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

Class TailGlobalStep<S>

java.lang.Object

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

org.apache.tinkerpop.gremlin.process.traversal.step.filter.TailGlobalStep<S>

All Implemented Interfaces:

Serializable, Cloneable, Iterator<Traverser.Admin<S>>, Step<S,S>, Barrier<TraverserSet<S>>, Bypassing, TailGlobalStepContract<S>, FilteringBarrier<TraverserSet<S>>, MemoryComputing<TraverserSet<S>>

public final class TailGlobalStep<S>
extends AbstractStep<S,S>
implements TailGlobalStepContract<S>

Author:

Matt Frantz (http://github.com/mhfrantz)

See Also:

Serialized Form

Field Summary

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

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

Fields inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.filter.TailGlobalStepContract

CONCRETE_STEPS

Constructor Summary

Constructors

Constructor	Description
TailGlobalStep(Traversal.Admin traversal, long limit)

Method Summary

Modifier and Type	Method	Description
TailGlobalStep<S>	clone()	Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication.
Long	getLimit()
MemoryComputeKey<TraverserSet<S>>	getMemoryComputeKey()	The MemoryComputeKey that will be used by this step.
Set<TraverserRequirement>	getRequirements()	Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly.
int	hashCode()
void	processAllStarts()	Process all left traversers by do not yield the resultant output.
Traverser.Admin<S>	processNextStart()
void	reset()	Reset the state of the step such that it has no incoming starts.
void	setBypass(boolean bypass)
String	toString()

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

addLabel, addStart, addStarts, clearLabels, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, 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.Barrier

done

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

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

addLabel, addStart, addStarts, clearLabels, equals, getId, getLabels, getNextStep, getPreviousStep, getTraversal, hasStarts, removeLabel, setId, setNextStep, setPreviousStep, setTraversal

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

addBarrier, getEmptyBarrier, getLimitAsGValue, getStarts, hasNextBarrier, nextBarrier

Constructor Detail

TailGlobalStep

public TailGlobalStep(Traversal.Admin traversal,
                      long limit)

Method Detail

setBypass

public void setBypass(boolean bypass)

Specified by:

setBypass in interface Bypassing

processNextStart

public Traverser.Admin<S> processNextStart()

Specified by:

processNextStart in class AbstractStep<S,S>

reset

public void reset()

Description copied from interface: Step

Reset the state of the step such that it has no incoming starts. Internal states are to be reset, but any sideEffect data structures are not to be recreated.

Specified by:

reset in interface Step<S,S>

Overrides:

reset in class AbstractStep<S,S>

toString

public String toString()

Overrides:

toString in class AbstractStep<S,S>

clone

public TailGlobalStep<S> 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,S>

Overrides:

clone in class AbstractStep<S,S>

Returns:

The cloned step

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractStep<S,S>

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,S>

Returns:

the set of requirements

getMemoryComputeKey

public MemoryComputeKey<TraverserSet<S>> getMemoryComputeKey()

Description copied from interface: MemoryComputing

The MemoryComputeKey that will be used by this step.

Specified by:

getMemoryComputeKey in interface MemoryComputing<S>

Returns:

the MemoryComputeKey to use

processAllStarts

public void processAllStarts()

Description copied from interface: Barrier

Process all left traversers by do not yield the resultant output. This method is useful for steps like ReducingBarrierStep, where traversers can be processed "on the fly" and thus, reduce memory consumption.

Specified by:

processAllStarts in interface Barrier<S>

getLimit

public Long getLimit()

Specified by:

getLimit in interface TailGlobalStepContract<S>