Utilities/interface/Payload2XMLModule.h

0001 #ifndef CondCore_Utilities_Payload2XMLModule_h
0002 #define CondCore_Utilities_Payload2XMLModule_h
0003
0004 #include <string>
0005 #include <memory>
0006
0007 #include <pybind11/pybind11.h>
0008
0009 namespace py = pybind11;
0010
0011 #include "CondFormats/Serialization/interface/Archive.h"
0012
0013 #define XML_CONVERTER_NAME(CLASS_NAME) (std::string(#CLASS_NAME) + "2xml").c_str()
0014
0015 #define PAYLOAD_2XML_MODULE(MODULE_NAME) PYBIND11_MODULE(MODULE_NAME, m)
0016
0017 #define PAYLOAD_2XML_CLASS(CLASS_NAME)                                    \
0018   py::class_<Payload2xml<CLASS_NAME> >(m, XML_CONVERTER_NAME(CLASS_NAME)) \
0019       .def(py::init<>())                                                  \
0020       .def("write", &Payload2xml<CLASS_NAME>::write);
0021
0022 #include <boost/version.hpp>
0023 namespace cond {
0024   inline std::string boost_version_label() {
0025     std::stringstream ss;
0026     ss << BOOST_VERSION / 100000 << ".";
0027     ss << BOOST_VERSION / 100 % 1000 << ".";
0028     ss << BOOST_VERSION % 100;
0029     return ss.str();
0030   }
0031 }  // namespace cond
0032
0033 namespace {  // Avoid cluttering the global namespace.
0034
0035   template <typename PayloadType>
0036   class Payload2xml {
0037   public:
0038     Payload2xml() {}
0039     //
0040     std::string write(const std::string &payloadData) {
0041       // now to convert
0042       std::unique_ptr<PayloadType> payload;
0043       std::stringbuf sdataBuf;
0044       sdataBuf.pubsetbuf(const_cast<char *>(payloadData.c_str()), payloadData.size());
0045
0046       std::istream inBuffer(&sdataBuf);
0047       cond::serialization::InputArchive ia(inBuffer);
0048       payload.reset(new PayloadType);
0049       ia >> (*payload);
0050
0051       // now we have the object in memory, convert it to xml in a string and return it
0052       std::ostringstream outBuffer;
0053       {
0054         boost::archive::xml_oarchive xmlResult(outBuffer);
0055         xmlResult << boost::serialization::make_nvp("cmsCondPayload", *payload);
0056       }
0057       return outBuffer.str();
0058     }
0059   };
0060
0061 }  // end namespace
0062
0063 #endif