Package org.apache.jena.sparql.core

Class Quad

java.lang.Object

org.apache.jena.sparql.core.Quad

All Implemented Interfaces:

java.io.Serializable

public class Quad
extends java.lang.Object
implements java.io.Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static Quad	ANY	A Quad that has a wildcard in all fields.
static Node	defaultGraphIRI	Name of the default for explicit use in GRAPH
static Node	defaultGraphNodeGenerated	Name of the default graph as used by parsers and in quad form of algebra.
static Node	tripleInQuad	Name of the non-graph when a quad is really a triple - also parsing of triples formats (and the default graph when parsing N-Quads or TriG) Not for access to the default graph by name - use Quad.defaultGraphIRI.
static Node	unionGraph	Name of the merge of all named graphs (use this for the graph of all named graphs)

Constructor Summary

Constructors

Constructor	Description
Quad(Node g, Node s, Node p, Node o)
Quad(Node graph, Triple triple)

Method Summary

Modifier and Type	Method	Description
Triple	asTriple()	Get as a triple - useful because quads often come in blocks for the same graph
static Quad	create(Node g, Node s, Node p, Node o)
static Quad	create(Node g, Triple t)
boolean	equals(java.lang.Object other)
Node	getGraph()
Node	getObject()
Node	getPredicate()
Node	getSubject()
int	hashCode()
boolean	isConcrete()
boolean	isDefaultGraph()	Default, concrete graph (either generated or explicitly named)
static boolean	isDefaultGraph(Node node)	Default, concrete graph (either generated or explicitly named) -- not triple-in-quad
boolean	isDefaultGraphExplicit()	Default, concrete graph via generated URI (not explicitly, named)
static boolean	isDefaultGraphExplicit(Node node)	Default, explicitly named concrete graph
boolean	isDefaultGraphGenerated()	Default graph, explicitly named (not generated)
static boolean	isDefaultGraphGenerated(Node node)	Test whether this is a quad for the default graph (not the default graphs by explicit name)
boolean	isLegalAsData()	Is this quad a legal data quad (legal data triple, IRI for graph)
boolean	isTriple()	Is it really a triple?
boolean	isUnionGraph()	node used for the RDF merge of named graphs
static boolean	isUnionGraph(Node node)	Default, concrete graph (either generated or explicitly named) -- not triple-in-quad
boolean	matches(Node g, Node s, Node p, Node o)
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

defaultGraphIRI

public static final Node defaultGraphIRI

Name of the default for explicit use in GRAPH

defaultGraphNodeGenerated

public static final Node defaultGraphNodeGenerated

Name of the default graph as used by parsers and in quad form of algebra. Not for access to the default graph by name - use Quad.defaultGraphIRI.

unionGraph

public static final Node unionGraph

Name of the merge of all named graphs (use this for the graph of all named graphs)

tripleInQuad

public static final Node tripleInQuad

Name of the non-graph when a quad is really a triple - also parsing of triples formats (and the default graph when parsing N-Quads or TriG) Not for access to the default graph by name - use Quad.defaultGraphIRI.

ANY

public static final Quad ANY

A Quad that has a wildcard in all fields.

Constructor Detail

Quad

public Quad(Node graph,
            Triple triple)

Quad

public Quad(Node g,
            Node s,
            Node p,
            Node o)

Method Detail

create

public static Quad create(Node g,
                          Node s,
                          Node p,
                          Node o)

create

public static Quad create(Node g,
                          Triple t)

getGraph

public final Node getGraph()

getSubject

public final Node getSubject()

getPredicate

public final Node getPredicate()

getObject

public final Node getObject()

asTriple

public Triple asTriple()

Get as a triple - useful because quads often come in blocks for the same graph

isConcrete

public boolean isConcrete()

isDefaultGraphGenerated

public static boolean isDefaultGraphGenerated(Node node)

Test whether this is a quad for the default graph (not the default graphs by explicit name)

isDefaultGraphExplicit

public static boolean isDefaultGraphExplicit(Node node)

Default, explicitly named concrete graph

isDefaultGraph

public static boolean isDefaultGraph(Node node)

Default, concrete graph (either generated or explicitly named) -- not triple-in-quad

isUnionGraph

public static boolean isUnionGraph(Node node)

Default, concrete graph (either generated or explicitly named) -- not triple-in-quad

isDefaultGraphExplicit

public boolean isDefaultGraphExplicit()

Default, concrete graph via generated URI (not explicitly, named)

isDefaultGraphGenerated

public boolean isDefaultGraphGenerated()

Default graph, explicitly named (not generated)

isDefaultGraph

public boolean isDefaultGraph()

Default, concrete graph (either generated or explicitly named)

isUnionGraph

public boolean isUnionGraph()

node used for the RDF merge of named graphs

isTriple

public boolean isTriple()

Is it really a triple?

isLegalAsData

public boolean isLegalAsData()

Is this quad a legal data quad (legal data triple, IRI for graph)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

matches

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object