Function GetKeyValueMetadata

cpp/src/arrow/ipc/metadata_internal.cc:1282–1300

}  // namespace

Status GetKeyValueMetadata(const KVVector* fb_metadata,
                           std::shared_ptr<KeyValueMetadata>* out) {
  if (fb_metadata == nullptr) {
    *out = nullptr;
    return Status::OK();
  }

  auto metadata = std::make_shared<KeyValueMetadata>();

  metadata->reserve(fb_metadata->size());
  for (const auto pair : *fb_metadata) {
    CHECK_FLATBUFFERS_NOT_NULL(pair->key(), "custom_metadata.key");
    CHECK_FLATBUFFERS_NOT_NULL(pair->value(), "custom_metadata.value");
    metadata->Append(pair->key()->str(), pair->value()->str());
  }

  *out = std::move(metadata);
  return Status::OK();
}

Status WriteSchemaMessage(const Schema& schema, const DictionaryFieldMapper& mapper,
                          const IpcWriteOptions& options, std::shared_ptr<Buffer>* out) {