code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2020 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.dev.bigdata;
  
  import org.apache.commons.lang3.StringUtils;
  
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  import java.util.List;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  public class ConfusionSetFileFormatter {
  
    public static void main(String[] args) throws IOException {
      if (args.length != 1) {
        System.out.println("Usage: " + ConfusionSetFileFormatter.class.getSimpleName() + " <confusion_set.txt>");
        System.exit(1);
      }
      List<String> lines = Files.readAllLines(Paths.get(args[0]));
      for (String line : lines) {
        System.out.println(reformat(line));
      }
    }
  
    private static String reformat(String s) {
      Pattern pattern = Pattern.compile(";\\s*\\d+");
      Matcher matcher = pattern.matcher(s);
      if (matcher.find()) {
        int spaceStart = matcher.end();
        int spaceEnd = s.indexOf('#', 2);
        if (spaceStart > 0 && spaceEnd > 0) {
          String spaces = StringUtils.repeat(" ", 52-spaceStart);
          return s.substring(0, spaceStart+1) + spaces + s.substring(spaceEnd);
        }
      }
      return s;
    }
  
  }
  