DataObjID.cpp

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#include "GaudiKernel/DataObjID.h"
#include "GaudiKernel/Bootstrap.h"
#include "GaudiKernel/IClassIDSvc.h"
#include "GaudiKernel/ISvcLocator.h"
#include <functional>

IClassIDSvc* DataObjID::p_clidSvc(nullptr);
std::once_flag DataObjID::m_ip;

void
DataObjID::hashGen() {

  if (m_clid == 0) {
    m_hash = (std::hash<std::string>()(m_key));
  } else {
    // this is a bit redundant since hash<int> is a pass-through
    m_hash = (std::hash<std::string>()(m_key)) ^ (std::hash<CLID>()(m_clid) << 1);
  }

}

void
DataObjID::getClidSvc() {
  p_clidSvc = Gaudi::svcLocator()->service<IClassIDSvc>("ClassIDSvc").get();
}


void
DataObjID::setClid() {
  
  std::call_once( m_ip, &DataObjID::getClidSvc );

  if (p_clidSvc == nullptr || p_clidSvc->getIDOfTypeName(m_className, m_clid).isFailure()) {
    m_clid = 0;
    m_className = "UNKNOWN_CLASS:" + m_className;
  }

}


void
DataObjID::setClassName() {
  
  std::call_once( m_ip, &DataObjID::getClidSvc );

  if (p_clidSvc == nullptr || p_clidSvc->getTypeNameOfID(m_clid, m_className).isFailure()) {
    m_className = "UNKNOW_CLID:" + std::to_string(m_clid);
  }

}


std::ostream&
operator<< (std::ostream& str, const DataObjID& d) {
  if (d.m_clid == 0 && d.m_className == "") {
    str << "('" << d.m_key << "')";
  } else {
    str << "('" << d.m_className << "','" << d.m_key << "')";
  }
  return str;
}

std::string
DataObjID::fullKey() const {
  if (m_clid == 0 && m_className == "") {
    return m_key;
  } else {
    return ( m_className + "/" + m_key );
  }
}