On Tue, Nov 10, 2009 at 6:25 AM, rahul prasad <rahu...@gmail.com> wrote:

> Hi,
> Is there a facility in protobuf library to retrieve data if the field
> numbers and wire types are known?

Write a .proto file with that information.  Then you can compile it, or you
can use protoc's --decode flag.

If you need something automated that runs as part of a larger app, you can
construct a FileDescriptorProto at run-time, which is a structured
representation of the contents of a .proto file.  You can then convert that
to a FileDescriptor using DescriptorPool (C++) or
Descriptors.FileDescriptor.buildFrom() (Java), and then construct a
DynamicMessage from the descriptors (either language).

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