public override TokenStream TokenStream(string fieldName, TextReader reader)
{
var tokenizer = new StandardTokenizer(Version.LUCENE_30, reader);
var shingleMatrix = new ShingleMatrixFilter(tokenizer, 2, 8, ' ');
var lowerCaseFilter = new LowerCaseFilter(shingleMatrix);
return new StopFilter(true, lowerCaseFilter, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
// This should be a good tokenizer for most European-language documents:
// Splits words at punctuation characters, removing punctuation.
// Splits words at hyphens, unless there's a number in the token...
// Recognizes email addresses and internet hostnames as one token.
var intput = new StandardTokenizer(Version.LUCENE_30, reader);
// A ShingleMatrixFilter constructs shingles from a token stream.
// "2010 Audi RS5 Quattro Coupe" => "2010 Audi", "Audi RS5", "RS5 Quattro", "Quattro Coupe"
var shingleMatrixOutput = new ShingleMatrixFilter(
// stream from which to construct the matrix
intput,
// minimum number of tokens in any shingle
2,
// maximum number of tokens in any shingle.
8,
// character to use between texts of the token parts in a shingle.
' ');
// Normalizes token text to lower case.
var lowerCaseFilter = new LowerCaseFilter(shingleMatrixOutput);
// Removes stop words from a token stream.
return new StopFilter(true, lowerCaseFilter, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
}
/*
public override TokenStream ReusableTokenStream(string fieldName, System.IO.TextReader reader)
{
MMSegTokenizer mmsegTokenizer = (MMSegTokenizer)base.PreviousTokenStream;
if (mmsegTokenizer == null)
{
mmsegTokenizer = new MMSegTokenizer(NewSeg, reader);
base.PreviousTokenStream = mmsegTokenizer;
}
else
{
mmsegTokenizer.Reset(reader);
}
return mmsegTokenizer;
}
*/
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
Lucene.Net.Analysis.TokenStream result = new MMSegTokenizer(NewSeg, reader);
result.Reset();
result = new LowerCaseFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream result = whitespaceAnalyzer.TokenStream(fieldName, reader);
result = new LowerCaseFilter(result);
result = new StopFilter(true, result, stopWords);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream result = new StandardTokenizer(reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
result = new RuSnowballFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream result =
new LowerCaseFilter(
new StandardTokenizer(_version, reader));
return result;
}
/// <summary>Constructs a {@link StandardTokenizer} filtered by a {@link
/// StandardFilter}, a {@link LowerCaseFilter} and a {@link StopFilter}.
/// </summary>
public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
{
TokenStream result = new StandardTokenizer(reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
result = new StopFilter(result, stopSet);
return result;
}
public override TokenStream TokenStream(string fieldname, TextReader reader)
{
TokenStream result = new PersianTokenizer(reader);
result = new LowerCaseFilter(result);
result = new PersianNormalizationFilter(result);
result = new StopFilter(StopFilter.GetEnablePositionIncrementsVersionDefault(_version), result, _stoptable);
result = new PersianLemmatizationFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
var seg = new JiebaSegmenter();
TokenStream result = new JiebaTokenizer(seg, reader);
// This filter is necessary, because the parser converts the queries to lower case.
