org.apache.commons.rdf.simple

Class DatasetGraphView

java.lang.Object

org.apache.commons.rdf.simple.DatasetGraphView

All Implemented Interfaces:

AutoCloseable, Graph, GraphLike<Triple>

public class DatasetGraphView
extends Object
implements Graph

A Graph view on a Dataset.

This view is backed by a Dataset, and can be constructed in two ways:

DatasetGraphView(Dataset)

Expose a union graph view of the Dataset, where all the Quads of the Dataset is represented as a Triple. Adding triples will add them to the default graph, while removing triples will remove from all graphs.

DatasetGraphView(Dataset, BlankNodeOrIRI)

Expose a particular graph of the Dataset, either named by an IRI, a BlankNode, or null for the default graph.

Changes in the Graph are reflected directly in the Dataset and vice versa. This class is thread-safe is the underlying Dataset is thread-safe.

Constructor Summary

Constructors

Constructor and Description
DatasetGraphView(Dataset dataset)
DatasetGraphView(Dataset dataset, BlankNodeOrIRI namedGraph)

Method Summary

Modifier and Type	Method and Description
void	add(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)
void	add(Triple triple)
void	clear()
void	close()
boolean	contains(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)
boolean	contains(Triple triple)
void	remove(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)
void	remove(Triple triple)
long	size()
Stream<? extends Triple>	stream()
Stream<? extends Triple>	stream(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.rdf.api.Graph

getTriples, getTriples, iterate, iterate

Constructor Detail

DatasetGraphView

public DatasetGraphView(Dataset dataset)

DatasetGraphView

public DatasetGraphView(Dataset dataset,
                        BlankNodeOrIRI namedGraph)

Method Detail

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Graph

Throws:

Exception

add

public void add(Triple triple)

Specified by:

add in interface Graph

Specified by:

add in interface GraphLike<Triple>

add

public void add(BlankNodeOrIRI subject,
                IRI predicate,
                RDFTerm object)

Specified by:

add in interface Graph

contains

public boolean contains(Triple triple)

Specified by:

contains in interface Graph

Specified by:

contains in interface GraphLike<Triple>

contains

public boolean contains(BlankNodeOrIRI subject,
                        IRI predicate,
                        RDFTerm object)

Specified by:

contains in interface Graph

remove

public void remove(Triple triple)

Specified by:

remove in interface Graph

Specified by:

remove in interface GraphLike<Triple>

remove

public void remove(BlankNodeOrIRI subject,
                   IRI predicate,
                   RDFTerm object)

Specified by:

remove in interface Graph

clear

public void clear()

Specified by:

clear in interface Graph

Specified by:

clear in interface GraphLike<Triple>

size

public long size()

Specified by:

size in interface Graph

Specified by:

size in interface GraphLike<Triple>

stream

public Stream<? extends Triple> stream()

Specified by:

stream in interface Graph

Specified by:

stream in interface GraphLike<Triple>

stream

public Stream<? extends Triple> stream(BlankNodeOrIRI subject,
                                       IRI predicate,
                                       RDFTerm object)

Specified by:

stream in interface Graph