Class ServiceContainer

packages/fairygui/src/core/ServiceContainer.ts:63–223

 * ```
 */
export class ServiceContainer {
    private _registrations: Map<ServiceIdentifier, ServiceRegistration> = new Map();
    private _resolving: Set<ServiceIdentifier> = new Set();
    private _disposed: boolean = false;

    /**
     * Register a singleton service
     * 注册单例服务
     */
    public registerSingleton<T>(
        identifier: ServiceIdentifier<T>,
        factory: ServiceFactory<T>
    ): this {
        this.checkDisposed();
        this._registrations.set(identifier, {
            factory,
            lifecycle: EServiceLifecycle.Singleton
        });
        return this;
    }

    /**
     * Register a singleton instance directly
     * 直接注册单例实例
     */
    public registerInstance<T>(identifier: ServiceIdentifier<T>, instance: T): this {
        this.checkDisposed();
        this._registrations.set(identifier, {
            factory: () => instance,
            lifecycle: EServiceLifecycle.Singleton,
            instance
        });
        return this;
    }

    /**
     * Register a transient service (new instance per resolution)
     * 注册瞬时服务（每次解析创建新实例）
     */
    public registerTransient<T>(
        identifier: ServiceIdentifier<T>,
        factory: ServiceFactory<T>
    ): this {
        this.checkDisposed();
        this._registrations.set(identifier, {
            factory,
            lifecycle: EServiceLifecycle.Transient
        });
        return this;
    }

    /**
     * Resolve a service
     * 解析服务
     */
    public resolve<T>(identifier: ServiceIdentifier<T>): T {
        this.checkDisposed();