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