Interface for a component that manages application configuration options. More...

#include </builds/gaudi/Gaudi/GaudiKernel/include/Gaudi/Interfaces/IOptionsSvc.h>

Inheritance diagram for Gaudi::Interfaces::IOptionsSvc:

Collaboration diagram for Gaudi::Interfaces::IOptionsSvc:

Public Types
using	OnlyDefaults = Gaudi::tagged_bool< class OnlyDefaults_tag >

Public Types inherited from IInterface
enum	Status : StatusCode::code_t { Status::FAILURE = 0, Status::SUCCESS = 1, Status::NO_INTERFACE, Status::VERSMISMATCH, Status::LAST_ERROR }
	Return status. More...

using	iid = Gaudi::InterfaceId< IInterface, 0, 0 >
	Interface ID. More...

using	ext_iids = Gaudi::interface_list< iid >
	Extra interfaces. More...

Public Member Functions
	DeclareInterfaceID (IOptionsSvc, 1, 0)
	InterfaceID declaration. More...

virtual void	set (const std::string &key, const std::string &value)=0
	Set the value of an option, overriding the old value, if any. More...

virtual std::string	get (const std::string &key, const std::string &default_={}) const =0
	Get the value of an options, returning the specified default value if not found. More...

virtual std::string	pop (const std::string &key, const std::string &default_={})=0
	Get the value of an options, removing it from the storage, returning the specified default value if not found. More...

virtual bool	has (const std::string &key) const =0
	Test if an option key is available in the catalog. More...

virtual bool	isSet (const std::string &key) const =0
	Test if an option key was explicitly set or not. More...

virtual void	bind (const std::string &prefix, Gaudi::Details::PropertyBase *property)=0
	Register a Gaudi::Property instance to the option service. More...

virtual void	broadcast (const std::regex &filter, const std::string &value, OnlyDefaults defaults=OnlyDefaults{ true })=0
	Broadcast version of IOptionsSvc::set. More...

virtual StatusCode	readOptions (std::string_view file, std::string_view path="")=0
	look for file 'file' into search path 'path' and read it to update the options More...

Methods to query options.
These methods allow to extract the list of know options with their values.
virtual std::vector< std::tuple< std::string, std::string > >	items () const =0
	Return all known options with their values. More...

template<class UnaryPredicate >
std::vector< std::tuple< std::string, std::string > >	items (UnaryPredicate predicate) const
	Return all known options with their values for which `predicate` evaluates to true. More...

std::vector< std::tuple< std::string, std::string > >	items (const std::regex &filter) const
	Return all known options with their values for which the key matches the given regular expression. More...

Public Member Functions inherited from IInterface
template<Gaudi::IsInterface TARGET>
TARGET *	cast ()

template<Gaudi::IsInterface TARGET>
TARGET const *	cast () const

template<typename TARGET >
	requires (!Gaudi::IsInterface< TARGET >) TARGET *cast()

template<typename TARGET >
	requires (!Gaudi::IsInterface< TARGET >) TARGET const *cast() const

virtual std::vector< std::string >	getInterfaceNames () const =0
	Returns a vector of strings containing the names of all the implemented interfaces. More...

virtual unsigned long	addRef () const =0
	Increment the reference count of Interface instance. More...

virtual unsigned long	release () const =0
	Release Interface instance. More...

virtual unsigned long	refCount () const =0
	Current reference count. More...

virtual StatusCode	queryInterface (const InterfaceID &ti, void **pp)=0
	Set the void** to the pointer to the requested interface of the instance. More...

virtual	~IInterface ()=default
	Virtual destructor. More...

virtual void const *	i_cast (const InterfaceID &) const =0

void *	i_cast (const InterfaceID &iid)

Protected Member Functions
virtual	~IOptionsSvc ()=default

Protected Member Functions inherited from IInterface
virtual unsigned long	decRef () const =0
	Decrement reference count and return the new reference count. More...

Additional Inherited Members
Static Public Member Functions inherited from IInterface
static const InterfaceID &	interfaceID ()
	Return an instance of InterfaceID identifying the interface. More...

Detailed Description

Interface for a component that manages application configuration options.

Options are to be recorded as pairs of strings: option id and value. The value must be the string representation of the a value, as understood by Gaudi::Property<T>::fromString().

For example, if an Algorithm defines two properties as in

class MyAlg: public Algorithm {
  Gaudi::Property<std::string> m_hname{this, "HistoName", "none"};
  Gaudi::Property<float> m_threshold{this, "Threshold", 1.0};
};

The IOptionsSvc instance should be populated with something like

auto& optsSvc = sericeLocator()->getOptsSvc();
optsSvc.set("AlgInstanceName.HistoName", "'my_histogram'");
optsSvc.set("AlgInstanceName.Threshold", "2.345");

Definition at line 46 of file IOptionsSvc.h.

