
 			}
 			private TestDocumentWriter enclosingInstance;
 			public TestDocumentWriter Enclosing_Instance
 			{
 				get
 				{
 					return enclosingInstance;
 				}

 			}
 			private System.String[] tokens = new System.String[]{"term1", "term2", "term3", "term2"};
 			private int index = 0;

 			private ITermAttribute termAtt;

 			public override bool IncrementToken()
 			{
 				if (index == tokens.Length)
 				{
 					return false;
 				}
 				else
 				{
                     ClearAttributes();
 					termAtt.SetTermBuffer(tokens[index++]);
 					return true;
 				}
 			}

 		    protected override void Dispose(bool disposing)
 		    {
 		        // Do Nothing
 		    }
 		}
 		private RAMDirectory dir;

 		public TestDocumentWriter(System.String s):base(s)
 		{
 		}

         public TestDocumentWriter() : base("")
         {
         }

 		[SetUp]
 		public override void  SetUp()
 		{
 			base.SetUp();
 			dir = new RAMDirectory();
 		}

 		[Test]
 		public virtual void  Test()
 		{
 			Assert.IsTrue(dir != null);
 		}

 		[Test]
 		public virtual void  TestAddDocument()
 		{
 			Document testDoc = new Document();
 			DocHelper.SetupDoc(testDoc);
 			Analyzer analyzer = new WhitespaceAnalyzer();
 			IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);
 			writer.AddDocument(testDoc);
 			writer.Commit();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
 			//After adding the document, we should be able to read it back in
             SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);
 			Assert.IsTrue(reader != null);
 			Document doc = reader.Document(0);
 			Assert.IsTrue(doc != null);

 			//System.out.println("Document: " + doc);
 			IFieldable[] fields = doc.GetFields("textField2");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_2_TEXT));
 			Assert.IsTrue(fields[0].IsTermVectorStored);

 			fields = doc.GetFields("textField1");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_1_TEXT));
 			Assert.IsFalse(fields[0].IsTermVectorStored);

 			fields = doc.GetFields("keyField");
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.KEYWORD_TEXT));

 			fields = doc.GetFields(DocHelper.NO_NORMS_KEY);
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.NO_NORMS_TEXT));

 			fields = doc.GetFields(DocHelper.TEXT_FIELD_3_KEY);
 			Assert.IsTrue(fields != null && fields.Length == 1);
 			Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_3_TEXT));

 			// test that the norms are not present in the segment if
 			// omitNorms is true
 			for (int i = 0; i < reader.core_ForNUnit.fieldInfos_ForNUnit.Size(); i++)
 			{
 				FieldInfo fi = reader.core_ForNUnit.fieldInfos_ForNUnit.FieldInfo(i);
 				if (fi.isIndexed_ForNUnit)
 				{
 					Assert.IsTrue(fi.omitNorms_ForNUnit == !reader.HasNorms(fi.name_ForNUnit));
 				}
 			}
 		}

 		[Test]
 		public virtual void  TestPositionIncrementGap()
 		{
 			Analyzer analyzer = new AnonymousClassAnalyzer(this);

 			IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

 			Document doc = new Document();
 			doc.Add(new Field("repeated", "repeated one", Field.Store.YES, Field.Index.ANALYZED));
 			doc.Add(new Field("repeated", "repeated two", Field.Store.YES, Field.Index.ANALYZED));

 			writer.AddDocument(doc);
 			writer.Commit();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
             SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

 			TermPositions termPositions = reader.TermPositions(new Term("repeated", "repeated"));
 			Assert.IsTrue(termPositions.Next());
 			int freq = termPositions.Freq;
 			Assert.AreEqual(2, freq);
 			Assert.AreEqual(0, termPositions.NextPosition());
 			Assert.AreEqual(502, termPositions.NextPosition());
 		}

 		[Test]
 		public virtual void  TestTokenReuse()
 		{
 			Analyzer analyzer = new AnonymousClassAnalyzer1(this);

 			IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

 			Document doc = new Document();
 			doc.Add(new Field("f1", "a 5 a a", Field.Store.YES, Field.Index.ANALYZED));

 			writer.AddDocument(doc);
 			writer.Commit();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
             SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

