The REntry is a collection of values in an ntuple corresponding to a complete row in the data set.

The entry provides a memory-managed binder for a set of values read from fields in an RNTuple. The memory locations that are associated with values are managed through shared pointers.

Definition at line 54 of file REntry.hxx.

Public Types
using	ConstIterator_t = decltype(fValues)::const_iterator

Public Member Functions
	REntry (const REntry &other)=delete

	REntry (REntry &&other)=default

	~REntry ()=default

ConstIterator_t	begin () const

template<typename T >
void	BindRawPtr (ROOT::RFieldToken token, T *rawPtr)

template<typename T >
void	BindRawPtr (std::string_view fieldName, T *rawPtr)

template<typename T >
void	BindValue (ROOT::RFieldToken token, std::shared_ptr< T > objPtr)

template<typename T >
void	BindValue (std::string_view fieldName, std::shared_ptr< T > objPtr)

void	EmplaceNewValue (ROOT::RFieldToken token)

void	EmplaceNewValue (std::string_view fieldName)

ConstIterator_t	end () const

std::uint64_t	GetModelId () const

template<typename T >
std::shared_ptr< T >	GetPtr (ROOT::RFieldToken token) const

template<typename T >
std::shared_ptr< T >	GetPtr (std::string_view fieldName) const

std::uint64_t	GetSchemaId () const

ROOT::RFieldToken	GetToken (std::string_view fieldName) const
	The ordinal of the (sub)field fieldName; can be used in other methods to address the corresponding value.

const std::string &	GetTypeName (ROOT::RFieldToken token) const

const std::string &	GetTypeName (std::string_view fieldName) const

REntry &	operator= (const REntry &other)=delete

REntry &	operator= (REntry &&other)=default

Private Member Functions
	REntry ()=default
	Creation of entries can be done by the RNTupleModel, the RNTupleReader, or the RNTupleWriter.

	REntry (std::uint64_t modelId, std::uint64_t schemaId)

template<typename T >
std::shared_ptr< T >	AddValue (ROOT::RField< T > &field)
	While building the entry, adds a new value for the field and returns the value's shared pointer.

void	AddValue (ROOT::RFieldBase::RValue &&value)

std::size_t	Append ()

void	EnsureMatchingModel (ROOT::RFieldToken token) const

template<typename T >
void	EnsureMatchingType (ROOT::RFieldToken token) const

const std::string &	FindFieldName (ROOT::RFieldToken token) const
	This function has linear complexity, only use it for more helpful error messages!

void	Read (ROOT::NTupleSize_t index)

Private Attributes
std::unordered_map< std::string, std::size_t >	fFieldName2Token
	For fast lookup of token IDs given a (sub)field name present in the entry.

std::vector< std::string >	fFieldTypes
	To ensure that the entry is standalone, a copy of all field types.

std::uint64_t	fModelId = 0
	The entry must be linked to a specific model, identified by a model ID.

std::uint64_t	fSchemaId = 0
	The entry and its tokens are also linked to a specific schema, identified by a schema ID.

std::vector< ROOT::RFieldBase::RValue >	fValues
	Corresponds to the fields of the linked model.

Friends
class	Experimental::RNTupleChainProcessor

class	Experimental::RNTupleFillContext

class	Experimental::RNTupleJoinProcessor

class	Experimental::RNTupleProcessor

class	Experimental::RNTupleSingleProcessor

class	RNTupleModel

class	RNTupleReader

#include <ROOT/REntry.hxx>

Member Typedef Documentation

◆ ConstIterator_t

using ROOT::REntry::ConstIterator_t = decltype(fValues)::const_iterator

Definition at line 146 of file REntry.hxx.

Constructor & Destructor Documentation

◆ REntry() [1/4]

ROOT::REntry::REntry ( )

privatedefault

Creation of entries can be done by the RNTupleModel, the RNTupleReader, or the RNTupleWriter.

◆ REntry() [2/4]

ROOT::REntry::REntry	(	std::uint64_t	modelId,
		std::uint64_t	schemaId )

inlineexplicitprivate

Definition at line 77 of file REntry.hxx.

