[Rprotobuf-yada] make prototypes of message , field extraction

[Romain François]

Hi,

Did the first part of this now. so we can now extract non repeated 
fields from a message (primitives and messages). Some precision might 
get lost in the way because R does not have long, etc ... but I don't 
think there is anything that can be done about that (apart from 
implementing them in R).

I've also added basic completion, so that :

 > Person<- P( "tutorial.Person", file = "/tmp/person.proto" )
 > p<- new( Person )
 > p$<TAB>
p$email  p$id     p$name   p$phone
 > Person$
Person$email        Person$name         Person$PhoneNumber
Person$id           Person$phone        Person$PhoneType

Now need to start thinking about repeated fields (arrays basically), and 
setters, so that we can do :

 > p$email <- "blabla at yada.com"

more type checking is needed for those.

I have a presentation in london next week, so I might not carry on much 
further, but I'll pick up emails if you guys have questions.

Romain

On 10/30/2009 11:17 AM, Romain François wrote:
>
> Hello,
>
> We might now use the new method to create prototypes of messages as
> described by a given descriptor :
>
> Person<- P( "tutorial.Person", file = "/tmp/person.proto" )
> p<- new( Person )
>
>
> I have added some code to prepare field extraction (but no code yet). It
> is in extractors.cpp
>
> SEXP extractFieldAsSEXP( const Message * message, const Descriptor*
> desc, const FieldDescriptor * fieldDesc ){
> 	
> 	/* depending on the type, we need to create some regular SEXP (INTSXP)
>          or a message */
> 	
>       FieldDescriptor::Type type =    fieldDesc->type() ;
>
> 	return R_NilValue;
> 	
> }
>
>
> The idea basically is to have a switch on the type and make the
> appropriate SEXP (INTSXP, STRSXP) for primitives or new instances of
> protobufMessage for messages.
>
> I'll have a look tonight if noone beats me to it (I need to get out now)
>
> Romain
>
> Ps: I have removed the #define foo Rf_foo
>


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Romain Francois
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http://romainfrancois.blog.free.fr
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