 			TermPositions termPositions = reader.TermPositions(new Term("f1", "a"));
 			Assert.IsTrue(termPositions.Next());
 			int freq = termPositions.Freq;
 			Assert.AreEqual(3, freq);
 			Assert.AreEqual(0, termPositions.NextPosition());
 			Assert.AreEqual(true, termPositions.IsPayloadAvailable);
 			Assert.AreEqual(6, termPositions.NextPosition());
 			Assert.AreEqual(false, termPositions.IsPayloadAvailable);
 			Assert.AreEqual(7, termPositions.NextPosition());
 			Assert.AreEqual(false, termPositions.IsPayloadAvailable);
 		}


 		[Test]
 		public virtual void  TestPreAnalyzedField()
 		{
 			IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
 			Document doc = new Document();

 			doc.Add(new Field("preanalyzed", new AnonymousClassTokenStream(this), TermVector.NO));

 			writer.AddDocument(doc);
 			writer.Commit();
 			SegmentInfo info = writer.NewestSegment();
 			writer.Close();
             SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

 			TermPositions termPositions = reader.TermPositions(new Term("preanalyzed", "term1"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(1, termPositions.Freq);
 			Assert.AreEqual(0, termPositions.NextPosition());

 			termPositions.Seek(new Term("preanalyzed", "term2"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(2, termPositions.Freq);
 			Assert.AreEqual(1, termPositions.NextPosition());
 			Assert.AreEqual(3, termPositions.NextPosition());

 			termPositions.Seek(new Term("preanalyzed", "term3"));
 			Assert.IsTrue(termPositions.Next());
 			Assert.AreEqual(1, termPositions.Freq);
 			Assert.AreEqual(2, termPositions.NextPosition());
 		}

 		/// <summary> Test adding two fields with the same name, but
 		/// with different term vector setting (LUCENE-766).
 		/// </summary>
 		[Test]
 		public virtual void  TestMixedTermVectorSettingsSameField()
 		{
 			Document doc = new Document();
 			// f1 first without tv then with tv
 			doc.Add(new Field("f1", "v1", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.NO));
 			doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
 			// f2 first with tv then without tv
 			doc.Add(new Field("f2", "v1", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
 			doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.NO));

 		    IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_CURRENT), true,
 		                                         IndexWriter.MaxFieldLength.LIMITED);
 			writer.AddDocument(doc);
 			writer.Close();

 			_TestUtil.CheckIndex(dir);

 			IndexReader reader = IndexReader.Open(dir, true);
 			// f1
 			ITermFreqVector tfv1 = reader.GetTermFreqVector(0, "f1");
 			Assert.IsNotNull(tfv1);
 			Assert.AreEqual(2, tfv1.GetTerms().Length, "the 'with_tv' setting should rule!");
 			// f2
 			ITermFreqVector tfv2 = reader.GetTermFreqVector(0, "f2");
 			Assert.IsNotNull(tfv2);
 			Assert.AreEqual(2, tfv2.GetTerms().Length, "the 'with_tv' setting should rule!");
 		}

 		/// <summary> Test adding two fields with the same name, one indexed
 		/// the other stored only. The omitNorms and omitTermFreqAndPositions setting
 		/// of the stored field should not affect the indexed one (LUCENE-1590)
 		/// </summary>
 		[Test]
 		public virtual void  TestLUCENE_1590()
 		{
 			Document doc = new Document();
 			// f1 has no norms
 			doc.Add(new Field("f1", "v1", Field.Store.NO, Field.Index.ANALYZED_NO_NORMS));
 			doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.NO));
 			// f2 has no TF
 			Field f = new Field("f2", "v1", Field.Store.NO, Field.Index.ANALYZED);
 			f.OmitTermFreqAndPositions = true;
 			doc.Add(f);
 			doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.NO));

 			IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.LIMITED);
 			writer.AddDocument(doc);
 			writer.Optimize(); // be sure to have a single segment
 			writer.Close();

 			_TestUtil.CheckIndex(dir);

