57 lines
2.5 KiB
TypeScript
57 lines
2.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Type} from '../interface/type';
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import {ReflectionCapabilities} from '../reflection/reflection_capabilities';
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import {getClosureSafeProperty} from '../util/property';
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import {resolveForwardRef} from './forward_ref';
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import {injectArgs, ɵɵinject} from './injector_compatibility';
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import {ClassSansProvider, ConstructorSansProvider, ExistingSansProvider, FactorySansProvider, StaticClassSansProvider, ValueProvider, ValueSansProvider} from './interface/provider';
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const USE_VALUE =
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getClosureSafeProperty<ValueProvider>({provide: String, useValue: getClosureSafeProperty});
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const EMPTY_ARRAY: any[] = [];
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export function convertInjectableProviderToFactory(
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type: Type<any>, provider?: ValueSansProvider | ExistingSansProvider | StaticClassSansProvider |
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ConstructorSansProvider | FactorySansProvider | ClassSansProvider): () => any {
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if (!provider) {
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const reflectionCapabilities = new ReflectionCapabilities();
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const deps = reflectionCapabilities.parameters(type);
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// TODO - convert to flags.
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return () => new type(...injectArgs(deps as any[]));
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}
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if (USE_VALUE in provider) {
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const valueProvider = (provider as ValueSansProvider);
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return () => valueProvider.useValue;
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} else if ((provider as ExistingSansProvider).useExisting) {
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const existingProvider = (provider as ExistingSansProvider);
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return () => ɵɵinject(resolveForwardRef(existingProvider.useExisting));
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} else if ((provider as FactorySansProvider).useFactory) {
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const factoryProvider = (provider as FactorySansProvider);
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return () => factoryProvider.useFactory(...injectArgs(factoryProvider.deps || EMPTY_ARRAY));
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} else if ((provider as StaticClassSansProvider | ClassSansProvider).useClass) {
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const classProvider = (provider as StaticClassSansProvider | ClassSansProvider);
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let deps = (provider as StaticClassSansProvider).deps;
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if (!deps) {
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const reflectionCapabilities = new ReflectionCapabilities();
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deps = reflectionCapabilities.parameters(type);
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}
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return () => new (resolveForwardRef(classProvider.useClass))(...injectArgs(deps));
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} else {
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let deps = (provider as ConstructorSansProvider).deps;
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if (!deps) {
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const reflectionCapabilities = new ReflectionCapabilities();
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deps = reflectionCapabilities.parameters(type);
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}
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return () => new type(...injectArgs(deps !));
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}
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}
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