angular-cn/modules/benchpress/src/metric/multi_metric.ts

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import {bind, Binding, Injector, OpaqueToken} from 'angular2/di';
import {ListWrapper, StringMapWrapper, StringMap} from 'angular2/src/core/facade/collection';
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import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
import {Metric} from '../metric';
export class MultiMetric extends Metric {
static createBindings(childTokens): Binding[] {
return [
bind(_CHILDREN)
.toFactory(
(injector: Injector) => ListWrapper.map(childTokens, (token) => injector.get(token)),
[Injector]),
bind(MultiMetric).toFactory(children => new MultiMetric(children), [_CHILDREN])
];
}
constructor(private _metrics: Metric[]) { super(); }
/**
* Starts measuring
*/
beginMeasure(): Promise<any> {
return PromiseWrapper.all(ListWrapper.map(this._metrics, (metric) => metric.beginMeasure()));
}
/**
* Ends measuring and reports the data
* since the begin call.
* @param restart: Whether to restart right after this.
*/
endMeasure(restart: boolean): Promise<StringMap<string, any>> {
return PromiseWrapper.all(
ListWrapper.map(this._metrics, (metric) => metric.endMeasure(restart)))
.then((values) => { return mergeStringMaps(values); });
}
/**
* Describes the metrics provided by this metric implementation.
* (e.g. units, ...)
*/
describe(): StringMap<string, any> {
return mergeStringMaps(this._metrics.map((metric) => metric.describe()));
}
}
function mergeStringMaps(maps): Object {
var result = {};
ListWrapper.forEach(maps, (map) => {
StringMapWrapper.forEach(map, (value, prop) => { result[prop] = value; });
});
return result;
}
var _CHILDREN = new OpaqueToken('MultiMetric.children');