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import { PartialObserver, ObservableNotification, CompleteNotification, NextNotification, ErrorNotification } from './types';
import { Observable } from './Observable';
/**
* @deprecated Use a string literal instead. `NotificationKind` will be replaced with a type alias in v8.
* It will not be replaced with a const enum as those are not compatible with isolated modules.
*/
export declare enum NotificationKind {
NEXT = "N",
ERROR = "E",
COMPLETE = "C"
}
/**
* Represents a push-based event or value that an {@link Observable} can emit.
* This class is particularly useful for operators that manage notifications,
* like {@link materialize}, {@link dematerialize}, {@link observeOn}, and
* others. Besides wrapping the actual delivered value, it also annotates it
* with metadata of, for instance, what type of push message it is (`next`,
* `error`, or `complete`).
*
* @see {@link materialize}
* @see {@link dematerialize}
* @see {@link observeOn}
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
export declare class Notification<T> {
readonly kind: 'N' | 'E' | 'C';
readonly value?: T | undefined;
readonly error?: any;
/**
* A value signifying that the notification will "next" if observed. In truth,
* This is really synonymous with just checking `kind === "N"`.
* @deprecated Will be removed in v8. Instead, just check to see if the value of `kind` is `"N"`.
*/
readonly hasValue: boolean;
/**
* Creates a "Next" notification object.
* @param kind Always `'N'`
* @param value The value to notify with if observed.
* @deprecated Internal implementation detail. Use {@link Notification#createNext createNext} instead.
*/
constructor(kind: 'N', value?: T);
/**
* Creates an "Error" notification object.
* @param kind Always `'E'`
* @param value Always `undefined`
* @param error The error to notify with if observed.
* @deprecated Internal implementation detail. Use {@link Notification#createError createError} instead.
*/
constructor(kind: 'E', value: undefined, error: any);
/**
* Creates a "completion" notification object.
* @param kind Always `'C'`
* @deprecated Internal implementation detail. Use {@link Notification#createComplete createComplete} instead.
*/
constructor(kind: 'C');
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param observer The observer to notify.
*/
observe(observer: PartialObserver<T>): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @param complete A complete handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void, error: (err: any) => void, complete: () => void): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void, error: (err: any) => void): void;
/**
* Executes the next handler if the Notification is of `kind` `"N"`. Otherwise
* this will not error, and it will be a noop.
* @param next The next handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @param complete A complete handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void, error: (err: any) => void, complete: () => void): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void, error: (err: any) => void): void;
/**
* Executes the next handler if the Notification is of `kind` `"N"`. Otherwise
* this will not error, and it will be a noop.
* @param next The next handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void): void;
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param observer The observer to notify.
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(observer: PartialObserver<T>): void;
/**
* Returns a simple Observable that just delivers the notification represented
* by this Notification instance.
*
* @deprecated Will be removed in v8. To convert a `Notification` to an {@link Observable},
* use {@link of} and {@link dematerialize}: `of(notification).pipe(dematerialize())`.
*/
toObservable(): Observable<T>;
private static completeNotification;
/**
* A shortcut to create a Notification instance of the type `next` from a
* given value.
* @param value The `next` value.
* @return The "next" Notification representing the argument.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createNext<T>(value: T): Notification<T> & NextNotification<T>;
/**
* A shortcut to create a Notification instance of the type `error` from a
* given error.
* @param err The `error` error.
* @return The "error" Notification representing the argument.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createError(err?: any): Notification<never> & ErrorNotification;
/**
* A shortcut to create a Notification instance of the type `complete`.
* @return The valueless "complete" Notification.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createComplete(): Notification<never> & CompleteNotification;
}
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param notification The notification object to observe.
* @param observer The observer to notify.
*/
export declare function observeNotification<T>(notification: ObservableNotification<T>, observer: PartialObserver<T>): void;
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