org.janusgraph.graphdb.tinkerpop.optimize.step

Class JanusGraphMixedIndexAggStep<S>

java.lang.Object

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

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

org.janusgraph.graphdb.tinkerpop.optimize.step.JanusGraphMixedIndexAggStep<S>

All Implemented Interfaces:

Serializable, Cloneable, Iterator<org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<Number>>, org.apache.tinkerpop.gremlin.process.traversal.Step<S,Number>, org.apache.tinkerpop.gremlin.process.traversal.step.Barrier<Number>, org.apache.tinkerpop.gremlin.process.traversal.step.Generating<Number,Number>, org.apache.tinkerpop.gremlin.process.traversal.step.MemoryComputing<Number>, org.apache.tinkerpop.gremlin.process.traversal.step.Profiling

public class JanusGraphMixedIndexAggStep<S>
extends org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep<S,Number>
implements org.apache.tinkerpop.gremlin.process.traversal.step.Profiling

A custom step similar to CountGlobalStep but uses mixed index query to directly fetch number of satisfying elements without actually fetching the elements.

Author:

Boxuan Li (liboxuan@connect.hku.hk)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep

org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep.NonEmittingSeed

Field Summary

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

hasProcessedOnce, NON_EMITTING_SEED, reducingBiOperator, seedSupplier

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
JanusGraphMixedIndexAggStep(JanusGraphStep janusGraphStep, org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal, Aggregation agg)

Method Summary

Modifier and Type	Method and Description
MixedIndexAggQuery	getMixedIndexAggQuery()
org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<Number>	processNextStart()
Number	projectTraverser(org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<S> traverser)
void	setMetrics(org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics metrics)
String	toString()

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

addBarrier, clone, done, generateSeedFromStarts, getBiOperator, getMemoryComputeKey, getSeedSupplier, hasNextBarrier, nextBarrier, processAllStarts, reset, setReducingBiOperator, setSeedSupplier

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

addLabel, addStart, addStarts, clearLabels, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hashCode, 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.Generating

generateFinalResult

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

equals, getRequirements

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

JanusGraphMixedIndexAggStep

public JanusGraphMixedIndexAggStep(JanusGraphStep janusGraphStep,
                                   org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal,
                                   Aggregation agg)

Method Detail

projectTraverser

public Number projectTraverser(org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<S> traverser)

Specified by:

projectTraverser in class org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep<S,Number>

processNextStart

public org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<Number> processNextStart()

Overrides:

processNextStart in class org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep<S,Number>

toString

public String toString()

Overrides:

toString in class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<S,Number>

setMetrics

public void setMetrics(org.apache.tinkerpop.gremlin.process.traversal.util.MutableMetrics metrics)

Specified by:

setMetrics in interface org.apache.tinkerpop.gremlin.process.traversal.step.Profiling

getMixedIndexAggQuery

public MixedIndexAggQuery getMixedIndexAggQuery()