org.apache.clerezza.platform.config

Class SystemConfig

java.lang.Object

org.apache.clerezza.platform.config.SystemConfig

All Implemented Interfaces:

TcProvider, WeightedTcProvider

@Service(value=WeightedTcProvider.class)
public class SystemConfig
extends Object
implements WeightedTcProvider

When the SystemConfig component is activated it checks if the system graph exists, in case it does not exist then it creates the system graph and writes the default platform configuration into it.

Author:

mir

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_SYSTEM_GRAPH
static String	PARSER_FILTER
static String	SERIALIZER_FILTER
static String	SYSTEM_GRAPH_FILTER A filter that can be used to get the system graph as OSGi service, that is provided by org.apache.clerezza.rdf.core.access.TcManager.
static UriRef	SYSTEM_GRAPH_URI Deprecated. use org.apache.clerezza.platform.Contants instead

Constructor Summary

Constructors

Constructor and Description
SystemConfig()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	activate(org.osgi.service.component.ComponentContext componentContext)
Graph	createGraph(UriRef name, TripleCollection triples) Creates a Graph with a specified name
MGraph	createMGraph(UriRef name) Creates an initially empty MGraph with a specified name
protected void	deactivate(org.osgi.service.component.ComponentContext componentContext)
void	deleteTripleCollection(UriRef name) Deletes the Graph or MGraph of a specified name.
Graph	getGraph(UriRef name) Get a Graph by its name
MGraph	getMGraph(UriRef name) Get an MGraph by its name.
Set<UriRef>	getNames(Graph graph) get a set of the names of a Graph
TripleCollection	getTriples(UriRef name) This method is used to get a TripleCollection indifferently whether it's a Graph or an MGraph.
int	getWeight() Get the weight of this provider.
Set<UriRef>	listGraphs() Lists the name of the Graphs available through this TcProvider, implementations may take into account the security context and omit Graphs for which access is not allowed.
Set<UriRef>	listMGraphs() Lists the name of the MGraphs available through this TcProvider, implementations may take into account the security context and omit MGraphs for which access is not allowed.
Set<UriRef>	listTripleCollections() Lists the name of the TripleCollections available through this TcProvider indifferently whether they are Graphs or an MGraphs, implementations may take into account the security context and omit TripleCollections for which access is not allowed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_SYSTEM_GRAPH

public static final String DEFAULT_SYSTEM_GRAPH

See Also:

Constant Field Values

SYSTEM_GRAPH_URI

@Deprecated
public static final UriRef SYSTEM_GRAPH_URI

Deprecated. use org.apache.clerezza.platform.Contants instead

SYSTEM_GRAPH_FILTER

public static final String SYSTEM_GRAPH_FILTER

A filter that can be used to get the system graph as OSGi service, that is provided by org.apache.clerezza.rdf.core.access.TcManager.

See Also:

Constant Field Values

PARSER_FILTER

public static final String PARSER_FILTER

See Also:

Constant Field Values

SERIALIZER_FILTER

public static final String SERIALIZER_FILTER

See Also:

Constant Field Values

Constructor Detail

SystemConfig

public SystemConfig()

Method Detail

activate

protected void activate(org.osgi.service.component.ComponentContext componentContext)

deactivate

protected void deactivate(org.osgi.service.component.ComponentContext componentContext)

getWeight

public int getWeight()

Description copied from interface: WeightedTcProvider

Get the weight of this provider. TcManager will prioritize TcProviders with greater weight.

Specified by:

getWeight in interface WeightedTcProvider

Returns:

a positive number indicating the weight of the provider

getGraph

public Graph getGraph(UriRef name)
               throws NoSuchEntityException

Description copied from interface: TcProvider

Get a Graph by its name

Specified by:

getGraph in interface TcProvider

Parameters:

name - the name of the Graph

Returns:

the Graph with the specified name

Throws:

NoSuchEntityException - if there is no Graph with the specified name

getMGraph

public MGraph getMGraph(UriRef name)
                 throws NoSuchEntityException

Description copied from interface: TcProvider

Get an MGraph by its name. The instances returned in different invocations are equals.

Specified by:

getMGraph in interface TcProvider

Returns:

name the MGraph with the specified name

Throws:

NoSuchEntityException - if there is no MGraph with the specified name

getTriples

public TripleCollection getTriples(UriRef name)
                            throws NoSuchEntityException

Description copied from interface: TcProvider

This method is used to get a TripleCollection indifferently whether it's a Graph or an MGraph. If the name names an MGraph the result is the same as when invoking getMGraph with that argument, analogously for GraphS the method returns an instance equals to what getGraph would return.

Specified by:

getTriples in interface TcProvider

Parameters:

name - the name of the Graph or MGraph

Returns:

the Graph or MGraph

Throws:

NoSuchEntityException - if there is no Graph or MGraph with the specified name

listGraphs

public Set<UriRef> listGraphs()

Description copied from interface: TcProvider

Lists the name of the Graphs available through this TcProvider, implementations may take into account the security context and omit Graphs for which access is not allowed.

Specified by:

listGraphs in interface TcProvider

Returns:

the list of Graphs

listMGraphs

public Set<UriRef> listMGraphs()

Description copied from interface: TcProvider

Lists the name of the MGraphs available through this TcProvider, implementations may take into account the security context and omit MGraphs for which access is not allowed.

Specified by:

listMGraphs in interface TcProvider

Returns:

the list of MGraphs

listTripleCollections

public Set<UriRef> listTripleCollections()

Description copied from interface: TcProvider

Lists the name of the TripleCollections available through this TcProvider indifferently whether they are Graphs or an MGraphs, implementations may take into account the security context and omit TripleCollections for which access is not allowed.

Specified by:

listTripleCollections in interface TcProvider

Returns:

the list of TripleCollections

createMGraph

public MGraph createMGraph(UriRef name)
                    throws UnsupportedOperationException,
                           EntityAlreadyExistsException

Description copied from interface: TcProvider

Creates an initially empty MGraph with a specified name

Specified by:

createMGraph in interface TcProvider

Parameters:

name - names the new MGraph

Returns:

the newly created MGraph

Throws:

UnsupportedOperationException - if this provider doesn't support creating MGraphS

EntityAlreadyExistsException - if an MGraph with the specified name already exists

createGraph

public Graph createGraph(UriRef name,
                TripleCollection triples)
                  throws UnsupportedOperationException,
                         EntityAlreadyExistsException

Description copied from interface: TcProvider

Creates a Graph with a specified name

Specified by:

createGraph in interface TcProvider

Parameters:

name - the name of the Graph to be created

triples - the triples of the new Graph

Returns:

the newly created Graph

Throws:

UnsupportedOperationException - if this provider doesn't support creating GraphS

EntityAlreadyExistsException - if a Graph with the specified name already exists

deleteTripleCollection

public void deleteTripleCollection(UriRef name)
                            throws UnsupportedOperationException,
                                   NoSuchEntityException,
                                   EntityUndeletableException

Description copied from interface: TcProvider

Deletes the Graph or MGraph of a specified name. If name references a Graph and the graph has other names, it will still be available with those other names.

Specified by:

deleteTripleCollection in interface TcProvider

Parameters:

name - the entity to be removed

Throws:

UnsupportedOperationException - if this provider doesn't support entities deletion.

NoSuchEntityException - if name doesn't refer to a Graph or an MGraph.

EntityUndeletableException - if the specified Graph is undeletable

getNames

public Set<UriRef> getNames(Graph graph)

Description copied from interface: TcProvider

get a set of the names of a Graph

Specified by:

getNames in interface TcProvider

Returns:

the set names of Graph, the set is empty if Graph is unknown