Example usage for org.apache.lucene.analysis.ja JapaneseKatakanaStemFilter JapaneseKatakanaStemFilter

Introduction

In this page you can find the example usage for org.apache.lucene.analysis.ja JapaneseKatakanaStemFilter JapaneseKatakanaStemFilter.

Prototype

public JapaneseKatakanaStemFilter(TokenStream input) 

Source Link

Usage

From source file:modnlp.idx.inverted.TokeniserJPLucene.java

License:Open Source License

public void tokenise() throws IOException {
    String ignregexp = "--+|\\.\\.+|\\.+\\p{Space}"; // delete full stops and dashes (typically not used).
    if (ignoredElements != null && ignoredElements.length() > 0)
        ignregexp = ignregexp + "|< *" + ignoredElements + "[^>]*?/>" + "|< *" + ignoredElements + ".*?>.*?</"
                + ignoredElements + " *>";
    if (!tagIndexing)
        ignregexp = ignregexp + "|<.*?>";
    //ignregexp = ignregexp+"|\\W\\W+";

    Pattern p = Pattern.compile(ignregexp);
    Matcher igns = p.matcher(originalText);

    StringBuffer tx = new StringBuffer(originalText);
    int ct = 1;//w w  w  .ja  v a  2  s. c o m
    while (igns.find()) {
        int s = igns.start();
        int e = igns.end();
        if (verbose)
            PrintUtil.printNoMove("Processing exclusions ...", ct++);
        //System.err.println("replacing\n-----------"+originalText.substring(s,e)+"\n--------------");
        char sp[] = new char[e - s];
        for (int j = 0; j < sp.length; j++) {
            sp[j] = ' ';
        }
        tx.replace(s, e, new String(sp));
    }
    if (verbose)
        PrintUtil.donePrinting();
    ct = 1;
    //verbose = false;
    String text = new String(tx);
    //System.out.println("-->"+text+"<--");
    Tokenizer tokenizer = new JapaneseTokenizer(new StringReader(text), null, true,
            org.apache.lucene.analysis.ja.JapaneseTokenizer.Mode.SEARCH);
    TokenStream stream = new JapaneseBaseFormFilter(tokenizer);
    //stream = new JapanesePartOfSpeechStopFilter(true, stream, stoptags);
    stream = new CJKWidthFilter(stream);
    //stream = new StopFilter(matchVersion, stream, stopwords);
    stream = new JapaneseKatakanaStemFilter(stream);
    //stream = new LowerCaseFilter(matchVersion, stream);

    OffsetAttribute offsetAttribute = stream.addAttribute(OffsetAttribute.class);
    CharTermAttribute charTermAttribute = stream.addAttribute(CharTermAttribute.class);

    while (stream.incrementToken()) {
        int startOffset = offsetAttribute.startOffset();
        int endOffset = offsetAttribute.endOffset();
        String token = charTermAttribute.toString();
        tokenMap.putPos(token, startOffset);
        //System.out.println(token.str+" \t\tS="+token.start+" E="+token.end);
    }
    if (verbose)
        PrintUtil.donePrinting();
    ct = 1;
}

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From source file:modnlp.idx.inverted.TokeniserJPLucene.java

License:Open Source License

public List<String> split(String s) {
    ArrayList<String> ret = new ArrayList<String>();
    try {//from   w w  w.  j  ava 2 s.  c  o m
        Tokenizer tokenizer = new JapaneseTokenizer(new StringReader(s), null, true,
                org.apache.lucene.analysis.ja.JapaneseTokenizer.Mode.SEARCH);
        TokenStream stream = new JapaneseBaseFormFilter(tokenizer);
        //stream = new JapanesePartOfSpeechStopFilter(true, stream, stoptags);
        stream = new CJKWidthFilter(stream);
        //stream = new StopFilter(matchVersion, stream, stopwords);
        stream = new JapaneseKatakanaStemFilter(stream);
        //stream = new LowerCaseFilter(matchVersion, stream);

        OffsetAttribute offsetAttribute = stream.addAttribute(OffsetAttribute.class);
        CharTermAttribute charTermAttribute = stream.addAttribute(CharTermAttribute.class);

        while (stream.incrementToken()) {
            int startOffset = offsetAttribute.startOffset();
            int endOffset = offsetAttribute.endOffset();
            String token = charTermAttribute.toString();
            ret.add(token);
            //System.out.println(token.str+" \t\tS="+token.start+" E="+token.end);
        }
    } catch (java.io.IOException e) {
        System.err.println(e);
    }
    return ret;
}

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From source file:modnlp.idx.inverted.TokeniserJPLucene.java

