ROOT::RFieldBase::RColumnRepresentations Class Reference

Some fields have multiple possible column representations, e.g.

with or without split encoding. All column representations supported for writing also need to be supported for reading. In addition, fields can support extra column representations for reading only, e.g. a 64bit integer reading from a 32bit column. The defined column representations must be supported by corresponding column packing/unpacking implementations, i.e. for the example above, the unpacking of 32bit ints to 64bit pages must be implemented in RColumnElement.hxx

Definition at line 178 of file RFieldBase.hxx.

Public Types
using	Selection_t = std::vector<ColumnRepresentation_t>
	A list of column representations.

Public Member Functions
	RColumnRepresentations ()
	RColumnRepresentations (const Selection_t &serializationTypes, const Selection_t &deserializationExtraTypes)
const Selection_t &	GetDeserializationTypes () const
const ColumnRepresentation_t &	GetSerializationDefault () const
	The first column list from fSerializationTypes is the default for writing.
const Selection_t &	GetSerializationTypes () const

Private Attributes
Selection_t	fDeserializationTypes
	The union of the serialization types and the deserialization extra types.
Selection_t	fSerializationTypes

#include <ROOT/RFieldBase.hxx>

Member Typedef Documentation

Selection_t

using ROOT::RFieldBase::RColumnRepresentations::Selection_t = std::vector<ColumnRepresentation_t>

A list of column representations.

Definition at line 181 of file RFieldBase.hxx.

Constructor & Destructor Documentation

RColumnRepresentations() [1/2]

ROOT::RFieldBase::RColumnRepresentations::RColumnRepresentations

(

)

Definition at line 99 of file RFieldBase.cxx.

RColumnRepresentations() [2/2]

ROOT::RFieldBase::RColumnRepresentations::RColumnRepresentations	(	const Selection_t &	serializationTypes,
		const Selection_t &	deserializationExtraTypes )

Definition at line 106 of file RFieldBase.cxx.

Member Function Documentation

GetDeserializationTypes()

const Selection_t & ROOT::RFieldBase::RColumnRepresentations::GetDeserializationTypes ( ) const

inline

Definition at line 189 of file RFieldBase.hxx.

GetSerializationDefault()

const ColumnRepresentation_t & ROOT::RFieldBase::RColumnRepresentations::GetSerializationDefault ( ) const

inline

The first column list from fSerializationTypes is the default for writing.

Definition at line 187 of file RFieldBase.hxx.

GetSerializationTypes()

const Selection_t & ROOT::RFieldBase::RColumnRepresentations::GetSerializationTypes ( ) const

inline

Definition at line 188 of file RFieldBase.hxx.

Member Data Documentation

fDeserializationTypes

Selection_t ROOT::RFieldBase::RColumnRepresentations::fDeserializationTypes

private

The union of the serialization types and the deserialization extra types.

Duplicates the serialization types list but the benefit is that GetDeserializationTypes does not need to compile the list.

Definition at line 195 of file RFieldBase.hxx.

fSerializationTypes

Selection_t ROOT::RFieldBase::RColumnRepresentations::fSerializationTypes

private

Definition at line 192 of file RFieldBase.hxx.

Libraries for ROOT::RFieldBase::RColumnRepresentations:

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

• tree/ntuple/v7/inc/ROOT/RFieldBase.hxx
• tree/ntuple/v7/src/RFieldBase.cxx