[29/34] lucenenet git commit: Raw porting of Lucene.Net.Analysis.Common

[sy...@apache.org]

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Core/WhitespaceTokenizerFactory.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Core/WhitespaceTokenizerFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/Core/WhitespaceTokenizerFactory.cs
new file mode 100644
index 0000000..51960b8
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Core/WhitespaceTokenizerFactory.cs
@@ -0,0 +1,58 @@
+using System.Collections.Generic;
+using Lucene.Net.Analysis.Core;
+using TokenizerFactory = Lucene.Net.Analysis.Util.TokenizerFactory;
+
+namespace org.apache.lucene.analysis.core
+{
+
+	/*
+	 * 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 TokenizerFactory = TokenizerFactory;
+	using AttributeFactory = org.apache.lucene.util.AttributeSource.AttributeFactory;
+
+
+	/// <summary>
+	/// Factory for <seealso cref="WhitespaceTokenizer"/>. 
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_ws" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.WhitespaceTokenizerFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre>
+	/// </summary>
+	public class WhitespaceTokenizerFactory : TokenizerFactory
+	{
+
+	  /// <summary>
+	  /// Creates a new WhitespaceTokenizerFactory </summary>
+	  public WhitespaceTokenizerFactory(IDictionary<string, string> args) : base(args)
+	  {
+		assureMatchVersion();
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override WhitespaceTokenizer create(AttributeFactory factory, Reader input)
+	  {
+		return new WhitespaceTokenizer(luceneMatchVersion, factory, input);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechAnalyzer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechAnalyzer.cs b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechAnalyzer.cs
new file mode 100644
index 0000000..230ecfd
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechAnalyzer.cs
@@ -0,0 +1,161 @@
+using System;
+
+namespace org.apache.lucene.analysis.cz
+{
+
+	/*
+	 * 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 LowerCaseFilter = org.apache.lucene.analysis.core.LowerCaseFilter;
+	using StopFilter = org.apache.lucene.analysis.core.StopFilter;
+	using SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using StandardFilter = org.apache.lucene.analysis.standard.StandardFilter;
+	using StandardTokenizer = org.apache.lucene.analysis.standard.StandardTokenizer;
+	using CharArraySet = org.apache.lucene.analysis.util.CharArraySet;
+	using StopwordAnalyzerBase = org.apache.lucene.analysis.util.StopwordAnalyzerBase;
+	using WordlistLoader = org.apache.lucene.analysis.util.WordlistLoader;
+	using IOUtils = org.apache.lucene.util.IOUtils;
+	using Version = org.apache.lucene.util.Version;
+
+
+	/// <summary>
+	/// <seealso cref="Analyzer"/> for Czech language.
+	/// <para>
+	/// Supports an external list of stopwords (words that will not be indexed at
+	/// all). A default set of stopwords is used unless an alternative list is
+	/// specified.
+	/// </para>
+	/// 
+	/// <a name="version"/>
+	/// <para>
+	/// You must specify the required <seealso cref="Version"/> compatibility when creating
+	/// CzechAnalyzer:
+	/// <ul>
+	/// <li>As of 3.1, words are stemmed with <seealso cref="CzechStemFilter"/>
+	/// <li>As of 2.9, StopFilter preserves position increments
+	/// <li>As of 2.4, Tokens incorrectly identified as acronyms are corrected (see
+	/// <a href="https://issues.apache.org/jira/browse/LUCENE-1068">LUCENE-1068</a>)
+	/// </ul>
+	/// </para>
+	/// </summary>
+	public sealed class CzechAnalyzer : StopwordAnalyzerBase
+	{
+	  /// <summary>
+	  /// File containing default Czech stopwords. </summary>
+	  public const string DEFAULT_STOPWORD_FILE = "stopwords.txt";
+
+	  /// <summary>
+	  /// Returns a set of default Czech-stopwords
+	  /// </summary>
+	  /// <returns> a set of default Czech-stopwords </returns>
+	  public static CharArraySet DefaultStopSet
+	  {
+		  get
+		  {
+			return DefaultSetHolder.DEFAULT_SET;
+		  }
+	  }
+
+	  private class DefaultSetHolder
+	  {
+		internal static readonly CharArraySet DEFAULT_SET;
+
+		static DefaultSetHolder()
+		{
+		  try
+		  {
+			DEFAULT_SET = WordlistLoader.getWordSet(IOUtils.getDecodingReader(typeof(CzechAnalyzer), DEFAULT_STOPWORD_FILE, StandardCharsets.UTF_8), "#", Version.LUCENE_CURRENT);
+		  }
+		  catch (IOException)
+		  {
+			// default set should always be present as it is part of the
+			// distribution (JAR)
+			throw new Exception("Unable to load default stopword set");
+		  }
+		}
+	  }
+
+
+	  private readonly CharArraySet stemExclusionTable;
+
+	  /// <summary>
+	  /// Builds an analyzer with the default stop words (<seealso cref="#getDefaultStopSet()"/>).
+	  /// </summary>
+	  /// <param name="matchVersion"> Lucene version to match See
+	  ///          <seealso cref="<a href="#version">above</a>"/> </param>
+	  public CzechAnalyzer(Version matchVersion) : this(matchVersion, DefaultSetHolder.DEFAULT_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words.
+	  /// </summary>
+	  /// <param name="matchVersion"> Lucene version to match See
+	  ///          <seealso cref="<a href="#version">above</a>"/> </param>
+	  /// <param name="stopwords"> a stopword set </param>
+	  public CzechAnalyzer(Version matchVersion, CharArraySet stopwords) : this(matchVersion, stopwords, CharArraySet.EMPTY_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words and a set of work to be
+	  /// excluded from the <seealso cref="CzechStemFilter"/>.
+	  /// </summary>
+	  /// <param name="matchVersion"> Lucene version to match See
+	  ///          <seealso cref="<a href="#version">above</a>"/> </param>
+	  /// <param name="stopwords"> a stopword set </param>
+	  /// <param name="stemExclusionTable"> a stemming exclusion set </param>
+	  public CzechAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable) : base(matchVersion, stopwords)
+	  {
+		this.stemExclusionTable = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stemExclusionTable));
+	  }
+
+	  /// <summary>
+	  /// Creates
+	  /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  /// used to tokenize all the text in the provided <seealso cref="Reader"/>.
+	  /// </summary>
+	  /// <returns> <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  ///         built from a <seealso cref="StandardTokenizer"/> filtered with
+	  ///         <seealso cref="StandardFilter"/>, <seealso cref="LowerCaseFilter"/>, <seealso cref="StopFilter"/>
+	  ///         , and <seealso cref="CzechStemFilter"/> (only if version is >= LUCENE_31). If
+	  ///         a version is >= LUCENE_31 and a stem exclusion set is provided via
+	  ///         <seealso cref="#CzechAnalyzer(Version, CharArraySet, CharArraySet)"/> a
+	  ///         <seealso cref="SetKeywordMarkerFilter"/> is added before
+	  ///         <seealso cref="CzechStemFilter"/>. </returns>
+	  protected internal override TokenStreamComponents createComponents(string fieldName, Reader reader)
+	  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final org.apache.lucene.analysis.Tokenizer source = new org.apache.lucene.analysis.standard.StandardTokenizer(matchVersion, reader);
+		Tokenizer source = new StandardTokenizer(matchVersion, reader);
+		TokenStream result = new StandardFilter(matchVersion, source);
+		result = new LowerCaseFilter(matchVersion, result);
+		result = new StopFilter(matchVersion, result, stopwords);
+		if (matchVersion.onOrAfter(Version.LUCENE_31))
+		{
+		  if (!this.stemExclusionTable.Empty)
+		  {
+			result = new SetKeywordMarkerFilter(result, stemExclusionTable);
+		  }
+		  result = new CzechStemFilter(result);
+		}
+		return new TokenStreamComponents(source, result);
+	  }
+	}
+
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilter.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilter.cs b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilter.cs
new file mode 100644
index 0000000..598cb86
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilter.cs
@@ -0,0 +1,67 @@
+namespace org.apache.lucene.analysis.cz
+{
+
+	using SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter; // for javadoc
+	using KeywordAttribute = org.apache.lucene.analysis.tokenattributes.KeywordAttribute;
+	using CharTermAttribute = org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+
+	/*
+	 * 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.
+	 */
+
+	/// <summary>
+	/// A <seealso cref="TokenFilter"/> that applies <seealso cref="CzechStemmer"/> to stem Czech words.
