import Query from './Query';
import Select from './nodes/Select';
import Limit from './nodes/Limit';
import Sort from './nodes/Sort';
import AbstractNode from './nodes/AbstractNode';
import GroupBy from './nodes/GroupBy';
export default class QueryStringifier {
    static stringify(query: Query): string;
    protected static encodeRql(value: string): string;
    protected static parseTopLevelNode(key: string, node: AbstractNode): any;
    protected static parseGroupNode(node?: GroupBy): string;
    protected static parseSelectNode(node?: Select): string;
    protected static parseSortNode(node?: Sort): string;
    protected static parseLimitNode(node?: Limit): string;
    protected static parseQueryNode(node?: AbstractNode): string;
    /**
     * Returns type `string:` if it is string, anf empty string, otherwise
     * @param value
     * @private
     */
    private static withType;
    /**
     * Encodes rql value and replaces empty strings and `null` with null()
     * @param value
     * @param isField
     * @private
     */
    private static withEncoding;
    protected static addUnion(queryString: string): string;
}