On Wed, Apr 19, 2017 at 4:20 AM, Rohan Suri <[email protected]> wrote:
> Hello everyone,
>
> I'm trying to find the right Java APIs to do what protoc --decode_raw and
> protoc --decode do.
> Essentially handling two cases:
> 1) When I don't have the proto, and only the raw protobuf msg.
> eg protoc --decode_raw < rawmsg.bin
>
> 1: "rohan"
> 2 {
> 1: "13"
> 2: "08"
> 3: "94"
> }
>
> 2) When I have the .proto(not the generated classes, neither the parsed
> .proto)
> eg protoc --decode some.pkg.name.Person $proto_file_path < rawmsg.bin
>
> name: "rohan"
> dob {
> dd: "13"
> mm: "08"
> yy: "94"
> }
>
> I did dig google groups.
>
> From those the hints I've got is
> For case 1) Using CodedInputStream write my own parser? parsing bytes by
> making informed guesses.
>
> https://groups.google.com/forum/#!searchin/protobuf/
> decode$20without$20proto|sort:relevance/protobuf/7s4YIwrQLgk/r2Yc_36OYGAJ
> http://stackoverflow.com/questions/19647387/parsing-a-
> raw-protocol-buffer-byte-stream-in-c-sharp/19652735#19652735
> http://stackoverflow.com/questions/13937882/parsing-
> protocol-buffers-without-knowing-the-proto
>
> For case 2) well nothing. Everything I got assumed I have
> FileDescriptorProto for my .proto or instance of my message type.
>
2) requires parsing .proto files and that parser is in C++ only.
>
> Are there any add-on libraries present to handle these scenarios?
> Or any logic to go about solving them?
>
> Thanks.
>
>
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