License:Open Source License

public TokenIndex getTokenIndex(String str) {
    TokenIndex ret = new TokenIndex();
    try {//from   www.j av  a 2s .  c  om
        Tokenizer tokenizer = new JapaneseTokenizer(new StringReader(str), null, true,
                org.apache.lucene.analysis.ja.JapaneseTokenizer.Mode.SEARCH);
        TokenStream stream = new JapaneseBaseFormFilter(tokenizer);
        //stream = new JapanesePartOfSpeechStopFilter(true, stream, stoptags);
        stream = new CJKWidthFilter(stream);
        //stream = new StopFilter(matchVersion, stream, stopwords);
        stream = new JapaneseKatakanaStemFilter(stream);
        //stream = new LowerCaseFilter(matchVersion, stream);

        OffsetAttribute offsetAttribute = stream.addAttribute(OffsetAttribute.class);
        CharTermAttribute charTermAttribute = stream.addAttribute(CharTermAttribute.class);

        while (stream.incrementToken()) {
            int startOffset = offsetAttribute.startOffset();
            int endOffset = offsetAttribute.endOffset();
            String token = charTermAttribute.toString();
            ret.add(startOffset, endOffset);
            //System.out.println(token.str+" \t\tS="+token.start+" E="+token.end);
        }
    } catch (java.io.IOException e) {
        System.err.println(e);
    }
    return ret;
}

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From source file:org.elasticsearch.indices.analysis.KuromojiIndicesAnalysis.java

License:Apache License

@Inject
public KuromojiIndicesAnalysis(Settings settings, IndicesAnalysisService indicesAnalysisService) {
    super(settings);

    indicesAnalysisService.analyzerProviderFactories().put("kuromoji",
            new PreBuiltAnalyzerProviderFactory("kuromoji", AnalyzerScope.INDICES, new JapaneseAnalyzer()));

    indicesAnalysisService.charFilterFactories().put("kuromoji_iteration_mark",
            new PreBuiltCharFilterFactoryFactory(new CharFilterFactory() {
                @Override/*from   www .j ava 2 s  .c o  m*/
                public String name() {
                    return "kuromoji_iteration_mark";
                }

                @Override
                public Reader create(Reader reader) {
                    return new JapaneseIterationMarkCharFilter(reader,
                            JapaneseIterationMarkCharFilter.NORMALIZE_KANJI_DEFAULT,
                            JapaneseIterationMarkCharFilter.NORMALIZE_KANA_DEFAULT);
                }
            }));

    indicesAnalysisService.tokenizerFactories().put("kuromoji_tokenizer",
            new PreBuiltTokenizerFactoryFactory(new TokenizerFactory() {
                @Override
                public String name() {
                    return "kuromoji_tokenizer";
                }

                @Override
                public Tokenizer create() {
                    return new JapaneseTokenizer(null, true, Mode.SEARCH);
                }
            }));

    indicesAnalysisService.tokenFilterFactories().put("kuromoji_baseform",
            new PreBuiltTokenFilterFactoryFactory(new TokenFilterFactory() {
                @Override
                public String name() {
                    return "kuromoji_baseform";
                }

                @Override
                public TokenStream create(TokenStream tokenStream) {
                    return new JapaneseBaseFormFilter(tokenStream);
                }
            }));

    indicesAnalysisService.tokenFilterFactories().put("kuromoji_part_of_speech",
            new PreBuiltTokenFilterFactoryFactory(new TokenFilterFactory() {
                @Override
                public String name() {
                    return "kuromoji_part_of_speech";
                }

                @Override
                public TokenStream create(TokenStream tokenStream) {
                    return new JapanesePartOfSpeechStopFilter(tokenStream,
                            JapaneseAnalyzer.getDefaultStopTags());
                }
            }));

    indicesAnalysisService.tokenFilterFactories().put("kuromoji_readingform",
            new PreBuiltTokenFilterFactoryFactory(new TokenFilterFactory() {
                @Override
                public String name() {
                    return "kuromoji_readingform";
                }

                @Override
                public TokenStream create(TokenStream tokenStream) {
                    return new JapaneseReadingFormFilter(tokenStream, true);
                }
            }));

    indicesAnalysisService.tokenFilterFactories().put("kuromoji_stemmer",
            new PreBuiltTokenFilterFactoryFactory(new TokenFilterFactory() {
                @Override
                public String name() {
                    return "kuromoji_stemmer";
                }

                @Override
                public TokenStream create(TokenStream tokenStream) {
                    return new JapaneseKatakanaStemFilter(tokenStream);
                }
            }));
}

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