208f3d4c65
Note that the previous type of StringMap was overly permissive and didn't catch errors. Also we have to explicitly type empty objects, which is explained here: https://github.com/Microsoft/TypeScript/issues/5089 Closes #4487
59 lines
1.6 KiB
TypeScript
59 lines
1.6 KiB
TypeScript
import {isBlank, isPresent, CONST, Type} from 'angular2/src/core/facade/lang';
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import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
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import {StringMapWrapper} from 'angular2/src/core/facade/collection';
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import {
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Injectable,
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OptionalMetadata,
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SkipSelfMetadata,
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Binding,
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Injector,
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bind
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} from 'angular2/src/core/di';
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import {PipeBinding} from './pipe_binding';
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import * as cd from 'angular2/src/core/change_detection/pipes';
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export class ProtoPipes {
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static fromBindings(bindings: PipeBinding[]): ProtoPipes {
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var config: {[key: string]: PipeBinding} = {};
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bindings.forEach(b => config[b.name] = b);
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return new ProtoPipes(config);
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}
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constructor(
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/**
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* Map of {@link PipeMetadata} names to {@link PipeMetadata} implementations.
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*/
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public config: {[key: string]: PipeBinding}) {
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this.config = config;
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}
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get(name: string): PipeBinding {
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var binding = this.config[name];
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if (isBlank(binding)) throw new BaseException(`Cannot find pipe '${name}'.`);
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return binding;
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}
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}
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export class Pipes implements cd.Pipes {
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_config: {[key: string]: cd.SelectedPipe} = {};
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constructor(public proto: ProtoPipes, public injector: Injector) {}
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get(name: string): cd.SelectedPipe {
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var cached = StringMapWrapper.get(this._config, name);
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if (isPresent(cached)) return cached;
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var p = this.proto.get(name);
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var transform = this.injector.instantiateResolved(p);
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var res = new cd.SelectedPipe(transform, p.pure);
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if (p.pure) {
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StringMapWrapper.set(this._config, name, res);
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}
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return res;
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}
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}
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