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 //
 // ********************************************************************
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 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
 // * conditions of the Geant4 Software License,  included in the file *
 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
 // * include a list of copyright holders.                             *
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 // * institutes,nor the agencies providing financial support for this *
 // * work  make  any representation or  warranty, express or implied, *
 // * regarding  this  software system or assume any liability for its *
 // * use.  Please see the license in the file  LICENSE  and URL above *
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 // * This  code  implementation is the result of  the  scientific and *
 // * technical work of the GEANT4 collaboration.                      *
 // * By using,  copying,  modifying or  distributing the software (or *
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 // ********************************************************************
 //
 
 // Author: Ivana Hrivnacova, 18/06/2013  (ivana@ipno.in2p3.fr)
 
 #include "G4AnalysisUtilities.hh"
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4TFileManager<FT>::G4TFileManager(const G4AnalysisManagerState& state)
  : fAMState(state)
 {}
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4TFileManager<FT>::~G4TFileManager()
 {
   for ( const auto& mapElement : fFileMap ) {
     delete mapElement.second;
   }
 }
 
 //
 // private functions
 //
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 void
 G4TFileManager<FT>::FileNotFoundWarning(const G4String& fileName,
                       std::string_view functionName) const
 {
   G4Analysis::Warn("Failed to get file " + fileName, fkClass, functionName);
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4TFileInformation<FT>*
 G4TFileManager<FT>::GetFileInfoInFunction(const G4String& fileName,
                       std::string_view functionName, G4bool warn ) const
 {
   // Find the file information in the map
   auto it = fFileMap.find(fileName);
   if ( it == fFileMap.end() ) {
     if (warn) {
       FileNotFoundWarning(fileName, functionName);
     }
     return nullptr;
   }
 
   return it->second;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 std::shared_ptr<FT>
 G4TFileManager<FT>::GetFileInFunction(const G4String& fileName,
                       std::string_view functionName, G4bool warn) const
 {
   // Find the file information in the map
   auto fileInfo = GetFileInfoInFunction(fileName, functionName, warn);
   if (! fileInfo) return nullptr;
 
   // Check if the file is open
   if ( ! fileInfo->fFile ) {
     if (warn) {
       FileNotFoundWarning(fileName, functionName);
     }
     return nullptr;
   }
 
   return fileInfo->fFile;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::WriteTFile(std::shared_ptr<FT> file,
                                       [[maybe_unused]] const G4String& fileName)
 {
   fAMState.Message(G4Analysis::kVL4, "write", "file", fileName);
 
   // Write the found file
   auto result = WriteFileImpl(file);
 
   fAMState.Message(G4Analysis::kVL1, "write", "file", fileName, result);
 
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::CloseTFile(std::shared_ptr<FT> file,
                                       [[maybe_unused]] const G4String& fileName)
 {
   fAMState.Message(G4Analysis::kVL4, "close", "file", fileName);
 
   // Close the found file
   auto result = CloseFileImpl(file);
 
   fAMState.Message(G4Analysis::kVL1, "close", "file", fileName, result);
 
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::DeleteEmptyFile(const G4String& fileName)
 {
   fAMState.Message(G4Analysis::kVL4, "delete", "empty file", fileName);
 
   auto result = ! std::remove(fileName);
 
   fAMState.Message(G4Analysis::kVL1, "delete", "empty file", fileName, result);
 
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 void G4TFileManager<FT>::ClearData()
 {
   for ( const auto& mapElement : fFileMap ) {
     delete mapElement.second;
   }
   fFileMap.clear();
 
   fAMState.Message(G4Analysis::kVL2, "clear", "files");
 }
 
 //
 // public functions
 //
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 std::shared_ptr<FT> G4TFileManager<FT>::CreateTFile(const G4String& fileName)
 {
   // Just return the file if it already exists
   if ( auto file = GetFileInFunction(fileName, "CreateTFile", false);
       file != nullptr ) {
     return file;
     // should we also update fileInformation ??
   }
 
   auto fileInformation = GetFileInfoInFunction(fileName, "CreateTFile", false);
   if ( ! fileInformation ) {
     fAMState.Message(G4Analysis::kVL4, "create", "fileInformation", fileName);
 
     // Create file information and save it in the map
     fileInformation = new G4TFileInformation<FT>(fileName);
     fFileMap[fileName] = fileInformation;
   }
 
   // Create file and save it in fileInformation
   fAMState.Message(G4Analysis::kVL4, "create", "file", fileName);
 