◆ REntry() [3/4]

ROOT::REntry::REntry ( const REntry & other )

delete

◆ REntry() [4/4]

ROOT::REntry::REntry ( REntry && other )

default

◆ ~REntry()

ROOT::REntry::~REntry ( )

default

Member Function Documentation

◆ AddValue() [1/2]

template<typename T >

std::shared_ptr< T > ROOT::REntry::AddValue ( ROOT::RField< T > & field )

inlineprivate

While building the entry, adds a new value for the field and returns the value's shared pointer.

Definition at line 88 of file REntry.hxx.

◆ AddValue() [2/2]

void ROOT::REntry::AddValue ( ROOT::RFieldBase::RValue && value )

inlineprivate

Definition at line 79 of file REntry.hxx.

◆ Append()

std::size_t ROOT::REntry::Append ( )

inlineprivate

Definition at line 104 of file REntry.hxx.

◆ begin()

ConstIterator_t ROOT::REntry::begin ( ) const

inline

Definition at line 225 of file REntry.hxx.

◆ BindRawPtr() [1/2]

template<typename T >

void ROOT::REntry::BindRawPtr	(	ROOT::RFieldToken	token,
		T *	rawPtr )

inline

Definition at line 187 of file REntry.hxx.

◆ BindRawPtr() [2/2]

template<typename T >

void ROOT::REntry::BindRawPtr	(	std::string_view	fieldName,
		T *	rawPtr )

inline

Definition at line 195 of file REntry.hxx.

◆ BindValue() [1/2]

template<typename T >

void ROOT::REntry::BindValue	(	ROOT::RFieldToken	token,
		std::shared_ptr< T >	objPtr )

inline

Definition at line 173 of file REntry.hxx.

◆ BindValue() [2/2]

template<typename T >

void ROOT::REntry::BindValue	(	std::string_view	fieldName,
		std::shared_ptr< T >	objPtr )

inline

Definition at line 181 of file REntry.hxx.

◆ EmplaceNewValue() [1/2]

void ROOT::REntry::EmplaceNewValue ( ROOT::RFieldToken token )

inline

Definition at line 164 of file REntry.hxx.

◆ EmplaceNewValue() [2/2]

void ROOT::REntry::EmplaceNewValue ( std::string_view fieldName )

inline

Definition at line 170 of file REntry.hxx.

◆ end()

ConstIterator_t ROOT::REntry::end ( ) const

inline

Definition at line 226 of file REntry.hxx.

◆ EnsureMatchingModel()

void ROOT::REntry::EnsureMatchingModel ( ROOT::RFieldToken token ) const

inlineprivate

Definition at line 113 of file REntry.hxx.

◆ EnsureMatchingType()

template<typename T >

void ROOT::REntry::EnsureMatchingType ( ROOT::RFieldToken token ) const

inlineprivate

Definition at line 135 of file REntry.hxx.

◆ FindFieldName()

const std::string & ROOT::REntry::FindFieldName ( ROOT::RFieldToken token ) const

inlineprivate

This function has linear complexity, only use it for more helpful error messages!

Definition at line 122 of file REntry.hxx.

◆ GetModelId()

std::uint64_t ROOT::REntry::GetModelId ( ) const

inline

Definition at line 222 of file REntry.hxx.

◆ GetPtr() [1/2]

template<typename T >

std::shared_ptr< T > ROOT::REntry::GetPtr ( ROOT::RFieldToken token ) const

inline

Definition at line 201 of file REntry.hxx.

◆ GetPtr() [2/2]

template<typename T >

std::shared_ptr< T > ROOT::REntry::GetPtr ( std::string_view fieldName ) const

inline

Definition at line 209 of file REntry.hxx.

◆ GetSchemaId()

std::uint64_t ROOT::REntry::GetSchemaId ( ) const

inline

Definition at line 223 of file REntry.hxx.

◆ GetToken()

ROOT::RFieldToken ROOT::REntry::GetToken ( std::string_view fieldName ) const

inline

The ordinal of the (sub)field fieldName; can be used in other methods to address the corresponding value.

Definition at line 155 of file REntry.hxx.

◆ GetTypeName() [1/2]

const std::string & ROOT::REntry::GetTypeName ( ROOT::RFieldToken token ) const

inline

Definition at line 214 of file REntry.hxx.

