source: trunk/gsdl/packages/kea/kea-3.0/IteratedLovinsStemmer.java@ 8815

/*
 *    IteratedLovinsStemmer.java
 *    Copyright (C) 2001 Eibe Frank
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import java.util.*;

/**
 * Implements the iterated version of the Lovins stemmer.
 *
 * @author Eibe Frank ([email protected])
 * @version 1.0
 */
public class IteratedLovinsStemmer extends LovinsStemmer {

  /**
   * Iterated stemming of the given word.
   */
  public String stem(String str) {

    if (str.length() <= 2) {
      return str;
    }
    String stemmed = super.stem(str);
    while (!stemmed.equals(str)) {
      str = stemmed;
      stemmed = super.stem(stemmed);
    }
    return stemmed;
  }

  /**
   * Stems text coming into stdin and writes it to stdout.
   */
  public static void main(String[] ops) {

    IteratedLovinsStemmer ls = new IteratedLovinsStemmer();

    try {
      int num;
      StringBuffer wordBuffer = new StringBuffer();
      while ((num = System.in.read()) != -1) {
    char c = (char)num;
    if (((num >= (int)'A') && (num <= (int)'Z')) ||
        ((num >= (int)'a') && (num <= (int)'z'))) {
      wordBuffer.append(c);
    } else {
      if (wordBuffer.length() > 0) {
        System.out.print(ls.stem(wordBuffer.toString().
                     toLowerCase()));
        wordBuffer = new StringBuffer();
      }
      System.out.print(c);
    }
      }
    } catch (Exception e) {
      System.err.println(e.getMessage());
    }
  }
}