 			SegmentReader reader = SegmentReader.GetOnlySegmentReader(dir);
 			FieldInfos fi = reader.FieldInfos();
 			// f1
 			Assert.IsFalse(reader.HasNorms("f1"), "f1 should have no norms");
 			Assert.IsFalse(fi.FieldInfo("f1").omitTermFreqAndPositions_ForNUnit, "omitTermFreqAndPositions field bit should not be set for f1");
 			// f2
 			Assert.IsTrue(reader.HasNorms("f2"), "f2 should have norms");
 			Assert.IsTrue(fi.FieldInfo("f2").omitTermFreqAndPositions_ForNUnit, "omitTermFreqAndPositions field bit should be set for f2");
 		}
 	}
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You under the Apache License, Version 2.0
	* (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	using System;
	using Lucene.Net.Analysis.Tokenattributes;
	using Lucene.Net.Documents;
	using Lucene.Net.Util;
	using NUnit.Framework;

	using Analyzer = Lucene.Net.Analysis.Analyzer;
	using SimpleAnalyzer = Lucene.Net.Analysis.SimpleAnalyzer;
	using TokenFilter = Lucene.Net.Analysis.TokenFilter;
	using TokenStream = Lucene.Net.Analysis.TokenStream;
	using WhitespaceAnalyzer = Lucene.Net.Analysis.WhitespaceAnalyzer;
	using WhitespaceTokenizer = Lucene.Net.Analysis.WhitespaceTokenizer;
	using StandardAnalyzer = Lucene.Net.Analysis.Standard.StandardAnalyzer;
	using Document = Lucene.Net.Documents.Document;
	using Field = Lucene.Net.Documents.Field;
	using Index = Lucene.Net.Documents.Field.Index;
	using Store = Lucene.Net.Documents.Field.Store;
	using TermVector = Lucene.Net.Documents.Field.TermVector;
	using RAMDirectory = Lucene.Net.Store.RAMDirectory;
	using AttributeSource = Lucene.Net.Util.AttributeSource;
	using BaseTokenStreamTestCase = Lucene.Net.Test.Analysis.BaseTokenStreamTestCase;
	using _TestUtil = Lucene.Net.Util._TestUtil;

	namespace Lucene.Net.Index
	{

	[TestFixture]
	public class TestDocumentWriter : LuceneTestCase
	{
	private class AnonymousClassAnalyzer:Analyzer
	{
	public AnonymousClassAnalyzer(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
	{
	return new WhitespaceTokenizer(reader);
	}

	public override int GetPositionIncrementGap(System.String fieldName)
	{
	return 500;
	}
	}
	private class AnonymousClassAnalyzer1:Analyzer
	{
	public AnonymousClassAnalyzer1(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}
	private class AnonymousClassTokenFilter:TokenFilter
	{
	private void InitBlock(AnonymousClassAnalyzer1 enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	termAtt = AddAttribute<ITermAttribute>();
	payloadAtt = AddAttribute<IPayloadAttribute>();
	posIncrAtt = AddAttribute<IPositionIncrementAttribute>();
	}
	private AnonymousClassAnalyzer1 enclosingInstance;
	public AnonymousClassAnalyzer1 Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	internal AnonymousClassTokenFilter(AnonymousClassAnalyzer1 enclosingInstance, Lucene.Net.Analysis.TokenStream Param1):base(Param1)
	{
	InitBlock(enclosingInstance);
	}
	internal bool first = true;
	internal AttributeSource.State state;

	public override bool IncrementToken()
	{
	if (state != null)
	{
	RestoreState(state);
	payloadAtt.Payload = null;
	posIncrAtt.PositionIncrement = 0;
	termAtt.SetTermBuffer(new char[]{'b'}, 0, 1);
	state = null;
	return true;
	}

	bool hasNext = input.IncrementToken();
	if (!hasNext)
	return false;
	if (System.Char.IsDigit(termAtt.TermBuffer()[0]))
	{
	posIncrAtt.PositionIncrement = termAtt.TermBuffer()[0] - '0';
	}
	if (first)
	{
	// set payload on first position only
	payloadAtt.Payload = new Payload(new byte[]{100});
	first = false;
	}

	// index a "synonym" for every token
	state = CaptureState();
	return true;
	}

	internal ITermAttribute termAtt;
	internal IPayloadAttribute payloadAtt;
	internal IPositionIncrementAttribute posIncrAtt;
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
	{
	return new AnonymousClassTokenFilter(this, new WhitespaceTokenizer(reader));
	}
	}
	private class AnonymousClassTokenStream:TokenStream
	{
	public AnonymousClassTokenStream(TestDocumentWriter enclosingInstance)
	{
	InitBlock(enclosingInstance);
	}
	private void InitBlock(TestDocumentWriter enclosingInstance)
	{
	this.enclosingInstance = enclosingInstance;
	termAtt = AddAttribute<ITermAttribute>();
	}
	private TestDocumentWriter enclosingInstance;
	public TestDocumentWriter Enclosing_Instance
	{
	get
	{
	return enclosingInstance;
	}

