SH::MetaObject Class Reference

A class that manages meta-data to be associated with an object. More...

#include <MetaObject.h>

Public Types
enum	CastMode { CAST_ERROR_THROW, CAST_ERROR_DEFAULT, CAST_NOCAST_THROW, CAST_NOCAST_DEFAULT }
	the different modes for casts More...
Public Member Functions
void	testInvariant () const
	test the invariant of this object
	MetaObject ()
	standard constructor
	MetaObject (const MetaObject &that)
	standard copy constructor
virtual	~MetaObject ()
	standard destructor
MetaObject &	operator= (const MetaObject &that)
	standard assignment operator
void	swap (MetaObject &that)
	standard swap
void	remove (const std::string &name)
	remove all meta-information with the given name
void	addReplace (TNamed *meta_swallow)
	add a meta-data object and remove any existing meta-data with the same name
TObject *	get (const std::string &name)
	the meta-data object with the given name
const TObject *	get (const std::string &name) const
double	getDouble (const std::string &name, double def_val=0) const
	the meta-data double with the given name
std::string	getString (const std::string &name, const std::string &def_val="") const
	the meta-data string with the given name
template<class T >
T	castT (const std::string &name, T def_val, CastMode mode) const
	the meta-data element with the given name
double	castDouble (const std::string &name, double def_val=0, CastMode mode=CAST_ERROR_THROW) const
	the meta-data double with the given name
std::string	castString (const std::string &name, const std::string &def_val="", CastMode mode=CAST_ERROR_THROW) const
	the meta-data string with the given name
int	castInteger (const std::string &name, int def_val=0, CastMode mode=CAST_ERROR_THROW) const
	the meta-data integer with the given name
bool	castBool (const std::string &name, bool def_val=false, CastMode mode=CAST_ERROR_THROW) const
	the meta-data boolean with the given name
void	setDouble (const std::string &name, double value)
	set the meta-data double with the given name
void	setString (const std::string &name, const std::string &value)
	set the meta-data string with the given name
void	setInteger (const std::string &name, int value)
	set the meta-data integer with the given name
void	setBool (const std::string &name, bool value)
	set the meta-data boolean with the given name
template<class T >
void	setT (const std::string &name, T value)
	set the meta-data element with the given name
void	fetch (const MetaObject &source)
	fetch the meta-data from the given sample.
void	fetchDefaults (const MetaObject &source)
	fetch the meta-data from the given sample not present in this sample. ignores any meta-data without name.
void	fetchFromString (const std::string &source)
	fetch the meta-data from a given string
std::string	dumpToString ()
	dump the meta-data to a string
virtual void	Add (TObject *meta_swallow)
	add another object to the collection
virtual void	Clear (Option_t *option="")
	clear out the content of the collection
virtual void	Delete (Option_t *option="")
	clear out the content of the collection
virtual Int_t	GetEntries () const
	return the number of entries of this collection
virtual TObject **	GetObjectRef (const TObject *meta) const
	return pointer to pointer of object meta
virtual TIterator *	MakeIterator (Bool_t dir=kIterForward) const
	make a new iterator for this collection
virtual TObject *	Remove (TObject *meta)
	remove the given object from the list

Detailed Description

A class that manages meta-data to be associated with an object.

Originally this was just to be used for meta-data of a sample, but it is now also used for specifying the options for an EventLoop job.

Member Enumeration Documentation

enum SH::MetaObject::CastMode

the different modes for casts

Enumerator:

CAST_ERROR_THROW	cast and throw if the cast fails (not if the input is not found)
CAST_ERROR_DEFAULT	cast and return the default value if the cast fails
CAST_NOCAST_THROW	do not cast and throw if the input has the wrong type (not if the input is not found)
CAST_NOCAST_DEFAULT	cast and return the default value if the input has the wrong type

Constructor & Destructor Documentation

SH::MetaObject::MetaObject ( )

standard constructor

Guarantee: strong

Failures: out of memory I

SH::MetaObject::MetaObject ( const MetaObject & that )

standard copy constructor

Guarantee: strong

Failures: out of memory II

virtual SH::MetaObject::~MetaObject ( ) [virtual]

standard destructor

Guarantee: no-fail

Member Function Documentation

virtual void SH::MetaObject::Add ( TObject * meta_swallow ) [virtual]

add another object to the collection

Precondition:: meta_swallow != 0

Guarantee: basic, argument is always swallowed

Failures: out of memory II

void SH::MetaObject::addReplace ( TNamed * meta_swallow )

add a meta-data object and remove any existing meta-data with the same name

Parameters:

meta_swallow

the meta-object to add

Precondition:: meta_swallow != 0

Guarantee: basic, may delete some entries without adding the new one

Failures: out of memory II

bool SH::MetaObject::castBool	(	const std::string &	name,
		bool	def_val = `false`,
		CastMode	mode = `CAST_ERROR_THROW`
	)			const

the meta-data boolean with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

double SH::MetaObject::castDouble	(	const std::string &	name,
		double	def_val = `0`,
		CastMode	mode = `CAST_ERROR_THROW`
	)			const

the meta-data double with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

int SH::MetaObject::castInteger	(	const std::string &	name,
		int	def_val = `0`,
		CastMode	mode = `CAST_ERROR_THROW`
	)			const

the meta-data integer with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

std::string SH::MetaObject::castString	(	const std::string &	name,
		const std::string &	def_val = `""`,
		CastMode	mode = `CAST_ERROR_THROW`
	)			const

the meta-data string with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

Rationale: I return the string by value, because returning by reference seems to break the python binding.

