filterList.add(buildFilterQuery(FieldNames.FIELDS, fields));
        }

        if (!kinds.isEmpty()) {
            filterList.add(buildFilterQuery(FieldNames.KINDS, kinds));
        }

        if (filterList.size() > 0) {
            final BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
            boolQueryBuilder.must(queryBuilder);
            filterList.forEach(boolQueryBuilder::filter);

    /** The default operator to use between query terms */
    protected Operator defaultOperator = Operator.AND;

    /** List of filters to apply to queries */
    protected List<Filter> filterList = new ArrayList<>();

    /** The filter chain used to process queries */
    protected FilterChain filterChain;

    /**
     * Initializes the query parser by creating the filter chain.

    /**
     * List of filters that will be applied during query processing.
     * Filters are applied in the order they are added to this list.
     */
    protected List<Filter> filterList = new ArrayList<>();

    /**
     * The filter chain that processes queries through all registered filters
     * before executing the appropriate query command.
     */
    protected FilterChain filterChain;