JROOT::JDataFrame::JBuffer< T > Struct Template Reference

Auxiliary buffer for parsing data from ROOT data frame. More...

#include <JDataFrame.hh>

Inheritance diagram for JROOT::JDataFrame::JBuffer< T >:

Classes
struct	JOutput_t
	Template implementation for output. More...

Public Member Functions
	JBuffer ()
	Default constructor.
size_t	operator() (ROOT::RDataFrame &in, const range_type &range)
	Parse data.

Private Attributes
TClass *	cs = NULL

Detailed Description

template<class T>
struct JROOT::JDataFrame::JBuffer< T >

Auxiliary buffer for parsing data from ROOT data frame.

Definition at line 189 of file JDataFrame.hh.

Constructor & Destructor Documentation

JBuffer()

template<class T >

JROOT::JDataFrame::JBuffer< T >::JBuffer ( )

inline

Default constructor.

Definition at line 195 of file JDataFrame.hh.

                :
        cs(TClass::GetClass<T>())
      {
        if (!cs) {
          THROW(JException, "Data type not defined via ROOT TClass.");
        }
      }

Member Function Documentation

operator()()

template<class T >

size_t JROOT::JDataFrame::JBuffer< T >::operator() ( ROOT::RDataFrame & in, const range_type & range )

inline

Parse data.

Parameters

in	input
range	range

Returns

number of entries parsed

Definition at line 211 of file JDataFrame.hh.

      {
        size_t N = range.getUpperLimit() - range.getLowerLimit();
 
        if (N != 0) {
 
          this->resize(N);
 
          for (const std::string& column : in.GetColumnNames()) {
 
            TDataMember* ps = cs->GetDataMember(column.c_str());
 
            if (ps != NULL && JDictionary::getInstance().count(ps->GetTypeName()) != 0) {
 
              JOutput_t out(*this, ps->GetOffset());
 
              N = std::min(N, JDictionary::getInstance()[ps->GetTypeName()]->parse(in, column.c_str(), range, out));
 
            } else {
 
              THROW(JException, "Data type not implemented for column " << column);
            }
          }
        }
 
        return N;
      }

Member Data Documentation

cs

template<class T >

TClass* JROOT::JDataFrame::JBuffer< T >::cs = NULL

private

Definition at line 241 of file JDataFrame.hh.

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

• JDataFrame.hh