/*! Copyright (c) 2018 Siemens AG. Licensed under the MIT License. */
import { Observable } from "rxjs";
import { Controller, Uuid } from "..";
import { Observation, Sensor } from "./objects";
/**
 * Observes Sensors and Sensor-related objects. This controller is designed to
 * be used by a client as a counterpart to a SensorSourceController which should
 * answer its requests.
 */
export declare class SensorObserverController extends Controller {
    /**
     * Observe the channeled observations for the given Sensor. By default, the
     * channelId is the same as the sensorId.
     *
     * @param sensorId ObjectId of the sensor to listen observations of.
     * @param channelId ChannelId to listen to. This is by default the objectId
     * of the Sensor and therefore should be left undefined. (optional)
     */
    observeChanneledObservations(sensorId: Uuid, channelId?: string): Observable<Observation>;
    /**
     * Observe the advertised observations for the given Sensor.
     *
     * @param sensorId ObjectId of the sensor to listen observations of.
     */
    observeAdvertisedObservations(sensorId: Uuid): Observable<Observation>;
    /**
     * Returns an observable emitting advertised Sensors.
     *
     * This method does not perform any kind of caching and it should
     * be performed on the application-side.
     */
    observeAdvertisedSensors(): Observable<Sensor>;
    /**
     * Returns an observable of the Sensors in the system.
     *
     * This is performed by sending a Discovery event with the object type of
     * Sensor.
     *
     * This method does not perform any kind of caching and it should be
     * performed on the application-side.
     */
    discoverSensors(): Observable<Sensor>;
    /**
     * Returns an observable of the Sensors that are associated with this Thing.
     *
     * This is performed by sending a Query event for Sensor objects with the
     * parentObjectId matching the objectId of the Thing.
     *
     * This method does not perform any kind of caching and it should be
     * performed on the application-side.
     */
    querySensorsOfThing(thingId: Uuid): Observable<Sensor[]>;
}