   // Let concrete class create a file
   auto file = CreateFileImpl(fileName);
   if ( ! file ) {
     G4Analysis::Warn("Failed to create file " + fileName, fkClass, "CreateTFile");
     return nullptr;
   }
   // Save file in fileInformation
   fileInformation->fFile = file;
   fileInformation->fIsOpen = true;
   fileInformation->fIsEmpty = true;
   fileInformation->fIsDeleted = false;
 
   fAMState.Message(G4Analysis::kVL1, "create", "file", fileName);
 
   // Return created file
   return file;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::WriteTFile(const G4String& fileName)
 {
   // Find the file in the map
   auto file = GetFileInFunction(fileName, "WriteTFile");
   // Warning is issued in GetFileInfoFunction
   if (! file) return false;
 
   return WriteTFile(file, fileName);
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::CloseTFile(const G4String& fileName)
 {
   // Find the file information in the map
   auto fileInfo = GetFileInfoInFunction(fileName, "CloseTFile");
   // Warning is issued in GetFileInfoFunction
   if ( ! fileInfo ) return false;
 
   // Do nothing if file is not open
   if ( ! fileInfo->fIsOpen ) return false;
 
   // Get file from the file information
   auto file = fileInfo->fFile;
   if ( ! file ) {
     FileNotFoundWarning(fileName, "CloseTFile");
     return false;
   }
 
   auto result = CloseTFile(file, fileName);
 
   // Update the file information
   fileInfo->fFile.reset();
   fileInfo->fIsOpen = false;
 
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::SetIsEmpty(const G4String& fileName, G4bool isEmpty)
 {
   // Find the file information in the map
   auto fileInfo = GetFileInfoInFunction(fileName, "SetIsEmpty");
 
   // Warning is issued in GetFileFunction
   if ( ! fileInfo ) return false;
 
   fAMState.Message(G4Analysis::kVL4, "notify not empty", "file", fileName);
 
   // Set notification to file information
   if ( fileInfo->fIsEmpty ) {
     // do not revert information if file is not empty
     fileInfo->fIsEmpty = isEmpty;
 
     if ( ! isEmpty ) {
       fAMState.Message(G4Analysis::kVL3, "notify not empty", "file", fileName);
     }
   }
 
   return true;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 std::shared_ptr<FT> G4TFileManager<FT>::GetTFile(
   const G4String& fileName, G4bool warn) const
 {
   // Find the file information in the map
   return GetFileInFunction(fileName, "GetTFile", warn);
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::OpenFiles()
 {
   auto result = true;
   for ( const auto& mapElement : fFileMap ) {
      auto fileInformation = mapElement.second;
      // Do nothing if file was open by user explicitly
      if ( fileInformation->fFile ) {
        // G4cout << "... skipping open file for " << fileInformation->fFileName << G4endl;
        continue;
      }
 
      result &= (CreateTFile(fileInformation->fFileName) != nullptr);
   }
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::WriteFiles()
 {
   auto result = true;
   for ( const auto& mapElement : fFileMap ) {
      auto fileInformation = mapElement.second;
      if ( ! fileInformation->fIsOpen ) {
        // G4cout << "skipping write for file " << fileInformation->fFileName << G4endl;
        continue;
      }
      result &= WriteTFile(fileInformation->fFile, fileInformation->fFileName);
   }
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::CloseFiles()
 {
   auto result = true;
   for ( const auto& mapElement : fFileMap ) {
      auto fileInformation = mapElement.second;
      if ( ! fileInformation->fIsOpen ) {
        // G4cout << "skipping close for file " << fileInformation->fFileName << G4endl;
        continue;
      }
      result &= CloseTFile(fileInformation->fFile, fileInformation->fFileName);
 
      // Update file information
      fileInformation->fFile.reset();
      fileInformation->fIsOpen = false;
   }
 
   // As the files were set to nullptr, clear should not be needed
   // fFileMap.clear();
 
   return result;
 }
 
 //_____________________________________________________________________________
 template <typename FT>
 inline
 G4bool G4TFileManager<FT>::DeleteEmptyFiles()
 {
   auto result = true;
   for ( const auto& mapElement : fFileMap ) {
     auto fileInformation = mapElement.second;
     if ( (! fileInformation->fIsEmpty) || fileInformation->fIsDeleted ) {
       // G4cout << "skipping delete for file " << fileInformation->fFileName << G4endl;
       continue;
     }
 
     result &= DeleteEmptyFile(fileInformation->fFileName);
 
     // Update file information
     fileInformation->fIsDeleted = true;
   }
 
   return result;
 }

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