import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import { Feature, FeatureService } from '../../feature';
import { DataSource } from '../../datasource';
import { Layer } from '../../layer';
import { QueryOptions } from './query.interface';
export declare class QueryService {
    private http;
    private featureService;
    constructor(http: HttpClient, featureService: FeatureService);
    query(layers: Layer[], options: QueryOptions): Observable<Feature[]>[];
    queryDataSource(dataSource: DataSource, options: QueryOptions, zIndex: number): Observable<Feature[]>;
    private extractData(res, dataSource, options, url, zIndex);
    private extractGML2Data(res, zIndex);
    private extractGML3Data(res, zIndex);
    private extractGeoJSONData(res);
    private extractTextData(res);
    private extractHtmlData(res, htmlTarget, url);
    private getQueryParams(url);
    private featureToResult(feature, zIndex);
}