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//
// Author: Ivana Hrivnacova, 26/08/2021 (ivana@ipno.in2p3.fr)

#include "G4AnalysisUtilities.hh"

//_____________________________________________________________________________
template <typename HT>
inline
tools::raxml_out* G4XmlRFileManager::GetHandler(
  const G4String& fileName, const G4String& objectName,
  std::string_view inFunction)
{
// Get buffer for reading object specified by objectName and objectType
// for a file specified by fileName;
// open the file if it was not yet open

  // Histograms and profiles are not saved per thread
  // and ntuple file name is already updated
  auto rfile = GetRFile(fileName);
  if ( ! rfile ) {
    if ( ! OpenRFile(fileName) ) return nullptr;
    rfile = GetRFile(fileName);
  }

  tools::raxml_out* handler = nullptr;
  if ( rfile ) {
    std::vector<tools::raxml_out>& objects = rfile->objects();
    std::vector<tools::raxml_out>::iterator it;
    for (it = objects.begin(); it!=objects.end(); ++it) {
      tools::raxml_out& object = *it;
      if ( (object.cls().compare(HT::s_class()) == 0) &&
           (object.name().compare(objectName) == 0) ) {
        handler = &object;
        handler->disown();
        break;
      }
    }
  }

  if ( ! handler ) {
    G4Analysis::Warn(
      "Cannot get " + objectName + " in file " + fileName,
      fkClass, inFunction);
    return nullptr;
  }

  return handler;
}