org.openrdf.sesame.sailimpl.memory
Class RdfSchemaRepository

java.lang.Object
  org.openrdf.sesame.sailimpl.memory.RdfSource
      org.openrdf.sesame.sailimpl.memory.RdfRepository
          org.openrdf.sesame.sailimpl.memory.RdfSchemaRepository

All Implemented Interfaces:

RdfRepository, RdfSchemaRepository, RdfSchemaSource, RdfSource, Sail, ValueFactory

public class RdfSchemaRepository

extends RdfRepository

implements RdfSchemaRepository

An implementation of the RdfSchemaRepository interface extending the memory repository with Schema inferencing capabilities.

Version:

$Revision: 1.19.2.4 $

Author:

Jeen Broekstra, Arjohn Kampman

Field Summary

Fields inherited from class org.openrdf.sesame.sailimpl.memory.RdfRepository

SYNC_DELAY_KEY

Fields inherited from class org.openrdf.sesame.sailimpl.memory.RdfSource

COMPRESS_FILE_KEY, DATA_FORMAT_KEY, FILE_KEY

Constructor Summary

RdfSchemaRepository()

Method Summary

void	addStatement(Resource subj, URI pred, Value obj) Adds a statament to the repository.
void	clearRepository() Clears the repository.
void	commitTransaction() Commits a started transaction.
StatementIterator	getClasses() Gets all defined classes.
StatementIterator	getDirectSubClassOf(Resource subClass, Resource superClass) Gets all direct subClassOf relations with a specific sub- and/or superclass.
StatementIterator	getDirectSubPropertyOf(Resource subProp, Resource superProp) Gets all direct subPropertyOf relations with a specific sub- and/or superproperty.
StatementIterator	getDirectType(Resource anInstance, Resource aClass) Gets all direct type relations with a specific instance and/or class.
StatementIterator	getDomain(Resource prop, Resource domain) Gets all domain relations with a specific property and/or domain class.
StatementIterator	getExplicitStatements(Resource subj, URI pred, Value obj) Gets all explicitly added statements with a specific subject, predicate and/or object.
LiteralIterator	getLiterals(String label, String language, URI datatype) Gets all literals with a specific label, language and/or datatype.
StatementIterator	getProperties() Gets all defined properties.
StatementIterator	getRange(Resource prop, Resource range) Gets all range relations with a specific property and/or range class.
StatementIterator	getStatements(Resource subj, URI pred, Value obj) Gets all statements with a specific subject, predicate and/or object.
StatementIterator	getStatements(Resource subj, URI pred, Value obj, boolean explicitOnly)
StatementIterator	getSubClassOf(Resource subClass, Resource superClass) Gets all subClassOf relations with a specific sub- and/or superclass.
StatementIterator	getSubPropertyOf(Resource subProperty, Resource superProperty) Gets all subPropertyOf relations with a specific sub- and/or superproperty.
StatementIterator	getType(Resource anInstance, Resource aClass) Gets all type relations with a specific instance and/or class.
boolean	hasExplicitStatement(Resource subj, URI pred, Value obj) Checks if an explicitly added statement with a specific subject, predicate and/or object is present in the repository.
boolean	hasStatement(Resource subj, URI pred, Value obj) Checks whether some statement with a specific subject, predicate and/or object is present in the repository.
boolean	hasStatement(Resource subj, URI pred, Value obj, boolean explicitOnly)
void	initialize(File file, RDFFormat dataFormat, boolean compressFile) Initializes this repository, using the specified file for persistent storage.
boolean	isClass(Resource resource) Checks whether the supplied resource represents a class.
boolean	isDirectSubClassOf(Resource subClass, Resource superClass) Checks whether one resource is a direct subclass of another.
boolean	isDirectSubPropertyOf(Resource subProperty, Resource superProperty) Checks whether one resource is a direct subproperty of another.
boolean	isDirectType(Resource anInstance, Resource aClass) Checks whether one resource is a direct instance of another.
boolean	isProperty(Resource resource) Checks whether the supplied resource represents a property.
boolean	isSubClassOf(Resource subClass, Resource superClass) Checks whether one resource is a subclass of another.
boolean	isSubPropertyOf(Resource subProperty, Resource superProperty) Checks whether one resource is a subproperty of another.
boolean	isType(Resource anInstance, Resource aClass) Checks whether one resource is an instance of another.
int	removeStatements(Resource subj, URI pred, Value obj) Removes data statements that match the (subject, predicate, object) pattern from the repository.

