common/configrules.hpp File Reference

---

Detailed Description

Interface for accessing rule based configuration.

By using the Query template, you can pose a query in prolog syntax and get some existing or newly created object fulfilling the requested predicates. The actual implementation is hidden behind the instance (Singleton factory). As of 1/2008, it is planned to use an embedded YAP Prolog system at some point in the future, for now we use a mock implementation employing a preconfigured Map.

Fully implementing this facility would require the participating objects to register capabilities they want to provide, together with functors carrying out the neccessary configuration steps. All details and consequences of this approach still have to be worked out...

Note:

this is rather a scrapbook and in flux... don't take this code too literal!

See also:

lumiera::Query

mobject::session::DefsManager

asset::StructFactory

Definition in file configrules.hpp.

#include "common/p.hpp"
#include "common/query.hpp"
#include "common/meta/generator.hpp"
#include "common/singletonsubclass.hpp"
#include "proc/mobject/session/track.hpp"
#include "proc/asset/procpatt.hpp"
#include "proc/asset/pipe.hpp"
#include "proc/asset/track.hpp"
#include <string>

Include dependency graph for configrules.hpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Namespaces
namespace	lumiera
namespace	lumiera::query
Classes
class	lumiera::ConfigRules
	user-visible Interface to the ConfigRules subsystem. More...
class	lumiera::query::ConfigRules< TYPES >
	Generic query interface for retrieving objects matching some capability query. More...
class	lumiera::query::Pred< SYM, SIG >
class	lumiera::query::QueryHandler< TY >
	the "frontside" interface: the Proc-Layer code can use this QueryHandler to retrieve instances of the type TY fulfilling the given Query. More...
class	lumiera::query::Resolver
class	lumiera::query::TypeHandler< TY >
	the "backside" interface towards the classes participating in the configuration system (the config system will be delivering instances of these classes for a given query). More...
Typedefs
typedef lumiera::typelist::Types < mobject::session::Track, asset::Track, asset::Pipe, const asset::ProcPatt >::List	lumiera::InterfaceTypes
	the list of all concrete types participating in the rule based config query system
Functions
bool	lumiera::query::isFakeBypass (string const &q)
	lumiera::query::LUMIERA_ERROR_DECLARE (CAPABILITY_QUERY)
	unresolvable capability query.
void	lumiera::query::setFakeBypass (string const &q)
	backdoor for tests: the next config query with this query string will magically suceed with every candidate object provided.