@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
92 lines • 3.39 kB
JavaScript
;
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");
/**
* Converts an Observable of {@link Notification} objects into the emissions
* that they represent.
*
* <span class="informal">Unwraps {@link Notification} objects as actual `next`,
* `error` and `complete` emissions. The opposite of {@link materialize}.</span>
*
* 
*
* `dematerialize` is assumed to operate an Observable that only emits
* {@link Notification} objects as `next` emissions, and does not emit any
* `error`. Such Observable is the output of a `materialize` operation. Those
* notifications are then unwrapped using the metadata they contain, and emitted
* as `next`, `error`, and `complete` on the output Observable.
*
* Use this operator in conjunction with {@link materialize}.
*
* ## Example
* Convert an Observable of Notifications to an actual Observable
* ```ts
* import { of, Notification } from 'rxjs';
* import { dematerialize } from 'rxjs/operators';
*
* const notifA = new Notification('N', 'A');
* const notifB = new Notification('N', 'B');
* const notifE = new Notification('E', undefined,
* new TypeError('x.toUpperCase is not a function')
* );
* const materialized = of(notifA, notifB, notifE);
* const upperCase = materialized.pipe(dematerialize());
* upperCase.subscribe(x => console.log(x), e => console.error(e));
*
* // Results in:
* // A
* // B
* // TypeError: x.toUpperCase is not a function
* ```
*
* @see {@link Notification}
* @see {@link materialize}
*
* @return {Observable} An Observable that emits items and notifications
* embedded in Notification objects emitted by the source Observable.
* @method dematerialize
* @owner Observable
*/
function dematerialize() {
return function dematerializeOperatorFunction(source) {
return source.lift(new DeMaterializeOperator());
};
}
exports.dematerialize = dematerialize;
var DeMaterializeOperator = /** @class */ (function () {
function DeMaterializeOperator() {
}
DeMaterializeOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new DeMaterializeSubscriber(subscriber));
};
return DeMaterializeOperator;
}());
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var DeMaterializeSubscriber = /** @class */ (function (_super) {
__extends(DeMaterializeSubscriber, _super);
function DeMaterializeSubscriber(destination) {
return _super.call(this, destination) || this;
}
DeMaterializeSubscriber.prototype._next = function (value) {
value.observe(this.destination);
};
return DeMaterializeSubscriber;
}(Subscriber_1.Subscriber));
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