import {Scheduler} from '../Scheduler';
import {Observable} from '../Observable';
import {Subscriber} from '../Subscriber';
import {Subscription} from '../Subscription';
export class ScalarObservable<T> extends Observable<T> {
static create<T>(value: T, scheduler?: Scheduler): ScalarObservable<T> {
return new ScalarObservable(value, scheduler);
}
static dispatch(state: any): void {
const { done, value, subscriber } = state;
if (done) {
subscriber.complete();
return;
}
subscriber.next(value);
if (subscriber.isUnsubscribed) {
return;
}
state.done = true;
(<any> this).schedule(state);
}
_isScalar: boolean = true;
constructor(public value: T, private scheduler?: Scheduler) {
super();
}
protected _subscribe(subscriber: Subscriber<T>): Subscription | Function | void {
const value = this.value;
const scheduler = this.scheduler;
if (scheduler) {
return scheduler.schedule(ScalarObservable.dispatch, 0, {
done: false, value, subscriber
});
} else {
subscriber.next(value);
Eif (!subscriber.isUnsubscribed) {
subscriber.complete();
}
}
}
}
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