grpcpp/support/error_details.h

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/*
 *
 * Copyright 2017 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 
#ifndef GRPCPP_SUPPORT_ERROR_DETAILS_H
#define GRPCPP_SUPPORT_ERROR_DETAILS_H
 
#include <grpcpp/support/status.h>
 
namespace grpc {
 
template <typename T>
grpc::Status ExtractErrorDetails(const grpc::Status& from, T* to) {
  if (to == nullptr) {
    return grpc::Status(grpc::StatusCode::FAILED_PRECONDITION, "");
  }
  if (!to->ParseFromString(from.error_details())) {
    return grpc::Status(grpc::StatusCode::INVALID_ARGUMENT, "");
  }
  return grpc::Status::OK;
}
inline grpc::Status ExtractErrorDetails(const grpc::Status&, std::nullptr_t) {
  return grpc::Status(grpc::StatusCode::FAILED_PRECONDITION, "");
}
 
template <typename T>
grpc::Status SetErrorDetails(const T& from, grpc::Status* to) {
  if (to == nullptr) {
    return grpc::Status(grpc::StatusCode::FAILED_PRECONDITION, "");
  }
  grpc::StatusCode code = grpc::StatusCode::UNKNOWN;
  if (from.code() >= grpc::StatusCode::OK &&
      from.code() <= grpc::StatusCode::UNAUTHENTICATED) {
    code = static_cast<grpc::StatusCode>(from.code());
  }
  *to = grpc::Status(code, from.message(), from.SerializeAsString());
  return grpc::Status::OK;
}
 
}  // namespace grpc
 
#endif  // GRPCPP_SUPPORT_ERROR_DETAILS_H