}

            @Override
            public String getQueryAdditionalSearchFields() {
                return "";
            }

            @Override
            public String getQueryAdditionalFacetFields() {
                return "";
            }

            @Override
            public String getQueryAdditionalSortFields() {
                return "";
            }

            }

            @Override
            public String getQueryAdditionalSearchFields() {
                return "";
            }

            @Override
            public String getQueryAdditionalFacetFields() {
                return "";
            }

            @Override
            public String getQueryAdditionalSortFields() {
                return "";
            }

            @Override
            public String[] getQueryAdditionalSearchFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalFacetFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalSortFields(String... fields) {
                return fields;

            @Override
            public String[] getQueryAdditionalSearchFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalFacetFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalSortFields(String... fields) {
                return fields;

                return baseConfig.getQueryAdditionalSearchFields(fields);
            }

            @Override
            public String[] getQueryAdditionalFacetFields(String... fields) {
                return baseConfig.getQueryAdditionalFacetFields(fields);
            }

            @Override
            public String[] getQueryAdditionalSortFields(String... fields) {

            @Override
            public String[] getQueryAdditionalSearchFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalFacetFields(String... fields) {
                return fields;
            }

            @Override
            public String[] getQueryAdditionalSortFields(String... fields) {
                return fields;

            searchFieldSet = new HashSet<>();
            Collections.addAll(searchFieldSet, searchFields);
        }
        if (facetFields == null) {
            facetFields = fessConfig.getQueryAdditionalFacetFields(//
                    fessConfig.getIndexFieldUrl(), //
                    fessConfig.getIndexFieldHost(), //
                    fessConfig.getIndexFieldTitle(), //