+	/// <para>
+	/// To prevent terms from being stemmed use an instance of
+	/// <seealso cref="SetKeywordMarkerFilter"/> or a custom <seealso cref="TokenFilter"/> that sets
+	/// the <seealso cref="KeywordAttribute"/> before this <seealso cref="TokenStream"/>.
+	/// </para>
+	/// <para><b>NOTE</b>: Input is expected to be in lowercase, 
+	/// but with diacritical marks</para> </summary>
+	/// <seealso cref= SetKeywordMarkerFilter </seealso>
+	public sealed class CzechStemFilter : TokenFilter
+	{
+	  private readonly CzechStemmer stemmer = new CzechStemmer();
+	  private readonly CharTermAttribute termAtt = addAttribute(typeof(CharTermAttribute));
+	  private readonly KeywordAttribute keywordAttr = addAttribute(typeof(KeywordAttribute));
+
+	  public CzechStemFilter(TokenStream input) : base(input)
+	  {
+	  }
+
+//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
+//ORIGINAL LINE: @Override public boolean incrementToken() throws java.io.IOException
+	  public override bool incrementToken()
+	  {
+		if (input.incrementToken())
+		{
+		  if (!keywordAttr.Keyword)
+		  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			termAtt.Length = newlen;
+		  }
+		  return true;
+		}
+		else
+		{
+		  return false;
+		}
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilterFactory.cs
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diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilterFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilterFactory.cs
new file mode 100644
index 0000000..7152da8
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemFilterFactory.cs
@@ -0,0 +1,55 @@
+using System.Collections.Generic;
+
+namespace org.apache.lucene.analysis.cz
+{
+
+	/*
+	 * 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 TokenFilterFactory = org.apache.lucene.analysis.util.TokenFilterFactory;
+
+	/// <summary>
+	/// Factory for <seealso cref="CzechStemFilter"/>.
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_czstem" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.StandardTokenizerFactory"/&gt;
+	///     &lt;filter class="solr.LowerCaseFilterFactory"/&gt;
+	///     &lt;filter class="solr.CzechStemFilterFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre>
+	/// </summary>
+	public class CzechStemFilterFactory : TokenFilterFactory
+	{
+
+	  /// <summary>
+	  /// Creates a new CzechStemFilterFactory </summary>
+	  public CzechStemFilterFactory(IDictionary<string, string> args) : base(args)
+	  {
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override TokenStream create(TokenStream input)
+	  {
+		return new CzechStemFilter(input);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemmer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemmer.cs b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemmer.cs
new file mode 100644
index 0000000..49ebc43
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Cz/CzechStemmer.cs
@@ -0,0 +1,157 @@
+namespace org.apache.lucene.analysis.cz
+{
+
+	/*
+	 * 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 org.apache.lucene.analysis.util;
+//JAVA TO C# CONVERTER TODO TASK: This Java 'import static' statement cannot be converted to C#:
+//	import static org.apache.lucene.analysis.util.StemmerUtil.*;
+
+	/// <summary>
+	/// Light Stemmer for Czech.
+	/// <para>
+	/// Implements the algorithm described in:  
+	/// <i>
+	/// Indexing and stemming approaches for the Czech language
+	/// </i>
+	/// http://portal.acm.org/citation.cfm?id=1598600
+	/// </para>
+	/// </summary>
+	public class CzechStemmer
+	{
+
+	  /// <summary>
+	  /// Stem an input buffer of Czech text.
+	  /// </summary>
+	  /// <param name="s"> input buffer </param>
+	  /// <param name="len"> length of input buffer </param>
+	  /// <returns> length of input buffer after normalization
+	  /// 
+	  /// <para><b>NOTE</b>: Input is expected to be in lowercase, 
+	  /// but with diacritical marks</para> </returns>
+	  public virtual int stem(char[] s, int len)
+	  {
+		len = removeCase(s, len);
+		len = removePossessives(s, len);
+		if (len > 0)
+		{
+		  len = normalize(s, len);
+		}
+		return len;
+	  }
+
+	  private int removeCase(char[] s, int len)
+	  {
+		if (len > 7 && StemmerUtil.EndsWith(s, len, "atech"))
+		{
+		  return len - 5;
+		}
+
+		if (len > 6 && (StemmerUtil.EndsWith(s, len,"ětem") || StemmerUtil.EndsWith(s, len,"etem") || StemmerUtil.EndsWith(s, len,"atům")))
+		{
+		  return len - 4;
+		}
+
+		if (len > 5 && (StemmerUtil.EndsWith(s, len, "ech") || StemmerUtil.EndsWith(s, len, "ich") || StemmerUtil.EndsWith(s, len, "ích") || StemmerUtil.EndsWith(s, len, "ého") || StemmerUtil.EndsWith(s, len, "ěmi") || StemmerUtil.EndsWith(s, len, "emi") || StemmerUtil.EndsWith(s, len, "ému") || StemmerUtil.EndsWith(s, len, "ěte") || StemmerUtil.EndsWith(s, len, "ete") || StemmerUtil.EndsWith(s, len, "ěti") || StemmerUtil.EndsWith(s, len, "eti") || StemmerUtil.EndsWith(s, len, "ího") || StemmerUtil.EndsWith(s, len, "iho") || StemmerUtil.EndsWith(s, len, "ími") || StemmerUtil.EndsWith(s, len, "ímu") || StemmerUtil.EndsWith(s, len, "imu") || StemmerUtil.EndsWith(s, len, "ách") || StemmerUtil.EndsWith(s, len, "ata") || StemmerUtil.EndsWith(s, len, "aty") || StemmerUtil.EndsWith(s, len, "ých") || StemmerUtil.EndsWith(s, len, "ama") || StemmerUtil.EndsWith(s, len, "ami") || StemmerUtil.EndsWith(s, len, "ové") || StemmerUtil.EndsWith(s, len, "ovi") || StemmerUtil.EndsWith(s, len, "�
 �mi")))
+		{
+		  return len - 3;
+		}
+
+		if (len > 4 && (StemmerUtil.EndsWith(s, len, "em") || StemmerUtil.EndsWith(s, len, "es") || StemmerUtil.EndsWith(s, len, "ém") || StemmerUtil.EndsWith(s, len, "ím") || StemmerUtil.EndsWith(s, len, "ům") || StemmerUtil.EndsWith(s, len, "at") || StemmerUtil.EndsWith(s, len, "ám") || StemmerUtil.EndsWith(s, len, "os") || StemmerUtil.EndsWith(s, len, "us") || StemmerUtil.EndsWith(s, len, "ým") || StemmerUtil.EndsWith(s, len, "mi") || StemmerUtil.EndsWith(s, len, "ou")))
+		{
+		  return len - 2;
+		}
+
+		if (len > 3)
+		{
+		  switch (s[len - 1])
+		  {
+			case 'a':
+			case 'e':
+			case 'i':
+			case 'o':
+			case 'u':
+			case 'ů':
+			case 'y':
+			case 'á':
+			case 'é':
+			case 'í':
+			case 'ý':
+			case 'ě':
+			  return len - 1;
+		  }
+		}
+
+		return len;
+	  }
+
+	  private int removePossessives(char[] s, int len)
+	  {
+		if (len > 5 && (StemmerUtil.EndsWith(s, len, "ov") || StemmerUtil.EndsWith(s, len, "in") || StemmerUtil.EndsWith(s, len, "ův")))
+		{
+		  return len - 2;
+		}
+
+		return len;
+	  }
+
+	  private int normalize(char[] s, int len)
+	  {
+		if (StemmerUtil.EndsWith(s, len, "čt")) // čt -> ck
+		{
+		  s[len - 2] = 'c';
+		  s[len - 1] = 'k';
+		  return len;
+		}
+
+		if (StemmerUtil.EndsWith(s, len, "št")) // št -> sk
+		{
+		  s[len - 2] = 's';
+		  s[len - 1] = 'k';
+		  return len;
+		}
+
+		switch (s[len - 1])
+		{
+		  case 'c': // [cč] -> k
+		  case 'č':
+			s[len - 1] = 'k';
+			return len;
+		  case 'z': // [zž] -> h
+		  case 'ž':
+			s[len - 1] = 'h';
+			return len;
+		}
+
+		if (len > 1 && s[len - 2] == 'e')
+		{
+		  s[len - 2] = s[len - 1]; // e* > *
+		  return len - 1;
+		}
+
+		if (len > 2 && s[len - 2] == 'ů')
+		{
+		  s[len - 2] = 'o'; // *ů* -> *o*
+		  return len;
+		}
+
+		return len;
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/Da/DanishAnalyzer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/Da/DanishAnalyzer.cs b/src/Lucene.Net.Analysis.Common/Analysis/Da/DanishAnalyzer.cs
new file mode 100644
index 0000000..b02657b
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/Da/DanishAnalyzer.cs
@@ -0,0 +1,139 @@
+using System;
+
+namespace org.apache.lucene.analysis.da
+{
+
+	/*
+	 * 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 LowerCaseFilter = org.apache.lucene.analysis.core.LowerCaseFilter;
+	using StopFilter = org.apache.lucene.analysis.core.StopFilter;
+	using SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using SnowballFilter = org.apache.lucene.analysis.snowball.SnowballFilter;
+	using StandardFilter = org.apache.lucene.analysis.standard.StandardFilter;
+	using StandardTokenizer = org.apache.lucene.analysis.standard.StandardTokenizer;
+	using CharArraySet = org.apache.lucene.analysis.util.CharArraySet;
+	using StopwordAnalyzerBase = org.apache.lucene.analysis.util.StopwordAnalyzerBase;
+	using WordlistLoader = org.apache.lucene.analysis.util.WordlistLoader;
+	using IOUtils = org.apache.lucene.util.IOUtils;
+	using Version = org.apache.lucene.util.Version;
+	using DanishStemmer = org.tartarus.snowball.ext.DanishStemmer;
+
+	/// <summary>
+	/// <seealso cref="Analyzer"/> for Danish.
