Server::Configuration::ServerFactoryContext& context) override {

    const auto& cel_matcher_config =

        dynamic_cast<const ::xds::type::matcher::v3::CelMatcher&>(config);

    CelMatcherSharedPtr cel_matcher =

        std::make_shared<::xds::type::matcher::v3::CelMatcher>(cel_matcher_config);

    return [cel_matcher = std::move(cel_matcher), &context] {

      return std::make_unique<CelInputMatcher>(cel_matcher,

                                               Filters::Common::Expr::getBuilder(context));

    };

  }

  ProtobufTypes::MessagePtr createEmptyConfigProto() override {

    return std::make_unique<CelMatcher>();

  }

  std::string name() const override { return "envoy.matching.matchers.cel_matcher"; }