Method scan

basex-core/src/main/java/org/basex/query/expr/ft/FTWords.java:220–262

Returns a scan-based index iterator. @param lexer lexer, including the queried value @param ftt full-text tokenizer @param data data reference @return node iterator @throws QueryException query exception

(final FTLexer lexer, final FTTokenizer ftt, final Data data)

   * @throws QueryException query exception
   */
  private FTIndexIterator scan(final FTLexer lexer, final FTTokenizer ftt, final Data data)
      throws QueryException {

    final FTLexer input = new FTLexer(ftOpt);
    final FTTokens fttokens = ftt.cache(lexer.token());
    return new FTIndexIterator() {
      final int sz = data.meta.size;
      int pre = -1, ps;

      @Override
      public int pre() {
        return pre;
      }
      @Override
      public boolean more() {
        while(++pre < sz) {
          if(data.kind(pre) != Data.TEXT) continue;
          input.init(data.text(pre, true));
          ftt.matches.reset(ps);
          try {
            if(contains(fttokens, input, ftt) != 0) return true;
          } catch(final QueryException ex) {
            // ignore exceptions
            Util.debug(ex);
          }
        }
        return false;
      }
      @Override
      public FTMatches matches() {
        return ftt.matches;
      }
      @Override
      public void pos(final int p) {
        ps = p;
      }
      @Override
      public int size() {
        // worst case
        return Math.max(1, sz >>> 1);
      }
    };
  }

  /**
   * Returns all tokens of the query input.