Methods inherited from class org.openrdf.sesame.sailimpl.memory.RdfRepository

addListener, changeNamespacePrefix, getSyncDelay, initialize, removeListener, setSyncDelay, shutDown, startTransaction, sync, transactionStarted

Methods inherited from class org.openrdf.sesame.sailimpl.memory.RdfSource

createBNode, createBNode, createLiteral, createLiteral, createLiteral, createStatement, createURI, createURI, getNamespaces, getValueFactory, initialize, optimizeQuery

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.sesame.sail.RdfSource

getNamespaces, getValueFactory, optimizeQuery

Methods inherited from interface org.openrdf.sesame.sail.Sail

initialize, shutDown

Methods inherited from interface org.openrdf.sesame.sail.RdfRepository

addListener, changeNamespacePrefix, removeListener, startTransaction, transactionStarted

Constructor Detail

RdfSchemaRepository

public RdfSchemaRepository()

Method Detail

initialize

public void initialize(File file,
                       RDFFormat dataFormat,
                       boolean compressFile)
                throws SailInitializationException

Description copied from class: RdfSource

Initializes this repository, using the specified file for persistent storage.

Overrides:

initialize in class RdfRepository

Throws:

SailInitializationException

getStatements

public StatementIterator getStatements(Resource subj,
                                       URI pred,
                                       Value obj)

Description copied from interface: RdfSource

Gets all statements with a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards.

Specified by:

getStatements in interface RdfSource

Overrides:

getStatements in class RdfSource

hasStatement

public boolean hasStatement(Resource subj,
                            URI pred,
                            Value obj)

Description copied from interface: RdfSource

Checks whether some statement with a specific subject, predicate and/or object is present in the repository. All three parameters may be null to indicate wildcards.

Specified by:

hasStatement in interface RdfSource

Overrides:

hasStatement in class RdfSource

getExplicitStatements

public StatementIterator getExplicitStatements(Resource subj,
                                               URI pred,
                                               Value obj)

Description copied from interface: RdfSchemaSource

Gets all explicitly added statements with a specific subject, predicate and/or object. All of these parameters may be null to indicate wildcards.

Specified by:

getExplicitStatements in interface RdfSchemaSource

Parameters:

subj - subject of pattern

pred - predicate of pattern

obj - object of pattern

Returns:

iterator over statements

See Also:

RdfSource.getStatements(org.openrdf.model.Resource, org.openrdf.model.URI, org.openrdf.model.Value)

getStatements

public StatementIterator getStatements(Resource subj,
                                       URI pred,
                                       Value obj,
                                       boolean explicitOnly)

hasExplicitStatement

public boolean hasExplicitStatement(Resource subj,
                                    URI pred,
                                    Value obj)

Description copied from interface: RdfSchemaSource

Checks if an explicitly added statement with a specific subject, predicate and/or object is present in the repository. All of these parameters may be null to indicate wildcards.

Specified by:

hasExplicitStatement in interface RdfSchemaSource

Parameters:

subj - subject of statement

pred - predicate of statement

obj - object of statement

Returns:

boolean indicating if the specified statement is present.

See Also:

RdfSource.hasStatement(org.openrdf.model.Resource, org.openrdf.model.URI, org.openrdf.model.Value)

hasStatement

public boolean hasStatement(Resource subj,
                            URI pred,
                            Value obj,
                            boolean explicitOnly)

getClasses

public StatementIterator getClasses()

Description copied from interface: RdfSchemaSource

Gets all defined classes.

Specified by:

getClasses in interface RdfSchemaSource

Returns:

A StatementIterator containing statements of the form (someClass, rdf:type, rdfs:Class).

isClass

public boolean isClass(Resource resource)

Description copied from interface: RdfSchemaSource

Checks whether the supplied resource represents a class.

Specified by:

isClass in interface RdfSchemaSource

Parameters:

resource - A resource

Returns:

true if resource is a class, false otherwise.

getProperties

public StatementIterator getProperties()

Description copied from interface: RdfSchemaSource

Gets all defined properties.

Specified by:

getProperties in interface RdfSchemaSource

Returns:

A StatementIterator containing statements of the form (someProperty, rdf:type, rdf:Property).

isProperty

public boolean isProperty(Resource resource)

Description copied from interface: RdfSchemaSource

Checks whether the supplied resource represents a property.

Specified by:

isProperty in interface RdfSchemaSource

Parameters:

resource - A resource

Returns:

true if resource is a property, false otherwise.

getSubClassOf

public StatementIterator getSubClassOf(Resource subClass,
                                       Resource superClass)

Description copied from interface: RdfSchemaSource

Gets all subClassOf relations with a specific sub- and/or superclass. Note that the subClassOf relation is reflexive: a class is implicitly always a subclass of itself.

