70 lines
1.8 KiB
TypeScript
70 lines
1.8 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 {InjectionToken, Injector} from '@angular/core';
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import {Metric} from '../metric';
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export class MultiMetric extends Metric {
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static provideWith(childTokens: any[]): any[] {
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return [
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{
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provide: _CHILDREN,
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useFactory: (injector: Injector) => childTokens.map(token => injector.get(token)),
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deps: [Injector]
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},
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{
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provide: MultiMetric,
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useFactory: (children: Metric[]) => new MultiMetric(children),
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deps: [_CHILDREN]
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}
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];
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}
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constructor(private _metrics: Metric[]) {
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super();
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}
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/**
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* Starts measuring
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*/
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beginMeasure(): Promise<any> {
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return Promise.all(this._metrics.map(metric => metric.beginMeasure()));
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}
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/**
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* Ends measuring and reports the data
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* since the begin call.
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* @param restart: Whether to restart right after this.
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*/
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endMeasure(restart: boolean): Promise<{[key: string]: any}> {
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return Promise.all(this._metrics.map(metric => metric.endMeasure(restart)))
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.then(values => mergeStringMaps(<any>values));
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}
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/**
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* Describes the metrics provided by this metric implementation.
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* (e.g. units, ...)
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*/
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describe(): {[key: string]: any} {
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return mergeStringMaps(this._metrics.map((metric) => metric.describe()));
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}
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}
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function mergeStringMaps(maps: {[key: string]: string}[]): {[key: string]: string} {
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const result: {[key: string]: string} = {};
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maps.forEach(map => {
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Object.keys(map).forEach(prop => {
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result[prop] = map[prop];
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});
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});
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return result;
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}
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const _CHILDREN = new InjectionToken('MultiMetric.children');
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