DummyProductCache.cc

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#include "art/Framework/IO/Root/detail/DummyProductCache.h"
#include "TClass.h"
#include "canvas/Utilities/Exception.h"

namespace art {
  namespace detail {

    EDProduct const*
    DummyProductCache::product(std::string const& wrappedName)
    {
      auto it = dummies_.find(wrappedName);
      if (it == dummies_.cend()) {
        TClass* cp = TClass::GetClass(wrappedName.c_str());
        if (cp == nullptr) {
          throw art::Exception(art::errors::DictionaryNotFound)
            << "TClass::GetClass() returned null pointer for name: "
            << wrappedName << '\n';
        }
        std::unique_ptr<EDProduct> dummy{
          reinterpret_cast<EDProduct*>(cp->New())};
        it = dummies_.emplace(wrappedName, move(dummy)).first;
      }
      return it->second.get();
    }

  } // namespace detail
} // namespace art