+	/// </summary>
+	public sealed class DanishAnalyzer : StopwordAnalyzerBase
+	{
+	  private readonly CharArraySet stemExclusionSet;
+
+	  /// <summary>
+	  /// File containing default Danish stopwords. </summary>
+	  public const string DEFAULT_STOPWORD_FILE = "danish_stop.txt";
+
+	  /// <summary>
+	  /// Returns an unmodifiable instance of the default stop words set. </summary>
+	  /// <returns> default stop words set. </returns>
+	  public static CharArraySet DefaultStopSet
+	  {
+		  get
+		  {
+			return DefaultSetHolder.DEFAULT_STOP_SET;
+		  }
+	  }
+
+	  /// <summary>
+	  /// Atomically loads the DEFAULT_STOP_SET in a lazy fashion once the outer class 
+	  /// accesses the static final set the first time.;
+	  /// </summary>
+	  private class DefaultSetHolder
+	  {
+		internal static readonly CharArraySet DEFAULT_STOP_SET;
+
+		static DefaultSetHolder()
+		{
+		  try
+		  {
+			DEFAULT_STOP_SET = WordlistLoader.getSnowballWordSet(IOUtils.getDecodingReader(typeof(SnowballFilter), DEFAULT_STOPWORD_FILE, StandardCharsets.UTF_8), Version.LUCENE_CURRENT);
+		  }
+		  catch (IOException)
+		  {
+			// default set should always be present as it is part of the
+			// distribution (JAR)
+			throw new Exception("Unable to load default stopword set");
+		  }
+		}
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the default stop words: <seealso cref="#DEFAULT_STOPWORD_FILE"/>.
+	  /// </summary>
+	  public DanishAnalyzer(Version matchVersion) : this(matchVersion, DefaultSetHolder.DEFAULT_STOP_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words.
+	  /// </summary>
+	  /// <param name="matchVersion"> lucene compatibility version </param>
+	  /// <param name="stopwords"> a stopword set </param>
+	  public DanishAnalyzer(Version matchVersion, CharArraySet stopwords) : this(matchVersion, stopwords, CharArraySet.EMPTY_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words. If a non-empty stem exclusion set is
+	  /// provided this analyzer will add a <seealso cref="SetKeywordMarkerFilter"/> before
+	  /// stemming.
+	  /// </summary>
+	  /// <param name="matchVersion"> lucene compatibility version </param>
+	  /// <param name="stopwords"> a stopword set </param>
+	  /// <param name="stemExclusionSet"> a set of terms not to be stemmed </param>
+	  public DanishAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionSet) : base(matchVersion, stopwords)
+	  {
+		this.stemExclusionSet = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stemExclusionSet));
+	  }
+
+	  /// <summary>
+	  /// Creates a
+	  /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  /// which tokenizes all the text in the provided <seealso cref="Reader"/>.
+	  /// </summary>
+	  /// <returns> A
+	  ///         <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  ///         built from an <seealso cref="StandardTokenizer"/> filtered with
+	  ///         <seealso cref="StandardFilter"/>, <seealso cref="LowerCaseFilter"/>, <seealso cref="StopFilter"/>
+	  ///         , <seealso cref="SetKeywordMarkerFilter"/> if a stem exclusion set is
+	  ///         provided and <seealso cref="SnowballFilter"/>. </returns>
+	  protected internal override TokenStreamComponents createComponents(string fieldName, Reader reader)
+	  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final org.apache.lucene.analysis.Tokenizer source = new org.apache.lucene.analysis.standard.StandardTokenizer(matchVersion, reader);
+		Tokenizer source = new StandardTokenizer(matchVersion, reader);
+		TokenStream result = new StandardFilter(matchVersion, source);
+		result = new LowerCaseFilter(matchVersion, result);
+		result = new StopFilter(matchVersion, result, stopwords);
+		if (!stemExclusionSet.Empty)
+		{
+		  result = new SetKeywordMarkerFilter(result, stemExclusionSet);
+		}
+		result = new SnowballFilter(result, new DanishStemmer());
+		return new TokenStreamComponents(source, result);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanAnalyzer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanAnalyzer.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanAnalyzer.cs
new file mode 100644
index 0000000..13da913
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanAnalyzer.cs
@@ -0,0 +1,185 @@
+using System;
+
+namespace org.apache.lucene.analysis.de
+{
+	// This file is encoded in UTF-8
+
+	/*
+	 * 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 LowerCaseFilter = org.apache.lucene.analysis.core.LowerCaseFilter;
+	using StopFilter = org.apache.lucene.analysis.core.StopFilter;
+	using SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using SnowballFilter = org.apache.lucene.analysis.snowball.SnowballFilter;
+	using StandardAnalyzer = org.apache.lucene.analysis.standard.StandardAnalyzer;
+	using StandardFilter = org.apache.lucene.analysis.standard.StandardFilter;
+	using StandardTokenizer = org.apache.lucene.analysis.standard.StandardTokenizer;
+	using CharArraySet = org.apache.lucene.analysis.util.CharArraySet;
+	using StopwordAnalyzerBase = org.apache.lucene.analysis.util.StopwordAnalyzerBase;
+	using WordlistLoader = org.apache.lucene.analysis.util.WordlistLoader;
+	using IOUtils = org.apache.lucene.util.IOUtils;
+	using Version = org.apache.lucene.util.Version;
+	using German2Stemmer = org.tartarus.snowball.ext.German2Stemmer;
+
+	/// <summary>
+	/// <seealso cref="Analyzer"/> for German language. 
+	/// <para>
+	/// Supports an external list of stopwords (words that
+	/// will not be indexed at all) and an external list of exclusions (word that will
+	/// not be stemmed, but indexed).
+	/// A default set of stopwords is used unless an alternative list is specified, but the
+	/// exclusion list is empty by default.
+	/// </para>
+	/// 
+	/// <a name="version"/>
+	/// <para>You must specify the required <seealso cref="Version"/>
+	/// compatibility when creating GermanAnalyzer:
+	/// <ul>
+	///   <li> As of 3.6, GermanLightStemFilter is used for less aggressive stemming.
+	///   <li> As of 3.1, Snowball stemming is done with SnowballFilter, and 
+	///        Snowball stopwords are used by default.
