1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374 |
- import { Observable } from '../Observable';
- /**
- * We need this JSDoc comment for affecting ESDoc.
- * @extends {Ignored}
- * @hide true
- */
- export class ErrorObservable extends Observable {
- constructor(error, scheduler) {
- super();
- this.error = error;
- this.scheduler = scheduler;
- }
- /**
- * Creates an Observable that emits no items to the Observer and immediately
- * emits an error notification.
- *
- * <span class="informal">Just emits 'error', and nothing else.
- * </span>
- *
- * <img src="./img/throw.png" width="100%">
- *
- * This static operator is useful for creating a simple Observable that only
- * emits the error notification. It can be used for composing with other
- * Observables, such as in a {@link mergeMap}.
- *
- * @example <caption>Emit the number 7, then emit an error.</caption>
- * var result = Rx.Observable.throw(new Error('oops!')).startWith(7);
- * result.subscribe(x => console.log(x), e => console.error(e));
- *
- * @example <caption>Map and flatten numbers to the sequence 'a', 'b', 'c', but throw an error for 13</caption>
- * var interval = Rx.Observable.interval(1000);
- * var result = interval.mergeMap(x =>
- * x === 13 ?
- * Rx.Observable.throw('Thirteens are bad') :
- * Rx.Observable.of('a', 'b', 'c')
- * );
- * result.subscribe(x => console.log(x), e => console.error(e));
- *
- * @see {@link create}
- * @see {@link empty}
- * @see {@link never}
- * @see {@link of}
- *
- * @param {any} error The particular Error to pass to the error notification.
- * @param {Scheduler} [scheduler] A {@link IScheduler} to use for scheduling
- * the emission of the error notification.
- * @return {Observable} An error Observable: emits only the error notification
- * using the given error argument.
- * @static true
- * @name throw
- * @owner Observable
- */
- static create(error, scheduler) {
- return new ErrorObservable(error, scheduler);
- }
- static dispatch(arg) {
- const { error, subscriber } = arg;
- subscriber.error(error);
- }
- /** @deprecated internal use only */ _subscribe(subscriber) {
- const error = this.error;
- const scheduler = this.scheduler;
- subscriber.syncErrorThrowable = true;
- if (scheduler) {
- return scheduler.schedule(ErrorObservable.dispatch, 0, {
- error, subscriber
- });
- }
- else {
- subscriber.error(error);
- }
- }
- }
- //# sourceMappingURL=ErrorObservable.js.map
|