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Avro, mail # user - c++ DataFileWriter not doing validation


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RE: c++ DataFileWriter not doing validation
SCHENK, Jarrad 2013-05-27, 06:47


> From: SCHENK, Jarrad
> Sent: Tuesday, 21 May 2013 12:52 PM
> To: [EMAIL PROTECTED]
> Subject: c++ DataFileWriter not doing validation
>
> Hi List,
>
> I'm working with the c++ bindings to try to write data to avro files.
>
> Much of the documentation assumes that the types to be written (and the code to write the data) are generated using avrogencpp.
>
> In my case I have an existing set of type/struct hierarchies that I'm trying to write so I don't want to use the output of avrogencpp  >directly. Instead I am producing code that is very similar to what avrogencpp outputs but is adapted to suit my types.
>
> What I'm finding is that the c++ DataFileWriter does no validation between the schema that I provide and the datums that get written. As such any discrepancy between the schema and the datums that are written causes the file to be corrupted and essentially unreadable.
>
> I see that there is a ValidatingEncoder class that can be used when serialising to a memorystream (as per the Getting Started docs) but there doesn't appear to be any method for using this encoder with the DataFileWriter.
>
> Am I missing something? Is there a preferred way to make the writer do validation?
>
> Thanks
>
> Jarrad

I never got any responses to this so I assume either no-one knows, or no-one actively uses the C++ bindings anymore?

My basic question boils down to can the DataFileWriter be made to do validation against the schema?

Any help much appreciated.

Jarrad
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