public void setMatchFinder(int matchFinderIndex) {
        if (matchFinderIndex < 0 || matchFinderIndex > 2) {
            return;
        }
        int matchFinderIndexPrev = _matchFinderType;
        _matchFinderType = matchFinderIndex;
        if (_matchFinder != null && matchFinderIndexPrev != _matchFinderType) {
            _dictionarySizePrev = -1;
            _matchFinder = null;
        }
    }