2 var __extends = (this && this.__extends) || (function () {
3 var extendStatics = function (d, b) {
4 extendStatics = Object.setPrototypeOf ||
5 ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
6 function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
7 return extendStatics(d, b);
9 return function (d, b) {
11 function __() { this.constructor = d; }
12 d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
15 Object.defineProperty(exports, "__esModule", { value: true });
16 var Subscriber_1 = require("../Subscriber");
17 var EmptyError_1 = require("../util/EmptyError");
18 function single(predicate) {
19 return function (source) { return source.lift(new SingleOperator(predicate, source)); };
21 exports.single = single;
22 var SingleOperator = (function () {
23 function SingleOperator(predicate, source) {
24 this.predicate = predicate;
27 SingleOperator.prototype.call = function (subscriber, source) {
28 return source.subscribe(new SingleSubscriber(subscriber, this.predicate, this.source));
30 return SingleOperator;
32 var SingleSubscriber = (function (_super) {
33 __extends(SingleSubscriber, _super);
34 function SingleSubscriber(destination, predicate, source) {
35 var _this = _super.call(this, destination) || this;
36 _this.predicate = predicate;
37 _this.source = source;
38 _this.seenValue = false;
42 SingleSubscriber.prototype.applySingleValue = function (value) {
44 this.destination.error('Sequence contains more than one element');
47 this.seenValue = true;
48 this.singleValue = value;
51 SingleSubscriber.prototype._next = function (value) {
52 var index = this.index++;
54 this.tryNext(value, index);
57 this.applySingleValue(value);
60 SingleSubscriber.prototype.tryNext = function (value, index) {
62 if (this.predicate(value, index, this.source)) {
63 this.applySingleValue(value);
67 this.destination.error(err);
70 SingleSubscriber.prototype._complete = function () {
71 var destination = this.destination;
73 destination.next(this.seenValue ? this.singleValue : undefined);
74 destination.complete();
77 destination.error(new EmptyError_1.EmptyError);
80 return SingleSubscriber;
81 }(Subscriber_1.Subscriber));
82 //# sourceMappingURL=single.js.map