com.weclay.ksearch2.BasicKoreanAnalyzer.java Source code

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Here is the source code for com.weclay.ksearch2.BasicKoreanAnalyzer.java

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/**
 * Copyright 2012 Weclay Inc.
 *
 * 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.
 */

package com.weclay.ksearch2;

import java.io.Reader;
import java.io.StringReader;
import java.io.IOException;
import org.apache.lucene.util.Version;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.WhitespaceTokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;

public final class BasicKoreanAnalyzer extends Analyzer {
    public TokenStream tokenStream(String fieldName, Reader reader) {
        TokenStream stream = new WhitespaceTokenizer(Version.LUCENE_35, reader);
        stream = new KoreanStemFilter(stream, "ksearch_dic/");
        return stream;
    }

    public static void main(String[] args) throws IOException {
        // text to tokenize
        //final String text = "  ? ?";
        //String text = " ,?, ?";
        String text = " ??.   . DB ?  ? ?? , ? ? , , ?,  ? ... ? ?  ? ? ?.";

        BasicKoreanAnalyzer analyzer = new BasicKoreanAnalyzer();
        TokenStream stream = analyzer.tokenStream("field", new StringReader(text));

        // get the TermAttribute from the TokenStream
        CharTermAttribute termAtt = (CharTermAttribute) stream.addAttribute(CharTermAttribute.class);
        OffsetAttribute offsetAtt = (OffsetAttribute) stream.addAttribute(OffsetAttribute.class);

        stream.reset();

        // print all tokens until stream is exhausted
        while (stream.incrementToken()) {
            System.out.println(termAtt + ": " + termAtt.length() + " (" + offsetAtt.startOffset() + ":"
                    + offsetAtt.endOffset() + ")");
        }

        stream.end();
        stream.close();
    }
}