| 1 | "use strict";
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| 2 | var __extends = (this && this.__extends) || (function () {
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| 3 | var extendStatics = function (d, b) {
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| 4 | extendStatics = Object.setPrototypeOf ||
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| 5 | ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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| 6 | function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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| 7 | return extendStatics(d, b);
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| 8 | }
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| 9 | return function (d, b) {
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| 10 | extendStatics(d, b);
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| 11 | function __() { this.constructor = d; }
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| 12 | d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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| 13 | };
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| 14 | })();
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| 15 | Object.defineProperty(exports, "__esModule", { value: true });
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| 16 | var Subscriber_1 = require("../Subscriber");
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| 17 | var EmptyError_1 = require("../util/EmptyError");
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| 18 | function single(predicate) {
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| 19 | return function (source) { return source.lift(new SingleOperator(predicate, source)); };
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| 20 | }
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| 21 | exports.single = single;
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| 22 | var SingleOperator = (function () {
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| 23 | function SingleOperator(predicate, source) {
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| 24 | this.predicate = predicate;
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| 25 | this.source = source;
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| 26 | }
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| 27 | SingleOperator.prototype.call = function (subscriber, source) {
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| 28 | return source.subscribe(new SingleSubscriber(subscriber, this.predicate, this.source));
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| 29 | };
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| 30 | return SingleOperator;
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| 31 | }());
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| 32 | var SingleSubscriber = (function (_super) {
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| 33 | __extends(SingleSubscriber, _super);
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| 34 | function SingleSubscriber(destination, predicate, source) {
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| 35 | var _this = _super.call(this, destination) || this;
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| 36 | _this.predicate = predicate;
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| 37 | _this.source = source;
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| 38 | _this.seenValue = false;
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| 39 | _this.index = 0;
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| 40 | return _this;
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| 41 | }
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| 42 | SingleSubscriber.prototype.applySingleValue = function (value) {
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| 43 | if (this.seenValue) {
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| 44 | this.destination.error('Sequence contains more than one element');
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| 45 | }
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| 46 | else {
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| 47 | this.seenValue = true;
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| 48 | this.singleValue = value;
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| 49 | }
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| 50 | };
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| 51 | SingleSubscriber.prototype._next = function (value) {
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| 52 | var index = this.index++;
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| 53 | if (this.predicate) {
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| 54 | this.tryNext(value, index);
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| 55 | }
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| 56 | else {
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| 57 | this.applySingleValue(value);
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| 58 | }
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| 59 | };
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| 60 | SingleSubscriber.prototype.tryNext = function (value, index) {
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| 61 | try {
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| 62 | if (this.predicate(value, index, this.source)) {
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| 63 | this.applySingleValue(value);
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| 64 | }
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| 65 | }
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| 66 | catch (err) {
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| 67 | this.destination.error(err);
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| 68 | }
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| 69 | };
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| 70 | SingleSubscriber.prototype._complete = function () {
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| 71 | var destination = this.destination;
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| 72 | if (this.index > 0) {
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| 73 | destination.next(this.seenValue ? this.singleValue : undefined);
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| 74 | destination.complete();
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| 75 | }
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| 76 | else {
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| 77 | destination.error(new EmptyError_1.EmptyError);
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| 78 | }
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| 79 | };
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| 80 | return SingleSubscriber;
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| 81 | }(Subscriber_1.Subscriber));
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| 82 | //# sourceMappingURL=single.js.map |
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