result = new LowerCaseFilter(result);
result = new StopFilter(true, result, StopWords);
return result;
}
public override TokenStream TokenStream(String fieldName, TextReader reader)
{
Tokenizer source = new StandardTokenizer(matchVersion, reader);
TokenStream sink = new StandardFilter(source);
sink = new LowerCaseFilter(sink);
//sink = new StopFilter(StopFilter.GetEnablePositionIncrementsVersionDefault(matchVersion), sink, stopSet);
sink = new CroatianStemFilter(sink, stemmer);
return sink;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
// Split the title based on IdSeparators, then run it through the innerAnalyzer
string title = reader.ReadToEnd();
string partiallyTokenized = String.Join(" ", title.Split(PackageIndexEntity.IdSeparators, StringSplitOptions.RemoveEmptyEntries));
TokenStream result = whitespaceAnalyzer.TokenStream(fieldName, new StringReader(partiallyTokenized));
result = new LowerCaseFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
var tokenizer = new StandardTokenizer(Version.LUCENE_29, reader);
tokenizer.MaxTokenLength = 255;
TokenStream filter = new StandardFilter(tokenizer);
filter = new LowerCaseFilter(filter);
filter = new StopFilter(false, filter, StandardAnalyzer.STOP_WORDS_SET);
return new NGramTokenFilter(filter, 2, 6);
}
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
var seg = new JiebaSegmenter();
TokenStream result = new JiebaTokenizer(seg, reader);
result = new LowerCaseFilter(result);
result = new StopFilter(true, result, StopWords);
return result;
}
/** Constructs a {@link StandardTokenizer} filtered by a {@link
* StandardFilter}, a {@link LowerCaseFilter}, a {@link StopFilter}
* and a {@link SpanishStemFilter}. */
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream result = new StandardTokenizer(Version.LUCENE_24,reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
result = new StopFilter(true,result, stopTable);
result = new SpanishStemFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream result = new StandardTokenizer(matchVersion, reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
result = new StopFilter(this.enableStopPositionIncrements, result, stoptable);
result = new BulgarianStemFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
//Need to account for the | breaks in relatedcontent
var tokenizedInput = new LowerCaseFilter(new StandardFilter(new StandardTokenizer(_version, reader)));
//return new ShingleFilter(tokenizedInput, 4);
var output = new ShingleFilter(tokenizedInput, 4);
//output.SetOutputUnigrams(false);
return output;
}
/// <summary>
/// </summary>
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
TokenStream t = null;
t = new LetterOrDigitTokenizer(reader);
t = new LowerCaseFilter(t);
t = new ASCIIFoldingFilter(t);
t = new SingleCharTokenizer(t);
return t;
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
var tokenizer = new StandardTokenizer(Version.LUCENE_30, reader);
tokenizer.MaxTokenLength = 255;
TokenStream filter = new StandardFilter(tokenizer);
filter = new LowerCaseFilter(filter);
filter = new NGramTokenFilter(filter, 2, 255);
return filter;
}
/// <summary>Constructs a <see cref="StandardTokenizer"/> filtered by a {@link
/// StandardFilter}, a <see cref="LowerCaseFilter"/> and a <see cref="StopFilter"/>.
/// </summary>
public override TokenStream TokenStream(System.String fieldName, System.IO.TextReader reader)
{
TokenStream result = new StandardTokenizer(matchVersion, reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
if (stopSet != null)
result = new StopFilter(StopFilter.GetEnablePositionIncrementsVersionDefault(matchVersion),
result, stopSet);
result = new SnowballFilter(result, name);
return result;
}
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
TokenStream result = new StandardTokenizer(kLuceneVersion, reader);
result = new StandardFilter(result);
result = new LowerCaseFilter(result);
result = new ASCIIFoldingFilter(result);
result = new StopFilter(false, result, StopFilter.MakeStopSet(kEnglishStopWords));
result = new EdgeNGramTokenFilter(
result, Lucene.Net.Analysis.NGram.EdgeNGramTokenFilter.Side.FRONT, 1, 20);
return result;
}
public override TokenStream TokenStream(string fieldName, TextReader reader) {
TokenStream result = new StandardTokenizer(this._luceneVersion, reader);
result = new StandardFilter(result);
result = new StopFilter(StopFilter.GetEnablePositionIncrementsVersionDefault(this._luceneVersion),
result,
CharArraySet.UnmodifiableSet(new CharArraySet((IEnumerable<string>)FRENCH_STOP_WORDS, false))
);
result = new FrenchStemFilter(result, CharArraySet.EMPTY_SET);
// Convert to lowercase after stemming!
result = new LowerCaseFilter(result);
result = new ASCIIFoldingFilter(result);
return result;
}
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
TokenStream result = new StandardTokenizer(Lucene.Net.Util.Version.LUCENE_29, reader);
//result = new StandardFilter(result);
result = new LowerCaseFilter(result);
if (STOP_WORDS != null)
result = new StopFilter(false, result, STOP_WORDS);
result = new ASCIIFoldingFilter(result);
result = new SnowballFilter(result, "English");
return result;
}
/// <summary>
///
/// </summary>
/// <remarks></remarks>
/// <seealso cref=""/>
/// <param name="fieldName"></param>
/// <param name="reader"></param>
/// <returns></returns>
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
//create the tokenizer
TokenStream result = new StandardTokenizer(Lucene.Net.Util.Version.LUCENE_30, reader);
//add in filters
result = new StandardFilter(result); // first normalize the StandardTokenizer
result = new LowerCaseFilter(result);// makes sure everything is lower case
result = new StopFilter(true, result, StopAnalyzer.ENGLISH_STOP_WORDS_SET); // use the default list of Stop Words, provided by the StopAnalyzer class.
result = new SynonymFilter(result, SynonymEngine); // injects the synonyms.
