defaultIfEmpty.js
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"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
function defaultIfEmpty(defaultValue) {
if (defaultValue === void 0) { defaultValue = null; }
return function (source) { return source.lift(new DefaultIfEmptyOperator(defaultValue)); };
}
exports.defaultIfEmpty = defaultIfEmpty;
var DefaultIfEmptyOperator = (function () {
function DefaultIfEmptyOperator(defaultValue) {
this.defaultValue = defaultValue;
}
DefaultIfEmptyOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new DefaultIfEmptySubscriber(subscriber, this.defaultValue));
};
return DefaultIfEmptyOperator;
}());
var DefaultIfEmptySubscriber = (function (_super) {
__extends(DefaultIfEmptySubscriber, _super);
function DefaultIfEmptySubscriber(destination, defaultValue) {
var _this = _super.call(this, destination) || this;
_this.defaultValue = defaultValue;
_this.isEmpty = true;
return _this;
}
DefaultIfEmptySubscriber.prototype._next = function (value) {
this.isEmpty = false;
this.destination.next(value);
};
DefaultIfEmptySubscriber.prototype._complete = function () {
if (this.isEmpty) {
this.destination.next(this.defaultValue);
}
this.destination.complete();
};
return DefaultIfEmptySubscriber;
}(Subscriber_1.Subscriber));
//# sourceMappingURL=defaultIfEmpty.js.map