Member Typedef Documentation

◆ OnlyDefaults

using Gaudi::Interfaces::IOptionsSvc::OnlyDefaults = Gaudi::tagged_bool<class OnlyDefaults_tag>

Definition at line 94 of file IOptionsSvc.h.

Constructor & Destructor Documentation

◆ ~IOptionsSvc()

virtual Gaudi::Interfaces::IOptionsSvc::~IOptionsSvc ( )

protectedvirtualdefault

Member Function Documentation

◆ bind()

virtual void Gaudi::Interfaces::IOptionsSvc::bind	(	const std::string &	prefix,
		Gaudi::Details::PropertyBase *	property
	)

pure virtual

Register a Gaudi::Property instance to the option service.

The option will be bound to the property with name <prefix>.<property-name>, and immediately assigned the value set in the options service, if any.

After the binding, setting a property value via IOptionsSvc::set will automatically set the value of the Gaudi::Property instance, and IOptionsSvc::get will return the string representation of the value of the Gaudi::Property instance.

◆ broadcast()

virtual void Gaudi::Interfaces::IOptionsSvc::broadcast	(	const std::regex &	filter,
		const std::string &	value,
		OnlyDefaults	defaults = `OnlyDefaults{ true }`
	)

pure virtual

Broadcast version of IOptionsSvc::set.

With IOptionsSvc::broadcast it is possible to assign one value to all known properties matching a regular expression. By default, only default values are overridden, but explicitly assigned values can also be overridden passing OnlyDefaults{false} as third argument to the method.

◆ DeclareInterfaceID()

Gaudi::Interfaces::IOptionsSvc::DeclareInterfaceID	(	IOptionsSvc	,
		1	,
		0
	)

InterfaceID declaration.

◆ get()

virtual std::string Gaudi::Interfaces::IOptionsSvc::get	(	const std::string &	key,
		const std::string &	default_ = `{}`
	)		const

pure virtual

Get the value of an options, returning the specified default value if not found.

◆ has()

virtual bool Gaudi::Interfaces::IOptionsSvc::has ( const std::string & key ) const

pure virtual

Test if an option key is available in the catalog.

◆ isSet()

virtual bool Gaudi::Interfaces::IOptionsSvc::isSet ( const std::string & key ) const

pure virtual

Test if an option key was explicitly set or not.

◆ items() [1/3]

virtual std::vector<std::tuple<std::string, std::string> > Gaudi::Interfaces::IOptionsSvc::items ( ) const

pure virtual

Return all known options with their values.

◆ items() [2/3]

std::vector<std::tuple<std::string, std::string> > Gaudi::Interfaces::IOptionsSvc::items ( const std::regex & filter ) const

inline

Return all known options with their values for which the key matches the given regular expression.

Definition at line 77 of file IOptionsSvc.h.

                                                                                       {
         std::smatch match;
         return items(
             [&filter, &match]( const auto& element ) { return regex_match( std::get<0>( element ), match, filter ); } );
       }

◆ items() [3/3]

template<class UnaryPredicate >

std::vector<std::tuple<std::string, std::string> > Gaudi::Interfaces::IOptionsSvc::items ( UnaryPredicate predicate ) const

inline

Return all known options with their values for which predicate evaluates to true.

Definition at line 69 of file IOptionsSvc.h.

                                                                                         {
         auto v = this->items();
         v.erase( std::remove_if( begin( v ), end( v ),
                                  [&predicate]( const auto& element ) { return !predicate( element ); } ),
                  v.end() );
         return v;
       }

◆ pop()

virtual std::string Gaudi::Interfaces::IOptionsSvc::pop	(	const std::string &	key,
		const std::string &	default_ = `{}`
	)

pure virtual

Get the value of an options, removing it from the storage, returning the specified default value if not found.

◆ readOptions()

virtual StatusCode Gaudi::Interfaces::IOptionsSvc::readOptions	(	std::string_view	file,
		std::string_view	path = `""`
	)

pure virtual

look for file 'file' into search path 'path' and read it to update the options

◆ set()

virtual void Gaudi::Interfaces::IOptionsSvc::set	(	const std::string &	key,
		const std::string &	value
	)

pure virtual

Set the value of an option, overriding the old value, if any.

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

GaudiKernel/include/Gaudi/Interfaces/IOptionsSvc.h

Public Types

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ OnlyDefaults

Constructor & Destructor Documentation

◆ ~IOptionsSvc()

Member Function Documentation

◆ bind()

◆ broadcast()

◆ DeclareInterfaceID()

◆ get()

◆ has()

◆ isSet()

◆ items() [1/3]

◆ items() [2/3]

◆ items() [3/3]

◆ pop()

◆ readOptions()

◆ set()