Package org.apache.tinkerpop.gremlin.process.traversal.step.map

Class ElementMapStep<K,E>

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<S,E>

org.apache.tinkerpop.gremlin.process.traversal.step.map.MapStep<S,E>

org.apache.tinkerpop.gremlin.process.traversal.step.map.ScalarMapStep<Element,Map<K,E>>

org.apache.tinkerpop.gremlin.process.traversal.step.map.ElementMapStep<K,E>

All Implemented Interfaces:

Serializable, AutoCloseable, Cloneable, Iterator<Traverser.Admin<Map<K,E>>>, Step<Element,Map<K,E>>, GraphComputing, PopContaining, TraversalParent

public class ElementMapStep<K,E>
extends ScalarMapStep<Element,Map<K,E>>
implements TraversalParent, GraphComputing

Converts a Element to a Map.

Author:

Marko A. Rodriguez (http://markorodriguez.com), Daniel Kuppitz (http://gremlin.guru), Stephen Mallette (http://stephen.genoprime.com)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.PopContaining

PopContaining.PopInstruction

Field Summary

Fields

Modifier and Type	Field	Description
protected String[]	propertyKeys

Fields inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep

id, labels, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdAndLabelsSetByChild

Constructor Summary

Constructors

Constructor	Description
ElementMapStep(Traversal.Admin traversal, String... propertyKeys)

Method Summary

Modifier and Type	Method	Description
String[]	getPropertyKeys()
Set<TraverserRequirement>	getRequirements()	Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly.
protected Map<Object,Object>	getVertexStructure(Vertex v)
int	hashCode()
boolean	isOnGraphComputer()
protected Map<K,E>	map(Traverser.Admin<Element> traverser)
void	onGraphComputer()	The step will be executing on a GraphComputer.
String	toString()

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.map.ScalarMapStep

processNextStart

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep

addLabel, addStart, addStarts, clearLabels, clone, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, reset, setId, setNextStep, setPreviousStep, setTraversal

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.GraphComputing

atMaster

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.Step

equals

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.TraversalParent

addGlobalChild, addLocalChild, asStep, close, getGlobalChildren, getLocalChildren, getPopInstructions, getSelfAndChildRequirements, integrateChild, removeGlobalChild, removeLocalChild, replaceLocalChild

Field Detail

propertyKeys

protected final String[] propertyKeys

Constructor Detail

ElementMapStep

public ElementMapStep(Traversal.Admin traversal,
                      String... propertyKeys)

Method Detail

map

protected Map<K,E> map(Traverser.Admin<Element> traverser)

Specified by:

map in class ScalarMapStep<Element,Map<K,E>>

getVertexStructure

protected Map<Object,Object> getVertexStructure(Vertex v)

onGraphComputer

public void onGraphComputer()

Description copied from interface: GraphComputing

The step will be executing on a GraphComputer.

Specified by:

onGraphComputer in interface GraphComputing

isOnGraphComputer

public boolean isOnGraphComputer()

getPropertyKeys

public String[] getPropertyKeys()

toString

public String toString()

Overrides:

toString in class AbstractStep<Element,Map<K,E>>

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractStep<Element,Map<K,E>>

getRequirements

public Set<TraverserRequirement> getRequirements()

Description copied from interface: Step

Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly. The provided default implements returns an empty set.

Specified by:

getRequirements in interface Step<K,E>

Returns:

the set of requirements