+	///   <li> As of 2.9, StopFilter preserves position
+	///        increments
+	/// </ul>
+	/// 
+	/// </para>
+	/// <para><b>NOTE</b>: This class uses the same <seealso cref="Version"/>
+	/// dependent settings as <seealso cref="StandardAnalyzer"/>.</para>
+	/// </summary>
+	public sealed class GermanAnalyzer : StopwordAnalyzerBase
+	{
+
+	  /// @deprecated in 3.1, remove in Lucene 5.0 (index bw compat) 
+	  [Obsolete("in 3.1, remove in Lucene 5.0 (index bw compat)")]
+	  private static readonly string[] GERMAN_STOP_WORDS = new string[] {"einer", "eine", "eines", "einem", "einen", "der", "die", "das", "dass", "daß", "du", "er", "sie", "es", "was", "wer", "wie", "wir", "und", "oder", "ohne", "mit", "am", "im", "in", "aus", "auf", "ist", "sein", "war", "wird", "ihr", "ihre", "ihres", "als", "für", "von", "mit", "dich", "dir", "mich", "mir", "mein", "sein", "kein", "durch", "wegen", "wird"};
+
+	  /// <summary>
+	  /// File containing default German stopwords. </summary>
+	  public const string DEFAULT_STOPWORD_FILE = "german_stop.txt";
+
+	  /// <summary>
+	  /// Returns a set of default German-stopwords </summary>
+	  /// <returns> a set of default German-stopwords  </returns>
+	  public static CharArraySet DefaultStopSet
+	  {
+		  get
+		  {
+			return DefaultSetHolder.DEFAULT_SET;
+		  }
+	  }
+
+	  private class DefaultSetHolder
+	  {
+		/// @deprecated in 3.1, remove in Lucene 5.0 (index bw compat) 
+		[Obsolete("in 3.1, remove in Lucene 5.0 (index bw compat)")]
+		internal static readonly CharArraySet DEFAULT_SET_30 = CharArraySet.unmodifiableSet(new CharArraySet(Version.LUCENE_CURRENT, Arrays.asList(GERMAN_STOP_WORDS), false));
+		internal static readonly CharArraySet DEFAULT_SET;
+		static DefaultSetHolder()
+		{
+		  try
+		  {
+			DEFAULT_SET = WordlistLoader.getSnowballWordSet(IOUtils.getDecodingReader(typeof(SnowballFilter), DEFAULT_STOPWORD_FILE, StandardCharsets.UTF_8), Version.LUCENE_CURRENT);
+		  }
+		  catch (IOException)
+		  {
+			// default set should always be present as it is part of the
+			// distribution (JAR)
+			throw new Exception("Unable to load default stopword set");
+		  }
+		}
+	  }
+
+	  /// <summary>
+	  /// Contains the stopwords used with the <seealso cref="StopFilter"/>.
+	  /// </summary>
+
+	  /// <summary>
+	  /// Contains words that should be indexed but not stemmed.
+	  /// </summary>
+	  private readonly CharArraySet exclusionSet;
+
+	  /// <summary>
+	  /// Builds an analyzer with the default stop words:
+	  /// <seealso cref="#getDefaultStopSet()"/>.
+	  /// </summary>
+	  public GermanAnalyzer(Version matchVersion) : this(matchVersion, matchVersion.onOrAfter(Version.LUCENE_31) ? DefaultSetHolder.DEFAULT_SET : DefaultSetHolder.DEFAULT_SET_30)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words 
+	  /// </summary>
+	  /// <param name="matchVersion">
+	  ///          lucene compatibility version </param>
+	  /// <param name="stopwords">
+	  ///          a stopword set </param>
+	  public GermanAnalyzer(Version matchVersion, CharArraySet stopwords) : this(matchVersion, stopwords, CharArraySet.EMPTY_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words
+	  /// </summary>
+	  /// <param name="matchVersion">
+	  ///          lucene compatibility version </param>
+	  /// <param name="stopwords">
+	  ///          a stopword set </param>
+	  /// <param name="stemExclusionSet">
+	  ///          a stemming exclusion set </param>
+	  public GermanAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionSet) : base(matchVersion, stopwords)
+	  {
+		exclusionSet = CharArraySet.unmodifiableSet(CharArraySet.copy(matchVersion, stemExclusionSet));
+	  }
+
+	  /// <summary>
+	  /// Creates
+	  /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  /// used to tokenize all the text in the provided <seealso cref="Reader"/>.
+	  /// </summary>
+	  /// <returns> <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  ///         built from a <seealso cref="StandardTokenizer"/> filtered with
+	  ///         <seealso cref="StandardFilter"/>, <seealso cref="LowerCaseFilter"/>, <seealso cref="StopFilter"/>
+	  ///         , <seealso cref="SetKeywordMarkerFilter"/> if a stem exclusion set is
+	  ///         provided, <seealso cref="GermanNormalizationFilter"/> and <seealso cref="GermanLightStemFilter"/> </returns>
+	  protected internal override TokenStreamComponents createComponents(string fieldName, Reader reader)
+	  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final org.apache.lucene.analysis.Tokenizer source = new org.apache.lucene.analysis.standard.StandardTokenizer(matchVersion, reader);
+		Tokenizer source = new StandardTokenizer(matchVersion, reader);
+		TokenStream result = new StandardFilter(matchVersion, source);
+		result = new LowerCaseFilter(matchVersion, result);
+		result = new StopFilter(matchVersion, result, stopwords);
+		result = new SetKeywordMarkerFilter(result, exclusionSet);
+		if (matchVersion.onOrAfter(Version.LUCENE_36))
+		{
+		  result = new GermanNormalizationFilter(result);
+		  result = new GermanLightStemFilter(result);
+		}
+		else if (matchVersion.onOrAfter(Version.LUCENE_31))
+		{
+		  result = new SnowballFilter(result, new German2Stemmer());
+		}
+		else
+		{
+		  result = new GermanStemFilter(result);
+		}
+		return new TokenStreamComponents(source, result);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilter.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilter.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilter.cs
new file mode 100644
index 0000000..57997f8
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilter.cs
@@ -0,0 +1,66 @@
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using CharTermAttribute = org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+	using KeywordAttribute = org.apache.lucene.analysis.tokenattributes.KeywordAttribute;
+
+	/// <summary>
+	/// A <seealso cref="TokenFilter"/> that applies <seealso cref="GermanLightStemmer"/> to stem German
+	/// words.
+	/// <para>
+	/// To prevent terms from being stemmed use an instance of
+	/// <seealso cref="SetKeywordMarkerFilter"/> or a custom <seealso cref="TokenFilter"/> that sets
+	/// the <seealso cref="KeywordAttribute"/> before this <seealso cref="TokenStream"/>.
+	/// </para>
+	/// </summary>
+	public sealed class GermanLightStemFilter : TokenFilter
+	{
+	  private readonly GermanLightStemmer stemmer = new GermanLightStemmer();
+	  private readonly CharTermAttribute termAtt = addAttribute(typeof(CharTermAttribute));
+	  private readonly KeywordAttribute keywordAttr = addAttribute(typeof(KeywordAttribute));
+
+	  public GermanLightStemFilter(TokenStream input) : base(input)
+	  {
+	  }
+
+//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
+//ORIGINAL LINE: @Override public boolean incrementToken() throws java.io.IOException
+	  public override bool incrementToken()
+	  {
+		if (input.incrementToken())
+		{
+		  if (!keywordAttr.Keyword)
+		  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			termAtt.Length = newlen;
+		  }
+		  return true;
+		}
+		else
+		{
+		  return false;
+		}
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilterFactory.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilterFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilterFactory.cs
new file mode 100644
index 0000000..0f8746e
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemFilterFactory.cs
@@ -0,0 +1,55 @@
+using System.Collections.Generic;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 TokenFilterFactory = org.apache.lucene.analysis.util.TokenFilterFactory;
+
+	/// <summary>
+	/// Factory for <seealso cref="GermanLightStemFilter"/>.
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_delgtstem" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.StandardTokenizerFactory"/&gt;
+	///     &lt;filter class="solr.LowerCaseFilterFactory"/&gt;
+	///     &lt;filter class="solr.GermanLightStemFilterFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre>
+	/// </summary>
+	public class GermanLightStemFilterFactory : TokenFilterFactory
+	{
+
+	  /// <summary>
+	  /// Creates a new GermanLightStemFilterFactory </summary>
+	  public GermanLightStemFilterFactory(IDictionary<string, string> args) : base(args)
+	  {
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override TokenStream create(TokenStream input)
+	  {
+		return new GermanLightStemFilter(input);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemmer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemmer.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemmer.cs
new file mode 100644
index 0000000..87307ec
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanLightStemmer.cs
@@ -0,0 +1,177 @@
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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.
+	 */
+
+	/* 
+	 * This algorithm is updated based on code located at:
+	 * http://members.unine.ch/jacques.savoy/clef/
+	 * 
+	 * Full copyright for that code follows:
+	 */
+
+	/*
+	 * Copyright (c) 2005, Jacques Savoy
+	 * All rights reserved.
+	 *
+	 * Redistribution and use in source and binary forms, with or without 
+	 * modification, are permitted provided that the following conditions are met:
+	 *
+	 * Redistributions of source code must retain the above copyright notice, this 
+	 * list of conditions and the following disclaimer. Redistributions in binary 
+	 * form must reproduce the above copyright notice, this list of conditions and
+	 * the following disclaimer in the documentation and/or other materials 
+	 * provided with the distribution. Neither the name of the author nor the names 
+	 * of its contributors may be used to endorse or promote products derived from 
+	 * this software without specific prior written permission.
