Esempio n. 1
0
 /**
  * Returns a key similar to the specified string, or {@code null}.
  *
  * @param key key to be found
  * @return similar key
  */
 public final synchronized String similar(final String key) {
   final byte[] name = token(key);
   final Levenshtein ls = new Levenshtein();
   for (final String prop : props.keySet()) {
     if (ls.similar(name, token(prop), 0)) return prop;
   }
   return null;
 }
Esempio n. 2
0
  /**
   * Performs a fuzzy search for the specified token with a maximum number of errors.
   *
   * @param token token to look for
   * @param k number of errors allowed
   * @return iterator
   */
  private synchronized IndexIterator fuzzy(final byte[] token, final int k) {
    FTIndexIterator it = FTIndexIterator.FTEMPTY;
    final int tokl = token.length, tl = tp.length;
    final int e = Math.min(tl - 1, tokl + k);
    int s = Math.max(1, tokl - k) - 1;

    while (++s <= e) {
      int p = tp[s];
      if (p == -1) continue;
      int t = s + 1, r = -1;
      while (t < tl && r == -1) r = tp[t++];
      while (p < r) {
        if (ls.similar(inY.readBytes(p, s), token, k)) {
          it = FTIndexIterator.union(iter(pointer(p, s), size(p, s), inZ, token), it);
        }
        p += s + ENTRY;
      }
    }
    return it;
  }