Miško Hevery d169c2434e feat(core): Add type information to injector.get() (#13785)
- Introduce `InjectionToken<T>` which is a parameterized and type-safe
  version of `OpaqueToken`.

DEPRECATION:
- `OpaqueToken` is now deprecated, use `InjectionToken<T>` instead.
- `Injector.get(token: any, notFoundValue?: any): any` is now deprecated
  use the same method which is now overloaded as
  `Injector.get<T>(token: Type<T>|InjectionToken<T>, notFoundValue?: T): T;`.

Migration
- Replace `OpaqueToken` with `InjectionToken<?>` and parameterize it.
- Migrate your code to only use `Type<?>` or `InjectionToken<?>` as
  injection tokens. Using other tokens will not be supported in the
  future.

BREAKING CHANGE:
- Because `injector.get()` is now parameterize it is possible that code
  which used to work no longer type checks. Example would be if one
  injects `Foo` but configures it as `{provide: Foo, useClass: MockFoo}`.
  The injection instance will be that of `MockFoo` but the type will be
  `Foo` instead of `any` as in the past. This means that it was possible
  to call a method on `MockFoo` in the past which now will fail type
  check. See this example:

```
class Foo {}
class MockFoo extends Foo {
  setupMock();
}

var PROVIDERS = [
  {provide: Foo, useClass: MockFoo}
];

...

function myTest(injector: Injector) {
  var foo = injector.get(Foo);
  // This line used to work since `foo` used to be `any` before this
  // change, it will now be `Foo`, and `Foo` does not have `setUpMock()`.
  // The fix is to downcast: `injector.get(Foo) as MockFoo`.
  foo.setUpMock();
}
```

PR Close #13785
2017-01-17 15:34:54 -06:00

100 lines
2.9 KiB
TypeScript

/** @experimental */
export declare function bootstrapWorkerUi(workerScriptUri: string, customProviders?: Provider[]): Promise<PlatformRef>;
/** @experimental */
export declare abstract class ClientMessageBroker {
abstract runOnService(args: UiArguments, returnType: Type<any>): Promise<any>;
}
/** @experimental */
export declare abstract class ClientMessageBrokerFactory {
abstract createMessageBroker(channel: string, runInZone?: boolean): ClientMessageBroker;
}
/** @experimental */
export declare class FnArg {
type: Type<any>;
value: any;
constructor(value: any, type: Type<any>);
}
/** @experimental */
export declare abstract class MessageBus implements MessageBusSource, MessageBusSink {
abstract attachToZone(zone: NgZone): void;
abstract from(channel: string): EventEmitter<any>;
abstract initChannel(channel: string, runInZone?: boolean): void;
abstract to(channel: string): EventEmitter<any>;
}
/** @experimental */
export interface MessageBusSink {
attachToZone(zone: NgZone): void;
initChannel(channel: string, runInZone: boolean): void;
to(channel: string): EventEmitter<any>;
}
/** @experimental */
export interface MessageBusSource {
attachToZone(zone: NgZone): void;
from(channel: string): EventEmitter<any>;
initChannel(channel: string, runInZone: boolean): void;
}
/** @experimental */
export declare const platformWorkerApp: (extraProviders?: Provider[]) => PlatformRef;
/** @experimental */
export declare const platformWorkerUi: (extraProviders?: Provider[]) => PlatformRef;
/** @experimental */
export declare const PRIMITIVE: Type<any>;
/** @experimental */
export declare class ReceivedMessage {
args: any[];
id: string;
method: string;
type: string;
constructor(data: {
[key: string]: any;
});
}
/** @experimental */
export declare abstract class ServiceMessageBroker {
abstract registerMethod(methodName: string, signature: Type<any>[], method: Function, returnType?: Type<any>): void;
}
/** @experimental */
export declare abstract class ServiceMessageBrokerFactory {
abstract createMessageBroker(channel: string, runInZone?: boolean): ServiceMessageBroker;
}
/** @experimental */
export declare class UiArguments {
args: FnArg[];
method: string;
constructor(method: string, args?: FnArg[]);
}
/** @stable */
export declare const VERSION: Version;
/** @experimental */
export declare const WORKER_APP_LOCATION_PROVIDERS: ({
provide: typeof PlatformLocation;
useClass: typeof WebWorkerPlatformLocation;
} | {
provide: InjectionToken<(() => void)[]>;
useFactory: (platformLocation: WebWorkerPlatformLocation, zone: NgZone) => () => Promise<boolean>;
multi: boolean;
deps: (typeof NgZone | typeof PlatformLocation)[];
})[];
/** @experimental */
export declare const WORKER_UI_LOCATION_PROVIDERS: Provider[];
/** @experimental */
export declare class WorkerAppModule {
}