Specified by:

getSubClassOf in interface RdfSchemaSource

Parameters:

subClass - The subclass of the relations that should be returned, or null if relations with any subclass should be returned.

superClass - The superclass of the relations that should be returned, or null if relations with any superclass should be returned.

Returns:

A StatementIterator containing statements of the form (someSubClass, rdfs:subClassOf, someSuperClass).

isSubClassOf

public boolean isSubClassOf(Resource subClass,
                            Resource superClass)

Description copied from interface: RdfSchemaSource

Checks whether one resource is a subclass of another.

Specified by:

isSubClassOf in interface RdfSchemaSource

Parameters:

subClass - A class

superClass - A class

Returns:

true if subClass is a subclass of superClass, false otherwise.

getDirectSubClassOf

public StatementIterator getDirectSubClassOf(Resource subClass,
                                             Resource superClass)

Description copied from interface: RdfSchemaSource

Gets all direct subClassOf relations with a specific sub- and/or superclass. A class A is a direct subclass of class B if there is no class C such that A is a subclass of C and C is a subclass of B.

Specified by:

getDirectSubClassOf in interface RdfSchemaSource

Parameters:

subClass - The subclass of the relations that should be returned, or null if relations with any subclass should be returned.

superClass - The superclass of the relations that should be returned, or null if relations with any superclass should be returned.

Returns:

A StatementIterator containing statements of the form (someSubClass, rdfs:subClassOf, someSuperClass).

isDirectSubClassOf

public boolean isDirectSubClassOf(Resource subClass,
                                  Resource superClass)

Description copied from interface: RdfSchemaSource

Checks whether one resource is a direct subclass of another.

Specified by:

isDirectSubClassOf in interface RdfSchemaSource

Parameters:

subClass - A class

superClass - A class

Returns:

true if subClass is a direct subclass of superClass, false otherwise.

getSubPropertyOf

public StatementIterator getSubPropertyOf(Resource subProperty,
                                          Resource superProperty)

Description copied from interface: RdfSchemaSource

Gets all subPropertyOf relations with a specific sub- and/or superproperty. Note that the subPropertyOf relation is reflexive: a property is implicitly always a subproperty of itself.

Specified by:

getSubPropertyOf in interface RdfSchemaSource

Parameters:

subProperty - The subproperty of the relations that should be returned, or null if relations with any subproperty should be returned.

superProperty - The superproperty of the relations that should be returned, or null if relations with any superproperty should be returned.

Returns:

A StatementIterator containing statements of the form (someSubProperty, rdfs:subPropertyOf, someSuperProperty).

isSubPropertyOf

public boolean isSubPropertyOf(Resource subProperty,
                               Resource superProperty)

Description copied from interface: RdfSchemaSource

Checks whether one resource is a subproperty of another.

Specified by:

isSubPropertyOf in interface RdfSchemaSource

Parameters:

subProperty - A property

superProperty - A property

Returns:

true if subProperty is a subproperty of superProperty, false otherwise.

getDirectSubPropertyOf

public StatementIterator getDirectSubPropertyOf(Resource subProp,
                                                Resource superProp)

Description copied from interface: RdfSchemaSource

Gets all direct subPropertyOf relations with a specific sub- and/or superproperty. A property A is a direct subproperty of property B if there is no property C such that A is a subproperty of C and C is a subproperty of B.

Specified by:

getDirectSubPropertyOf in interface RdfSchemaSource

Parameters:

subProp - The subproperty of the relations that should be returned, or null if relations with any subproperty should be returned.

superProp - The superproperty of the relations that should be returned, or null if relations with any superproperty should be returned.

Returns:

A StatementIterator containing statements of the form (someSubProperty, rdfs:subPropertyOf, someSuperProperty).

isDirectSubPropertyOf

public boolean isDirectSubPropertyOf(Resource subProperty,
                                     Resource superProperty)

Description copied from interface: RdfSchemaSource

Checks whether one resource is a direct subproperty of another.

Specified by:

isDirectSubPropertyOf in interface RdfSchemaSource

Parameters:

subProperty - A property

superProperty - A property

Returns:

true if subProperty is a direct subproperty of superProperty, false otherwise.

getDomain

public StatementIterator getDomain(Resource prop,
                                   Resource domain)

Description copied from interface: RdfSchemaSource

Gets all domain relations with a specific property and/or domain class.

