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

Class TraversalSelectStep<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.TraversalSelectStep<S,E>

All Implemented Interfaces:

Serializable, AutoCloseable, Cloneable, Iterator<Traverser.Admin<E>>, Step<S,E>, ByModulating, PathProcessor, TraversalParent

public final class TraversalSelectStep<S,E>
extends MapStep<S,E>
implements TraversalParent, PathProcessor, ByModulating

Author:

Daniel Kuppitz (http://gremlin.guru)

See Also:

Serialized Form

Nested Class Summary

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

PathProcessor.ElementRequirement

Field Summary

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 and Description
TraversalSelectStep(Traversal.Admin traversal, Pop pop, Traversal<S,E> keyTraversal)

Method Summary

Modifier and Type	Method and Description
TraversalSelectStep<S,E>	clone() Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication.
Set<String>	getKeepLabels()
List<Traversal.Admin<?,?>>	getLocalChildren()
Pop	getPop()
Set<TraverserRequirement>	getRequirements() Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly.
int	hashCode()
protected E	map(Traverser.Admin<S> traverser)
void	modulateBy(Traversal.Admin<?,?> selectTraversal)
protected Traverser.Admin<E>	processNextStart()
void	removeLocalChild(Traversal.Admin<?,?> traversal)
void	setKeepLabels(Set<String> keepLabels)
void	setTraversal(Traversal.Admin<?,?> parentTraversal) Set the Traversal that this step is contained within.
String	toString()

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

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

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.TraversalParent

addGlobalChild, addLocalChild, asStep, close, getGlobalChildren, getSelfAndChildRequirements, integrateChild, removeGlobalChild

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

getMaxRequirement, processTraverserPathLabels

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

modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy, modulateBy

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

equals

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

TraversalSelectStep

public TraversalSelectStep(Traversal.Admin traversal,
                           Pop pop,
                           Traversal<S,E> keyTraversal)

Method Detail

map

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

Specified by:

map in class MapStep<S,E>

toString

public String toString()

Overrides:

toString in class AbstractStep<S,E>

clone

public TraversalSelectStep<S,E> clone()

Description copied from interface: Step

Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication. When cloning a step, it is important that the steps, the cloned step is equivalent to the state of the step when Step.reset() is called. Moreover, the previous and next steps should be set to EmptyStep.

Specified by:

clone in interface Step<S,E>

Overrides:

clone in class AbstractStep<S,E>

Returns:

The cloned step

setTraversal

public void setTraversal(Traversal.Admin<?,?> parentTraversal)

Description copied from interface: Step

Set the Traversal that this step is contained within.

Specified by:

setTraversal in interface Step<S,E>

Overrides:

setTraversal in class AbstractStep<S,E>

Parameters:

parentTraversal - the new traversal for this step

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractStep<S,E>

getLocalChildren

public List<Traversal.Admin<?,?>> getLocalChildren()

Specified by:

getLocalChildren in interface TraversalParent

removeLocalChild

public void removeLocalChild(Traversal.Admin<?,?> traversal)

Specified by:

removeLocalChild in interface TraversalParent

modulateBy

public void modulateBy(Traversal.Admin<?,?> selectTraversal)

Specified by:

modulateBy in interface ByModulating

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>

Returns:

the set of requirements

getPop

public Pop getPop()

setKeepLabels

public void setKeepLabels(Set<String> keepLabels)

Specified by:

setKeepLabels in interface PathProcessor

getKeepLabels

public Set<String> getKeepLabels()

Specified by:

getKeepLabels in interface PathProcessor

processNextStart

protected Traverser.Admin<E> processNextStart()

Overrides:

processNextStart in class MapStep<S,E>