51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
import {isPresent, BaseException} from 'angular2/src/facade/lang';
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import {ListWrapper, MapWrapper} from 'angular2/src/facade/collection';
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export class Locals {
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parent:Locals;
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current:Map;
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constructor(parent:Locals, current:Map) {
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this.parent = parent;
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this.current = current;
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}
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contains(name:string):boolean {
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if (MapWrapper.contains(this.current, name)) {
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return true;
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}
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if (isPresent(this.parent)) {
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return this.parent.contains(name);
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}
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return false;
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}
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get(name:string) {
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if (MapWrapper.contains(this.current, name)) {
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return MapWrapper.get(this.current, name);
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}
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if (isPresent(this.parent)) {
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return this.parent.get(name);
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}
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throw new BaseException(`Cannot find '${name}'`);
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}
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set(name:string, value) {
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// TODO(rado): consider removing this check if we can guarantee this is not
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// exposed to the public API.
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// TODO: vsavkin maybe it should check only the local map
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if (MapWrapper.contains(this.current, name)) {
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MapWrapper.set(this.current, name, value);
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} else {
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throw new BaseException('Setting of new keys post-construction is not supported.');
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}
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}
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clearValues() {
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MapWrapper.clearValues(this.current);
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}
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} |