	}
	private System.String[] tokens = new System.String[]{"term1", "term2", "term3", "term2"};
	private int index = 0;

	private ITermAttribute termAtt;

	public override bool IncrementToken()
	{
	if (index == tokens.Length)
	{
	return false;
	}
	else
	{
	ClearAttributes();
	termAtt.SetTermBuffer(tokens[index++]);
	return true;
	}
	}

	protected override void Dispose(bool disposing)
	{
	// Do Nothing
	}
	}
	private RAMDirectory dir;

	public TestDocumentWriter(System.String s):base(s)
	{
	}

	public TestDocumentWriter() : base("")
	{
	}

	[SetUp]
	public override void SetUp()
	{
	base.SetUp();
	dir = new RAMDirectory();
	}

	[Test]
	public virtual void Test()
	{
	Assert.IsTrue(dir != null);
	}

	[Test]
	public virtual void TestAddDocument()
	{
	Document testDoc = new Document();
	DocHelper.SetupDoc(testDoc);
	Analyzer analyzer = new WhitespaceAnalyzer();
	IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);
	writer.AddDocument(testDoc);
	writer.Commit();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	//After adding the document, we should be able to read it back in
	SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);
	Assert.IsTrue(reader != null);
	Document doc = reader.Document(0);
	Assert.IsTrue(doc != null);

	//System.out.println("Document: " + doc);
	IFieldable[] fields = doc.GetFields("textField2");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_2_TEXT));
	Assert.IsTrue(fields[0].IsTermVectorStored);

	fields = doc.GetFields("textField1");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_1_TEXT));
	Assert.IsFalse(fields[0].IsTermVectorStored);

	fields = doc.GetFields("keyField");
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.KEYWORD_TEXT));

	fields = doc.GetFields(DocHelper.NO_NORMS_KEY);
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.NO_NORMS_TEXT));

	fields = doc.GetFields(DocHelper.TEXT_FIELD_3_KEY);
	Assert.IsTrue(fields != null && fields.Length == 1);
	Assert.IsTrue(fields[0].StringValue.Equals(DocHelper.FIELD_3_TEXT));

	// test that the norms are not present in the segment if
	// omitNorms is true
	for (int i = 0; i < reader.core_ForNUnit.fieldInfos_ForNUnit.Size(); i++)
	{
	FieldInfo fi = reader.core_ForNUnit.fieldInfos_ForNUnit.FieldInfo(i);
	if (fi.isIndexed_ForNUnit)
	{
	Assert.IsTrue(fi.omitNorms_ForNUnit == !reader.HasNorms(fi.name_ForNUnit));
	}
	}
	}

	[Test]
	public virtual void TestPositionIncrementGap()
	{
	Analyzer analyzer = new AnonymousClassAnalyzer(this);

	IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

	Document doc = new Document();
	doc.Add(new Field("repeated", "repeated one", Field.Store.YES, Field.Index.ANALYZED));
	doc.Add(new Field("repeated", "repeated two", Field.Store.YES, Field.Index.ANALYZED));

	writer.AddDocument(doc);
	writer.Commit();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

	TermPositions termPositions = reader.TermPositions(new Term("repeated", "repeated"));
	Assert.IsTrue(termPositions.Next());
	int freq = termPositions.Freq;
	Assert.AreEqual(2, freq);
	Assert.AreEqual(0, termPositions.NextPosition());
	Assert.AreEqual(502, termPositions.NextPosition());
	}

	[Test]
	public virtual void TestTokenReuse()
	{
	Analyzer analyzer = new AnonymousClassAnalyzer1(this);

	IndexWriter writer = new IndexWriter(dir, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);

	Document doc = new Document();
	doc.Add(new Field("f1", "a 5 a a", Field.Store.YES, Field.Index.ANALYZED));

	writer.AddDocument(doc);
	writer.Commit();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

	TermPositions termPositions = reader.TermPositions(new Term("f1", "a"));
	Assert.IsTrue(termPositions.Next());
	int freq = termPositions.Freq;
	Assert.AreEqual(3, freq);
	Assert.AreEqual(0, termPositions.NextPosition());
	Assert.AreEqual(true, termPositions.IsPayloadAvailable);
	Assert.AreEqual(6, termPositions.NextPosition());
	Assert.AreEqual(false, termPositions.IsPayloadAvailable);
	Assert.AreEqual(7, termPositions.NextPosition());
	Assert.AreEqual(false, termPositions.IsPayloadAvailable);
	}


