DataObject.cpp

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/***********************************************************************************\
* (c) Copyright 1998-2026 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
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#include <GaudiKernel/DataObject.h>
#include <GaudiKernel/IInspector.h>
#include <GaudiKernel/IRegistry.h>
#include <GaudiKernel/LinkManager.h>
#include <GaudiKernel/StreamBuffer.h>
#include <boost/io/ios_state.hpp>
#include <memory>
#include <vector>
 
static std::string _sDataObjectCppNotRegistered( "NotRegistered" );

DataObject::DataObject() : m_pLinkMgr{ new LinkManager() } {}

DataObject::DataObject( const DataObject& rhs ) : m_version{ rhs.m_version }, m_pLinkMgr{ new LinkManager() } {}

DataObject& DataObject::operator=( const DataObject& rhs ) {
  m_version = rhs.m_version;
  m_pLinkMgr.reset( new LinkManager() );
  return *this;
}

DataObject::DataObject( DataObject&& rhs )
    : m_version{ std::move( rhs.m_version ) }, m_pLinkMgr{ std::move( rhs.m_pLinkMgr ) } {}

DataObject& DataObject::operator=( DataObject&& rhs ) {
  m_version  = std::move( rhs.m_version );
  m_pLinkMgr = std::move( rhs.m_pLinkMgr );
  return *this;
}

DataObject::~DataObject() {
  // Issue a warning if the object is being deleted and the reference
  // count is non-zero.
  if ( m_refCount > 0 ) {
    // Insert warning here
  }
}

unsigned long DataObject::release() {
  unsigned long cnt = --m_refCount;
  if ( 0 == cnt ) delete this;
  return cnt;
}

unsigned long DataObject::addRef() { return ++m_refCount; }

const CLID& DataObject::clID() const { return CLID_DataObject; }

const CLID& DataObject::classID() { return CLID_DataObject; }

const std::string& DataObject::name() const { return m_pRegistry ? m_pRegistry->name() : _sDataObjectCppNotRegistered; }

StatusCode DataObject::update() { return StatusCode::SUCCESS; }
 
std::ostream& DataObject::fillStream( std::ostream& s ) const {
  boost::io::ios_flags_saver _{ s };
  return s << "DataObject at " << std::hex << this;
}
 
static DataObject*  s_objPtr  = nullptr;
static DataObject** s_currObj = &s_objPtr;
 
static std::vector<DataObject**>& objectStack() {
  static std::unique_ptr<std::vector<DataObject**>> s_current{ new std::vector<DataObject**>() };
  return *s_current;
}
 
DataObject* Gaudi::getCurrentDataObject() { return *s_currObj; }
 
void Gaudi::pushCurrentDataObject( DataObject** pobjAddr ) {
  static std::vector<DataObject**>& c = objectStack();
  c.push_back( pobjAddr );
  s_currObj = pobjAddr ? pobjAddr : &s_objPtr;
}
 
void Gaudi::popCurrentDataObject() {
  static std::vector<DataObject**>& c = objectStack();
  if ( !c.empty() ) c.pop_back();
 
  s_currObj = c.empty() ? &s_objPtr : c.back();
}