Examples of TokenFilter

edu.ucla.sspace.text.TokenFilter
A utility for asserting what tokens are valid and invalid within a stream of tokens. A filter may be either inclusive or exclusive.
An inclusive filter will accept only those tokens with which it was initialized. For an example, an inclusive filter initialized with all of the words in the english dictionary would exclude all misspellings or foreign words in a token stream.
An exclusive filter will aceept only those tokens that are not in set with which it was initialized. An exclusive filter is often used with a list of common words that should be excluded, which is also known as a "stop list."
{@code TokenFilter} instances may be combined into a linear chain of filters.This allows for a highly configurable filter to be made from mulitple rules. Chained filters are created in a linear order and each filter must accept the token for the last filter to return {@code}. If the any of the earlier filters return {@code false}, then the token is not accepted.
This class also provides a static utility function {@link #loadFromSpecification(String) loadFromSpecification} for initializing achain of filters from a text configuration. This is intended to facility command-line tools that want to provide easily configurable filters. An example configuration might look like: include=top-tokens.txt:test-words.txt,exclude=stop-words.txt @see FilteredIterator
org.apache.lucene.analysis.TokenFilter
A TokenFilter is a TokenStream whose input is another token stream.
This is an abstract class. NOTE: subclasses must override {@link #incrementToken()} if the new TokenStream API is usedand {@link #next(Token)} or {@link #next()} if the oldTokenStream API is used.
See {@link TokenStream}
org.apache.tools.ant.filters.TokenFilter
This splits up input into tokens and passes the tokens to a sequence of filters. @author Peter Reilly @since Ant 1.6 @see BaseFilterReader @see ChainableReader @see DynamicConfigurator
org.apache.uima.conceptMapper.support.tokens.TokenFilter

Examples of edu.ucla.sspace.text.TokenFilter

     * with optional configuration file, if it is not {@code null}, and any
     * {@link TokenFilter}s or {@link Stemmer}s that have been specified by the
     * command line.
     */
    protected void setupDependencyExtractor() {
        TokenFilter filter = (argOptions.hasOption("tokenFilter"))
            ? TokenFilter.loadFromSpecification(argOptions.getStringOption('F'))
            : null;


        Stemmer stemmer = argOptions.getObjectOption("stemmingAlgorithm", null);
        String format = argOptions.getStringOption(

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Examples of edu.ucla.sspace.text.TokenFilter

        // Extract key arguments.
        boolean doLowerCasing = options.hasOption("lowerCase");
        boolean doPos = options.hasOption("partOfSpeech");
        boolean discardHeader = options.hasOption('H');


        TokenFilter filter = (options.hasOption("tokenFilter"))
            ? TokenFilter.loadFromSpecification(options.getStringOption('F'))
            : null;


        Stemmer stemmer = options.getObjectOption("stemmingAlgorithm", null);

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Examples of edu.ucla.sspace.text.TokenFilter


        // Setup logging.
        if (options.hasOption("verbose")) 
            LoggerUtil.setLevel(Level.FINE);


        TokenFilter filter = (options.hasOption("tokenFilter"))
            ? TokenFilter.loadFromSpecification(options.getStringOption('F'))
            : null;


        // setup the dependency extractor.
        DependencyExtractor e = new CoNLLDependencyExtractor(filter, null);

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Examples of edu.ucla.sspace.text.TokenFilter


        // Setup logging.
        if (options.hasOption("verbose")) 
            LoggerUtil.setLevel(Level.FINE);


        TokenFilter filter = (options.hasOption("tokenFilter"))
            ? TokenFilter.loadFromSpecification(options.getStringOption('F'))
            : null;


        // setup the dependency extractor.
        DependencyExtractor e = new CoNLLDependencyExtractor(filter, null);

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Examples of org.apache.lucene.analysis.TokenFilter


  public void testTokenReuse() throws IOException {
    Analyzer analyzer = new Analyzer() {
      @Override
      public TokenStream tokenStream(String fieldName, Reader reader) {
        return new TokenFilter(new WhitespaceTokenizer(TEST_VERSION_CURRENT, reader)) {
          boolean first=true;
          AttributeSource.State state;


          @Override
          public boolean incrementToken() throws IOException {

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Examples of org.apache.lucene.analysis.TokenFilter

      throw new IllegalArgumentException("logStream must not be null");


    return new Analyzer() {
      @Override
      public TokenStream tokenStream(final String fieldName, Reader reader) {
        return new TokenFilter(child.tokenStream(fieldName, reader)) {
          private int position = -1;
          private TermAttribute termAtt = addAttribute(TermAttribute.class);
          private PositionIncrementAttribute posIncrAtt = addAttribute(PositionIncrementAttribute.class);
          private OffsetAttribute offsetAtt = addAttribute(OffsetAttribute.class);
          private TypeAttribute typeAtt = addAttribute(TypeAttribute.class);

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Examples of org.apache.lucene.analysis.TokenFilter

      return child; // no need to wrap
  
    return new Analyzer() {
      @Override
      public TokenStream tokenStream(String fieldName, Reader reader) {
        return new TokenFilter(child.tokenStream(fieldName, reader)) {
          private int todo = maxTokens;
          
          @Override
          public boolean incrementToken() throws IOException {
            return --todo >= 0 ? input.incrementToken() : false;

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Examples of org.apache.lucene.analysis.TokenFilter

      @Override
      public TokenStream tokenStream(String fieldName, Reader reader) {
        final ArrayList<AttributeSource.State> tokens = cache.get(fieldName);
        if (tokens == null) { // not yet cached
          final ArrayList<AttributeSource.State> tokens2 = new ArrayList<AttributeSource.State>();
          TokenStream tokenStream = new TokenFilter(child.tokenStream(fieldName, reader)) {


            @Override
            public boolean incrementToken() throws IOException {
              boolean hasNext = input.incrementToken();
              if (hasNext) tokens2.add(captureState());

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Examples of org.apache.lucene.analysis.TokenFilter


  public void testTokenReuse() throws IOException {
    Analyzer analyzer = new Analyzer() {
      @Override
      public TokenStream tokenStream(String fieldName, Reader reader) {
        return new TokenFilter(new WhitespaceTokenizer(reader)) {
          boolean first=true;
          AttributeSource.State state;


          @Override
          public boolean incrementToken() throws IOException {

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Examples of org.apache.lucene.analysis.TokenFilter


  public void testElision() throws Exception {
    String test = "Plop, juste pour voir l'embrouille avec O'brian. M'enfin.";
    Tokenizer tokenizer = new StandardTokenizer(TEST_VERSION_CURRENT, new StringReader(test));
    CharArraySet articles = new CharArraySet(TEST_VERSION_CURRENT, asSet("l", "M"), false);
    TokenFilter filter = new ElisionFilter(tokenizer, articles);
    List<String> tas = filter(filter);
    assertEquals("embrouille", tas.get(4));
    assertEquals("O'brian", tas.get(6));
    assertEquals("enfin", tas.get(7));
  }

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