content: package org.apache.lucene.analysis.th;
  
  /**
   * Copyright 2006 The Apache Software Foundation
   *
   * 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.
   */
  
  import java.io.Reader;
  
  import org.apache.lucene.analysis.ReusableAnalyzerBase;
  import org.apache.lucene.analysis.Analyzer;
  import org.apache.lucene.analysis.StopAnalyzer;
  import org.apache.lucene.analysis.StopFilter;
  import org.apache.lucene.analysis.LowerCaseFilter;
  import org.apache.lucene.analysis.TokenStream;
  import org.apache.lucene.analysis.Tokenizer;
  import org.apache.lucene.analysis.standard.StandardAnalyzer;
  import org.apache.lucene.analysis.standard.StandardFilter;
  import org.apache.lucene.analysis.standard.StandardTokenizer;
  import org.apache.lucene.util.Version;
  
  /**
   * {@link Analyzer} for Thai language. It uses {@link java.text.BreakIterator} to break words.
   * @version 0.2
   *
   * <p><b>NOTE</b>: This class uses the same {@link Version}
   * dependent settings as {@link StandardAnalyzer}.</p>
   */
  public final class ThaiAnalyzer extends ReusableAnalyzerBase {
    private final Version matchVersion;
  
    public ThaiAnalyzer(Version matchVersion) {
      this.matchVersion = matchVersion;
    }
  
    /**
     * Creates
     * {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
     * used to tokenize all the text in the provided {@link Reader}.
     * 
     * @return {@link org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents}
     *         built from a {@link StandardTokenizer} filtered with
     *         {@link StandardFilter}, {@link LowerCaseFilter}, {@link ThaiWordFilter}, and
     *         {@link StopFilter}
     */
    @Override
    protected TokenStreamComponents createComponents(String fieldName,
        Reader reader) {
      final Tokenizer source = new StandardTokenizer(matchVersion, reader);
      TokenStream result = new StandardFilter(matchVersion, source);
      if (matchVersion.onOrAfter(Version.LUCENE_31))
        result = new LowerCaseFilter(matchVersion, result);
      result = new ThaiWordFilter(matchVersion, result);
      return new TokenStreamComponents(source, new StopFilter(matchVersion,
          result, StopAnalyzer.ENGLISH_STOP_WORDS_SET));
    }
  }
  