es6/BehaviorSubject.js

import { Subject } from './Subject';
import { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';
/**
 * @class BehaviorSubject<T>
 */
export var BehaviorSubject = (function (_super) {
    __extends(BehaviorSubject, _super);
    function BehaviorSubject(_value) {
        _super.call(this);
        this._value = _value;
    }
    Object.defineProperty(BehaviorSubject.prototype, "value", {
        get: function () {
            return this.getValue();
        },
        enumerable: true,
        configurable: true
    });
    BehaviorSubject.prototype._subscribe = function (subscriber) {
        var subscription = _super.prototype._subscribe.call(this, subscriber);
        if (subscription && !subscription.closed) {
            subscriber.next(this._value);
        }
        return subscription;
    };
    BehaviorSubject.prototype.getValue = function () {
        if (this.hasError) {
            throw this.thrownError;
        }
        else if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        else {
            return this._value;
        }
    };
    BehaviorSubject.prototype.next = function (value) {
        _super.prototype.next.call(this, this._value = value);
    };
    return BehaviorSubject;
}(Subject));
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