org.janusgraph.graphdb.tinkerpop.optimize

Class JanusGraphMultiQueryStep

java.lang.Object

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

org.janusgraph.graphdb.tinkerpop.optimize.JanusGraphMultiQueryStep

All Implemented Interfaces:

Serializable, Cloneable, Iterator<org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>>, org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Vertex,org.apache.tinkerpop.gremlin.structure.Vertex>

public final class JanusGraphMultiQueryStep
extends org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<org.apache.tinkerpop.gremlin.structure.Vertex,org.apache.tinkerpop.gremlin.structure.Vertex>

This step can be injected before a traversal parent, such as a union, and will cache the starts sent to the parent. The traversal parent will drip feed those starts into its child traversal. If the initial step of that child supports multiQuery then its faster if initialised with all the starts than just one at a time, so this step allows it to request the full set of starts from this step when initialising itself.

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

Constructor Summary

Constructors

Constructor and Description
JanusGraphMultiQueryStep(org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Vertex,?> originalStep)

Method Summary

Modifier and Type	Method and Description
List<org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>>	getCachedStarts()
protected org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>	processNextStart()
void	reset()
String	toString()

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

addLabel, addStart, addStarts, clone, equals, getId, getLabels, getNextStep, getPreviousStep, getTraversal, hashCode, hasNext, next, 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

equals, getRequirements

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

JanusGraphMultiQueryStep

public JanusGraphMultiQueryStep(org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Vertex,?> originalStep)

Method Detail

processNextStart

protected org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex> processNextStart()
                                                                                                                                  throws NoSuchElementException

Specified by:

processNextStart in class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<org.apache.tinkerpop.gremlin.structure.Vertex,org.apache.tinkerpop.gremlin.structure.Vertex>

Throws:

NoSuchElementException

getCachedStarts

public List<org.apache.tinkerpop.gremlin.process.traversal.Traverser.Admin<org.apache.tinkerpop.gremlin.structure.Vertex>> getCachedStarts()

toString

public String toString()

Overrides:

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

reset

public void reset()

Specified by:

reset in interface org.apache.tinkerpop.gremlin.process.traversal.Step<org.apache.tinkerpop.gremlin.structure.Vertex,org.apache.tinkerpop.gremlin.structure.Vertex>

Overrides:

reset in class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<org.apache.tinkerpop.gremlin.structure.Vertex,org.apache.tinkerpop.gremlin.structure.Vertex>