Method hasDenseCtorMetadata

packages/core/injector/injector.ts:1154–1183

(
    wrapper: InstanceWrapper<T>,
    inject: InjectorDependency[] | undefined,
    metadata: InstanceWrapper[] | undefined,
  )

  }

  private hasDenseCtorMetadata<T>(
    wrapper: InstanceWrapper<T>,
    inject: InjectorDependency[] | undefined,
    metadata: InstanceWrapper[] | undefined,
  ): boolean {
    if (!metadata) {
      return false;
    }

    // The fast path requires a fully populated metadata array.
    // While another request is still registering dependency metadata,
    // sparse entries here would feed request-scoped factories `undefined`.
    const expectedDepsLength = !isNil(inject)
      ? inject.length
      : wrapper.metatype
        ? this.reflectConstructorParams(wrapper.metatype).length
        : 0;

    if (metadata.length !== expectedDepsLength) {
      return false;
    }

    for (let index = 0; index < expectedDepsLength; index++) {
      if (metadata[index] === undefined) {
        return false;
      }
    }

    return true;
  }

  private resolveScopedComponentHost(
    item: InstanceWrapper,