//return the built token stream.
return result;
}
public override TokenStream TokenStream(string fieldName, System.IO.TextReader reader)
{
TokenStream result = new StandardTokenizer(Lucene.Net.Util.Version.LUCENE_29, reader);
//result = new StandardFilter(result);
result = new LowerCaseFilter(result);
if (STOP_WORDS != null)
result = new StopFilter(false, result, STOP_WORDS);
result = new ASCIIFoldingFilter(result);
// we are using a distinct version of the Spanish stemmer, called Spanish2
// Please check if this class can be found in the Snowball library, the relative path
// should be: Snowball\SF\Snowball\Ext\
// just in case, I would leave a copy of this class in this project
result = new SnowballFilter(result, "Spanish");
return result;
}
public virtual void TestOverridesAny()
{
try
{
TokenStream stream = new WhitespaceTokenizer(new System.IO.StringReader(doc));
stream = new AnonymousClassTokenFilter(this, stream);
stream = new LowerCaseFilter(stream);
stream = new StopFilter(stream, stopwords);
while (stream.IncrementToken())
{
;
}
Assert.Fail("One TokenFilter does not override any of the required methods, so it should fail.");
}
catch (System.NotSupportedException uoe)
{
Assert.IsTrue(uoe.Message.EndsWith("does not implement any of incrementToken(), next(Token), next()."));
}
}
public override TokenStream TokenStream(string fieldName, TextReader reader)
{
Tokenizer src = new StandardTokenizer(Version.LUCENE_30, reader);
TokenStream filter = new StandardFilter(src);
//var stoplist = StopAnalyzer.ENGLISH_STOP_WORDS_SET;
HashSet<string> newWords = new HashSet<string>()
{
"said", "have", "the", "more", "from", "who", "he", "than", "it", "were", "use", "has", "also",
"been", "we", "which", "had", "you", "us", "them", "so", "in", "i", "our", "his", "to", "of", "a",
"st", "ad", "co", "re", "ve", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "f", "g", "it"
};
foreach (var var in StopAnalyzer.ENGLISH_STOP_WORDS_SET)
{
newWords.Add(var);
}
TokenStream result = new StandardTokenizer(Version.LUCENE_30, reader);
result = new SnowballFilter(result, new EnglishStemmer());
result = new LowerCaseFilter(result);
result = new ASCIIFoldingFilter(result);
result = new StopFilter(true, result, newWords);
return result;
}
private void TestCachingCustomToken(int api)
{
TokenStream stream = new WhitespaceTokenizer(new System.IO.StringReader(doc));
stream = new PartOfSpeechTaggingFilter(stream);
stream = new LowerCaseFilter(stream);
stream = new StopFilter(stream, stopwords);
stream = new CachingTokenFilter(stream); // <- the caching is done before the annotating!
stream = new PartOfSpeechAnnotatingFilter(stream);
switch (api)
{
case 0:
ConsumeStreamNewAPI(stream);
ConsumeStreamNewAPI(stream);
break;
case 1:
ConsumeStreamOldAPI(stream);
ConsumeStreamOldAPI(stream);
break;
case 2:
ConsumeStreamVeryOldAPI(stream);
ConsumeStreamVeryOldAPI(stream);
break;
case 3:
ConsumeStreamNewAPI(stream);
ConsumeStreamOldAPI(stream);
ConsumeStreamVeryOldAPI(stream);
ConsumeStreamNewAPI(stream);
ConsumeStreamVeryOldAPI(stream);
break;
}
}
public virtual void TestOnlyNewAPI()
{
TokenStream.SetOnlyUseNewAPI(true);
try
{
// this should fail with UOE
try
{
TokenStream stream = new WhitespaceTokenizer(new System.IO.StringReader(doc));
stream = new PartOfSpeechTaggingFilter(stream); // <-- this one is evil!