+	 * 
+	 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+	 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+	 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+	 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+	 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+	 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+	 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+	 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+	 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+	 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+	 * POSSIBILITY OF SUCH DAMAGE.
+	 */
+
+	/// <summary>
+	/// Light Stemmer for German.
+	/// <para>
+	/// This stemmer implements the "UniNE" algorithm in:
+	/// <i>Light Stemming Approaches for the French, Portuguese, German and Hungarian Languages</i>
+	/// Jacques Savoy
+	/// </para>
+	/// </summary>
+	public class GermanLightStemmer
+	{
+
+	  public virtual int stem(char[] s, int len)
+	  {
+		for (int i = 0; i < len; i++)
+		{
+		  switch (s[i])
+		  {
+			case 'ä':
+			case 'à':
+			case 'á':
+			case 'â':
+				s[i] = 'a';
+				break;
+			case 'ö':
+			case 'ò':
+			case 'ó':
+			case 'ô':
+				s[i] = 'o';
+				break;
+			case 'ï':
+			case 'ì':
+			case 'í':
+			case 'î':
+				s[i] = 'i';
+				break;
+			case 'ü':
+			case 'ù':
+			case 'ú':
+			case 'û':
+				s[i] = 'u';
+				break;
+		  }
+		}
+
+		len = step1(s, len);
+		return step2(s, len);
+	  }
+
+	  private bool stEnding(char ch)
+	  {
+		switch (ch)
+		{
+		  case 'b':
+		  case 'd':
+		  case 'f':
+		  case 'g':
+		  case 'h':
+		  case 'k':
+		  case 'l':
+		  case 'm':
+		  case 'n':
+		  case 't':
+			  return true;
+		  default:
+			  return false;
+		}
+	  }
+
+	  private int step1(char[] s, int len)
+	  {
+		if (len > 5 && s[len - 3] == 'e' && s[len - 2] == 'r' && s[len - 1] == 'n')
+		{
+		  return len - 3;
+		}
+
+		if (len > 4 && s[len - 2] == 'e')
+		{
+		  switch (s[len - 1])
+		  {
+			case 'm':
+			case 'n':
+			case 'r':
+			case 's':
+				return len - 2;
+		  }
+		}
+
+		if (len > 3 && s[len - 1] == 'e')
+		{
+		  return len - 1;
+		}
+
+		if (len > 3 && s[len - 1] == 's' && stEnding(s[len - 2]))
+		{
+		  return len - 1;
+		}
+
+		return len;
+	  }
+
+	  private int step2(char[] s, int len)
+	  {
+		if (len > 5 && s[len - 3] == 'e' && s[len - 2] == 's' && s[len - 1] == 't')
+		{
+		  return len - 3;
+		}
+
+		if (len > 4 && s[len - 2] == 'e' && (s[len - 1] == 'r' || s[len - 1] == 'n'))
+		{
+		  return len - 2;
+		}
+
+		if (len > 4 && s[len - 2] == 's' && s[len - 1] == 't' && stEnding(s[len - 3]))
+		{
+		  return len - 2;
+		}
+
+		return len;
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilter.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilter.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilter.cs
new file mode 100644
index 0000000..ca93a4e
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilter.cs
@@ -0,0 +1,66 @@
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using CharTermAttribute = org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+	using KeywordAttribute = org.apache.lucene.analysis.tokenattributes.KeywordAttribute;
+
+	/// <summary>
+	/// A <seealso cref="TokenFilter"/> that applies <seealso cref="GermanMinimalStemmer"/> to stem German
+	/// words.
+	/// <para>
+	/// To prevent terms from being stemmed use an instance of
+	/// <seealso cref="SetKeywordMarkerFilter"/> or a custom <seealso cref="TokenFilter"/> that sets
+	/// the <seealso cref="KeywordAttribute"/> before this <seealso cref="TokenStream"/>.
+	/// </para>
+	/// </summary>
+	public sealed class GermanMinimalStemFilter : TokenFilter
+	{
+	  private readonly GermanMinimalStemmer stemmer = new GermanMinimalStemmer();
+	  private readonly CharTermAttribute termAtt = addAttribute(typeof(CharTermAttribute));
+	  private readonly KeywordAttribute keywordAttr = addAttribute(typeof(KeywordAttribute));
+
+	  public GermanMinimalStemFilter(TokenStream input) : base(input)
+	  {
+	  }
+
+//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
+//ORIGINAL LINE: @Override public boolean incrementToken() throws java.io.IOException
+	  public override bool incrementToken()
+	  {
+		if (input.incrementToken())
+		{
+		  if (!keywordAttr.Keyword)
+		  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			int newlen = stemmer.stem(termAtt.buffer(), termAtt.length());
+			termAtt.Length = newlen;
+		  }
+		  return true;
+		}
+		else
+		{
+		  return false;
+		}
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilterFactory.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilterFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilterFactory.cs
new file mode 100644
index 0000000..bb72f4b
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemFilterFactory.cs
@@ -0,0 +1,55 @@
+using System.Collections.Generic;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 TokenFilterFactory = org.apache.lucene.analysis.util.TokenFilterFactory;
+
+	/// <summary>
+	/// Factory for <seealso cref="GermanMinimalStemFilter"/>.
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_deminstem" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.StandardTokenizerFactory"/&gt;
+	///     &lt;filter class="solr.LowerCaseFilterFactory"/&gt;
+	///     &lt;filter class="solr.GermanMinimalStemFilterFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre>
+	/// </summary>
+	public class GermanMinimalStemFilterFactory : TokenFilterFactory
+	{
+
+	  /// <summary>
+	  /// Creates a new GermanMinimalStemFilterFactory </summary>
+	  public GermanMinimalStemFilterFactory(IDictionary<string, string> args) : base(args)
+	  {
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override TokenStream create(TokenStream input)
+	  {
+		return new GermanMinimalStemFilter(input);
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemmer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemmer.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemmer.cs
new file mode 100644
index 0000000..a1e109d
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanMinimalStemmer.cs
@@ -0,0 +1,151 @@
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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.
+	 */
+
+	/* 
+	 * This algorithm is updated based on code located at:
+	 * http://members.unine.ch/jacques.savoy/clef/
+	 * 
+	 * Full copyright for that code follows:
+	 */
+
+	/*
+	 * Copyright (c) 2005, Jacques Savoy
+	 * All rights reserved.
+	 *
+	 * Redistribution and use in source and binary forms, with or without 
+	 * modification, are permitted provided that the following conditions are met:
+	 *
+	 * Redistributions of source code must retain the above copyright notice, this 
+	 * list of conditions and the following disclaimer. Redistributions in binary 
+	 * form must reproduce the above copyright notice, this list of conditions and
+	 * the following disclaimer in the documentation and/or other materials 
+	 * provided with the distribution. Neither the name of the author nor the names 
+	 * of its contributors may be used to endorse or promote products derived from 
+	 * this software without specific prior written permission.
+	 * 
+	 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+	 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+	 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+	 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+	 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+	 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+	 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+	 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+	 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+	 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+	 * POSSIBILITY OF SUCH DAMAGE.
+	 */
+
+	/// <summary>
+	/// Minimal Stemmer for German.
+	/// <para>
+	/// This stemmer implements the following algorithm:
+	/// <i>Morphologie et recherche d'information</i>
+	/// Jacques Savoy.
