ROOT::RDF::Experimental::RMetaData Class Reference

Class behaving as a heterogenuous dictionary to store the metadata of a dataset.

The supported types of the metadata are: std::string, int and double. An example of creating the RMetaData object:

ROOT::RDF::Experimental::RMetaData meta;
meta.Add("sample_name", "name"");
meta.Add("luminosity", 10064);
meta.Add("xsecs", 1.0);

The RMetaData object is passed to an RSample object which represents a single dataset sample.

A dataframe built with the RMetaData object can be accessed with the DefinePerSample() method.

Definition at line 57 of file RMetaData.hxx.

Public Member Functions
	RMetaData ()
	RMetaData (RMetaData &&)
	RMetaData (RMetaData const &)
	~RMetaData ()
void	Add (const std::string &key, const std::string &val)
	Add an RMetaData class instance.
void	Add (const std::string &key, double val)
	Add an RMetaData class instance.
void	Add (const std::string &key, int val)
	Add an RMetaData class instance.
std::string	Dump (const std::string &key) const
	Dump the value of the metadata value given the key.
double	GetD (const std::string &key) const
	Return the metadata value of type double given the key, or an error if the metadata value is of a non-double type.
double	GetD (const std::string &key, double defaultVal) const
	Return the metadata value of type double given the key, a default double metadata value if the key is not found, or an error if the metadata value is of a non-double type.
int	GetI (const std::string &key) const
	Return the metadata value of type int given the key, or an error if the metadata value is of a non-int type.
int	GetI (const std::string &key, int defaultVal) const
	Return the metadata value of type int given the key, a default int metadata value if the key is not found, or an error if the metadata value is of a non-int type.
std::string	GetS (const std::string &key) const
	Return the metadata value of type string given the key, or an error if the metadata value is of a non-string type.
const std::string	GetS (const std::string &key, const std::string &defaultVal) const
	Return the metadata value of type int given the key, a default int metadata value if the key is not found, or an error if the metadata value is of a non-string type.
RMetaData &	operator= (RMetaData &&)
RMetaData &	operator= (RMetaData const &)

Private Attributes
std::unique_ptr< Internal::RDF::RMetaDataJson >	fJson

Friends
std::string	ROOT::Internal::RDF::ExportJSON (ROOT::RDF::Experimental::RMetaData &)
void	ROOT::Internal::RDF::ImportJSON (ROOT::RDF::Experimental::RMetaData &, const std::string &jsonString)

#include <ROOT/RDF/RMetaData.hxx>

Constructor & Destructor Documentation

RMetaData() [1/3]

ROOT::RDF::Experimental::RMetaData::RMetaData

(

)

Definition at line 23 of file RMetaData.cxx.

RMetaData() [2/3]

ROOT::RDF::Experimental::RMetaData::RMetaData

(

RMetaData const &

other

)

Definition at line 25 of file RMetaData.cxx.

RMetaData() [3/3]

ROOT::RDF::Experimental::RMetaData::RMetaData ( RMetaData && )

default

~RMetaData()

ROOT::RDF::Experimental::RMetaData::~RMetaData ( )

default

Member Function Documentation

Add() [1/3]

void ROOT::RDF::Experimental::RMetaData::Add	(	const std::string &	key,
		const std::string &	val )

Add an RMetaData class instance.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	val	metadata value for of type string.

Definition at line 58 of file RMetaData.cxx.

Add() [2/3]

void ROOT::RDF::Experimental::RMetaData::Add	(	const std::string &	key,
		double	val )

Add an RMetaData class instance.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	val	metadata value for a given RMetaData instance of type double.

Definition at line 50 of file RMetaData.cxx.

Add() [3/3]

void ROOT::RDF::Experimental::RMetaData::Add	(	const std::string &	key,
		int	val )

Add an RMetaData class instance.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	val	value for a given RMetaData instance of type int.

Definition at line 42 of file RMetaData.cxx.

Dump()

std::string ROOT::RDF::Experimental::RMetaData::Dump

(

const std::string &

key

)

const

Dump the value of the metadata value given the key.

Parameters

[in]

key

input key for a given RMetaData instance.

Returns

metadata value (as a string) associated with the input key, irrelevant of the actual type of the metadata value.

Definition at line 67 of file RMetaData.cxx.

GetD() [1/2]

double ROOT::RDF::Experimental::RMetaData::GetD

(

const std::string &

key

)

const

Return the metadata value of type double given the key, or an error if the metadata value is of a non-double type.

Parameters

[in]

key

input key for a given RMetaData instance.

Definition at line 84 of file RMetaData.cxx.

GetD() [2/2]

double ROOT::RDF::Experimental::RMetaData::GetD	(	const std::string &	key,
		double	defaultVal ) const

Return the metadata value of type double given the key, a default double metadata value if the key is not found, or an error if the metadata value is of a non-double type.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	defaultVal	metadata value of type double which is read as default while a given key cannot be found in the dataset.

Definition at line 122 of file RMetaData.cxx.

GetI() [1/2]

int ROOT::RDF::Experimental::RMetaData::GetI

(

const std::string &

key

)

const

Return the metadata value of type int given the key, or an error if the metadata value is of a non-int type.

Parameters

[in]

key

input key for a given RMetaData instance.

Definition at line 73 of file RMetaData.cxx.

GetI() [2/2]

int ROOT::RDF::Experimental::RMetaData::GetI	(	const std::string &	key,
		int	defaultVal ) const

Return the metadata value of type int given the key, a default int metadata value if the key is not found, or an error if the metadata value is of a non-int type.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	defaultVal	metadata value of type int which is read as default while a given key cannot be found in the dataset.

Definition at line 109 of file RMetaData.cxx.

GetS() [1/2]

std::string ROOT::RDF::Experimental::RMetaData::GetS

(

const std::string &

key

)

const

Return the metadata value of type string given the key, or an error if the metadata value is of a non-string type.

Parameters

[in]

key

input key for a given RMetaData instance.

Definition at line 96 of file RMetaData.cxx.

GetS() [2/2]

const std::string ROOT::RDF::Experimental::RMetaData::GetS	(	const std::string &	key,
		const std::string &	defaultVal ) const

Return the metadata value of type int given the key, a default int metadata value if the key is not found, or an error if the metadata value is of a non-string type.

Parameters

[in]	key	input key for a given RMetaData instance.
[in]	defaultVal	metadata value of type string which is read as default while a given key cannot be found in the dataset.

Definition at line 136 of file RMetaData.cxx.

operator=() [1/2]

RMetaData & ROOT::RDF::Experimental::RMetaData::operator= ( RMetaData && )

default

operator=() [2/2]

RMetaData & ROOT::RDF::Experimental::RMetaData::operator=

(

RMetaData const &

other

)

Definition at line 29 of file RMetaData.cxx.

Friends And Related Symbol Documentation

ROOT::Internal::RDF::ExportJSON

std::string ROOT::Internal::RDF::ExportJSON ( ROOT::RDF::Experimental::RMetaData & )

friend

ROOT::Internal::RDF::ImportJSON

void ROOT::Internal::RDF::ImportJSON ( ROOT::RDF::Experimental::RMetaData & , const std::string & jsonString )

friend

Member Data Documentation

fJson

std::unique_ptr<Internal::RDF::RMetaDataJson> ROOT::RDF::Experimental::RMetaData::fJson

private

Definition at line 85 of file RMetaData.hxx.

Libraries for ROOT::RDF::Experimental::RMetaData:

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

• tree/dataframe/inc/ROOT/RDF/RMetaData.hxx
• tree/dataframe/src/RMetaData.cxx