RObjectManager.cxx

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// Local include(s):
#include "xAODRootAccess/tools/RObjectManager.h"
 
#include "xAODRootAccess/tools/Message.h"
#include "xAODRootAccess/tools/THolder.h"
 
// ROOT include(s).
#include <TError.h>
 
namespace xAOD::Experimental {
 
RObjectManager::RObjectManager(ROOT::RNTupleView<void> field,
                               const ::Long64_t& entry,
                               std::unique_ptr<THolder> holder)
    : IObjectManager(std::move(holder)),
      m_field(std::move(field)),
      m_entryToLoad(entry),
      m_entry(-1),
      m_isSet(kTRUE) {}
 
RObjectManager::~RObjectManager() = default;
 
ROOT::RNTupleView<void>& RObjectManager::field() {
 
  return m_field;
}
 
const ROOT::RNTupleView<void>& RObjectManager::field() const {
 
  return m_field;
}

::Int_t RObjectManager::getEntry(::Int_t) {
 
  // Must be valid entry value
  if (m_entryToLoad.get() < 0) {
    // Raise error as a negative entry is incorrect
    Error("xAOD::RObjectManager::getEntry",
          XAOD_MESSAGE(
              "Entry to read must be larger than or equal to 0. entry=%lld"),
          m_entryToLoad.get());
    return -1;
  }
 
  // Check if anything needs to be done:
  if (m_entryToLoad == m_entry) {
    return 0;
  }
 
  // Load the entry.
  m_field(m_entryToLoad);
 
  // If successful, save entry number
  m_entry = m_entryToLoad;
 
  // We don't know how to get the number of bytes read, so we just return 1.
  return 1;
}

const void* RObjectManager::object() const {
 
  return holder()->get();
}
 
void* RObjectManager::object() {
 
  return holder()->get();
}

void RObjectManager::setObject(void* obj) {
 
  holder()->set(obj);
  m_isSet = kTRUE;
  return;
}

::Bool_t RObjectManager::create() {
 
  return m_isSet;
}

::Bool_t RObjectManager::isSet() const {
 
  return m_isSet;
}

void RObjectManager::reset() {
 
  m_isSet = kFALSE;
  return;
}
 
}  // namespace xAOD::Experimental