Model filter that enforces NRL cardinality rules. More...
#include <Soprano/NRLModel>
Public Member Functions | |
NRLModel () | |
NRLModel (Model *parent) | |
~NRLModel () | |
void | setIgnoreContext (bool b) |
bool | ignoreContext () const |
Error::ErrorCode | addNrlStatement (const Statement &s) |
QUrl | createGraph (const QUrl &type, QUrl *metadataGraph=0) |
Error::ErrorCode | removeGraph (const QUrl &graph) |
Model filter that enforces NRL cardinality rules.
The NRLModel enforces NRL cardinality rules. That means predicates with a cardinality of maximum 1 are always udpated while statements that define predicates with a maximum cardinality bigger than 1 are rejected once the maximum is reached (future versions might remove an earlier defined statement based on the time the old statements were added).
Thus, at the moment NRLModel is mostly usable for handling properties with a maximum cardinality of 1.
THE API AND EVEN THE COMPLETE CLASS IS SUBJECT TO CHANGE!
Definition at line 53 of file nrlmodel.h.
Soprano::NRLModel::NRLModel | ( | ) |
Soprano::NRLModel::NRLModel | ( | Model * | parent | ) |
Soprano::NRLModel::~NRLModel | ( | ) |
void Soprano::NRLModel::setIgnoreContext | ( | bool | b | ) |
When enforcing the NRL cardinality rules NRLModel can either ignore the context of statements or treat different contexts as separate sets, each resetting the cardinality.
b | If true (the default) NRLModel does ignore the context when enforcing rules. If false the NRL rules can be violated across contexts. |
bool Soprano::NRLModel::ignoreContext | ( | ) | const |
true
if contexts should be ignored when enforcing NRL rules.Error::ErrorCode Soprano::NRLModel::addNrlStatement | ( | const Statement & | s | ) |
Add a statement.
s | The statement containing the property to be set. If the predicate has NRL cardinality restrictions existing statements will be updated. Otherwise this method has the same effect as Model::addStatement(). |
Adding a statement that defines a predicate with a maximum cardinality bigger than 1 which has already been reached fails with an error.
Create a new graph of type type
.
This will actually create two graphs: the requested one and its metadata graph which will already contain basic metadata like creation date.
Error::ErrorCode Soprano::NRLModel::removeGraph | ( | const QUrl & | graph | ) |
Remove a complete graph including its metadata graph
This method can be seen as the counterpart to createGraph