+	/// </para>
+	/// </summary>
+	public class GermanMinimalStemmer
+	{
+
+	  public virtual int stem(char[] s, int len)
+	  {
+		if (len < 5)
+		{
+		  return len;
+		}
+
+		for (int i = 0; i < len; i++)
+		{
+		  switch (s[i])
+		  {
+			case 'ä':
+				s[i] = 'a';
+				break;
+			case 'ö':
+				s[i] = 'o';
+				break;
+			case 'ü':
+				s[i] = 'u';
+				break;
+		  }
+		}
+
+		if (len > 6 && s[len - 3] == 'n' && s[len - 2] == 'e' && s[len - 1] == 'n')
+		{
+			return len - 3;
+		}
+
+		if (len > 5)
+		{
+		  switch (s[len - 1])
+		  {
+			case 'n':
+				if (s[len - 2] == 'e')
+				{
+					return len - 2;
+				}
+				else
+				{
+					break;
+				}
+			case 'e':
+				if (s[len - 2] == 's')
+				{
+					return len - 2;
+				}
+				else
+				{
+					break;
+				}
+			case 's':
+				if (s[len - 2] == 'e')
+				{
+					return len - 2;
+				}
+				else
+				{
+					break;
+				}
+			case 'r':
+				if (s[len - 2] == 'e')
+				{
+					return len - 2;
+				}
+				else
+				{
+					break;
+				}
+		  }
+		}
+
+		switch (s[len - 1])
+		{
+		  case 'n':
+		  case 'e':
+		  case 's':
+		  case 'r':
+			  return len - 1;
+		}
+
+		return len;
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilter.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilter.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilter.cs
new file mode 100644
index 0000000..19fcbf7
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilter.cs
@@ -0,0 +1,130 @@
+using System;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 CharTermAttribute = org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+	using StemmerUtil = org.apache.lucene.analysis.util.StemmerUtil;
+
+	/// <summary>
+	/// Normalizes German characters according to the heuristics
+	/// of the <a href="http://snowball.tartarus.org/algorithms/german2/stemmer.html">
+	/// German2 snowball algorithm</a>.
+	/// It allows for the fact that ä, ö and ü are sometimes written as ae, oe and ue.
+	/// <para>
+	/// <ul>
+	///   <li> 'ß' is replaced by 'ss'
+	///   <li> 'ä', 'ö', 'ü' are replaced by 'a', 'o', 'u', respectively.
+	///   <li> 'ae' and 'oe' are replaced by 'a', and 'o', respectively.
+	///   <li> 'ue' is replaced by 'u', when not following a vowel or q.
+	/// </ul>
+	/// </para>
+	/// <para>
+	/// This is useful if you want this normalization without using
+	/// the German2 stemmer, or perhaps no stemming at all.
+	/// </para>
+	/// </summary>
+	public sealed class GermanNormalizationFilter : TokenFilter
+	{
+	  // FSM with 3 states:
+	  private const int N = 0; // ordinary state
+	  private const int V = 1; // stops 'u' from entering umlaut state
+	  private const int U = 2; // umlaut state, allows e-deletion
+
+	  private readonly CharTermAttribute termAtt = addAttribute(typeof(CharTermAttribute));
+
+	  public GermanNormalizationFilter(TokenStream input) : base(input)
+	  {
+	  }
+
+//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
+//ORIGINAL LINE: @Override public boolean incrementToken() throws java.io.IOException
+	  public override bool incrementToken()
+	  {
+		if (input.incrementToken())
+		{
+		  int state = N;
+		  char[] buffer = termAtt.buffer();
+		  int length = termAtt.length();
+		  for (int i = 0; i < length; i++)
+		  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final char c = buffer[i];
+			char c = buffer[i];
+			switch (c)
+			{
+			  case 'a':
+			  case 'o':
+				state = U;
+				break;
+			  case 'u':
+				state = (state == N) ? U : V;
+				break;
+			  case 'e':
+				if (state == U)
+				{
+				  length = StemmerUtil.delete(buffer, i--, length);
+				}
+				state = V;
+				break;
+			  case 'i':
+			  case 'q':
+			  case 'y':
+				state = V;
+				break;
+			  case 'ä':
+				buffer[i] = 'a';
+				state = V;
+				break;
+			  case 'ö':
+				buffer[i] = 'o';
+				state = V;
+				break;
+			  case 'ü':
+				buffer[i] = 'u';
+				state = V;
+				break;
+			  case 'ß':
+				buffer[i++] = 's';
+				buffer = termAtt.resizeBuffer(1 + length);
+				if (i < length)
+				{
+				  Array.Copy(buffer, i, buffer, i + 1, (length - i));
+				}
+				buffer[i] = 's';
+				length++;
+				state = N;
+				break;
+			  default:
+				state = N;
+			break;
+			}
+		  }
+		  termAtt.Length = length;
+		  return true;
+		}
+		else
+		{
+		  return false;
+		}
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilterFactory.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilterFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilterFactory.cs
new file mode 100644
index 0000000..0229746
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanNormalizationFilterFactory.cs
@@ -0,0 +1,65 @@
+using System.Collections.Generic;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 AbstractAnalysisFactory = org.apache.lucene.analysis.util.AbstractAnalysisFactory;
+	using MultiTermAwareComponent = org.apache.lucene.analysis.util.MultiTermAwareComponent;
+	using TokenFilterFactory = org.apache.lucene.analysis.util.TokenFilterFactory;
+
+	/// <summary>
+	/// Factory for <seealso cref="GermanNormalizationFilter"/>.
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_denorm" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.StandardTokenizerFactory"/&gt;
+	///     &lt;filter class="solr.LowerCaseFilterFactory"/&gt;
+	///     &lt;filter class="solr.GermanNormalizationFilterFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre> 
+	/// </summary>
+	public class GermanNormalizationFilterFactory : TokenFilterFactory, MultiTermAwareComponent
+	{
+
+	  /// <summary>
+	  /// Creates a new GermanNormalizationFilterFactory </summary>
+	  public GermanNormalizationFilterFactory(IDictionary<string, string> args) : base(args)
+	  {
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override TokenStream create(TokenStream input)
+	  {
+		return new GermanNormalizationFilter(input);
+	  }
+
+	  public virtual AbstractAnalysisFactory MultiTermComponent
+	  {
+		  get
+		  {
+			return this;
+		  }
+	  }
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilter.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilter.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilter.cs
new file mode 100644
index 0000000..203c990
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilter.cs
@@ -0,0 +1,96 @@
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 SetKeywordMarkerFilter = org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
+	using CharTermAttribute = org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+	using KeywordAttribute = org.apache.lucene.analysis.tokenattributes.KeywordAttribute;
+
+	/// <summary>
+	/// A <seealso cref="TokenFilter"/> that stems German words. 
+	/// <para>
+	/// It supports a table of words that should
+	/// not be stemmed at all. The stemmer used can be changed at runtime after the
+	/// filter object is created (as long as it is a <seealso cref="GermanStemmer"/>).
+	/// </para>
+	/// <para>
+	/// To prevent terms from being stemmed use an instance of
+	/// <seealso cref="SetKeywordMarkerFilter"/> or a custom <seealso cref="TokenFilter"/> that sets
+	/// the <seealso cref="KeywordAttribute"/> before this <seealso cref="TokenStream"/>.
+	/// </para> </summary>
+	/// <seealso cref= SetKeywordMarkerFilter </seealso>
+	public sealed class GermanStemFilter : TokenFilter
+	{
+		/// <summary>
+		/// The actual token in the input stream.
+		/// </summary>
+		private GermanStemmer stemmer = new GermanStemmer();
+
+		private readonly CharTermAttribute termAtt = addAttribute(typeof(CharTermAttribute));
+		private readonly KeywordAttribute keywordAttr = addAttribute(typeof(KeywordAttribute));
+
+		/// <summary>
+		/// Creates a <seealso cref="GermanStemFilter"/> instance </summary>
+		/// <param name="in"> the source <seealso cref="TokenStream"/>  </param>
+		public GermanStemFilter(TokenStream @in) : base(@in)
+		{
+		}
+
+		/// <returns>  Returns true for next token in the stream, or false at EOS </returns>
+//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
+//ORIGINAL LINE: @Override public boolean incrementToken() throws java.io.IOException
+		public override bool incrementToken()
+		{
+		  if (input.incrementToken())
+		  {
+			string term = termAtt.ToString();
+
+			if (!keywordAttr.Keyword)
+			{
+			  string s = stemmer.stem(term);
+			  // If not stemmed, don't waste the time adjusting the token.
+			  if ((s != null) && !s.Equals(term))
+			  {
+				termAtt.setEmpty().append(s);
+			  }
+			}
+			return true;
+		  }
+		  else
+		  {
+			return false;
+		  }
+		}
+
+		/// <summary>
+		/// Set a alternative/custom <seealso cref="GermanStemmer"/> for this filter.
+		/// </summary>
+		public GermanStemmer Stemmer
+		{
+			set
+			{
+			  if (value != null)
+			  {
+				this.stemmer = value;
+			  }
+			}
+		}
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilterFactory.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilterFactory.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilterFactory.cs
new file mode 100644
index 0000000..4f5c136
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemFilterFactory.cs
@@ -0,0 +1,56 @@
+using System.Collections.Generic;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	/*
+	 * 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 TokenFilterFactory = org.apache.lucene.analysis.util.TokenFilterFactory;
+
+	/// <summary>
+	/// Factory for <seealso cref="GermanStemFilter"/>. 