stream = new LowerCaseFilter(stream);
stream = new StopFilter(stream, stopwords);
while (stream.IncrementToken())
{
;
}
Assert.Fail("If only the new API is allowed, this should fail with an UOE");
}
catch (System.NotSupportedException uoe)
{
Assert.IsTrue((typeof(PartOfSpeechTaggingFilter).FullName + " does not implement incrementToken() which is needed for onlyUseNewAPI.").Equals(uoe.Message));
}
// this should pass, as all core token streams support the new API
TokenStream stream2 = new WhitespaceTokenizer(new System.IO.StringReader(doc));
stream2 = new LowerCaseFilter(stream2);
stream2 = new StopFilter(stream2, stopwords);
while (stream2.IncrementToken())
{
;
}
// Test, if all attributes are implemented by their implementation, not Token/TokenWrapper
Assert.IsTrue(stream2.AddAttribute(typeof(TermAttribute)) is TermAttributeImpl, "TermAttribute is implemented by TermAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(OffsetAttribute)) is OffsetAttributeImpl, "OffsetAttribute is implemented by OffsetAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(Lucene.Net.Analysis.Tokenattributes.FlagsAttribute)) is FlagsAttributeImpl, "FlagsAttribute is implemented by FlagsAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(PayloadAttribute)) is PayloadAttributeImpl, "PayloadAttribute is implemented by PayloadAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(PositionIncrementAttribute)) is PositionIncrementAttributeImpl, "PositionIncrementAttribute is implemented by PositionIncrementAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(TypeAttribute)) is TypeAttributeImpl, "TypeAttribute is implemented by TypeAttributeImpl");
Assert.IsTrue(stream2.AddAttribute(typeof(SenselessAttribute)) is SenselessAttributeImpl, "SenselessAttribute is not implemented by SenselessAttributeImpl");
// try to call old API, this should fail
try
{
stream2.Reset();
Token reusableToken = new Token();
while ((reusableToken = stream2.Next(reusableToken)) != null)
{
;
}
Assert.Fail("If only the new API is allowed, this should fail with an UOE");
}
catch (System.NotSupportedException uoe)
{
Assert.IsTrue("This TokenStream only supports the new Attributes API.".Equals(uoe.Message));
}
try
{
stream2.Reset();
while (stream2.Next() != null)
{
;
}
Assert.Fail("If only the new API is allowed, this should fail with an UOE");
}
catch (System.NotSupportedException uoe)
{
Assert.IsTrue("This TokenStream only supports the new Attributes API.".Equals(uoe.Message));
}
// Test if the wrapper API (onlyUseNewAPI==false) uses TokenWrapper
// as attribute instance.
// TokenWrapper encapsulates a Token instance that can be exchanged
// by another Token instance without changing the AttributeImpl instance
// itsself.
TokenStream.SetOnlyUseNewAPI(false);
stream2 = new WhitespaceTokenizer(new System.IO.StringReader(doc));
Assert.IsTrue(stream2.AddAttribute(typeof(TermAttribute)) is TokenWrapper, "TermAttribute is implemented by TokenWrapper");
Assert.IsTrue(stream2.AddAttribute(typeof(OffsetAttribute)) is TokenWrapper, "OffsetAttribute is implemented by TokenWrapper");
Assert.IsTrue(stream2.AddAttribute(typeof(Lucene.Net.Analysis.Tokenattributes.FlagsAttribute)) is TokenWrapper, "FlagsAttribute is implemented by TokenWrapper");
Assert.IsTrue(stream2.AddAttribute(typeof(PayloadAttribute)) is TokenWrapper, "PayloadAttribute is implemented by TokenWrapper");
Assert.IsTrue(stream2.AddAttribute(typeof(PositionIncrementAttribute)) is TokenWrapper, "PositionIncrementAttribute is implemented by TokenWrapper");
Assert.IsTrue(stream2.AddAttribute(typeof(TypeAttribute)) is TokenWrapper, "TypeAttribute is implemented by TokenWrapper");
// This one is not implemented by TokenWrapper:
Assert.IsTrue(stream2.AddAttribute(typeof(SenselessAttribute)) is SenselessAttributeImpl, "SenselessAttribute is not implemented by SenselessAttributeImpl");
}
finally
{
TokenStream.SetOnlyUseNewAPI(false);
}
}
public override TokenStream TokenStream(string fieldName, TextReader reader) {
TokenStream result = new PanGuTokenizer(reader);
result = new LowerCaseFilter(result);
return result;
}
public virtual void TestMultipleSources()
{
SinkTokenizer theDetector = new AnonymousClassSinkTokenizer1(this, null);
SinkTokenizer dogDetector = new AnonymousClassSinkTokenizer2(this, null);
TokenStream source1 = new CachingTokenFilter(new TeeTokenFilter(new TeeTokenFilter(new WhitespaceTokenizer(new System.IO.StringReader(buffer1.ToString())), theDetector), dogDetector));
