45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
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import { EmptyError } from '../util/EmptyError';
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import { Subscriber } from '../Subscriber';
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export function throwIfEmpty(errorFactory = defaultErrorFactory) {
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return (source) => {
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return source.lift(new ThrowIfEmptyOperator(errorFactory));
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};
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}
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class ThrowIfEmptyOperator {
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constructor(errorFactory) {
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this.errorFactory = errorFactory;
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}
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call(subscriber, source) {
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return source.subscribe(new ThrowIfEmptySubscriber(subscriber, this.errorFactory));
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}
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}
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class ThrowIfEmptySubscriber extends Subscriber {
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constructor(destination, errorFactory) {
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super(destination);
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this.errorFactory = errorFactory;
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this.hasValue = false;
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}
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_next(value) {
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this.hasValue = true;
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this.destination.next(value);
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}
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_complete() {
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if (!this.hasValue) {
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let err;
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try {
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err = this.errorFactory();
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}
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catch (e) {
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err = e;
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}
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this.destination.error(err);
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}
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else {
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return this.destination.complete();
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}
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}
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}
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function defaultErrorFactory() {
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return new EmptyError();
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}
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//# sourceMappingURL=throwIfEmpty.js.map
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