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

Class BackStep<S,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.BackStep<S,E>

All Implemented Interfaces:

Serializable, Cloneable, Iterator<Traverser<E>>, Step<S,E>, EngineDependent

public final class BackStep<S,E>
extends MapStep<S,E>
implements EngineDependent

Author:

Marko A. Rodriguez (http://markorodriguez.com)

See Also:

Serialized Form

Field Summary

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

id, label, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdSetByChild

Constructor Summary

Constructors

Constructor and Description
BackStep(Traversal.Admin traversal, String stepLabel)

Method Summary

Modifier and Type	Method and Description
Set<TraverserRequirement>	getRequirements() Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly.
protected E	map(Traverser.Admin<S> traverser)
void	onEngine(TraversalEngine traversalEngine)
String	toString()

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

processNextStart

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

addStart, addStarts, clone, getId, getLabel, getNextStep, getPreviousStep, getTraversal, hasNext, next, reset, setId, setLabel, setNextStep, setPreviousStep, setTraversal

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

BackStep

public BackStep(Traversal.Admin traversal,
                String stepLabel)

Method Detail

map

protected E map(Traverser.Admin<S> traverser)

Specified by:

map in class MapStep<S,E>

onEngine

public void onEngine(TraversalEngine traversalEngine)

Specified by:

onEngine in interface EngineDependent

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<S,E>

Overrides:

getRequirements in class MapStep<S,E>

Returns:

the set of requirements

toString

public String toString()

Overrides:

toString in class AbstractStep<S,E>