TokenStream source2 = new TeeTokenFilter(new TeeTokenFilter(new WhitespaceTokenizer(new System.IO.StringReader(buffer2.ToString())), theDetector), dogDetector);
int i = 0;
Token reusableToken = new Token();
for (Token nextToken = source1.Next(reusableToken); nextToken != null; nextToken = source1.Next(reusableToken))
{
Assert.IsTrue(nextToken.Term().Equals(tokens1[i]) == true, nextToken.Term() + " is not equal to " + tokens1[i]);
i++;
}
Assert.IsTrue(i == tokens1.Length, i + " does not equal: " + tokens1.Length);
Assert.IsTrue(theDetector.GetTokens().Count == 2, "theDetector Size: " + theDetector.GetTokens().Count + " is not: " + 2);
Assert.IsTrue(dogDetector.GetTokens().Count == 1, "dogDetector Size: " + dogDetector.GetTokens().Count + " is not: " + 1);
i = 0;
for (Token nextToken = source2.Next(reusableToken); nextToken != null; nextToken = source2.Next(reusableToken))
{
Assert.IsTrue(nextToken.Term().Equals(tokens2[i]) == true, nextToken.Term() + " is not equal to " + tokens2[i]);
i++;
}
Assert.IsTrue(i == tokens2.Length, i + " does not equal: " + tokens2.Length);
Assert.IsTrue(theDetector.GetTokens().Count == 4, "theDetector Size: " + theDetector.GetTokens().Count + " is not: " + 4);
Assert.IsTrue(dogDetector.GetTokens().Count == 2, "dogDetector Size: " + dogDetector.GetTokens().Count + " is not: " + 2);
i = 0;
for (Token nextToken = theDetector.Next(reusableToken); nextToken != null; nextToken = theDetector.Next(reusableToken))
{
Assert.IsTrue(nextToken.Term().ToUpper().Equals("The".ToUpper()) == true, nextToken.Term() + " is not equal to " + "The");
i++;
}
Assert.IsTrue(i == theDetector.GetTokens().Count, i + " does not equal: " + theDetector.GetTokens().Count);
i = 0;
for (Token nextToken = dogDetector.Next(reusableToken); nextToken != null; nextToken = dogDetector.Next(reusableToken))
{
Assert.IsTrue(nextToken.Term().ToUpper().Equals("Dogs".ToUpper()) == true, nextToken.Term() + " is not equal to " + "Dogs");
i++;
}
Assert.IsTrue(i == dogDetector.GetTokens().Count, i + " does not equal: " + dogDetector.GetTokens().Count);
source1.Reset();
TokenStream lowerCasing = new LowerCaseFilter(source1);
i = 0;
for (Token nextToken = lowerCasing.Next(reusableToken); nextToken != null; nextToken = lowerCasing.Next(reusableToken))
{
Assert.IsTrue(nextToken.Term().Equals(tokens1[i].ToLower()) == true, nextToken.Term() + " is not equal to " + tokens1[i].ToLower());
i++;
}
Assert.IsTrue(i == tokens1.Length, i + " does not equal: " + tokens1.Length);
}
/*
* Creates a {@link TokenStream} which tokenizes all the text in the
* provided {@link Reader}.
*
* @return A {@link TokenStream} built from a
* {@link RussianLetterTokenizer} filtered with
* {@link RussianLowerCaseFilter}, {@link StopFilter},
* and {@link RussianStemFilter}
*/
public override TokenStream TokenStream(String fieldName, TextReader reader)
{
TokenStream result = new RussianLetterTokenizer(reader);
result = new LowerCaseFilter(result);
result = new StopFilter(StopFilter.GetEnablePositionIncrementsVersionDefault(matchVersion),
result, stopSet);
result = new RussianStemFilter(result);
return result;
}
/*
* Creates a {@link TokenStream} which tokenizes all the text in the provided {@link Reader}.
*
* @return A {@link TokenStream} built from a {@link StandardTokenizer} filtered with
* {@link StandardFilter}, {@link LowerCaseFilter}, and {@link StopFilter}
*/
public override sealed TokenStream TokenStream( String fieldName, TextReader reader ) {
TokenStream result = new StandardTokenizer( matchVersion, reader );
result = new StandardFilter( result );
result = new LowerCaseFilter( result );
result = new StopFilter( StopFilter.GetEnablePositionIncrementsVersionDefault(matchVersion),
result, stoptable );
return result;
}
public virtual void TestOverridesAny()
{
try
{
TokenStream stream = new WhitespaceTokenizer(new System.IO.StringReader(doc));
stream = new AnonymousClassTokenFilter(this, stream);
stream = new LowerCaseFilter(stream);
stream = new StopFilter(stream, stopwords);
while (stream.IncrementToken())
;
Assert.Fail("One TokenFilter does not override any of the required methods, so it should fail.");
}
catch (System.NotSupportedException uoe)
{
Assert.IsTrue(uoe.Message.EndsWith("does not implement any of incrementToken(), next(Token), next()."));
}
}
