DynamicData to JSON/XML w/ Modern C++ API

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Tue, 04/17/2018 - 22:54
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kang
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DynamicData to JSON/XML w/ Modern C++ API

Hi,

I'd like to serialize a DynamicData sample to JSON/XML using the Modern C++ APIs.

I realize there are internal APIs:  DDS_DynamicDataFormatter_to_xml and DDS_DynamicDataFormatter_to_json.  But, these APIs seem to take DDS_DynamicData types as arguments.  Is there an equivalent API for the Modern C++ DynamicData type ?  Thanks!

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Wed, 04/18/2018 - 03:01
Fernando Garcia
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Hi Kang,

RTI Connext DDS 5.3.0 introduced a public APIs to transform DDS samples into XML or JSON. You can use these APIs with both DynamicData and IDL-generated types.

In the case of the Modern C++ API you will have to use rti::topic::to_string, which is documented here. Here is an example on how to transform a sample into JSON:

#include <rti/topic/to_string.hpp>

// ...
std::string str = rti::topic::to_string(sample, rti::topic::PrintFormatProperty::Json());
// ...

Let me know if this works for you.

Thanks,
Fernando.

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Wed, 04/18/2018 - 08:25
kang
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This is excellant.  I didn't realize this was added to 5.3.0.   Thanks for your help Fernando!

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Thu, 06/28/2018 - 07:38
Tacitus86
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This would be great to have for someone using 5.2.3... Any way around it for us stuck on older versions? (Using Java on my end).

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Mon, 08/27/2018 - 06:51
satheeshkumar.p...
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Is there any similar API in Java  to print received DDS sample  in Json or XML format.  ? 

C++ std::string str = rti::topic::to_string(sample, rti::topic::PrintFormatProperty::Json());

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