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. More...

size_t	operator() (ROOT::RDataFrame &in, const range_type &range)
	Parse data. More...

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;
       }