"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');
var ArgumentOutOfRangeError_1 = require('../util/ArgumentOutOfRangeError');
var EmptyObservable_1 = require('../observable/EmptyObservable');
/**
 * @throws {ArgumentOutOfRangeError} When using `take(i)`, it delivers an
 * ArgumentOutOrRangeError to the Observer's `error` callback if `i < 0`.
 * @param total
 * @return {any}
 * @method take
 * @owner Observable
 */
function take(total) {
    if (total === 0) {
        return new EmptyObservable_1.EmptyObservable();
    }
    else {
        return this.lift(new TakeOperator(total));
    }
}
exports.take = take;
var TakeOperator = (function () {
    function TakeOperator(total) {
        this.total = total;
        if (this.total < 0) {
            throw new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError;
        }
    }
    TakeOperator.prototype.call = function (subscriber, source) {
        return source._subscribe(new TakeSubscriber(subscriber, this.total));
    };
    return TakeOperator;
}());
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
var TakeSubscriber = (function (_super) {
    __extends(TakeSubscriber, _super);
    function TakeSubscriber(destination, total) {
        _super.call(this, destination);
        this.total = total;
        this.count = 0;
    }
    TakeSubscriber.prototype._next = function (value) {
        var total = this.total;
        if (++this.count <= total) {
            this.destination.next(value);
            if (this.count === total) {
                this.destination.complete();
                this.unsubscribe();
            }
        }
    };
    return TakeSubscriber;
}(Subscriber_1.Subscriber));
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