if (req.getAttribute(Constants.DEFAULT_QUERY_OPERATOR) instanceof final String op) {
                parser.setDefaultOperator(Operator.valueOf(op));
            } else {
                parser.setDefaultOperator(defaultOperator);
            }
        }).orElse(() -> {
            parser.setDefaultOperator(defaultOperator);
        });
        return parser;
    }

        final List<String> keywords = new ArrayList<>();
        final List<TermQuery> termQueryList;
        try {
            final StandardQueryParser parser = new StandardQueryParser();
            parser.setDefaultOperator(StandardQueryConfigHandler.Operator.AND);

            termQueryList = getTermQueryList(parser.parse(q, "default"), fields);
        } catch (final Exception e) {
            return keywords;
        }