Package org.apache.jena.sparql.core

Class DatasetGraphFilteredView

java.lang.Object

org.apache.jena.sparql.core.DatasetGraphWrapper

org.apache.jena.sparql.core.DatasetGraphReadOnly

org.apache.jena.sparql.core.DatasetGraphFilteredView

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, DatasetGraph, DatasetGraphWrapperView, Transactional

public class DatasetGraphFilteredView
extends DatasetGraphReadOnly
implements DatasetGraphWrapperView

A read-only DatasetGraph that applies a filter testing all triples and quads returned by accessing the data. Only quads where the filter tests for "true" are exposed.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.jena.sparql.core.Transactional

Transactional.Promote

Constructor Summary

Constructors

Constructor	Description
DatasetGraphFilteredView(DatasetGraph dsg, java.util.function.Predicate<Quad> filter, java.util.Collection<Node> visibleGraphs)

Method Summary

Modifier and Type	Method	Description
boolean	contains(Node g, Node s, Node p, Node o)	Test whether the dataset (including default graph) contains a quad - may include wildcards, Node.ANY or null
boolean	contains(Quad quad)	Test whether the dataset contains a quad (including default graph)- may include wildcards, Node.ANY or null
java.util.Iterator<Quad>	find()	Iterate over all quads in the dataset graph
java.util.Iterator<Quad>	find(Node g, Node s, Node p, Node o)	Find matching quads in the dataset (including default graph) - may include wildcards, Node.ANY or null
java.util.Iterator<Quad>	find(Quad quad)	Find matching quads in the dataset - may include wildcards, Node.ANY or null
java.util.Iterator<Quad>	findNG(Node g, Node s, Node p, Node o)	Find matching quads in the dataset in named graphs only - may include wildcards, Node.ANY or null
Graph	getDefaultGraph()	Get the default graph as a Jena Graph
Graph	getGraph(Node graphNode)	Get the graph named by graphNode : returns null when there is no such graph.
Graph	getUnionGraph()	Return a Graph that is the union of all named graphs in this dataset.
boolean	isEmpty()	Test whether the dataset is empty
java.util.Iterator<Node>	listGraphNodes()	Iterate over all names of named graphs
long	size()	Get the size (number of named graphs) - may be -1 for unknown
java.lang.String	toString()

Methods inherited from class org.apache.jena.sparql.core.DatasetGraphReadOnly

begin, close

Methods inherited from class org.apache.jena.sparql.core.DatasetGraphWrapper

abort, add, add, addGraph, begin, begin, clear, commit, containsGraph, delete, delete, deleteAny, end, getBase, getBaseForQuery, getContext, getLock, getWrapped, isInTransaction, prefixes, promote, promote, removeGraph, setDefaultGraph, supportsTransactionAbort, supportsTransactions, sync, transactionMode, transactionType, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.sparql.core.DatasetGraph

add, add, addAll, addGraph, clear, close, containsGraph, delete, delete, deleteAny, getContext, getLock, prefixes, removeGraph, setDefaultGraph, supportsTransactionAbort, supportsTransactions

Methods inherited from interface org.apache.jena.sparql.core.Transactional

abort, begin, begin, begin, calc, calculate, calculateRead, calculateWrite, commit, end, exec, execute, executeRead, executeWrite, isInTransaction, promote, promote, transactionMode, transactionType

Constructor Detail

DatasetGraphFilteredView

public DatasetGraphFilteredView(DatasetGraph dsg,
                                java.util.function.Predicate<Quad> filter,
                                java.util.Collection<Node> visibleGraphs)

Method Detail

getDefaultGraph

public Graph getDefaultGraph()

Description copied from interface: DatasetGraph

Get the default graph as a Jena Graph

Specified by:

getDefaultGraph in interface DatasetGraph

Overrides:

getDefaultGraph in class DatasetGraphReadOnly

getGraph

public Graph getGraph(Node graphNode)

Description copied from interface: DatasetGraph

Get the graph named by graphNode : returns null when there is no such graph. NB Whether a dataset contains a graph if there are no triples is not defined - see the specific implementation. Some datasets are "open" - they have all graphs even if no triples.

Specified by:

getGraph in interface DatasetGraph

Overrides:

getGraph in class DatasetGraphReadOnly

listGraphNodes

public java.util.Iterator<Node> listGraphNodes()

Description copied from interface: DatasetGraph

Iterate over all names of named graphs

Specified by:

listGraphNodes in interface DatasetGraph

Overrides:

listGraphNodes in class DatasetGraphWrapper

size

public long size()

Description copied from interface: DatasetGraph

Get the size (number of named graphs) - may be -1 for unknown

Specified by:

size in interface DatasetGraph

Overrides:

size in class DatasetGraphWrapper

getUnionGraph

public Graph getUnionGraph()

Description copied from interface: DatasetGraph

Return a Graph that is the union of all named graphs in this dataset. This union graph is read-only (its prefix mapping in the current JVM may be changed but that may not persist).

Specified by:

getUnionGraph in interface DatasetGraph

Overrides:

getUnionGraph in class DatasetGraphWrapper

find

public java.util.Iterator<Quad> find()

Description copied from interface: DatasetGraph

Iterate over all quads in the dataset graph

Specified by:

find in interface DatasetGraph

Overrides:

find in class DatasetGraphWrapper

find

public java.util.Iterator<Quad> find(Node g,
                                     Node s,
                                     Node p,
                                     Node o)

Description copied from interface: DatasetGraph

Find matching quads in the dataset (including default graph) - may include wildcards, Node.ANY or null

Specified by:

find in interface DatasetGraph

Overrides:

find in class DatasetGraphWrapper

See Also:

Graph.find(Node,Node,Node)

find

public java.util.Iterator<Quad> find(Quad quad)

Description copied from interface: DatasetGraph

Find matching quads in the dataset - may include wildcards, Node.ANY or null

Specified by:

find in interface DatasetGraph

Overrides:

find in class DatasetGraphWrapper

See Also:

Graph.find(Triple)

findNG

public java.util.Iterator<Quad> findNG(Node g,
                                       Node s,
                                       Node p,
                                       Node o)

Description copied from interface: DatasetGraph

Find matching quads in the dataset in named graphs only - may include wildcards, Node.ANY or null

Specified by:

findNG in interface DatasetGraph

Overrides:

findNG in class DatasetGraphWrapper

See Also:

Graph.find(Node,Node,Node)

contains

public boolean contains(Node g,
                        Node s,
                        Node p,
                        Node o)

Description copied from interface: DatasetGraph

Test whether the dataset (including default graph) contains a quad - may include wildcards, Node.ANY or null

Specified by:

contains in interface DatasetGraph

Overrides:

contains in class DatasetGraphWrapper

contains

public boolean contains(Quad quad)

Description copied from interface: DatasetGraph

Test whether the dataset contains a quad (including default graph)- may include wildcards, Node.ANY or null

Specified by:

contains in interface DatasetGraph

Overrides:

contains in class DatasetGraphWrapper

isEmpty

public boolean isEmpty()

Description copied from interface: DatasetGraph

Test whether the dataset is empty

Specified by:

isEmpty in interface DatasetGraph

Overrides:

isEmpty in class DatasetGraphWrapper

toString

public java.lang.String toString()

Overrides:

toString in class DatasetGraphWrapper