On Sun, Nov 1, 2015 at 12:32 AM, Marco <a.f.ma...@gmail.com> wrote:

> The documentation mentions "An implementation may provide options to emit
> fields with default values in the JSON-encoded output."
>
> I assumed that meant an implementation of Printer class, ie. an
> alternative to  JsonFormat.printer().print(myMessage), but it appears
> that any implementation would depend on GeneratedMessage::getAllFields()
> which does not include default fields (GeneratedMessage:2123). I also
> read through descriptor.proto to see if there was an option for this, but
> that did not appear to be the case.
>
> Is there a way to do this out of the box, or would it require code
> changes? And would this be different for other languages? (This is using
> proto3, if that's not implied by the above.)
>
The option is not added yet. It will be something like:
JsonFormat.printer().printingDefaultValueFields().print(myMessage);

Likely it will be included in the next beta release.

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