Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N > Struct Template Reference

Common base for Traits dealing with Histogram conversions to Root Provides generic implementation for creating the histogram and filling meta data The filling (method fill) is not implemented. More...

#include </builds/gaudi/Gaudi/GaudiKernel/include/Gaudi/Histograming/Sink/Utils.h>

Inheritance diagram for Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >:

Static Public Member Functions
template<typename AxisArray, std::size_t... index>
static RootHisto	create (std::string &name, std::string &title, AxisArray axis, std::index_sequence< index... >)
template<typename... Axis>
static RootHisto	create (std::string &name, std::string &title, Axis &... axis)
static void	fillMetaData (RootHisto &histo, nlohmann::json const &jsonAxis, unsigned int nentries)

Static Public Attributes
static constexpr unsigned int	Dimension { N }

Detailed Description

template<typename RootHisto, unsigned int N>
struct Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >

Common base for Traits dealing with Histogram conversions to Root Provides generic implementation for creating the histogram and filling meta data The filling (method fill) is not implemented.

Definition at line 256 of file Utils.h.

Member Function Documentation

create() [1/2]

template<typename RootHisto, unsigned int N>

template<typename... Axis>

RootHisto Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >::create ( std::string & name, std::string & title, Axis &... axis )

inlinestatic

Definition at line 268 of file Utils.h.

                                                                                  {
        return create( name, title, std::make_tuple( axis... ), std::make_index_sequence<sizeof...( Axis )>() );
      }

create() [2/2]

template<typename RootHisto, unsigned int N>

template<typename AxisArray, std::size_t... index>

RootHisto Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >::create ( std::string & name, std::string & title, AxisArray axis, std::index_sequence< index... >  )

inlinestatic

Definition at line 260 of file Utils.h.

                                                                                                                {
        return std::make_from_tuple<RootHisto>(
            std::tuple_cat( std::tuple{ name.c_str(), title.c_str() },
                            std::tuple{ std::get<index>( axis ).nBins, std::get<index>( axis ).minValue,
                                        std::get<index>( axis ).maxValue }... ) );
      }

fillMetaData()

template<typename RootHisto, unsigned int N>

void Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >::fillMetaData ( RootHisto & histo, nlohmann::json const & jsonAxis, unsigned int nentries )

inlinestatic

Definition at line 272 of file Utils.h.

                                                                                                        {
        auto try_set_bin_labels = [&histo, &jsonAxis]( auto idx ) {
          TAxis* axis = nullptr;
          switch ( idx ) {
          case 0:
            axis = histo.GetXaxis();
            break;
          case 1:
            axis = histo.GetYaxis();
            break;
          case 2:
            axis = histo.GetZaxis();
            break;
          default:
            break;
          }
          if ( axis && jsonAxis[idx].contains( "labels" ) ) {
            const auto labels = jsonAxis[idx].at( "labels" );
            for ( unsigned int i = 0; i < labels.size(); i++ ) {
              axis->SetBinLabel( i + 1, labels[i].template get<std::string>().c_str() );
            }
          }
          if ( axis && jsonAxis[idx].contains( "xbins" ) ) {
            const auto xbins = jsonAxis[idx].at( "xbins" );
            axis->Set( xbins.size() - 1, xbins.template get<std::vector<double>>().data() );
          }
        };
        for ( unsigned int i = 0; i < jsonAxis.size(); i++ ) try_set_bin_labels( i );
        // Fix the number of entries, wrongly computed by ROOT from the numer of calls to fill
        histo.SetEntries( nentries );
      }

Member Data Documentation

Dimension

template<typename RootHisto, unsigned int N>

unsigned int Gaudi::Histograming::Sink::details::TraitsBase< RootHisto, N >::Dimension { N }

staticconstexpr

Definition at line 257 of file Utils.h.

{ N };

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The documentation for this struct was generated from the following file:

• GaudiKernel/include/Gaudi/Histograming/Sink/Utils.h