Examples of org.apache.lucene.analysis.LowerCaseTokenizer

org.apache.lucene.analysis.LowerCaseTokenizer
LowerCaseTokenizer performs the function of LetterTokenizer and LowerCaseFilter together. It divides text at non-letters and converts them to lower case. While it is functionally equivalent to the combination of LetterTokenizer and LowerCaseFilter, there is a performance advantage to doing the two tasks at once, hence this (redundant) implementation.
Note: this does a decent job for most European languages, but does a terrible job for some Asian languages, where words are not separated by spaces.

    checkOneTermReuse(a, "Tische", "tisch");
    checkOneTermReuse(a, "Tischen", "tisch");
  }
  
  public void testExclusionTableBWCompat() throws IOException {
    GermanStemFilter filter = new GermanStemFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, 
        new StringReader("Fischen Trinken")));
    CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set.add("fischen");
    filter.setExclusionSet(set);
    assertTokenStreamContents(filter, new String[] { "fischen", "trink" });

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  public void testWithKeywordAttribute() throws IOException {
    CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set.add("fischen");
    GermanStemFilter filter = new GermanStemFilter(
        new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader( 
            "Fischen Trinken")), set));
    assertTokenStreamContents(filter, new String[] { "fischen", "trink" });
  }

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    set.add("fischen");
    CharArraySet set1 = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set1.add("trinken");
    set1.add("fischen");
    GermanStemFilter filter = new GermanStemFilter(
        new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader(
            "Fischen Trinken")), set));
    filter.setExclusionSet(set1);
    assertTokenStreamContents(filter, new String[] { "fischen", "trinken" });
  }

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   * @see org.apache.lucene.analysis.Analyzer#tokenStream(java.lang.String,
   *      java.io.Reader)
   */
  @Override
  public TokenStream tokenStream(String arg0, Reader arg1) {
    LowerCaseTokenizer stream = new LowerCaseTokenizer(LuceneTestCase.TEST_VERSION_CURRENT, arg1);
    stream.addAttribute(CharTermAttribute.class);
    stream.addAttribute(PositionIncrementAttribute.class);
    stream.addAttribute(OffsetAttribute.class);
    try {
      stream.reset();
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
    return new SynonymTokenizer(stream, synonyms);
  }

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  public static final class QPTestAnalyzer extends Analyzer {


    /** Filters LowerCaseTokenizer with StopFilter. */
    @Override
    public final TokenStream tokenStream(String fieldName, Reader reader) {
      return new QPTestFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, reader));
    }

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final class TestPayloadAnalyzer extends Analyzer {


  @Override
  public TokenStream tokenStream(String fieldName, Reader reader) {
    TokenStream result = new LowerCaseTokenizer(LuceneTestCase.TEST_VERSION_CURRENT, reader);
    return new PayloadFilter(result, fieldName);
  }

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  public static final class QPTestAnalyzer extends Analyzer {


    /** Filters LowerCaseTokenizer with StopFilter. */
    @Override
    public final TokenStream tokenStream(String fieldName, Reader reader) {
      return new QPTestFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, reader));
    }

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  public void testStemExclusionTableBWCompat() throws IOException {
    CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set.add("Brasília");
    BrazilianStemFilter filter = new BrazilianStemFilter(
        new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader("Brasília Brasilia")), set);
    assertTokenStreamContents(filter, new String[] { "brasília", "brasil" });
  }

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  public void testWithKeywordAttribute() throws IOException {
    CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set.add("Brasília");
    BrazilianStemFilter filter = new BrazilianStemFilter(
        new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader(
            "Brasília Brasilia")), set));
    assertTokenStreamContents(filter, new String[] { "brasília", "brasil" });
  }

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    CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set.add("Brasília");
    CharArraySet set1 = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
    set1.add("Brasilia");
    BrazilianStemFilter filter = new BrazilianStemFilter(
        new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader(
            "Brasília Brasilia")), set), set1);
    assertTokenStreamContents(filter, new String[] { "brasília", "brasilia" });
  }

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