/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/FourMomUtils/FourMomUtils/xAODHelpers.h

// xAODHelpers.h
// Header file for xAOD helper functions
// Author: karsten.koeneke@cern.ch
#ifndef FOURMOMUTILS_XAODHELPERS_H
#define FOURMOMUTILS_XAODHELPERS_H

// EDM includes
#include "AthContainers/AuxElement.h"


namespace xAOD
{
  namespace Helpers
  {

    class _importHelper { /* dummy */  };
    
// Define a pre-processor macro for the implementations of all these methods
#define GET_VAL( FUNCNAME, VALTYPE, PERSVALTYPE )                                      \
    inline bool FUNCNAME( const SG::AuxElement& auxEle, const std::string& varName ) { \
      SG::AuxElement::ConstAccessor<PERSVALTYPE> acc(varName);                         \
      return static_cast<VALTYPE>( acc(auxEle) );                                      \
    }

    GET_VAL( getBool,   bool,         char )
    GET_VAL( getInt,    int,          int )
    GET_VAL( getUInt,   unsigned int, unsigned int )
    GET_VAL( getFloat,  float,        float )
    GET_VAL( getDouble, double,       double )



// Define a pre-processor macro for the implementations of all these methods
#define SET_VAL( FUNCNAME, VALTYPE, PERSVALTYPE )                                           \
  inline bool FUNCNAME( SG::AuxElement& auxEle, const std::string& varName, VALTYPE val ) { \
    SG::AuxElement::Accessor<PERSVALTYPE> acc(varName);                                     \
    if ( acc.isAvailable(auxEle) && !(acc.isAvailableWritable(auxEle)) ) {                  \
      return false;                                                                         \
    }                                                                                       \
    acc(auxEle) = static_cast<PERSVALTYPE>(val);                                            \
    return true;                                                                            \
  }

    SET_VAL(setBool,   bool,         char )
    SET_VAL(setInt,    int,          int )
    SET_VAL(setUInt,   unsigned int, unsigned int )
    SET_VAL(setFloat,  float,        float)
    SET_VAL(setDouble, double,       double)



// Define a pre-processor macro for the implementations of all these methods
#define DECO_VAL( FUNCNAME, VALTYPE, PERSVALTYPE )                                                \
  inline bool FUNCNAME( const SG::AuxElement& auxEle, const std::string& varName, VALTYPE val ) { \
    SG::AuxElement::Decorator<PERSVALTYPE> deco(varName);                                         \
    if ( deco.isAvailable(auxEle) && !(deco.isAvailableWritable(auxEle)) ) {                      \
      return false;                                                                               \
    }                                                                                             \
    deco(auxEle) = static_cast<PERSVALTYPE>(val);                                                 \
    return true;                                                                                  \
  }

    SET_VAL(decoBool,   bool,         char )
    SET_VAL(decoInt,    int,          int )
    SET_VAL(decoUInt,   unsigned int, unsigned int )
    SET_VAL(decoFloat,  float,        float)
    SET_VAL(decoDouble, double,       double)

  } //> namespace Helpers

} // End: namespace xAOD


#endif // FOURMOMUTILS_XAODHELPERS_H

---