The container field for a tree model, which itself has no physical representation.

Definition at line 225 of file RField.hxx.

Public Member Functions
	RFieldRoot ()

Detail::RFieldValue	CaptureValue (void *) final
	Creates a value from a memory location with an already constructed object. More...

RFieldBase *	Clone (std::string_view newName)

void	DoGenerateColumns () final
	Creates the backing columns corresponsing to the field type and name. More...

REntry *	GenerateEntry ()
	Generates managed values for the top-level sub fields. More...

Detail::RFieldValue	GenerateValue (void *)
	Generates a tree value in a given location of size at least GetValueSize(). More...

unsigned int	GetNColumns () const final
	Returns the number of columns generated to store data for the field; defaults to 1. More...

size_t	GetValueSize () const final
	The number of bytes taken by a value of the appropriate type. More...

Public Member Functions inherited from ROOT::Experimental::Detail::RFieldBase
	RFieldBase (const RFieldBase &)=delete

	RFieldBase (RFieldBase &&)=default

	RFieldBase (std::string_view name, std::string_view type, ENTupleStructure structure, bool isSimple)
	The constructor creates the underlying column objects and connects them to either a sink or a source. More...

virtual	~RFieldBase ()

void	Append (const RFieldValue &value)
	Write the given value into columns. The value object has to be of the same type as the field. More...

void	Attach (std::unique_ptr< Detail::RFieldBase > child)

RIterator	begin ()

virtual RFieldValue	CaptureValue (void *where)=0
	Creates a value from a memory location with an already constructed object. More...

virtual RFieldBase *	Clone (std::string_view newName)=0

virtual void	CommitCluster ()
	Perform housekeeping tasks for global to cluster-local index translation. More...

void	ConnectColumns (Detail::RPageStorage *pageStorage)
	Registeres (or re-registers) the backing columns with the physical storage. More...

virtual void	DestroyValue (const RFieldValue &value, bool dtorOnly=false)
	Releases the resources acquired during GenerateValue (memory and constructor) This implementation works for simple types but needs to be overwritten for complex ones. More...

RIterator	end ()

void	Flush () const
	Ensure that all received items are written from page buffers to the storage. More...

RFieldValue	GenerateValue ()
	Generates a tree value of the field type and allocates new initialized memory according to the type. More...

virtual RFieldValue	GenerateValue (void *where)=0
	Generates a tree value in a given location of size at least GetValueSize(). More...

virtual RNTupleVersion	GetFieldVersion () const
	Indicates an evolution of the mapping scheme from C++ type to columns. More...

std::string	GetName () const

virtual unsigned int	GetNColumns () const =0
	Returns the number of columns generated to store data for the field; defaults to 1. More...

NTupleSize_t	GetNItems ()
	The number of elements in the principal column. For top level fields, the number of entries. More...

const RFieldBase *	GetParent () const

ENTupleStructure	GetStructure () const

std::string	GetType () const

virtual RNTupleVersion	GetTypeVersion () const
	Indicates an evolution of the C++ type itself. More...

virtual size_t	GetValueSize () const =0
	The number of bytes taken by a value of the appropriate type. More...

bool	IsSimple () const

RFieldBase &	operator= (const RFieldBase &)=delete

RFieldBase &	operator= (RFieldBase &&)=default

void	Read (NTupleSize_t index, RFieldValue *value)
	Populate a single value with data from the tree, which needs to be of the fitting type. More...

void	ReadV (NTupleSize_t index, NTupleSize_t count, void *dst)
	Type unsafe bulk read interface; dst must point to a vector of objects of the field type. More...

Additional Inherited Members
Static Public Member Functions inherited from ROOT::Experimental::Detail::RFieldBase
static RFieldBase *	Create (const std::string &fieldName, const std::string &typeName)
	Factory method to resurrect a field from the stored on-disk type information. More...

static std::string	GetCollectionName (const std::string &parentName)
	Get the name for an item sub field that is part of a collection, e.g. the float field of std::vector<float> More...

static std::string	GetLeafName (const std::string &fullName)
	Get the tail of the field name up to the last dot. More...

