Package org.apache.clerezza.rdf.core.access

This package provides access to named org.apache.clerezza.rdf.model.GraphS and org.apache.clerezza.rdf.model.MGraphS that may originate from various implementations.

See:
Description

Interface Summary

LockableMGraph	Represents an MGraph that can be locked for reading/writing.
TcProvider	A TC (TripleCollection) Provider allows access to and optionally creation of named Graphs and MGraphs (mutable graphs)
WeightedTcProvider	This interface is implemented by providers to which TcManagerImpl delegates.

Class Summary

GraphServiceFactory
LockableMGraphWrapper	Wrappes an MGraph as a LockableMGraph, this class is used by TcManager to support TcProviders that do not privide LockableMGraph.
MGraphServiceFactory
SecuredMGraph	A SecuredMGraph is a LockableMGraph that wraps a LockableMGraph checking each access for the rights on a the graph for which the uri is passed to the constructor.
SecuredTripleCollection	A Secured triple collection wraps a triple collection checking each access for the rights on a the graph for which the uri is passed to the constructor.
TcManager	This class implements TcManager, delegating the actual provision and creation of Graphs or MGraphs to registered TcProviders.
TcProviderMultiplexer	This makes a set of WeightedTcProvider appear as one TcProvider.
WeightedProviderComparator	Compares the WeightedTcManagementProviders, descending for weight and ascending by name

Exception Summary

EntityAlreadyExistsException	is thrown on an attempt to create an entity with a name which already exists
EntityUndeletableException	is thrown on an attempt to delete an entity with a provider that supports the delete operation when the specified entity cannot be deleted
NoSuchEntityException	is thrown on an attempt to perform an operation on an entity (i.e.
ReadOnlyException	is thrown on an attempt to add or remove triples to a read-only mutable graph

Package org.apache.clerezza.rdf.core.access Description

This package provides access to named org.apache.clerezza.rdf.model.GraphS and org.apache.clerezza.rdf.model.MGraphS that may originate from various implementations.

Accessing

If running in a dependency injection system you should get an instance of TcManager by the framework, otherwise use the static method TcManager.getInstance .

Adding a provider

A provider implements WeightedTcProvider.

To work outside a component injection framework it contains a file META-INF/services/org.apache.clerezza.rdf.model.access.WeightedTcProvider containing the name of the implementing class.

To work in a OSGi-DS context the provider register a component exposing org.apache.clerezza.rdf.model.access.WeightedTcProvider as service interface.