ConvertHandle.cc

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#include "DataFormats/Common/interface/ConvertHandle.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "DataFormats/Common/interface/FunctorHandleExceptionFactory.h"

namespace edm {
  namespace handleimpl {
    static std::shared_ptr<HandleExceptionFactory> s_invalidRefFactory = makeHandleExceptionFactory([]()->std::shared_ptr<cms::Exception> {
      std::shared_ptr<cms::Exception> whyFailed = std::make_shared<edm::Exception>(errors::InvalidReference, "NullPointer");
      *whyFailed << "Handle has null pointer to data product";
      return whyFailed;
    });

    std::shared_ptr<HandleExceptionFactory> makeInvalidReferenceException() {
      return s_invalidRefFactory;
    }
    
    void throwConvertTypeError(std::type_info const& expected, std::type_info const& actual) {
      throw Exception(errors::LogicError, "TypeMismatch")
        << "edm::BasicHandle contains a product of type " << actual.name() << ".\n"
        << "A type of " << expected.name() << "was expected.";
    }
  }
}