Static Public Attributes inherited from ROOT::Experimental::Detail::RFieldBase
static constexpr char	kCollectionSeparator = '/'
	Field names convey the level of subfields; sub fields (nested collections) are separated by a dot. More...

Protected Member Functions inherited from ROOT::Experimental::Detail::RFieldBase
virtual void	DoAppend (const RFieldValue &value)
	Operations on values of complex types, e.g. More...

virtual void	DoGenerateColumns ()=0
	Creates the backing columns corresponsing to the field type and name. More...

virtual void	DoRead (NTupleSize_t index, RFieldValue *value)

virtual void	DoReadV (NTupleSize_t index, NTupleSize_t count, void *dst)

Protected Attributes inherited from ROOT::Experimental::Detail::RFieldBase
std::vector< std::unique_ptr< RColumn > >	fColumns
	The columns are connected either to a sink or to a source (not to both); they are owned by the field. More...

RFieldBase *	fParent
	Sub fields point to their mother field. More...

RColumn *	fPrincipalColumn
	All fields have a main column. For collection fields, the main column is the index field. Points into fColumns. More...

std::vector< std::unique_ptr< RFieldBase > >	fSubFields
	Collections and classes own sub fields. More...

#include <ROOT/RField.hxx>

Inheritance diagram for ROOT::Experimental::RFieldRoot:

[legend]

Constructor & Destructor Documentation

◆ RFieldRoot()

ROOT::Experimental::RFieldRoot::RFieldRoot ( )

inline

Definition at line 227 of file RField.hxx.

Member Function Documentation

◆ CaptureValue()

Detail::RFieldValue ROOT::Experimental::RFieldRoot::CaptureValue ( void * where )

inlinefinalvirtual

Creates a value from a memory location with an already constructed object.

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 234 of file RField.hxx.

◆ Clone()

ROOT::Experimental::Detail::RFieldBase * ROOT::Experimental::RFieldRoot::Clone ( std::string_view newName )

virtual

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 203 of file RField.cxx.

◆ DoGenerateColumns()

void ROOT::Experimental::RFieldRoot::DoGenerateColumns ( )

inlinefinalvirtual

Creates the backing columns corresponsing to the field type and name.

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 230 of file RField.hxx.

◆ GenerateEntry()

ROOT::Experimental::REntry * ROOT::Experimental::RFieldRoot::GenerateEntry ( )

Generates managed values for the top-level sub fields.

Definition at line 214 of file RField.cxx.

◆ GenerateValue()

Detail::RFieldValue ROOT::Experimental::RFieldRoot::GenerateValue ( void * where )

inlinevirtual

Generates a tree value in a given location of size at least GetValueSize().

Assumes that where has been allocated by malloc().

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 233 of file RField.hxx.

◆ GetNColumns()

unsigned int ROOT::Experimental::RFieldRoot::GetNColumns ( ) const

inlinefinalvirtual

Returns the number of columns generated to store data for the field; defaults to 1.

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 231 of file RField.hxx.

◆ GetValueSize()

size_t ROOT::Experimental::RFieldRoot::GetValueSize ( ) const

inlinefinalvirtual

The number of bytes taken by a value of the appropriate type.

Implements ROOT::Experimental::Detail::RFieldBase.

Definition at line 235 of file RField.hxx.

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

tree/ntuple/v7/inc/ROOT/RField.hxx
tree/ntuple/v7/src/RField.cxx

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ RFieldRoot()

Member Function Documentation

◆ CaptureValue()

◆ Clone()

◆ DoGenerateColumns()

◆ GenerateEntry()

◆ GenerateValue()

◆ GetNColumns()

◆ GetValueSize()