Can you use an Any method, like unpack
<https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Any.html#unpack-java.lang.Class->
or getParserForType
<https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/Any.html#getParserForType-->
?
On Friday, January 21, 2022 at 2:24:36 AM UTC-8 qing zhou wrote:
> The proto file defined like this:
> message HqMessage {
> uint32 busi_no = 1;
> google.protobuf.Any detail = 2;
> }
>
> message B0T4F1 {
> uint32 MarketType = 501;
> }
> //---------------------------------------------------------------------
> *STEP1, *use protobuf's reflection, I had set the message of BOT4F1 to
> the 'detail':
> .......
> const google::protobuf::Descriptor* _detail_des =
> _des_pool->FindMessageTypeByName("B0T4F1");
> const google::protobuf::Message* _detail_prototype_message =
> m_dynamic_factory.GetPrototype(_detail_des);
> google::protobuf::Message* _detail_msg =
> _detail_prototype_message->New();
> const google::protobuf::Reflection* _detail_msg_ref =
> _detail_prototype_message->GetReflection();
> const google::protobuf::FieldDescriptor* _detail_fd =
> _detail_des->FindFieldByNumber(501);
> uint32 mkt_type =100;
> _fd = _des->FindFieldByNumber(2);
> _msg_ref ->*SetAllocatedMessage(*_msg, _detail_msg, _fd);
> .......
> *STEP2,*serialize the message to a buffer, then parse the HqMessage from
> the buffer.
> *STEP3**, firest, *I get the message of Any, then serialize the any
> message to buffer again. Finally，get the message object of B0T4F1 through
> the new buffer.
>
> How can i parse the buffer to the message of B0T4F1 without serialize
> ’detail' message again. Could I get the ‘B0T4F1' message from 'HqMessage '
> directly? How can i do this?
>
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