	[Test]
	public virtual void TestPreAnalyzedField()
	{
	IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
	Document doc = new Document();

	doc.Add(new Field("preanalyzed", new AnonymousClassTokenStream(this), TermVector.NO));

	writer.AddDocument(doc);
	writer.Commit();
	SegmentInfo info = writer.NewestSegment();
	writer.Close();
	SegmentReader reader = SegmentReader.Get(true, info, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);

	TermPositions termPositions = reader.TermPositions(new Term("preanalyzed", "term1"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(1, termPositions.Freq);
	Assert.AreEqual(0, termPositions.NextPosition());

	termPositions.Seek(new Term("preanalyzed", "term2"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(2, termPositions.Freq);
	Assert.AreEqual(1, termPositions.NextPosition());
	Assert.AreEqual(3, termPositions.NextPosition());

	termPositions.Seek(new Term("preanalyzed", "term3"));
	Assert.IsTrue(termPositions.Next());
	Assert.AreEqual(1, termPositions.Freq);
	Assert.AreEqual(2, termPositions.NextPosition());
	}

	/// <summary> Test adding two fields with the same name, but
	/// with different term vector setting (LUCENE-766).
	/// </summary>
	[Test]
	public virtual void TestMixedTermVectorSettingsSameField()
	{
	Document doc = new Document();
	// f1 first without tv then with tv
	doc.Add(new Field("f1", "v1", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.NO));
	doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
	// f2 first with tv then without tv
	doc.Add(new Field("f2", "v1", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
	doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.NOT_ANALYZED, TermVector.NO));

	IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_CURRENT), true,
	IndexWriter.MaxFieldLength.LIMITED);
	writer.AddDocument(doc);
	writer.Close();

	_TestUtil.CheckIndex(dir);

	IndexReader reader = IndexReader.Open(dir, true);
	// f1
	ITermFreqVector tfv1 = reader.GetTermFreqVector(0, "f1");
	Assert.IsNotNull(tfv1);
	Assert.AreEqual(2, tfv1.GetTerms().Length, "the 'with_tv' setting should rule!");
	// f2
	ITermFreqVector tfv2 = reader.GetTermFreqVector(0, "f2");
	Assert.IsNotNull(tfv2);
	Assert.AreEqual(2, tfv2.GetTerms().Length, "the 'with_tv' setting should rule!");
	}

	/// <summary> Test adding two fields with the same name, one indexed
	/// the other stored only. The omitNorms and omitTermFreqAndPositions setting
	/// of the stored field should not affect the indexed one (LUCENE-1590)
	/// </summary>
	[Test]
	public virtual void TestLUCENE_1590()
	{
	Document doc = new Document();
	// f1 has no norms
	doc.Add(new Field("f1", "v1", Field.Store.NO, Field.Index.ANALYZED_NO_NORMS));
	doc.Add(new Field("f1", "v2", Field.Store.YES, Field.Index.NO));
	// f2 has no TF
	Field f = new Field("f2", "v1", Field.Store.NO, Field.Index.ANALYZED);
	f.OmitTermFreqAndPositions = true;
	doc.Add(f);
	doc.Add(new Field("f2", "v2", Field.Store.YES, Field.Index.NO));

	IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.LIMITED);
	writer.AddDocument(doc);
	writer.Optimize(); // be sure to have a single segment
	writer.Close();

	_TestUtil.CheckIndex(dir);

	SegmentReader reader = SegmentReader.GetOnlySegmentReader(dir);
	FieldInfos fi = reader.FieldInfos();
	// f1
	Assert.IsFalse(reader.HasNorms("f1"), "f1 should have no norms");
	Assert.IsFalse(fi.FieldInfo("f1").omitTermFreqAndPositions_ForNUnit, "omitTermFreqAndPositions field bit should not be set for f1");
	// f2
	Assert.IsTrue(reader.HasNorms("f2"), "f2 should have norms");
	Assert.IsTrue(fi.FieldInfo("f2").omitTermFreqAndPositions_ForNUnit, "omitTermFreqAndPositions field bit should be set for f2");
	}
	}
	}