74 lines
2.6 KiB
TypeScript
74 lines
2.6 KiB
TypeScript
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/// <reference path="./disposables/disposable.ts" />
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/// <reference path="./checkedobserver.ts" />
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/// <reference path="./notification.ts" />
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module Rx {
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export interface Observer<T> {
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/**
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* Creates a notification callback from an observer.
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* @returns The action that forwards its input notification to the underlying observer.
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*/
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toNotifier(): (notification: Notification<T>) => void;
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/**
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* Hides the identity of an observer.
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* @returns An observer that hides the identity of the specified observer.
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*/
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asObserver(): Observer<T>;
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/**
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* Checks access to the observer for grammar violations. This includes checking for multiple OnError or OnCompleted calls, as well as reentrancy in any of the observer methods.
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* If a violation is detected, an Error is thrown from the offending observer method call.
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* @returns An observer that checks callbacks invocations against the observer grammar and, if the checks pass, forwards those to the specified observer.
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*/
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checked(): CheckedObserver<T>;
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/**
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* Schedules the invocation of observer methods on the given scheduler.
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* @param {Scheduler} scheduler Scheduler to schedule observer messages on.
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* @returns {Observer} Observer whose messages are scheduled on the given scheduler.
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*/
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notifyOn(scheduler: IScheduler): Observer<T>;
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}
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export interface ObserverStatic {
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/**
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* Creates an observer from a notification callback.
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*
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* @static
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* @memberOf Observer
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* @param {Function} handler Action that handles a notification.
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* @returns The observer object that invokes the specified handler using a notification corresponding to each message it receives.
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*/
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fromNotifier<T>(handler: (notification: Notification<T>, thisArg?: any) => void): Observer<T>;
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}
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}
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(function() {
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var observer: Rx.Observer<boolean>;
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var n: (notification: Rx.Notification<boolean>) => void = observer.toNotifier();
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var o: Rx.Observer<boolean> = observer.asObserver();
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var c: Rx.CheckedObserver<boolean> = observer.checked();
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o = observer.notifyOn(Rx.Scheduler.immediate);
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var so : Rx.Observer<number> = Rx.Observer.fromNotifier<number>((n) => {
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// Handle next calls
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if (n.kind === 'N') {
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console.log('Next: ' + n.value);
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}
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// Handle error calls
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if (n.kind === 'E') {
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console.log('Error: ' + n.exception);
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}
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// Handle completed
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if (n.kind === 'C') {
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console.log('Completed')
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}
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});
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});
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