+	/// <pre class="prettyprint">
+	/// &lt;fieldType name="text_destem" class="solr.TextField" positionIncrementGap="100"&gt;
+	///   &lt;analyzer&gt;
+	///     &lt;tokenizer class="solr.StandardTokenizerFactory"/&gt;
+	///     &lt;filter class="solr.LowerCaseFilterFactory"/&gt;
+	///     &lt;filter class="solr.GermanStemFilterFactory"/&gt;
+	///   &lt;/analyzer&gt;
+	/// &lt;/fieldType&gt;</pre>
+	/// </summary>
+	public class GermanStemFilterFactory : TokenFilterFactory
+	{
+
+	  /// <summary>
+	  /// Creates a new GermanStemFilterFactory </summary>
+	  public GermanStemFilterFactory(IDictionary<string, string> args) : base(args)
+	  {
+		if (args.Count > 0)
+		{
+		  throw new System.ArgumentException("Unknown parameters: " + args);
+		}
+	  }
+
+	  public override GermanStemFilter create(TokenStream @in)
+	  {
+		return new GermanStemFilter(@in);
+	  }
+	}
+
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemmer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemmer.cs b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemmer.cs
new file mode 100644
index 0000000..9b63922
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/De/GermanStemmer.cs
@@ -0,0 +1,308 @@
+using System.Text;
+
+namespace org.apache.lucene.analysis.de
+{
+
+	// This file is encoded in UTF-8
+
+	/*
+	 * 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.
+	 */
+
+	/// <summary>
+	/// A stemmer for German words. 
+	/// <para>
+	/// The algorithm is based on the report
+	/// "A Fast and Simple Stemming Algorithm for German Words" by J&ouml;rg
+	/// Caumanns (joerg.caumanns at isst.fhg.de).
+	/// </para>
+	/// </summary>
+	public class GermanStemmer
+	{
+		/// <summary>
+		/// Buffer for the terms while stemming them.
+		/// </summary>
+		private StringBuilder sb = new StringBuilder();
+
+		/// <summary>
+		/// Amount of characters that are removed with <tt>substitute()</tt> while stemming.
+		/// </summary>
+		private int substCount = 0;
+
+		private static readonly Locale locale = new Locale("de", "DE");
+
+		/// <summary>
+		/// Stemms the given term to an unique <tt>discriminator</tt>.
+		/// </summary>
+		/// <param name="term">  The term that should be stemmed. </param>
+		/// <returns>      Discriminator for <tt>term</tt> </returns>
+		protected internal virtual string stem(string term)
+		{
+		  // Use lowercase for medium stemming.
+		  term = term.ToLower(locale);
+		  if (!isStemmable(term))
+		  {
+			return term;
+		  }
+		  // Reset the StringBuilder.
+		  sb.Remove(0, sb.Length);
+		  sb.Insert(0, term);
+		  // Stemming starts here...
+		  substitute(sb);
+		  strip(sb);
+		  optimize(sb);
+		  resubstitute(sb);
+		  removeParticleDenotion(sb);
+		  return sb.ToString();
+		}
+
+		/// <summary>
+		/// Checks if a term could be stemmed.
+		/// </summary>
+		/// <returns>  true if, and only if, the given term consists in letters. </returns>
+		private bool isStemmable(string term)
+		{
+		  for (int c = 0; c < term.Length; c++)
+		  {
+			if (!char.IsLetter(term[c]))
+			{
+			  return false;
+			}
+		  }
+		  return true;
+		}
+
+		/// <summary>
+		/// suffix stripping (stemming) on the current term. The stripping is reduced
+		/// to the seven "base" suffixes "e", "s", "n", "t", "em", "er" and * "nd",
+		/// from which all regular suffixes are build of. The simplification causes
+		/// some overstemming, and way more irregular stems, but still provides unique.
+		/// discriminators in the most of those cases.
+		/// The algorithm is context free, except of the length restrictions.
+		/// </summary>
+		private void strip(StringBuilder buffer)
+		{
+		  bool doMore = true;
+		  while (doMore && buffer.Length > 3)
+		  {
+			if ((buffer.Length + substCount > 5) && StringHelperClass.SubstringSpecial(buffer, buffer.Length - 2, buffer.Length).Equals("nd"))
+			{
+			  buffer.Remove(buffer.Length - 2, buffer.Length - buffer.Length - 2);
+			}
+			else if ((buffer.Length + substCount > 4) && StringHelperClass.SubstringSpecial(buffer, buffer.Length - 2, buffer.Length).Equals("em"))
+			{
+				buffer.Remove(buffer.Length - 2, buffer.Length - buffer.Length - 2);
+			}
+			else if ((buffer.Length + substCount > 4) && StringHelperClass.SubstringSpecial(buffer, buffer.Length - 2, buffer.Length).Equals("er"))
+			{
+				buffer.Remove(buffer.Length - 2, buffer.Length - buffer.Length - 2);
+			}
+			else if (buffer[buffer.Length - 1] == 'e')
+			{
+			  buffer.Remove(buffer.Length - 1, 1);
+			}
+			else if (buffer[buffer.Length - 1] == 's')
+			{
+			  buffer.Remove(buffer.Length - 1, 1);
+			}
+			else if (buffer[buffer.Length - 1] == 'n')
+			{
+			  buffer.Remove(buffer.Length - 1, 1);
+			}
+			// "t" occurs only as suffix of verbs.
+			else if (buffer[buffer.Length - 1] == 't')
+			{
+			  buffer.Remove(buffer.Length - 1, 1);
+			}
+			else
+			{
+			  doMore = false;
+			}
+		  }
+		}
+
+		/// <summary>
+		/// Does some optimizations on the term. This optimisations are
+		/// contextual.
+		/// </summary>
+		private void optimize(StringBuilder buffer)
+		{
+		  // Additional step for female plurals of professions and inhabitants.
+		  if (buffer.Length > 5 && StringHelperClass.SubstringSpecial(buffer, buffer.Length - 5, buffer.Length).Equals("erin*"))
+		  {
+			buffer.Remove(buffer.Length - 1, 1);
+			strip(buffer);
+		  }
+		  // Additional step for irregular plural nouns like "Matrizen -> Matrix".
+		  // NOTE: this length constraint is probably not a great value, its just to prevent AIOOBE on empty terms
+		  if (buffer.Length > 0 && buffer[buffer.Length - 1] == ('z'))
+		  {
+			buffer[buffer.Length - 1] = 'x';
+		  }
+		}
+
+		/// <summary>
+		/// Removes a particle denotion ("ge") from a term.
+		/// </summary>
+		private void removeParticleDenotion(StringBuilder buffer)
+		{
+		  if (buffer.Length > 4)
+		  {
+			for (int c = 0; c < buffer.Length - 3; c++)
+			{
+			  if (buffer.Substring(c, 4).Equals("gege"))
+			  {
+				buffer.Remove(c, c + 2 - c);
+				return;
+			  }
+			}
+		  }
+		}
+
+		/// <summary>
+		/// Do some substitutions for the term to reduce overstemming:
+		/// 
+		/// - Substitute Umlauts with their corresponding vowel: äöü -> aou,
+		///   "ß" is substituted by "ss"
+		/// - Substitute a second char of a pair of equal characters with
+		///   an asterisk: ?? -> ?*
+		/// - Substitute some common character combinations with a token:
+		///   sch/ch/ei/ie/ig/st -> $/§/%/&/#/!
+		/// </summary>
+		private void substitute(StringBuilder buffer)
+		{
+		  substCount = 0;
+		  for (int c = 0; c < buffer.Length; c++)
+		  {
+			// Replace the second char of a pair of the equal characters with an asterisk
+			if (c > 0 && buffer[c] == buffer[c - 1])
+			{
+			  buffer[c] = '*';
+			}
+			// Substitute Umlauts.
+			else if (buffer[c] == 'ä')
+			{
+			  buffer[c] = 'a';
+			}
+			else if (buffer[c] == 'ö')
+			{
+			  buffer[c] = 'o';
+			}
+			else if (buffer[c] == 'ü')
+			{
+			  buffer[c] = 'u';
+			}
+			// Fix bug so that 'ß' at the end of a word is replaced.
