public final class SumGlobalStep<S extends Number> extends ReducingBarrierStep<S,S>
ReducingBarrierStep.NonEmittingSeed
hasProcessedOnce, NON_EMITTING_SEED, reducingBiOperator, seedSupplier
id, labels, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdAndLabelsSetByChild
Constructor and Description |
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SumGlobalStep(Traversal.Admin traversal) |
Modifier and Type | Method and Description |
---|---|
protected S |
generateSeedFromStarts()
Advances the starts until a non-null value is found or simply returns
null . |
Set<TraverserRequirement> |
getRequirements()
Provide the necessary
TraverserRequirement that must be met by the traverser in order for the step to
function properly. |
void |
processAllStarts()
Process all left traversers by do not yield the resultant output.
|
S |
projectTraverser(Traverser.Admin<S> traverser) |
addBarrier, clone, done, getBiOperator, getMemoryComputeKey, getSeedSupplier, hasNextBarrier, nextBarrier, processNextStart, reset, setReducingBiOperator, setSeedSupplier
addLabel, addStart, addStarts, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hashCode, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, setId, setNextStep, setPreviousStep, setTraversal, toString
finalize, getClass, notify, notifyAll, wait, wait, wait
generateFinalResult
forEachRemaining, remove
public SumGlobalStep(Traversal.Admin traversal)
protected S generateSeedFromStarts()
null
. In this way, an all
null
stream will result in null
.generateSeedFromStarts
in class ReducingBarrierStep<S extends Number,S extends Number>
public void processAllStarts()
Barrier
ReducingBarrierStep
, where traversers can be processed "on the fly" and thus, reduce memory consumption.processAllStarts
in interface Barrier<S extends Number>
processAllStarts
in class ReducingBarrierStep<S extends Number,S extends Number>
public S projectTraverser(Traverser.Admin<S> traverser)
projectTraverser
in class ReducingBarrierStep<S extends Number,S extends Number>
public Set<TraverserRequirement> getRequirements()
Step
TraverserRequirement
that must be met by the traverser in order for the step to
function properly. The provided default implements returns an empty set.Copyright © 2013–2022 Apache Software Foundation. All rights reserved.