com.blazegraph.gremlin.structure

Class BlazeEdge

java.lang.Object

com.blazegraph.gremlin.structure.BlazeEdge

All Implemented Interfaces:

BlazeElement, BlazeReifiedElement, org.apache.tinkerpop.gremlin.structure.Edge, org.apache.tinkerpop.gremlin.structure.Element

public class BlazeEdge
extends Object
implements org.apache.tinkerpop.gremlin.structure.Edge, BlazeReifiedElement

Concrete edge implementation for Blazegraph.

Edge existence is represented as two triples as follows:

 
     :fromId :edgeId :toId .
     <<:fromId :edgeId :toId>> rdf:type :label .
 
 

Edge properties are represented as follows:

 
     <<:fromId :edgeId :toId>> :key "val" .
 
 

Author:

mikepersonick

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.structure.Edge

org.apache.tinkerpop.gremlin.structure.Edge.Exceptions

Field Summary

Fields

Modifier and Type	Field and Description
protected BlazeGraph	graph BlazeGraph instance this element belongs to.
protected com.bigdata.rdf.model.BigdataURI	label The Literal representation of the element label.
protected com.bigdata.rdf.model.BigdataURI	uri The URI representation of the element id.
protected BlazeValueFactory	vf The BlazeValueFactory provided by the graph for round-tripping values.

Fields inherited from interface org.apache.tinkerpop.gremlin.structure.Edge

DEFAULT_LABEL

Method Summary

Modifier and Type	Method and Description
Iterator<org.apache.tinkerpop.gremlin.structure.Vertex>	bothVertices()
boolean	equals(Object object) Delegates to ElementHelper.areEqual(Element, Object)
BlazeGraph	graph() Return the BlazeGraph instance.
int	hashCode() Delegates to ElementHelper.hashCode(Element)
String	id() Return element id.
org.apache.tinkerpop.gremlin.structure.Vertex	inVertex()
String	label() Return element label.
org.apache.tinkerpop.gremlin.structure.Vertex	outVertex()
<V> CloseableIterator<org.apache.tinkerpop.gremlin.structure.Property<V>>	properties(String... keys) Strength return type to CloseableIterator.
<V> BlazeProperty<V>	property(String key, V val) Strengthen return type to BlazeProperty.
com.bigdata.rdf.model.BigdataBNode	rdfId() Return the sid (reified statement) for this edge.
org.openrdf.model.URI	rdfLabel() Return the RDF representation of the label.
void	remove()
String	toString()
Iterator<org.apache.tinkerpop.gremlin.structure.Vertex>	vertices(org.apache.tinkerpop.gremlin.structure.Direction direction)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.blazegraph.gremlin.structure.BlazeReifiedElement

property

Methods inherited from interface com.blazegraph.gremlin.structure.BlazeElement

graph, keys, rdfLabel, values

Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Element

id, label, value

Field Detail

graph

protected final BlazeGraph graph

BlazeGraph instance this element belongs to.

vf

protected final BlazeValueFactory vf

The BlazeValueFactory provided by the graph for round-tripping values.

uri

protected final com.bigdata.rdf.model.BigdataURI uri

The URI representation of the element id.

label

protected final com.bigdata.rdf.model.BigdataURI label

The Literal representation of the element label.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

rdfId

public com.bigdata.rdf.model.BigdataBNode rdfId()

Return the sid (reified statement) for this edge.

Specified by:

rdfId in interface BlazeElement

Specified by:

rdfId in interface BlazeReifiedElement

See Also:

BlazeElement.rdfId()

remove

public void remove()

Specified by:

remove in interface org.apache.tinkerpop.gremlin.structure.Element

See Also:

Element.remove(), BlazeGraph.remove(BlazeReifiedElement)

property

public <V> BlazeProperty<V> property(String key,
                                     V val)

Strengthen return type to BlazeProperty.

Specified by:

property in interface BlazeReifiedElement

Specified by:

property in interface org.apache.tinkerpop.gremlin.structure.Element

properties

public <V> CloseableIterator<org.apache.tinkerpop.gremlin.structure.Property<V>> properties(String... keys)

Strength return type to CloseableIterator. You MUST close this iterator when finished.

Specified by:

properties in interface BlazeElement

Specified by:

properties in interface BlazeReifiedElement

Specified by:

properties in interface org.apache.tinkerpop.gremlin.structure.Edge

Specified by:

properties in interface org.apache.tinkerpop.gremlin.structure.Element

outVertex

public org.apache.tinkerpop.gremlin.structure.Vertex outVertex()

Specified by:

outVertex in interface org.apache.tinkerpop.gremlin.structure.Edge

See Also:

Edge.outVertex()

inVertex

public org.apache.tinkerpop.gremlin.structure.Vertex inVertex()

Specified by:

inVertex in interface org.apache.tinkerpop.gremlin.structure.Edge

See Also:

Edge.inVertex()

bothVertices

public Iterator<org.apache.tinkerpop.gremlin.structure.Vertex> bothVertices()

Specified by:

bothVertices in interface org.apache.tinkerpop.gremlin.structure.Edge

See Also:

Edge.bothVertices()

vertices

public Iterator<org.apache.tinkerpop.gremlin.structure.Vertex> vertices(org.apache.tinkerpop.gremlin.structure.Direction direction)

Specified by:

vertices in interface org.apache.tinkerpop.gremlin.structure.Edge

See Also:

Edge.vertices(Direction)

id

public String id()

Return element id. Tinkerpop3 interface method.

Specified by:

id in interface org.apache.tinkerpop.gremlin.structure.Element

See Also:

Element.id()

label

public String label()

Return element label. Tinkerpop3 interface method.

Specified by:

label in interface org.apache.tinkerpop.gremlin.structure.Element

See Also:

Element.label()

rdfLabel

public org.openrdf.model.URI rdfLabel()

Return the RDF representation of the label.

Specified by:

rdfLabel in interface BlazeElement

See Also:

BlazeElement.rdfLabel()

graph

public BlazeGraph graph()

Return the BlazeGraph instance.

Specified by:

graph in interface BlazeElement

Specified by:

graph in interface org.apache.tinkerpop.gremlin.structure.Element

hashCode

public int hashCode()

Delegates to ElementHelper.hashCode(Element)

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Delegates to ElementHelper.areEqual(Element, Object)

Overrides:

equals in class Object