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.synthesis;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.languagetool.AnalyzedToken;
  
  /**
   * Part-of-speech synthesizer interface. Implementations are 
   * heavily language-dependent.
   * 
   * @author Marcin Miłkowski
   */
  public interface Synthesizer {
  
    /**
     * Generates a form of the word with a given POS tag for a given lemma.
     * @param token the token to be used for synthesis
     * @param posTag POS tag of the form to be generated
     */
    String[] synthesize(AnalyzedToken token, String posTag) throws IOException;
  
    /**
     * Generates a form of the word with a given POS tag for a given lemma.
     * POS tag can be specified using regular expressions. 
     * @param token the token to be used for synthesis
     * @param posTag POS tag of the form to be generated
     * @param posTagRegExp Specifies whether the posTag string is a regular expression.
     */
    String[] synthesize(AnalyzedToken token, String posTag, boolean posTagRegExp) throws IOException;
    
    /**
     * Gets a corrected version of the POS tag used for synthesis.
     * Useful when the tagset defines special disjunction that
     * need to be converted into regexp disjunctions.
     * @param posTag original POS tag to correct
     * @return converted POS tag
     */
    String getPosTagCorrection(String posTag);
    
    /**
     * Spells out a number
     * @param arabicNumeral in arabic numerals 
     * @return String of the spelled out number
     */
    
    String getSpelledNumber(String arabicNumeral);
    
    /**
     * Select the desired POS tag to synthesize
     */
    
    String getTargetPosTag (List<String> posTags, String targetPosTag);
    
  }
  