ActivationContext.ts
132 lines
| 3.0 KiB
| video/mp2t
|
TypeScriptLexer
cin
|
r49 | import { TraceSource } from "../log/TraceSource"; | ||
| import { argumentNotNull, argumentNotEmptyString, isPrimitive, each, isNull } from "../safe"; | ||||
| import { Descriptor, ServiceMap } from "./interfaces"; | ||||
| import { Container } from "./Container"; | ||||
| const trace = TraceSource.get("@implab/core/di/ActivationContext"); | ||||
| export interface ActivationContextInfo { | ||||
| name: string; | ||||
| service: string; | ||||
| scope: ServiceMap; | ||||
| } | ||||
| export class ActivationContext { | ||||
| _cache: object; | ||||
| _services: ServiceMap; | ||||
| _stack: ActivationContextInfo[]; | ||||
| _visited: object; | ||||
| _name: string; | ||||
| _localized: boolean; | ||||
| container: Container; | ||||
| constructor(container: Container, services: ServiceMap, name?: string, cache?: object, visited?) { | ||||
| argumentNotNull(container, "container"); | ||||
| argumentNotNull(services, "services"); | ||||
| this._name = name; | ||||
| this._visited = visited || {}; | ||||
| this._stack = []; | ||||
| this._cache = cache || {}; | ||||
| this._services = services; | ||||
| this.container = container; | ||||
| } | ||||
| getName() { | ||||
| return this._name; | ||||
| } | ||||
| resolve(name, def?): any { | ||||
| const d = this._services[name]; | ||||
| if (!d) | ||||
| if (arguments.length > 1) | ||||
| return def; | ||||
| else | ||||
| throw new Error(`Service ${name} not found`); | ||||
| return this.activate(d, name); | ||||
| } | ||||
| /** | ||||
| * registers services local to the the activation context | ||||
| * | ||||
| * @name{string} the name of the service | ||||
| * @service{string} the service descriptor to register | ||||
| */ | ||||
| register(name: string, service: Descriptor) { | ||||
| argumentNotEmptyString(name, "name"); | ||||
| this._services[name] = service; | ||||
| } | ||||
| clone() { | ||||
| return new ActivationContext( | ||||
| this.container, | ||||
| this._services, | ||||
| this._name, | ||||
| this._cache, | ||||
| this._visited | ||||
| ); | ||||
| } | ||||
| has(id: string) { | ||||
| return id in this._cache; | ||||
| } | ||||
| get(id: string) { | ||||
| return this._cache[id]; | ||||
| } | ||||
| store(id: string, value) { | ||||
| return (this._cache[id] = value); | ||||
| } | ||||
| activate(d: Descriptor, name: string) { | ||||
| if (trace.isLogEnabled()) | ||||
| trace.log(`enter ${name} ${d}`); | ||||
| this.enter(name, d.toString()); | ||||
| const v = d.activate(this); | ||||
| this.leave(); | ||||
| if (trace.isLogEnabled()) | ||||
| trace.log(`leave ${name}`); | ||||
| return v; | ||||
| } | ||||
| visit(id: string) { | ||||
| const count = this._visited[id] || 0; | ||||
| this._visited[id] = count + 1; | ||||
| return count; | ||||
| } | ||||
| getStack() { | ||||
| return this._stack.slice().reverse(); | ||||
| } | ||||
| private enter(name: string, service: string) { | ||||
| this._stack.push({ | ||||
| name, | ||||
| service, | ||||
| scope: this._services | ||||
| }); | ||||
| this._name = name; | ||||
| this._services = Object.create(this._services); | ||||
| } | ||||
| private leave() { | ||||
| const ctx = this._stack.pop(); | ||||
| this._services = ctx.scope; | ||||
| this._name = ctx.name; | ||||
| } | ||||
| } | ||||