import MillenniumDBError from './millenniumdb-error';
import { ResponseHandlerObserver } from './response-handler';
import { ResultObserver } from './result';
/**
 * CatalogObserver handles the stream of data coming from a catalog request
 */
declare class CatalogObserver implements ResponseHandlerObserver {
    private _error;
    private _summary;
    private _resultObserver;
    /**
     * This constructor should not be called directly
     */
    constructor();
    onVariables(_variables: Array<string>): void;
    onRecord(_record: Array<any>): void;
    onSuccess(summary: any): void;
    onError(error: MillenniumDBError): void;
    subscribe(resultObserver: ResultObserver): void;
}
export default CatalogObserver;