public class Parameters
{
   private static String output_dir;
   private static String log_filename, known_classes_filename, groups_filename;
   private static int threads;

   static
   {
      output_dir = "../output/";
      log_filename = "../last_log";
      known_classes_filename = "../data/KNOWN_CLASSES";
      groups_filename = "../data/GROUPS";
      threads = 8;
   }

   private Parameters () {} /** utility class **/

   public static boolean set_parameters (final String[] args)
   {
      int i;

      for (i = 0; i < args.length; i++)
      {
         if(args[i].equals("--outputs"))
         {
            i++;
            output_dir = args[i];
         }
         else if(args[i].equals("--log"))
         {
            i++;
            log_filename = args[i];
         }
         else if(args[i].equals("--classes"))
         {
            i++;
            known_classes_filename = args[i];
         }
         else if(args[i].equals("--groups"))
         {
            i++;
            groups_filename = args[i];
         }
         else if(args[i].equals("--threads"))
         {
            i++;
            threads = Integer.parseInt(args[i]);
         }
         else if(args[i].equals("--help") || args[i].equals("-h"))
         {
            usage();

            return false;
         }
         else
         {
            System.err.println("[W] Unknown parameter:" + args[i]);
         }
      }

      return true;
   }

   private static void usage ()
   {
      final StringBuilder sb;

      sb = new StringBuilder();

      sb.append
      (
         ").\n\"--outputs directory\": where the 'ICS' files are written "
         + "(default: "
      );
      sb.append(output_dir);

      sb.append
      (
         ").\n\"--log filename\": where the errors are reported (default: "
      );
      sb.append(log_filename);

      sb.append
      (
         ").\n\"--classes filename\": file containing the known classes "
         + "(default: "
      );
      sb.append(known_classes_filename);

      sb.append
      (
         ").\n\"--groups filename\": file containing the groups (default: "
      );
      sb.append(groups_filename);

      sb.append
      (
         ").\n\"--threads number\": maximum number of threads running at "
         + "any time (default: "
      );
      sb.append(threads);

      sb.append
      (
         ").\n\"--help\": prints this instead of converting (alias: \"-h\")."
      );

      System.out.println(sb.toString());
   }

   public static String get_output_directory ()
   {
      return output_dir;
   }

   public static String get_log_filename ()
   {
      return log_filename;
   }

   public static String get_known_classes_filename ()
   {
      return known_classes_filename;
   }

   public static String get_groups_filename ()
   {
      return groups_filename;
   }

   public static int get_max_threads ()
   {
      return threads;
   }
}