ReferenceDescriptor.ts
97 lines
| 2.7 KiB
| video/mp2t
|
TypeScriptLexer
cin
|
r33 | import { isNull, argumentNotEmptyString, each } from "../safe"; | |
| class ReferenceDescriptor extends Descriptor { | |||
| _name: string | |||
| _lazy = false | |||
| _optional = false | |||
| _default: any | |||
| _services: object | |||
| constructor(name: string, lazy: boolean, optional: boolean, def, services: object) { | |||
| super(); | |||
| argumentNotEmptyString(name, "name"); | |||
| this._name = name; | |||
| this._lazy = Boolean(lazy); | |||
| this._optional = Boolean(optional); | |||
| this._default = def; | |||
| this._services = services; | |||
| } | |||
| activate(context: ActivationContext, name: string) { | |||
| var me = this; | |||
| context.enter(name, this, true); | |||
| // добавляем сервисы | |||
| if (me._services) { | |||
| for (var p in me._services) { | |||
| var sv = me._services[p]; | |||
| context.register(p, sv instanceof Descriptor ? sv : new AggregateDescriptor(sv)); | |||
| } | |||
| } | |||
| if (me._lazy) { | |||
| // сохраняем контекст активации | |||
| context = context.clone(); | |||
| return function (cfg) { | |||
| // защищаем контекст на случай исключения в процессе | |||
| // активации | |||
| var ct = context.clone(); | |||
| try { | |||
| if (cfg) | |||
| each(cfg, function (v, k) { | |||
| ct.register(k, v instanceof Descriptor ? v : new AggregateDescriptor(v)); | |||
| }); | |||
| return me._optional ? ct.getService(me._name, me._default) : ct | |||
| .getService(me._name); | |||
| } catch (error) { | |||
| throw new ActivationError(me._name, ct.getStack(), error); | |||
| } | |||
| }; | |||
| } | |||
| var v = me._optional ? | |||
| context.getService(me._name, me._default) : | |||
| context.getService(me._name); | |||
| context.leave(); | |||
| return v; | |||
| } | |||
| isInstanceCreated() { | |||
| return false; | |||
| } | |||
| getInstance() { | |||
| throw new Error("The reference descriptor doesn't allowed to hold an instance"); | |||
| } | |||
| toString() { | |||
| var opts = []; | |||
| if (this._optional) | |||
| opts.push("optional"); | |||
| if (this._lazy) | |||
| opts.push("lazy"); | |||
| var parts = [ | |||
| "@ref " | |||
| ]; | |||
| if (opts.length) { | |||
| parts.push("{"); | |||
| parts.push(opts.join()); | |||
| parts.push("} "); | |||
| } | |||
| parts.push(this._name); | |||
| if (!isNull(this._default)) { | |||
| parts.push(" = "); | |||
| parts.push(this._default); | |||
| } | |||
| return parts.join(""); | |||
| } | |||
| } |