60 lines
2.3 KiB
JavaScript
60 lines
2.3 KiB
JavaScript
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"use strict";
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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var Subscriber_1 = require('../Subscriber');
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/**
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* Catches errors on the observable to be handled by returning a new observable or throwing an error.
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* @param {function} selector a function that takes as arguments `err`, which is the error, and `caught`, which
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* is the source observable, in case you'd like to "retry" that observable by returning it again. Whatever observable
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* is returned by the `selector` will be used to continue the observable chain.
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* @return {Observable} an observable that originates from either the source or the observable returned by the
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* catch `selector` function.
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*/
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function _catch(selector) {
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var operator = new CatchOperator(selector);
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var caught = this.lift(operator);
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return (operator.caught = caught);
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}
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exports._catch = _catch;
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var CatchOperator = (function () {
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function CatchOperator(selector) {
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this.selector = selector;
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}
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CatchOperator.prototype.call = function (subscriber) {
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return new CatchSubscriber(subscriber, this.selector, this.caught);
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};
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return CatchOperator;
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}());
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var CatchSubscriber = (function (_super) {
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__extends(CatchSubscriber, _super);
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function CatchSubscriber(destination, selector, caught) {
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_super.call(this, destination);
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this.selector = selector;
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this.caught = caught;
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}
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// NOTE: overriding `error` instead of `_error` because we don't want
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// to have this flag this subscriber as `isStopped`.
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CatchSubscriber.prototype.error = function (err) {
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if (!this.isStopped) {
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var result = void 0;
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try {
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result = this.selector(err, this.caught);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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this._innerSub(result);
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}
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};
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CatchSubscriber.prototype._innerSub = function (result) {
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this.unsubscribe();
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this.destination.remove(this);
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result.subscribe(this.destination);
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};
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return CatchSubscriber;
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}(Subscriber_1.Subscriber));
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//# sourceMappingURL=catch.js.map
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