+			else if (buffer[c] == 'ß')
+			{
+				buffer[c] = 's';
+				buffer.Insert(c + 1, 's');
+				substCount++;
+			}
+			// Take care that at least one character is left left side from the current one
+			if (c < buffer.Length - 1)
+			{
+			  // Masking several common character combinations with an token
+			  if ((c < buffer.Length - 2) && buffer[c] == 's' && buffer[c + 1] == 'c' && buffer[c + 2] == 'h')
+			  {
+				buffer[c] = '$';
+				buffer.Remove(c + 1, c + 3 - c + 1);
+				substCount = + 2;
+			  }
+			  else if (buffer[c] == 'c' && buffer[c + 1] == 'h')
+			  {
+				buffer[c] = '§';
+				buffer.Remove(c + 1, 1);
+				substCount++;
+			  }
+			  else if (buffer[c] == 'e' && buffer[c + 1] == 'i')
+			  {
+				buffer[c] = '%';
+				buffer.Remove(c + 1, 1);
+				substCount++;
+			  }
+			  else if (buffer[c] == 'i' && buffer[c + 1] == 'e')
+			  {
+				buffer[c] = '&';
+				buffer.Remove(c + 1, 1);
+				substCount++;
+			  }
+			  else if (buffer[c] == 'i' && buffer[c + 1] == 'g')
+			  {
+				buffer[c] = '#';
+				buffer.Remove(c + 1, 1);
+				substCount++;
+			  }
+			  else if (buffer[c] == 's' && buffer[c + 1] == 't')
+			  {
+				buffer[c] = '!';
+				buffer.Remove(c + 1, 1);
+				substCount++;
+			  }
+			}
+		  }
+		}
+
+		/// <summary>
+		/// Undoes the changes made by substitute(). That are character pairs and
+		/// character combinations. Umlauts will remain as their corresponding vowel,
+		/// as "ß" remains as "ss".
+		/// </summary>
+		private void resubstitute(StringBuilder buffer)
+		{
+		  for (int c = 0; c < buffer.Length; c++)
+		  {
+			if (buffer[c] == '*')
+			{
+			  char x = buffer[c - 1];
+			  buffer[c] = x;
+			}
+			else if (buffer[c] == '$')
+			{
+			  buffer[c] = 's';
+			  buffer.Insert(c + 1, new char[]{'c', 'h'}, 0, 2);
+			}
+			else if (buffer[c] == '§')
+			{
+			  buffer[c] = 'c';
+			  buffer.Insert(c + 1, 'h');
+			}
+			else if (buffer[c] == '%')
+			{
+			  buffer[c] = 'e';
+			  buffer.Insert(c + 1, 'i');
+			}
+			else if (buffer[c] == '&')
+			{
+			  buffer[c] = 'i';
+			  buffer.Insert(c + 1, 'e');
+			}
+			else if (buffer[c] == '#')
+			{
+			  buffer[c] = 'i';
+			  buffer.Insert(c + 1, 'g');
+			}
+			else if (buffer[c] == '!')
+			{
+			  buffer[c] = 's';
+			  buffer.Insert(c + 1, 't');
+			}
+		  }
+		}
+
+	}
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucenenet/blob/99717176/src/Lucene.Net.Analysis.Common/Analysis/El/GreekAnalyzer.cs
----------------------------------------------------------------------
diff --git a/src/Lucene.Net.Analysis.Common/Analysis/El/GreekAnalyzer.cs b/src/Lucene.Net.Analysis.Common/Analysis/El/GreekAnalyzer.cs
new file mode 100644
index 0000000..9ad4f94
--- /dev/null
+++ b/src/Lucene.Net.Analysis.Common/Analysis/El/GreekAnalyzer.cs
@@ -0,0 +1,139 @@
+using System;
+
+namespace org.apache.lucene.analysis.el
+{
+
+	/// <summary>
+	/// Copyright 2005 The Apache Software Foundation
+	/// 
+	/// Licensed 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.
+	/// </summary>
+
+
+	using StopFilter = org.apache.lucene.analysis.core.StopFilter;
+	using StandardAnalyzer = org.apache.lucene.analysis.standard.StandardAnalyzer;
+	using StandardFilter = org.apache.lucene.analysis.standard.StandardFilter;
+	using StandardTokenizer = org.apache.lucene.analysis.standard.StandardTokenizer;
+	using CharArraySet = org.apache.lucene.analysis.util.CharArraySet;
+	using StopwordAnalyzerBase = org.apache.lucene.analysis.util.StopwordAnalyzerBase;
+	using Version = org.apache.lucene.util.Version;
+
+	/// <summary>
+	/// <seealso cref="Analyzer"/> for the Greek language. 
+	/// <para>
+	/// Supports an external list of stopwords (words
+	/// that will not be indexed at all).
+	/// A default set of stopwords is used unless an alternative list is specified.
+	/// </para>
+	/// 
+	/// <a name="version"/>
+	/// <para>You must specify the required <seealso cref="Version"/>
+	/// compatibility when creating GreekAnalyzer:
+	/// <ul>
+	///   <li> As of 3.1, StandardFilter and GreekStemmer are used by default.
+	///   <li> As of 2.9, StopFilter preserves position
+	///        increments
+	/// </ul>
+	/// 
+	/// </para>
+	/// <para><b>NOTE</b>: This class uses the same <seealso cref="Version"/>
+	/// dependent settings as <seealso cref="StandardAnalyzer"/>.</para>
+	/// </summary>
+	public sealed class GreekAnalyzer : StopwordAnalyzerBase
+	{
+	  /// <summary>
+	  /// File containing default Greek stopwords. </summary>
+	  public const string DEFAULT_STOPWORD_FILE = "stopwords.txt";
+
+	  /// <summary>
+	  /// Returns a set of default Greek-stopwords </summary>
+	  /// <returns> a set of default Greek-stopwords  </returns>
+	  public static CharArraySet DefaultStopSet
+	  {
+		  get
+		  {
+			return DefaultSetHolder.DEFAULT_SET;
+		  }
+	  }
+
+	  private class DefaultSetHolder
+	  {
+		internal static readonly CharArraySet DEFAULT_SET;
+
+		static DefaultSetHolder()
+		{
+		  try
+		  {
+			DEFAULT_SET = loadStopwordSet(false, typeof(GreekAnalyzer), DEFAULT_STOPWORD_FILE, "#");
+		  }
+		  catch (IOException)
+		  {
+			// default set should always be present as it is part of the
+			// distribution (JAR)
+			throw new Exception("Unable to load default stopword set");
+		  }
+		}
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the default stop words. </summary>
+	  /// <param name="matchVersion"> Lucene compatibility version,
+	  ///   See <a href="#version">above</a> </param>
+	  public GreekAnalyzer(Version matchVersion) : this(matchVersion, DefaultSetHolder.DEFAULT_SET)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Builds an analyzer with the given stop words. 
+	  /// <para>
+	  /// <b>NOTE:</b> The stopwords set should be pre-processed with the logic of 
+	  /// <seealso cref="GreekLowerCaseFilter"/> for best results.
+	  ///  
+	  /// </para>
+	  /// </summary>
+	  /// <param name="matchVersion"> Lucene compatibility version,
+	  ///   See <a href="#version">above</a> </param>
+	  /// <param name="stopwords"> a stopword set </param>
+	  public GreekAnalyzer(Version matchVersion, CharArraySet stopwords) : base(matchVersion, stopwords)
+	  {
+	  }
+
+	  /// <summary>
+	  /// Creates
+	  /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  /// used to tokenize all the text in the provided <seealso cref="Reader"/>.
+	  /// </summary>
+	  /// <returns> <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
+	  ///         built from a <seealso cref="StandardTokenizer"/> filtered with
+	  ///         <seealso cref="GreekLowerCaseFilter"/>, <seealso cref="StandardFilter"/>,
+	  ///         <seealso cref="StopFilter"/>, and <seealso cref="GreekStemFilter"/> </returns>
+	  protected internal override TokenStreamComponents createComponents(string fieldName, Reader reader)
+	  {
+//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
+//ORIGINAL LINE: final org.apache.lucene.analysis.Tokenizer source = new org.apache.lucene.analysis.standard.StandardTokenizer(matchVersion, reader);
+		Tokenizer source = new StandardTokenizer(matchVersion, reader);
+		TokenStream result = new GreekLowerCaseFilter(matchVersion, source);
+		if (matchVersion.onOrAfter(Version.LUCENE_31))
+		{
+		  result = new StandardFilter(matchVersion, result);
+		}
+		result = new StopFilter(matchVersion, result, stopwords);
+		if (matchVersion.onOrAfter(Version.LUCENE_31))
+		{
+		  result = new GreekStemFilter(result);
+		}
+		return new TokenStreamComponents(source, result);
+	  }
+	}
+
+}
\ No newline at end of file