Specified by:

getDomain in interface RdfSchemaSource

Parameters:

prop - The property of the relations that should be returned, or null if relations with any property should be returned.

domain - The domain of the relations that should be returned, or null if relations with any domain should be returned.

Returns:

A StatementIterator containing statements of the form (someProperty, rdfs:domain, someClass).

getRange

public StatementIterator getRange(Resource prop,
                                  Resource range)

Description copied from interface: RdfSchemaSource

Gets all range relations with a specific property and/or range class.

Specified by:

getRange in interface RdfSchemaSource

Parameters:

prop - The property of the relations that should be returned, or null if relations with any property should be returned.

range - The range of the relations that should be returned, or null if relations with any range should be returned.

Returns:

A StatementIterator containing statements of the form (someProperty, rdfs:range, someClass).

getType

public StatementIterator getType(Resource anInstance,
                                 Resource aClass)

Description copied from interface: RdfSchemaSource

Gets all type relations with a specific instance and/or class.

Specified by:

getType in interface RdfSchemaSource

Parameters:

anInstance - The instance of the relations that should be returned, or null if relations with any instance should be returned.

aClass - The class of the relations that should be returned, or null if relations with any class should be returned.

Returns:

A StatementIterator containing statements of the form (someInstance, rdf:type, someClass).

isType

public boolean isType(Resource anInstance,
                      Resource aClass)

Description copied from interface: RdfSchemaSource

Checks whether one resource is an instance of another.

Specified by:

isType in interface RdfSchemaSource

Parameters:

anInstance - An instance

aClass - A class

Returns:

true if anInstance is a instance of aClass, false otherwise.

getDirectType

public StatementIterator getDirectType(Resource anInstance,
                                       Resource aClass)

Description copied from interface: RdfSchemaSource

Gets all direct type relations with a specific instance and/or class.

Specified by:

getDirectType in interface RdfSchemaSource

Parameters:

anInstance - The instance of the relations that should be returned, or null if relations with any instance should be returned.

aClass - The class of the relations that should be returned, or null if relations with any class should be returned.

Returns:

A StatementIterator containing statements of the form (someInstance, rdf:type, someClass).

isDirectType

public boolean isDirectType(Resource anInstance,
                            Resource aClass)

Description copied from interface: RdfSchemaSource

Checks whether one resource is a direct instance of another.

Specified by:

isDirectType in interface RdfSchemaSource

Parameters:

anInstance - An instance

aClass - A class

Returns:

true if anInstance is a direct instance of aClass, false otherwise.

getLiterals

public LiteralIterator getLiterals(String label,
                                   String language,
                                   URI datatype)

Description copied from interface: RdfSchemaSource

Gets all literals with a specific label, language and/or datatype.

Specified by:

getLiterals in interface RdfSchemaSource

Parameters:

label - The label of the literals that should be returned, or null if literals with any label should be returned.

language - The language of the literals that should be returned, or null if literals with any language should be returned.

datatype - The datatype of the literals that should be returned, or null if literals with any datatype should be returned.

Returns:

A LiteralIterator containing literals that match the specified pattern.

commitTransaction

public void commitTransaction()

Description copied from interface: RdfRepository

Commits a started transaction. A transaction needs to be commited to be guaranteed that data has been added to, or removed from the repository.

Specified by:

commitTransaction in interface RdfRepository

Overrides:

commitTransaction in class RdfRepository

addStatement

public void addStatement(Resource subj,
                         URI pred,
                         Value obj)
                  throws SailUpdateException

Description copied from interface: RdfRepository

Adds a statament to the repository. You must start a transaction before this method can be used.

Specified by:

addStatement in interface RdfRepository

Overrides:

addStatement in class RdfRepository

Throws:

SailUpdateException

removeStatements

public int removeStatements(Resource subj,
                            URI pred,
                            Value obj)
                     throws SailUpdateException

Description copied from interface: RdfRepository

Removes data statements that match the (subject, predicate, object) pattern from the repository. All three parameters may be null to indicate wildcards. You must start a transaction before this method can be used.

Specified by:

removeStatements in interface RdfRepository

Overrides:

removeStatements in class RdfRepository

Throws:

SailUpdateException

clearRepository

public void clearRepository()
                     throws SailUpdateException

Description copied from interface: RdfRepository

Clears the repository. After the repository was cleared, it will be in the same state as after initialization. You must start a transaction before this method can be used.

Specified by:

clearRepository in interface RdfRepository

Overrides:

clearRepository in class RdfRepository

Throws:

SailUpdateException