org.apache.jena.sparql.util

Class DifferenceDatasetGraph

java.lang.Object

org.apache.jena.atlas.lib.Pair<T,T>

org.apache.jena.atlas.lib.PairOfSameType<DatasetGraph>

org.apache.jena.sparql.util.DyadicDatasetGraph

org.apache.jena.sparql.util.DifferenceDatasetGraph

All Implemented Interfaces:

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

public class DifferenceDatasetGraph
extends DyadicDatasetGraph

Nested Class Summary

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

Transactional.Promote

Constructor Summary

Constructors

Constructor and Description
DifferenceDatasetGraph(DatasetGraph left, DatasetGraph right, Context c)

Method Summary

Modifier and Type	Method and 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	containsGraph(Node graphNode) Does the DatasetGraph contain a specific named graph? Whether a dataset contains a graph if there are no triples is not defined - see the specific implementation.
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.
boolean	isEmpty() Test whether the dataset is empty
Iterator<Node>	listGraphNodes() Iterate over all names of named graphs
long	size() Get the size (number of named graphs) - may be -1 for unknown

Methods inherited from class org.apache.jena.sparql.util.DyadicDatasetGraph

abort, add, add, addGraph, begin, begin, begin, clear, close, commit, contains, delete, delete, deleteAny, end, find, find, find, findNG, getContext, getLock, getUnionGraph, isInTransaction, promote, removeGraph, setContext, setDefaultGraph, supportsTransactionAbort, supportsTransactions, transactionMode, transactionType

Methods inherited from class org.apache.jena.atlas.lib.PairOfSameType

apply, both, either, forEach

Methods inherited from class org.apache.jena.atlas.lib.Pair

car, cdr, create, equals, getLeft, getRight, hashCode, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

promote

Constructor Detail

DifferenceDatasetGraph

public DifferenceDatasetGraph(DatasetGraph left,
                              DatasetGraph right,
                              Context c)

Method Detail

getDefaultGraph

public Graph getDefaultGraph()

Description copied from interface: DatasetGraph

Get the default graph as a Jena Graph

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.

containsGraph

public boolean containsGraph(Node graphNode)

Description copied from interface: DatasetGraph

Does the DatasetGraph contain a specific named graph? 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 and this returns true always.

Returns:

boolean

listGraphNodes

public Iterator<Node> listGraphNodes()

Description copied from interface: DatasetGraph

Iterate over all names of named graphs

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

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 DyadicDatasetGraph

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 DyadicDatasetGraph