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feat(ivy): support injection flags at runtime (#23518)

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PR Close #23518
This commit is contained in:
Kara Erickson
2018-04-23 18:24:40 -07:00
committed by Igor Minar
parent ab5bc42da0
commit db77d8dc92
4 changed files with 324 additions and 52 deletions
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11
packages/core/src/di/injector.ts
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@ -413,19 +413,19 @@ function getClosureSafeProperty<T>(objWithPropertyToExtract: T): string {
* Injection flags for DI.
*/
export const enum InjectFlags {
Default = 0,
Default = 0b0000,
/**
* Specifies that an injector should retrieve a dependency from any injector until reaching the
* host element of the current component. (Only used with Element Injector)
*/
Host = 1 << 0,
Host = 0b0001,
/** Don't descend into ancestors of the node requesting injection. */
Self = 1 << 1,
Self = 0b0010,
/** Skip the node that is requesting injection. */
SkipSelf = 1 << 2,
SkipSelf = 0b0100,
/** Inject `defaultValue` instead if token not found. */
Optional = 1 << 3,
Optional = 0b1000,
}
/**
@ -467,6 +467,7 @@ export function inject<T>(token: Type<T>| InjectionToken<T>, flags = InjectFlags
return injectableDef.value === undefined ? injectableDef.value = injectableDef.factory() :
injectableDef.value;
}
if (flags & InjectFlags.Optional) return null;
throw new Error(`Injector: NOT_FOUND [${stringify(token)}]`);
} else {
return _currentInjector.get(token, flags & InjectFlags.Optional ? null : undefined, flags);