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import { Observable } from '../Observable';
import { subscribeToResult } from '../util/subscribeToResult';
import { OuterSubscriber } from '../OuterSubscriber';
/**
* We need this JSDoc comment for affecting ESDoc.
* @extends {Ignored}
* @hide true
*/
export class UsingObservable extends Observable {
constructor(resourceFactory, observableFactory) {
super();
this.resourceFactory = resourceFactory;
this.observableFactory = observableFactory;
}
static create(resourceFactory, observableFactory) {
return new UsingObservable(resourceFactory, observableFactory);
}
/** @deprecated internal use only */ _subscribe(subscriber) {
const { resourceFactory, observableFactory } = this;
let resource;
try {
resource = resourceFactory();
return new UsingSubscriber(subscriber, resource, observableFactory);
}
catch (err) {
subscriber.error(err);
}
}
}
class UsingSubscriber extends OuterSubscriber {
constructor(destination, resource, observableFactory) {
super(destination);
this.resource = resource;
this.observableFactory = observableFactory;
destination.add(resource);
this.tryUse();
}
tryUse() {
try {
const source = this.observableFactory.call(this, this.resource);
if (source) {
this.add(subscribeToResult(this, source));
}
}
catch (err) {
this._error(err);
}
}
}
//# sourceMappingURL=UsingObservable.js.map