Hi all,
I'm just getting to grips with protobuf and, having read through the
documentation, I'm struggling to find what I'm after.
Basically I'm trying to work out how to deserialize a protobuf message
without using the generated headers, as we're likely to get messages that
weren't generated at compile time. I've looked through the documentation,
but I only seem to be able to find ones that use generated classes to
deserialize, or that use a Descriptor from a generated class to create a
DynamicMessage, which I can't seem to work out how to do when we don't have
the proto.
Here's a very simple example of what I mean, where Message* is set to some
base type that allows deserialization, and then can use the reflection API
(or some factory) to correctly deal with the message:
#include <sstream>
#include "google/protobuf/message.h"
int main(int argc, char **argv)
{
if( argc > 1)
{
// This will fail to compile, as Message is pure abstract
google::protobuf::Message* message = NULL; //new
google::protobuf::Message();
std::istringstream ss(std::string(argv[1],strlen(argv[1])));
message->ParseFromIstream(&ss);
// do something with the message
// ...
}
return 0;
}
Apologies in advance if this has already been answered...
Thanks
Tom
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