63 lines
1.7 KiB
TypeScript
63 lines
1.7 KiB
TypeScript
import {Injectable, ViewMetadata, ComponentMetadata,} from '@angular/core';
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import {ReflectorReader, reflector} from '../core_private';
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import {Type, stringify, isBlank, isPresent} from '../src/facade/lang';
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import {BaseException} from '../src/facade/exceptions';
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import {Map} from '../src/facade/collection';
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/**
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* Resolves types to {@link ViewMetadata}.
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*/
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@Injectable()
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export class ViewResolver {
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/** @internal */
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_cache = new Map<Type, ViewMetadata>();
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constructor(private _reflector: ReflectorReader = reflector) {}
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resolve(component: Type): ViewMetadata {
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var view = this._cache.get(component);
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if (isBlank(view)) {
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view = this._resolve(component);
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this._cache.set(component, view);
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}
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return view;
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}
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/** @internal */
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_resolve(component: Type): ViewMetadata {
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var compMeta: ComponentMetadata;
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this._reflector.annotations(component).forEach(m => {
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if (m instanceof ComponentMetadata) {
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compMeta = m;
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}
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});
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if (isPresent(compMeta)) {
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if (isBlank(compMeta.template) && isBlank(compMeta.templateUrl)) {
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throw new BaseException(
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`Component '${stringify(component)}' must have either 'template' or 'templateUrl' set.`);
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} else {
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return new ViewMetadata({
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templateUrl: compMeta.templateUrl,
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template: compMeta.template,
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directives: compMeta.directives,
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pipes: compMeta.pipes,
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encapsulation: compMeta.encapsulation,
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styles: compMeta.styles,
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styleUrls: compMeta.styleUrls,
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animations: compMeta.animations
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});
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}
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} else {
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throw new BaseException(
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`Could not compile '${stringify(component)}' because it is not a component.`);
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}
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}
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}
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