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ROOT::RNTupleCollectionView Class Reference
RNTuple

A view for a collection, that can itself generate new ntuple views for its nested fields.

Definition at line 316 of file RNTupleView.hxx.

Public Member Functions

 RNTupleCollectionView (const RNTupleCollectionView &other)=delete
 RNTupleCollectionView (RNTupleCollectionView &&other)
 ~RNTupleCollectionView ()=default
ROOT::RNTupleLocalRange GetCollectionRange (RNTupleLocalIndex localIndex)
ROOT::RNTupleLocalRange GetCollectionRange (ROOT::NTupleSize_t globalIndex)
RNTupleCollectionView GetCollectionView (std::string_view fieldName)
 Provides access to a collection field, that can itself generate new RNTupleViews for its nested fields.
template<typename T>
RNTupleDirectAccessView< T > GetDirectAccessView (std::string_view fieldName)
 Provides direct access to the I/O buffers of a mappable (sub)field.
template<typename T>
RNTupleView< T > GetView (std::string_view fieldName)
 Provides access to an individual (sub)field.
std::uint64_t operator() (RNTupleLocalIndex localIndex)
std::uint64_t operator() (ROOT::NTupleSize_t globalIndex)
RNTupleCollectionView & operator= (const RNTupleCollectionView &other)=delete
RNTupleCollectionView & operator= (RNTupleCollectionView &&other)

Private Member Functions

 RNTupleCollectionView (ROOT::DescriptorId_t fieldId, const std::string &fieldName, ROOT::Internal::RPageSource *source)
std::uint64_t GetCardinalityValue () const
ROOT::DescriptorId_t GetFieldId (std::string_view fieldName)

Static Private Member Functions

static RNTupleCollectionView Create (ROOT::DescriptorId_t fieldId, ROOT::Internal::RPageSource *source)

Private Attributes

ROOT::RField< RNTupleCardinality< std::uint64_t > > fField
ROOT::Internal::RPageSource * fSource
ROOT::RFieldBase::RValue fValue

Friends

class ROOT::RNTupleReader

#include <ROOT/RNTupleView.hxx>

Constructor & Destructor Documentation

◆ RNTupleCollectionView() [1/3]

ROOT::RNTupleCollectionView::RNTupleCollectionView ( ROOT::DescriptorId_t fieldId,
const std::string & fieldName,
ROOT::Internal::RPageSource * source )
inlineprivate

Definition at line 324 of file RNTupleView.hxx.

◆ RNTupleCollectionView() [2/3]

ROOT::RNTupleCollectionView::RNTupleCollectionView ( const RNTupleCollectionView & other)
delete

◆ RNTupleCollectionView() [3/3]

ROOT::RNTupleCollectionView::RNTupleCollectionView ( RNTupleCollectionView && other)
inline

Definition at line 368 of file RNTupleView.hxx.

◆ ~RNTupleCollectionView()

ROOT::RNTupleCollectionView::~RNTupleCollectionView ( )
default

Member Function Documentation

◆ Create()

RNTupleCollectionView ROOT::RNTupleCollectionView::Create ( ROOT::DescriptorId_t fieldId,
ROOT::Internal::RPageSource * source )
inlinestaticprivate

Definition at line 332 of file RNTupleView.hxx.

◆ GetCardinalityValue()

std::uint64_t ROOT::RNTupleCollectionView::GetCardinalityValue ( ) const
inlineprivate

Definition at line 358 of file RNTupleView.hxx.

◆ GetCollectionRange() [1/2]

ROOT::RNTupleLocalRange ROOT::RNTupleCollectionView::GetCollectionRange ( RNTupleLocalIndex localIndex)
inline

Definition at line 392 of file RNTupleView.hxx.

◆ GetCollectionRange() [2/2]

ROOT::RNTupleLocalRange ROOT::RNTupleCollectionView::GetCollectionRange ( ROOT::NTupleSize_t globalIndex)
inline

Definition at line 383 of file RNTupleView.hxx.

◆ GetCollectionView()

RNTupleCollectionView ROOT::RNTupleCollectionView::GetCollectionView ( std::string_view fieldName)
inline

Provides access to a collection field, that can itself generate new RNTupleViews for its nested fields.

Raises an exception if:

  • there is no field with the given name or,
  • the field is not a collection
See also
ROOT::RNTupleReader::GetCollectionView(std::string_view)

Definition at line 435 of file RNTupleView.hxx.

◆ GetDirectAccessView()

template<typename T>
RNTupleDirectAccessView< T > ROOT::RNTupleCollectionView::GetDirectAccessView ( std::string_view fieldName)
inline

Provides direct access to the I/O buffers of a mappable (sub)field.

Raises an exception if there is no field with the given name. Attempting to access the values of a direct-access view for non-mappable fields will yield compilation errors.

See also
ROOT::RNTupleReader::DirectAccessView(std::string_view)

Definition at line 421 of file RNTupleView.hxx.

◆ GetFieldId()

ROOT::DescriptorId_t ROOT::RNTupleCollectionView::GetFieldId ( std::string_view fieldName)
inlineprivate

Definition at line 347 of file RNTupleView.hxx.

◆ GetView()

template<typename T>
RNTupleView< T > ROOT::RNTupleCollectionView::GetView ( std::string_view fieldName)
inline

Provides access to an individual (sub)field.

Raises an exception if there is no field with the given name.

See also
ROOT::RNTupleReader::GetView(std::string_view)

Definition at line 407 of file RNTupleView.hxx.

◆ operator()() [1/2]

std::uint64_t ROOT::RNTupleCollectionView::operator() ( RNTupleLocalIndex localIndex)
inline
See also
RNTupleView::operator()(RNTupleLocalIndex)

Definition at line 448 of file RNTupleView.hxx.

◆ operator()() [2/2]

std::uint64_t ROOT::RNTupleCollectionView::operator() ( ROOT::NTupleSize_t globalIndex)
inline
See also
RNTupleView::operator()(ROOT::NTupleSize_t)

Definition at line 441 of file RNTupleView.hxx.

◆ operator=() [1/2]

RNTupleCollectionView & ROOT::RNTupleCollectionView::operator= ( const RNTupleCollectionView & other)
delete

◆ operator=() [2/2]

RNTupleCollectionView & ROOT::RNTupleCollectionView::operator= ( RNTupleCollectionView && other)
inline

Definition at line 372 of file RNTupleView.hxx.

◆ ROOT::RNTupleReader

friend class ROOT::RNTupleReader
friend

Definition at line 317 of file RNTupleView.hxx.

Member Data Documentation

◆ fField

ROOT::RField<RNTupleCardinality<std::uint64_t> > ROOT::RNTupleCollectionView::fField
private

Definition at line 321 of file RNTupleView.hxx.

◆ fSource

ROOT::Internal::RPageSource* ROOT::RNTupleCollectionView::fSource
private

Definition at line 320 of file RNTupleView.hxx.

◆ fValue

ROOT::RFieldBase::RValue ROOT::RNTupleCollectionView::fValue
private

Definition at line 322 of file RNTupleView.hxx.

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