Beispiel #1
0
 /**
  * Converts the specified commands into a string list.
  *
  * @param comp input completions
  * @return string list
  */
 private static StringList list(final Enum<?>[] comp) {
   final StringList list = new StringList();
   if (comp != null) {
     for (final Enum<?> c : comp) list.add(c.name().toLowerCase(Locale.ENGLISH));
   }
   return list;
 }
Beispiel #2
0
  /**
   * Returns the found command or throws an exception.
   *
   * @param cmp possible completions
   * @param par parent command
   * @param <E> token type
   * @return index
   * @throws QueryException query exception
   */
  private <E extends Enum<E>> E consume(final Class<E> cmp, final Cmd par) throws QueryException {

    final String token = command(null);
    if (!suggest || token == null || !token.isEmpty()) {
      try {
        // return command reference; allow empty strings as input ("NULL")
        return Enum.valueOf(cmp, token == null ? "NULL" : token.toUpperCase(Locale.ENGLISH));
      } catch (final IllegalArgumentException ignore) {
      }
    }

    final Enum<?>[] alt = startWith(cmp, token);
    // handle empty input
    if (token == null) {
      if (par != null) throw help(alt, par);
      if (suggest) throw error(alt, EXPECTING_CMD);
      return null;
    }

    // output error for similar commands
    final byte[] name = uc(token(token));
    final Levenshtein ls = new Levenshtein();
    for (final Enum<?> s : startWith(cmp, null)) {
      final byte[] sm = uc(token(s.name()));
      if (ls.similar(name, sm) && Cmd.class.isInstance(s)) {
        throw error(alt, UNKNOWN_SIMILAR_X, name, sm);
      }
    }

    // show unknown command error or available command extensions
    throw par == null ? error(alt, UNKNOWN_TRY_X, token) : help(alt, par);
  }
Beispiel #3
0
 /**
  * Returns all commands that start with the specified user input.
  *
  * @param <T> token type
  * @param en available commands
  * @param prefix user input
  * @return completions
  */
 private static <T extends Enum<T>> Enum<?>[] startWith(final Class<T> en, final String prefix) {
   Enum<?>[] list = new Enum<?>[0];
   final String t = prefix == null ? "" : prefix.toUpperCase(Locale.ENGLISH);
   for (final Enum<?> e : en.getEnumConstants()) {
     if (e.name().startsWith(t)) {
       final int s = list.length;
       list = Array.copy(list, new Enum<?>[s + 1]);
       list[s] = e;
     }
   }
   return list;
 }