Package be.ugent.rml.store

Class RDF4JStore

java.lang.Object

be.ugent.rml.store.QuadStore

be.ugent.rml.store.RDF4JStore

public class RDF4JStore
extends QuadStore

Implementation of QuadStore with RDF4J Package-private

Constructor Summary

Constructors

Constructor	Description
RDF4JStore()

Method Summary

Modifier and Type	Method	Description
void	addQuad(Term subject, Term predicate, Term object, Term graph)	Add given Quad to store
boolean	contains(Term subject, Term predicate, Term object, Term graph)	True if Quad matching input is present in store.
void	copyNameSpaces(QuadStore store)	Copy namespaces between stores.
boolean	equals(Object o)
org.eclipse.rdf4j.model.Model	getModel()	TODO remove all need for this.
List<Quad>	getQuads(Term subject, Term predicate, Term object, Term graph)	Get all Quads in store matching arguments.
boolean	isEmpty()	True if RDF quads present is 0
boolean	isIsomorphic(QuadStore store)	Test if given store and this store are isomorphic RDF graph representations
boolean	isSubset(QuadStore store)	Test if given store is subset of this store
void	read(InputStream is, String base, org.eclipse.rdf4j.rio.RDFFormat format)	Read RDF to QuadStore TODO use class or enum for input format
void	removeDuplicates()	Remove duplicate quads
void	removeQuads(Term subject, Term predicate, Term object, Term graph)	Remove all Quads matching input from store.
int	size()	Number of RDF quads
void	write(Writer out, String format)	Write out the QuadStore in given format TODO use class or enum for output format

Methods inherited from class be.ugent.rml.store.QuadStore

addQuad, addQuad, addQuads, contains, getQuad, getQuad, getQuads, removeQuads, removeQuads, removeQuads, renameAll, toSortedString, toString, tryPropertyTranslation, write, write

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RDF4JStore

public RDF4JStore()

Method Detail

removeDuplicates

public void removeDuplicates()

Description copied from class: QuadStore

Remove duplicate quads

Specified by:

removeDuplicates in class QuadStore

addQuad

public void addQuad(Term subject,
                    Term predicate,
                    Term object,
                    Term graph)

Description copied from class: QuadStore

Add given Quad to store

Specified by:

addQuad in class QuadStore

getQuads

public List<Quad> getQuads(Term subject,
                           Term predicate,
                           Term object,
                           Term graph)

Description copied from class: QuadStore

Get all Quads in store matching arguments. Null can be used as a wildcard.

Specified by:

getQuads in class QuadStore

Returns:

copyNameSpaces

public void copyNameSpaces(QuadStore store)

Description copied from class: QuadStore

Copy namespaces between stores. Used in retaining the prefixes in the mapping file in the output. TODO define general Namespace class to use between QuadStore instances

Specified by:

copyNameSpaces in class QuadStore

Parameters:

store - QuadStore with namespaces to be copied to this store

read

public void read(InputStream is,
                 String base,
                 org.eclipse.rdf4j.rio.RDFFormat format)
          throws Exception

Description copied from class: QuadStore

Read RDF to QuadStore TODO use class or enum for input format

Specified by:

read in class QuadStore

Parameters:

is - Stream of RDF in given format

base - Base URL

format - Given format for RDF

Throws:

Exception

write

public void write(Writer out,
                  String format)
           throws Exception

Description copied from class: QuadStore

Write out the QuadStore in given format TODO use class or enum for output format

Specified by:

write in class QuadStore

Parameters:

out - Writer output location

format - QuadStore format (.TTL)

Throws:

Exception

isEmpty

public boolean isEmpty()

Description copied from class: QuadStore

True if RDF quads present is 0

Specified by:

isEmpty in class QuadStore

Returns:

boolean

size

public int size()

Description copied from class: QuadStore

Number of RDF quads

Specified by:

size in class QuadStore

Returns:

int

getModel

public org.eclipse.rdf4j.model.Model getModel()

TODO remove all need for this. Currently: - store equality/isomorphism - namespace passing - store difference - store isSubset

equals

public boolean equals(Object o)

Specified by:

equals in class QuadStore

removeQuads

public void removeQuads(Term subject,
                        Term predicate,
                        Term object,
                        Term graph)

Description copied from class: QuadStore

Remove all Quads matching input from store.

Specified by:

removeQuads in class QuadStore

contains

public boolean contains(Term subject,
                        Term predicate,
                        Term object,
                        Term graph)

Description copied from class: QuadStore

True if Quad matching input is present in store.

Specified by:

contains in class QuadStore

Returns:

isIsomorphic

public boolean isIsomorphic(QuadStore store)

Description copied from class: QuadStore

Test if given store and this store are isomorphic RDF graph representations

Specified by:

isIsomorphic in class QuadStore

Returns:

isSubset

public boolean isSubset(QuadStore store)

Description copied from class: QuadStore

Test if given store is subset of this store

Specified by:

isSubset in class QuadStore

Returns: