"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subscriber_1 = require('../Subscriber');
/**
 * If the source Observable is empty it returns an Observable that emits true, otherwise it emits false.
 *
 * <img src="./img/isEmpty.png" width="100%">
 *
 * @return {Observable} an Observable that emits a Boolean.
 * @method isEmpty
 * @owner Observable
 */
function isEmpty() {
    return this.lift(new IsEmptyOperator());
}
exports.isEmpty = isEmpty;
var IsEmptyOperator = (function () {
    function IsEmptyOperator() {
    }
    IsEmptyOperator.prototype.call = function (observer) {
        return new IsEmptySubscriber(observer);
    };
    return IsEmptyOperator;
}());
var IsEmptySubscriber = (function (_super) {
    __extends(IsEmptySubscriber, _super);
    function IsEmptySubscriber(destination) {
        _super.call(this, destination);
    }
    IsEmptySubscriber.prototype.notifyComplete = function (isEmpty) {
        var destination = this.destination;
        destination.next(isEmpty);
        destination.complete();
    };
    IsEmptySubscriber.prototype._next = function (value) {
        this.notifyComplete(false);
    };
    IsEmptySubscriber.prototype._complete = function () {
        this.notifyComplete(true);
    };
    return IsEmptySubscriber;
}(Subscriber_1.Subscriber));
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