Processor specialization for vertically combined (chained) RNTupleProcessors.

Definition at line 483 of file RNTupleProcessor.hxx.

Private Member Functions
	RNTupleChainProcessor (std::vector< std::unique_ptr< RNTupleProcessor > > processors, std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > model)
	Construct a new RNTupleChainProcessor.

ROOT::NTupleSize_t	GetNEntries () final
	Get the total number of entries in this processor.

ROOT::NTupleSize_t	LoadEntry (ROOT::NTupleSize_t entryNumber) final
	Load the entry identified by the provided (global) entry number (i.e., considering all RNTuples in this processor).

void	SetEntryPointers (const ROOT::REntry &) final

Private Attributes
std::vector< ROOT::NTupleSize_t >	fInnerNEntries

std::vector< std::unique_ptr< RNTupleProcessor > >	fInnerProcessors

Friends
class	RNTupleProcessor

Additional Inherited Members
Public Member Functions inherited from ROOT::Experimental::RNTupleProcessor
	RNTupleProcessor (const RNTupleProcessor &)=delete

	RNTupleProcessor (RNTupleProcessor &&)=delete

virtual	~RNTupleProcessor ()=default

RIterator	begin ()

RIterator	end ()

ROOT::NTupleSize_t	GetCurrentEntryNumber () const
	Get the entry number that is currently being processed.

std::size_t	GetCurrentProcessorNumber () const
	Get the number of the inner processor currently being read.

const ROOT::REntry &	GetEntry () const
	Get a reference to the entry used by the processor.

const ROOT::RNTupleModel &	GetModel () const
	Get the model used by the processor.

ROOT::NTupleSize_t	GetNEntriesProcessed () const
	Get the total number of entries processed so far.

const std::string &	GetProcessorName () const
	Get the name of the processor.

RNTupleProcessor &	operator= (const RNTupleProcessor &)=delete

RNTupleProcessor &	operator= (RNTupleProcessor &&)=delete

Static Public Member Functions inherited from ROOT::Experimental::RNTupleProcessor
static std::unique_ptr< RNTupleProcessor >	Create (RNTupleOpenSpec ntuple, std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a single RNTuple.

static std::unique_ptr< RNTupleProcessor >	Create (RNTupleOpenSpec ntuple, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a single RNTuple.

static std::unique_ptr< RNTupleProcessor >	CreateChain (std::vector< RNTupleOpenSpec > ntuples, std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a chain (i.e., a vertical combination) of RNTuples.

static std::unique_ptr< RNTupleProcessor >	CreateChain (std::vector< RNTupleOpenSpec > ntuples, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a chain (i.e., a vertical combination) of RNTuples.

static std::unique_ptr< RNTupleProcessor >	CreateChain (std::vector< std::unique_ptr< RNTupleProcessor > > innerProcessors, std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a chain (i.e., a vertical combination) of other RNTupleProcessors.

static std::unique_ptr< RNTupleProcessor >	CreateChain (std::vector< std::unique_ptr< RNTupleProcessor > > innerProcessors, std::unique_ptr< ROOT::RNTupleModel > model=nullptr)
	Create an RNTupleProcessor for a chain (i.e., a vertical combination) of other RNTupleProcessors.

static std::unique_ptr< RNTupleProcessor >	CreateJoin (const RNTupleOpenSpec &primaryNTuple, const std::vector< RNTupleOpenSpec > &auxNTuples, const std::vector< std::string > &joinFields, std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > primaryModel=nullptr, std::vector< std::unique_ptr< ROOT::RNTupleModel > > auxModels={})
	Create an RNTupleProcessor for a join (i.e., a horizontal combination) of RNTuples.

static std::unique_ptr< RNTupleProcessor >	CreateJoin (const RNTupleOpenSpec &primaryNTuple, const std::vector< RNTupleOpenSpec > &auxNTuples, const std::vector< std::string > &joinFields, std::unique_ptr< ROOT::RNTupleModel > primaryModel=nullptr, std::vector< std::unique_ptr< ROOT::RNTupleModel > > auxModels={})
	Create an RNTupleProcessor for a join (i.e., a horizontal combination) of RNTuples.

Protected Member Functions inherited from ROOT::Experimental::RNTupleProcessor
	RNTupleProcessor (std::string_view processorName, std::unique_ptr< ROOT::RNTupleModel > model)
	Create a new base RNTupleProcessor.

void	ConnectField (RFieldContext &fieldContext, ROOT::Internal::RPageSource &pageSource, ROOT::REntry &entry)
	Create and connect a concrete field to the current page source, based on its proto field.

Protected Attributes inherited from ROOT::Experimental::RNTupleProcessor
ROOT::NTupleSize_t	fCurrentEntryNumber = 0

std::size_t	fCurrentProcessorNumber = 0

std::unique_ptr< ROOT::REntry >	fEntry

std::unordered_map< std::string, RFieldContext >	fFieldContexts
	Maps the (qualified) field name to its corresponding field context.

std::unique_ptr< ROOT::RNTupleModel >	fModel

ROOT::NTupleSize_t	fNEntries = kInvalidNTupleIndex
	Total number of entries.

ROOT::NTupleSize_t	fNEntriesProcessed = 0

std::vector< RNTupleOpenSpec >	fNTuples

std::unique_ptr< ROOT::Internal::RPageSource >	fPageSource

std::string	fProcessorName

#include <ROOT/RNTupleProcessor.hxx>

Inheritance diagram for ROOT::Experimental::RNTupleChainProcessor:

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Constructor & Destructor Documentation

◆ RNTupleChainProcessor()

ROOT::Experimental::RNTupleChainProcessor::RNTupleChainProcessor	(	std::vector< std::unique_ptr< RNTupleProcessor > >	processors,
		std::string_view	processorName,
		std::unique_ptr< ROOT::RNTupleModel >	model )

private

Construct a new RNTupleChainProcessor.

Parameters

[in]	ntuples	The source specification (name and storage location) for each RNTuple to process.
[in]	processorName	Name of the processor. Unless specified otherwise in RNTupleProcessor::CreateChain, this is the name of the first inner processor.
[in]	model	The model that specifies which fields should be read by the processor. The pointer returned by RNTupleModel::MakeField can be used to access a field's value during the processor iteration. When no model is specified, it is created from the descriptor of the first RNTuple specified in `ntuples`.