code: /* LanguageTool, a natural language style checker 
   * Copyright (C) 2005 Daniel Naber (http://www.danielnaber.de)
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.tokenizers.ja;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import net.java.sen.*;
  import net.java.sen.dictionary.Token;
  
  import org.languagetool.tokenizers.Tokenizer;
  
  public class JapaneseWordTokenizer implements Tokenizer {
  
    private final StringTagger stringTagger;
  
    public JapaneseWordTokenizer() {
      stringTagger = SenFactory.getStringTagger(null, false);
    }
  
    @Override  
    public List<String> tokenize(String text) {
      List<String> ret = new ArrayList<>();
      try {
        synchronized (stringTagger) {
          List<Token> tokens = new ArrayList<>();
          stringTagger.analyze(text, tokens);
          for (Token token : tokens) {
            String basicForm;
            if (token.getMorpheme().getBasicForm().equalsIgnoreCase("*")) {
              basicForm = token.getSurface();
            } else {
              basicForm = token.getMorpheme().getBasicForm();
            }
            ret.add(token.getSurface() + " " + token.getMorpheme().getPartOfSpeech() + " " + basicForm);
          }
        }
      } catch (Exception e) {
        return ret;
      }
      return ret;
    }
  }
  