37 lines
1022 B
TypeScript
37 lines
1022 B
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 {CompileReflector} from './compile_reflector';
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import {NgModule, Type, createNgModule} from './core';
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import {findLast} from './directive_resolver';
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import {stringify} from './util';
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/**
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* Resolves types to {@link NgModule}.
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*/
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export class NgModuleResolver {
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constructor(private _reflector: CompileReflector) {}
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isNgModule(type: any) { return this._reflector.annotations(type).some(createNgModule.isTypeOf); }
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resolve(type: Type, throwIfNotFound = true): NgModule|null {
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const ngModuleMeta: NgModule =
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findLast(this._reflector.annotations(type), createNgModule.isTypeOf);
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if (ngModuleMeta) {
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return ngModuleMeta;
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} else {
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if (throwIfNotFound) {
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throw new Error(`No NgModule metadata found for '${stringify(type)}'.`);
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}
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return null;
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}
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}
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}
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