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new AlwaysOnSampler();\n    this._remoteParentNotSampled =\n      config.remoteParentNotSampled ?? new AlwaysOffSampler();\n    this._localParentSampled =\n      config.localParentSampled ?? new AlwaysOnSampler();\n    this._localParentNotSampled =\n      config.localParentNotSampled ?? new AlwaysOffSampler();\n  }\n\n  shouldSample(\n    context: Context,\n    traceId: string,\n    spanName: string,\n    spanKind: SpanKind,\n    attributes: SpanAttributes,\n    links: Link[]\n  ): SamplingResult {\n    const parentContext = trace.getSpanContext(context);\n\n    if (!parentContext || !isSpanContextValid(parentContext)) {\n      return this._root.shouldSample(\n        context,\n        traceId,\n        spanName,\n        spanKind,\n        attributes,\n        links\n      );\n    }\n\n    if (parentContext.isRemote) {\n      if (parentContext.traceFlags & TraceFlags.SAMPLED) {\n        return this._remoteParentSampled.shouldSample(\n          context,\n          traceId,\n          spanName,\n          spanKind,\n          attributes,\n          links\n        );\n      }\n      return this._remoteParentNotSampled.shouldSample(\n        context,\n        traceId,\n        spanName,\n        spanKind,\n        attributes,\n        links\n      );\n    }\n\n    if (parentContext.traceFlags & TraceFlags.SAMPLED) {\n      return this._localParentSampled.shouldSample(\n        context,\n        traceId,\n        spanName,\n        spanKind,\n        attributes,\n        links\n      );\n    }\n\n    return this._localParentNotSampled.shouldSample(\n      context,\n      traceId,\n      spanName,\n      spanKind,\n      attributes,\n      links\n    );\n  }\n\n  toString(): string {\n    return `ParentBased{root=${this._root.toString()}, remoteParentSampled=${this._remoteParentSampled.toString()}, remoteParentNotSampled=${this._remoteParentNotSampled.toString()}, localParentSampled=${this._localParentSampled.toString()}, localParentNotSampled=${this._localParentNotSampled.toString()}}`;\n  }\n}\n\ninterface ParentBasedSamplerConfig {\n  /** Sampler called for spans with no parent */\n  root: Sampler;\n  /** Sampler called for spans with a remote parent which was sampled. Default AlwaysOn */\n  remoteParentSampled?: Sampler;\n  /** Sampler called for spans with a remote parent which was not sampled. Default AlwaysOff */\n  remoteParentNotSampled?: Sampler;\n  /** Sampler called for spans with a local parent which was sampled. Default AlwaysOn */\n  localParentSampled?: Sampler;\n  /** Sampler called for spans with a local parent which was not sampled. Default AlwaysOff */\n  localParentNotSampled?: Sampler;\n}\n"]}