DiscoveryQuery< MO > Class Template Reference

#include "steam/mobject/session/scope-query.hpp"

Description

template<class MO>
class steam::mobject::session::DiscoveryQuery< MO >

ABC to build Queries for placement-attached objects.

The Placements obtained from such a query are typed to the specific MObject type given as template parameter. To ensure this, an additional ContentFilter is applied on the yielded results; this filter function is constructed by a virtual call when actually issuing the query.

Definition at line 65 of file scope-query.hpp.

Public Types
typedef function< bool(PlacementMO const &)>	ContentFilter
typedef _Query::iterator	iterator
Public Types inherited from Query< RES >
typedef lib::IterAdapter< Cursor, PReso >	iterator
Public Types inherited from Goal
enum	Kind {   EMPTY = 0,   GENERIC = 1,   DISCOVERY,   PLACEMENT }

Public Member Functions
ContentFilter	contentFilter () const
Public Member Functions inherited from Query< RES >
	Query (string querySpec)
string	extractID (Symbol predicate) const
	convenience shortcut to extract a desired name-ID. More...
	operator QueryKey () const
	automatic conversion from Query to QueryKey for indexing and ordering. More...
iterator	operator() (QueryResolver const &resolver) const
	notational convenience shortcut, synonymous to Query<RES>::resolveBy()
Builder	rebuild () const
iterator	resolveBy (QueryResolver const &resolver) const
bool	usesPredicate (Symbol predicate) const
Public Member Functions inherited from Goal
virtual	~Goal ()
	this is a marker baseclass
QueryID const &	getQID () const

Protected Member Functions
virtual ContentFilter	buildContentFilter () const =0
	yield additional filter to be applied to the result set. More...
Protected Member Functions inherited from Query< RES >
	Query (QueryID typeID, lib::QueryText const &genericQuerySpec)
	Query (QueryID typeID, string querySpec)
virtual lib::QueryText	buildSyntacticRepresentation () const
	Extension point to generate a generic query definition on demand. More...
lib::QueryText	getQueryDefinition () const
	access the complete syntactical representation of this query. More...
Protected Member Functions inherited from Goal
	Goal (QueryID qid)

Private Types
typedef Query< Placement< MO > >	_Query

Private Member Functions
DiscoveryQuery const &	operator= (DiscoveryQuery const &)
	Assignment explicitly disallowed (but copy ctor is ok)

Additional Inherited Members
Static Public Member Functions inherited from Query< RES >
static Builder	build (Kind queryType=Goal::GENERIC)
Static Protected Member Functions inherited from Query< RES >
static QueryID	defineQueryTypeID (Kind queryType=Goal::GENERIC)
Protected Attributes inherited from Goal
QueryID	id_

Member Function Documentation

buildContentFilter()

virtual ContentFilter buildContentFilter ( ) const

protectedpure virtual

yield additional filter to be applied to the result set.

Implemented in ScopeQuery< MO >, and SpecificContentsQuery< MO >.

Inheritance diagram for DiscoveryQuery< MO >:

Collaboration diagram for DiscoveryQuery< MO >:

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

• scope-query.hpp