◆ GetTypeName() [2/2]

const std::string & ROOT::REntry::GetTypeName ( std::string_view fieldName ) const

inline

Definition at line 220 of file REntry.hxx.

◆ operator=() [1/2]

REntry & ROOT::REntry::operator= ( const REntry & other )

delete

◆ operator=() [2/2]

REntry & ROOT::REntry::operator= ( REntry && other )

default

◆ Read()

void ROOT::REntry::Read ( ROOT::NTupleSize_t index )

inlineprivate

Definition at line 97 of file REntry.hxx.

Friends And Related Symbol Documentation

◆ Experimental::RNTupleChainProcessor

friend class Experimental::RNTupleChainProcessor

friend

Definition at line 60 of file REntry.hxx.

◆ Experimental::RNTupleFillContext

friend class Experimental::RNTupleFillContext

friend

Definition at line 57 of file REntry.hxx.

◆ Experimental::RNTupleJoinProcessor

friend class Experimental::RNTupleJoinProcessor

friend

Definition at line 61 of file REntry.hxx.

◆ Experimental::RNTupleProcessor

friend class Experimental::RNTupleProcessor

friend

Definition at line 58 of file REntry.hxx.

◆ Experimental::RNTupleSingleProcessor

friend class Experimental::RNTupleSingleProcessor

friend

Definition at line 59 of file REntry.hxx.

◆ RNTupleModel

friend class RNTupleModel

friend

Definition at line 55 of file REntry.hxx.

◆ RNTupleReader

friend class RNTupleReader

friend

Definition at line 56 of file REntry.hxx.

Member Data Documentation

◆ fFieldName2Token

std::unordered_map<std::string, std::size_t> ROOT::REntry::fFieldName2Token

private

For fast lookup of token IDs given a (sub)field name present in the entry.

Definition at line 71 of file REntry.hxx.

◆ fFieldTypes

std::vector<std::string> ROOT::REntry::fFieldTypes

private

To ensure that the entry is standalone, a copy of all field types.

Definition at line 73 of file REntry.hxx.

◆ fModelId

std::uint64_t ROOT::REntry::fModelId = 0

private

The entry must be linked to a specific model, identified by a model ID.

Definition at line 65 of file REntry.hxx.

◆ fSchemaId

std::uint64_t ROOT::REntry::fSchemaId = 0

private

The entry and its tokens are also linked to a specific schema, identified by a schema ID.

Definition at line 67 of file REntry.hxx.

◆ fValues

std::vector<ROOT::RFieldBase::RValue> ROOT::REntry::fValues

private

Corresponds to the fields of the linked model.

Definition at line 69 of file REntry.hxx.

Libraries for ROOT::REntry:

[legend]

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

tree/ntuple/inc/ROOT/REntry.hxx

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Friends

Member Typedef Documentation

◆ ConstIterator_t

Constructor & Destructor Documentation

◆ REntry() [1/4]

◆ REntry() [2/4]

◆ REntry() [3/4]

◆ REntry() [4/4]

◆ ~REntry()

Member Function Documentation

◆ AddValue() [1/2]

◆ AddValue() [2/2]

◆ Append()

◆ begin()

◆ BindRawPtr() [1/2]

◆ BindRawPtr() [2/2]

◆ BindValue() [1/2]

◆ BindValue() [2/2]

◆ EmplaceNewValue() [1/2]

◆ EmplaceNewValue() [2/2]

◆ end()

◆ EnsureMatchingModel()

◆ EnsureMatchingType()

◆ FindFieldName()

◆ GetModelId()

◆ GetPtr() [1/2]

◆ GetPtr() [2/2]

◆ GetSchemaId()

◆ GetToken()

◆ GetTypeName() [1/2]

◆ GetTypeName() [2/2]

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ Read()

Friends And Related Symbol Documentation

◆ Experimental::RNTupleChainProcessor

◆ Experimental::RNTupleFillContext

◆ Experimental::RNTupleJoinProcessor

◆ Experimental::RNTupleProcessor

◆ Experimental::RNTupleSingleProcessor

◆ RNTupleModel

◆ RNTupleReader

Member Data Documentation

◆ fFieldName2Token

◆ fFieldTypes

◆ fModelId

◆ fSchemaId

◆ fValues