import MillenniumDBError from './millenniumdb-error';
import QueryObserver from './query-observer';
import Record from './record';
import { QueryPreamble } from './response-handler';
export interface ResultObserver {
    /** Event handler triggered when variables are available. This should be the first event triggered during a query */
    onVariables?: (variables: Array<string>, queryPreamble?: QueryPreamble) => void;
    /** Event handler triggered when a record is available */
    onRecord?: (record: Record) => void;
    /** Event handler triggered after a successful execution */
    onSuccess?: (summary: any) => void;
    /** Event handler triggered when an error occurs */
    onError?: (error: MillenniumDBError) => void;
}
/**
 * Result represents the result of a query
 */
declare class Result {
    _queryPreamble: QueryPreamble | null;
    private readonly _queryObserver;
    private _variables;
    private _summary;
    private _error;
    private _recordsPromise;
    /**
     * This constructor should never be called directly
     *
     * @param queryObserver the {@link QueryObserver} that will handle the received data
     */
    constructor(queryObserver: QueryObserver);
    /**
     * Get the variables associated with the result
     *
     * @returns a promise that resolves when the variables are received
     */
    variables(): Promise<Array<string>>;
    /**
     * Get the records associated with the result
     *
     * @returns a promise that resolves when the records are received
     */
    records(): Promise<Array<Record>>;
    /**
     * Get the summary associated with the result
     *
     * @returns a promise that resolves when the summary is received
     */
    summary(): Promise<any>;
    /**
     *
     * @param observer the {@link ResultObserver} that will handle the received data
     */
    subscribe(observer: ResultObserver): void;
    unsubscribe(): void;
    /**
     * Wrap the observer in order to store relevant query information
     *
     * @param observer the {@link ResultObserver} that will handle the received data
     * @returns the observer wrapped
     */
    private _wrapObserver;
}
export default Result;