org.apache.marmotta.ldpath.backend.sesame

Class SesameRepositoryBackend

java.lang.Object

org.apache.marmotta.ldpath.backend.sesame.SesameValueBackend

org.apache.marmotta.ldpath.backend.sesame.AbstractSesameBackend

org.apache.marmotta.ldpath.backend.sesame.SesameRepositoryBackend

All Implemented Interfaces:

NodeBackend<org.openrdf.model.Value>, RDFBackend<org.openrdf.model.Value>

Direct Known Subclasses:

FileBackend, LMFBackend, ThreadingSesameBackend

public class SesameRepositoryBackend
extends AbstractSesameBackend

Generic implementation of a Sesame backend for LDPath. A Sesame repository is passed as argument to the constructor.

ATTENTION: This backend is creating an independent (new) transaction for each invocation of listObjects(Value, Value) or listSubjects(Value, Value). Consider using the SesameConnectionBackend for inproved performance!

Implementatins can either use this class directly or implement their own Sesame-based backend by subclassing and calling the super constructor.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SesameRepositoryBackend() Initialise a new sesame backend.
	SesameRepositoryBackend(org.openrdf.repository.Repository repository) Initialise a new sesame backend using the repository passed as argument.
	SesameRepositoryBackend(org.openrdf.repository.Repository repository, boolean includeInferred, org.openrdf.model.Resource... contexts) Initialise a new sesame backend using the repository.

Method Summary

Methods

Modifier and Type	Method and Description
org.openrdf.model.Literal	createLiteral(String content) Create a literal node with the content passed as argument
org.openrdf.model.Literal	createLiteral(String content, Locale language, URI type) Create a literal node with the content passed as argument
org.openrdf.model.URI	createURI(String uri) Create a URI mode with the URI passed as argument
org.openrdf.repository.Repository	getRepository()
Collection<org.openrdf.model.Value>	listObjects(org.openrdf.model.Value subject, org.openrdf.model.Value property) List the objects of triples in the triple store underlying this backend that have the subject and property given as argument.
Collection<org.openrdf.model.Value>	listSubjects(org.openrdf.model.Value property, org.openrdf.model.Value object) List the subjects of triples in the triple store underlying this backend that have the object and property given as argument.
void	setRepository(org.openrdf.repository.Repository repository)

Methods inherited from class org.apache.marmotta.ldpath.backend.sesame.AbstractSesameBackend

createLiteralInternal, createLiteralInternal, createURIInternal, getThreadPool, listObjectsInternal, listSubjectsInternal, merge, supportsThreading

Methods inherited from class org.apache.marmotta.ldpath.backend.sesame.SesameValueBackend

booleanValue, dateTimeValue, dateValue, debugType, decimalValue, doubleValue, floatValue, getLiteralLanguage, getLiteralType, integerValue, intValue, isBlank, isLiteral, isURI, longValue, stringValue, timeValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.marmotta.ldpath.api.backend.NodeBackend

booleanValue, dateTimeValue, dateValue, decimalValue, doubleValue, floatValue, getLiteralLanguage, getLiteralType, integerValue, intValue, isBlank, isLiteral, isURI, longValue, stringValue, timeValue

Constructor Detail

SesameRepositoryBackend

protected SesameRepositoryBackend()

Initialise a new sesame backend. Repository needs to be set using setRepository.

SesameRepositoryBackend

public SesameRepositoryBackend(org.openrdf.repository.Repository repository)

Initialise a new sesame backend using the repository passed as argument. Queries will include inferred statements and all contexts.

Parameters:

repository -

SesameRepositoryBackend

public SesameRepositoryBackend(org.openrdf.repository.Repository repository,
                       boolean includeInferred,
                       org.openrdf.model.Resource... contexts)

Initialise a new sesame backend using the repository.

Parameters:

repository -

includeInferred -

contexts -

Method Detail

getRepository

public org.openrdf.repository.Repository getRepository()

setRepository

public void setRepository(org.openrdf.repository.Repository repository)

createLiteral

public org.openrdf.model.Literal createLiteral(String content)

Create a literal node with the content passed as argument

Specified by:

createLiteral in interface NodeBackend<org.openrdf.model.Value>

Specified by:

createLiteral in class AbstractSesameBackend

Parameters:

content - string content to represent inside the literal

Returns:

a literal node in using the model used by this backend

createLiteral

public org.openrdf.model.Literal createLiteral(String content,
                                      Locale language,
                                      URI type)

Create a literal node with the content passed as argument

Specified by:

createLiteral in interface NodeBackend<org.openrdf.model.Value>

Specified by:

createLiteral in class AbstractSesameBackend

Parameters:

content - string content to represent inside the literal

Returns:

a literal node in using the model used by this backend

createURI

public org.openrdf.model.URI createURI(String uri)

Create a URI mode with the URI passed as argument

Specified by:

createURI in interface NodeBackend<org.openrdf.model.Value>

Specified by:

createURI in class AbstractSesameBackend

Parameters:

uri - URI of the resource to create

Returns:

a URI node using the model used by this backend

listObjects

public Collection<org.openrdf.model.Value> listObjects(org.openrdf.model.Value subject,
                                              org.openrdf.model.Value property)

List the objects of triples in the triple store underlying this backend that have the subject and property given as argument.

Specified by:

listObjects in interface RDFBackend<org.openrdf.model.Value>

Specified by:

listObjects in class AbstractSesameBackend

Parameters:

subject - the subject of the triples to look for

property - the property of the triples to look for

Returns:

all objects of triples with matching subject and property

listSubjects

public Collection<org.openrdf.model.Value> listSubjects(org.openrdf.model.Value property,
                                               org.openrdf.model.Value object)

List the subjects of triples in the triple store underlying this backend that have the object and property given as argument.

Specified by:

listSubjects in interface RDFBackend<org.openrdf.model.Value>

Specified by:

listSubjects in class AbstractSesameBackend

Parameters:

object - the object of the triples to look for

property - the property of the triples to look for

Returns:

all subjects of triples with matching object and property

Throws:

UnsupportedOperationException - in case reverse selection is not supported (e.g. when querying Linked Data)