DefsManager Class Reference

#include "common/query/defs-manager.hpp"

Description

Organise a collection of preconfigured default objects.

For various kinds of objects we can tweak the default parametrisation as part of the general session configuration. A ref to an instance of this class is accessible through the current session and can be used to fill in parts of the configuration of new objects, if the user code didn't give more specific parameters. Necessary sub-objects will be created on demand, and any default configuration, once found, will be remembered and stored with the current session.

Note

while the logic of defaults handling can be considered roughly final, as of 12/09 most of the actual object handling is placeholder code.

Definition at line 138 of file defs-manager.hpp.

Public Member Functions
	DefsManager () noexcept
	initialise the most basic internal defaults. More...
	~DefsManager ()
void	clear ()
template<class TAR >
P< TAR >	create (const Query< TAR > &capabilities)
template<class TAR >
lib::P< TAR >	create (Query< TAR > const &)
	retrieve an object fulfilling the query and register it as default. More...
template<class TAR >
bool	define (lib::P< TAR > const &, Query< TAR > const &=Query< TAR >())
	register the given object as default, after ensuring it fulfils the query. More...
template<class TAR >
bool	forget (lib::P< TAR > const &)
	remove the defaults registration of the given object, if there was such More...
template<class TAR >
P< TAR >	operator() (const Query< TAR > &capabilities)
template<class TAR >
lib::P< TAR >	operator() (Query< TAR > const &)
	common access point: retrieve the default object fulfilling some given conditions. More...
template<class TAR >
P< TAR >	search (const Query< TAR > &capabilities)
template<class TAR >
lib::P< TAR >	search (Query< TAR > const &)
	search through the registered defaults, never create anything. More...

Private Attributes
unique_ptr< impl::DefsRegistry >	defsRegistry_

Additional Inherited Members
Private Member Functions inherited from NonCopyable
	NonCopyable (NonCopyable const &)=delete
NonCopyable &	operator= (NonCopyable const &)=delete

Constructor & Destructor Documentation

DefsManager()

DefsManager ( )

noexcept

initialise the most basic internal defaults.

Definition at line 65 of file defs-manager-impl.hpp.

~DefsManager()

~DefsManager

(

)

causes std::default_delete from unique_ptr<DefsRegistry> to be emitted here, where the declaration of DefsRegistry is available.

Definition at line 76 of file defs-manager-impl.hpp.

Member Function Documentation

operator()()

lib::P<TAR> operator()

(

Query< TAR > const &

)

common access point: retrieve the default object fulfilling some given conditions.

May silently trigger object creation.

Exceptions

error::Config

in case no solution is possible, which is considered misconfiguration.

Referenced by DefsManager::forget().

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search()

lib::P<TAR> search

(

Query< TAR > const &

)

search through the registered defaults, never create anything.

Returns

object fulfilling the query, empty ptr if not found.

Referenced by DefsManager::clear(), and DefsManager::forget().

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create()

lib::P<TAR> create

(

Query< TAR > const &

)

retrieve an object fulfilling the query and register it as default.

The resolution is delegated to the ConfigQuery system (which may cause creation of new object instances)

Returns

object fulfilling the query, empty ptr if no solution.

Referenced by DefsManager::forget().

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define()

template bool define	(	lib::P< TAR > const &	,
		Query< TAR > const &	= Query< TAR >()
	)

register the given object as default, after ensuring it fulfils the query.

The latter may cause some properties of the object to be set, trigger creation of additional objects, and may fail altogether.

Returns

true if query was successful and object is registered as default

Note

only a weak ref to the object is stored

Definition at line 120 of file defs-manager-impl.hpp.

forget()

template bool forget

(

lib::P< TAR > const &

)

remove the defaults registration of the given object, if there was such

Returns

false if nothing has been changed because the object wasn't registered

Definition at line 134 of file defs-manager-impl.hpp.

References DefsManager::create(), DefsManager::operator()(), and DefsManager::search().

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clear()

void clear

(

)

for session lifecycle

Definition at line 80 of file defs-manager-impl.hpp.

References DefsManager::search().

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Inheritance diagram for DefsManager:

Collaboration diagram for DefsManager:

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

• defs-manager.hpp
• defs-manager-impl.hpp
• config-resolver.cpp