template<class T >

T SH::MetaObject::castT	(	const std::string &	name,
		T	def_val,
		CastMode	mode
	)			const `[inline]`

the meta-data element with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

virtual void SH::MetaObject::Clear ( Option_t * option = "" ) [virtual]

clear out the content of the collection

Guarantee: no-fail

virtual void SH::MetaObject::Delete ( Option_t * option = "" ) [virtual]

clear out the content of the collection

Guarantee: no-fail

std::string SH::MetaObject::dumpToString ( )

dump the meta-data to a string

string will be suitable for fetchFromString

Guarantee: strong

Failues: no-fail

void SH::MetaObject::fetch ( const MetaObject & source )

fetch the meta-data from the given sample.

fields that have a name that starts with "nc_" are not copied.

Guarantee: basic, may only fetch some meta-data

Failures: out of memory II

Rationale this is used by EventLoop, to copy the: meta-data from the input samples to the output samples. the prefix "nc_" is used to indicate meta-data entries that only apply to the current sample, or are options to the specific EventLoop job.

void SH::MetaObject::fetchDefaults ( const MetaObject & source )

fetch the meta-data from the given sample not present in this sample. ignores any meta-data without name.

Guarantee: basic, may only fetch some meta-data

Failures: out of memory II

void SH::MetaObject::fetchFromString ( const std::string & source )

fetch the meta-data from a given string

individual pieces of data may be given as key=value, key='value', key="value" spurious spaces will be ignored, commas inside values are not allowed

Guarantee: weak, may throw runtime exceptions if string cannot be parsed

Failures: malformed input

TObject* SH::MetaObject::get ( const std::string & name )

the meta-data object with the given name

Returns:: the meta-data object with the given name, or NULL if there is no such entry

Parameters:

name

the name of the meta-data object

Guarantee: no-fail

double SH::MetaObject::getDouble	(	const std::string &	name,
		double	def_val = `0`
	)			const

the meta-data double with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

virtual Int_t SH::MetaObject::GetEntries ( ) const [virtual]

return the number of entries of this collection

Guarantee: no-fail

virtual TObject** SH::MetaObject::GetObjectRef ( const TObject * meta ) const [virtual]

return pointer to pointer of object meta

Precondition:: meta != 0

Postcondition:: result != 0; *result == meta

Guarantee: strong

Failures: meta not in collection

std::string SH::MetaObject::getString	(	const std::string &	name,
		const std::string &	def_val = `""`
	)			const

the meta-data string with the given name

Returns:: the meta-data with the given name, or def_value if that meta-data is not available or does not have the right type

Parameters:

	name	the name of the meta-data object
	dev_val	the value to return if no meta-data object of the given name exists, or if it does not have the right type

Guarantee: no-fail

Rationale: I return the string by value, because returning by reference seems to break the python binding.

virtual TIterator* SH::MetaObject::MakeIterator ( Bool_t dir = kIterForward ) const [virtual]

make a new iterator for this collection

Postcondition:: result != 0

Guarantee: strong

Failures: out of memory I

MetaObject& SH::MetaObject::operator= ( const MetaObject & that )

standard assignment operator

Returns: this

Guarantee: strong

Failures: out of memory II

virtual TObject* SH::MetaObject::Remove ( TObject * meta ) [virtual]

remove the given object from the list

Precondition:: meta != 0

Guarantee: strong

Failures: meta not in list

void SH::MetaObject::remove ( const std::string & name )

remove all meta-information with the given name

Parameters:

name

the meta-data name to remove

Guarantee: basic, may only delete some entries

Failures: out of memory II

void SH::MetaObject::setBool	(	const std::string &	name,
		bool	value
	)

set the meta-data boolean with the given name

Parameters:

	name	the name of the meta-data
	value	the value to which it is set

Guarantee: basic, may clear old entry without adding new one

Failures: out of memory II

void SH::MetaObject::setDouble	(	const std::string &	name,
		double	value
	)

set the meta-data double with the given name

Parameters:

	name	the name of the meta-data
	value	the value to which it is set

Guarantee: basic, may clear old entry without adding new one

Failures: out of memory II

void SH::MetaObject::setInteger	(	const std::string &	name,
		int	value
	)

set the meta-data integer with the given name

Parameters:

	name	the name of the meta-data
	value	the value to which it is set

Guarantee: basic, may clear old entry without adding new one

Failures: out of memory II

void SH::MetaObject::setString	(	const std::string &	name,
		const std::string &	value
	)

set the meta-data string with the given name

Parameters:

	name	the name of the meta-data
	value	the value to which it is set

Guarantee: basic, may clear old entry without adding new one

Failures: out of memory II

template<class T >

void SH::MetaObject::setT	(	const std::string &	name,
		T	value
	)			`[inline]`

set the meta-data element with the given name

Parameters:

	name	the name of the meta-data
	value	the value to which it is set

Guarantee: basic, may clear old entry without adding new one

Failures: out of memory II

void SH::MetaObject::swap ( MetaObject & that )

standard swap

Guarantee: no-fail

void SH::MetaObject::testInvariant ( ) const

test the invariant of this object

Guarantee: no-fail

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

/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/SampleHandler/SampleHandler/MetaObject.h

SH::MetaObject Class Reference

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation