How to convert the dynamic data generated by json_deserialize into the dynamic data created by DynamicPubSubType::create_data()?

[com-server-ap]

I have a requirement: receive a JSON string and convert it into data to be published, similar to rostopic pub.
My approach is as follows:
first convert the JSON into dynamic data

  DynamicData::_ref_type dyn_data;
  eprosima::fastdds::dds::DynamicType::_ref_type dyn_type;

  if (nullptr == dyn_pub_sub_type_) {
    // type_ is static typesupport
    (*type_)->register_type_object_representation();
    eprosima::fastdds::dds::xtypes::TypeIdentifierPair type_identifie_pair;
    eprosima::fastdds::dds::DomainParticipantFactory::get_instance()
        ->type_object_registry()
        .get_type_identifiers(type_->get_type_name(), type_identifie_pair);

    // get typeobject
    eprosima::fastdds::dds::xtypes::TypeObject type_object;
    eprosima::fastdds::dds::DomainParticipantFactory::get_instance()->type_object_registry()
        .get_type_object(type_identifie_pair.type_identifier2(), type_object);

    // dynmaic Type builder
    eprosima::fastdds::dds::DynamicTypeBuilder::_ref_type builder =
        eprosima::fastdds::dds::DynamicTypeBuilderFactory::get_instance()->create_type_w_type_object(type_object);

    // create dynamic type and DynamicPubSubTYpe
    dyn_type = builder->build();
    dyn_pub_sub_type_ =std::make_shared<eprosima::fastdds::dds::DynamicPubSubType>(dyn_type);
  } else {
    dyn_type = dyn_pub_sub_type_->get_dynamic_type();
  }

  if (RETCODE_OK != json_deserialize(json, dyn_type,
                                     DynamicDataJsonFormat::EPROSIMA,
                                     dyn_data)) {
    lyos_log_error("json_deserialize failed");
    return false;
  }

Second, serialize the dynamic data.

  auto size = 
  dyn_pub_sub_type_->calculate_serialized_size(dyn_data.get(),eprosima::fastdds::dds::DEFAULT_DATA_REPRESENTATION);
  eprosima::fastdds::rtps::SerializedPayload_t payload_data(size);
  dyn_pub_sub_type_->serialize(dyn_data.get(), payload_data,eprosima::fastdds::dds::DEFAULT_DATA_REPRESENTATION);

Finally, convert it into static data and send it out.

 auto data = type_->create_data();
 type_->deserialize(payload_data, data);
 if (RETCODE_OK != (*writer_)->write(data)) {
   lyos_log_error("publishJson failed: write failed");
   return false;
 }

But when I execute the second step dyn_pub_sub_type_->calculate_serialized_size(), a core dump occurs.
If I use the data generated by dyn_pub_sub_type_->create_data() as the parameter, no problem occurs. However, this data cannot be passed to json_deserialize. I think this is because the dynamic data generated by json_deserialize is inconsistent with the data created by dyn_pub_sub_type_->create_data(). How should I handle this? Is there a similar example I can refer to?

[com-server-ap]

Additionally, the version is Fast DDS 3.3.0.

[com-server-ap]

Who can help me? I would be deeply grateful.

[com-server-ap]

It seems that the dynamic data converted by json_deserialize() cannot be sent.

[com-server-ap]

The issue has been resolved. It was caused by my misuse of DynamicData::_ref_type in DynamicPubSubType::serialize().
the right way is :

 uint32_t serialized_size = dyn_pub_sub_type_->calculate_serialized_size(
      &dyn_data, XCDR_DATA_REPRESENTATION);
  eprosima::fastdds::rtps::SerializedPayload_t serialized_payload(
      serialized_size);
  dyn_pub_sub_type_->serialize(&dyn_data, serialized_payload,
                               XCDR_DATA_REPRESENTATION);