org.janusgraph.graphdb.tinkerpop.optimize.strategy

Class JanusGraphMixedIndexCountStrategy

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>

org.janusgraph.graphdb.tinkerpop.optimize.strategy.JanusGraphMixedIndexCountStrategy

All Implemented Interfaces:

Serializable, Comparable<Class<? extends org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy>>, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy<org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy

public class JanusGraphMixedIndexCountStrategy
extends org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>

If the query can be satisfied by a single mixed index query, and the query is followed by a count step, then this strategy replaces original step with JanusGraphMixedIndexAggStep, which fires a count aggregation query against mixed index backend without retrieving all elements

Author:

Boxuan Li (liboxuan@connect.hku.hk)

See Also:

Serialized Form

Nested Class Summary

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

org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.DecorationStrategy, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.FinalizationStrategy, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.OptimizationStrategy, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy, org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.VerificationStrategy

Field Summary

Fields inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

STRATEGY

Method Summary

Modifier and Type	Method and Description
void	apply(org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal)
Set<Class<? extends org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>>	applyPost()
Set<Class<? extends org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>>	applyPrior()
protected Aggregation	getAggregation(org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep originalGraphStep)
static JanusGraphMixedIndexCountStrategy	instance()
protected boolean	isEligibleToSkip(org.apache.tinkerpop.gremlin.process.traversal.Step currentStep)

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy

compareTo, getTraversalCategory

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

getConfiguration

Method Detail

getAggregation

protected Aggregation getAggregation(org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep originalGraphStep)

instance

public static JanusGraphMixedIndexCountStrategy instance()

applyPrior

public Set<Class<? extends org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>> applyPrior()

apply

public void apply(org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal)

Specified by:

apply in interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy<org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>

applyPost

public Set<Class<? extends org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>> applyPost()

Specified by:

applyPost in interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy<org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.ProviderOptimizationStrategy>

isEligibleToSkip

protected boolean isEligibleToSkip(org.apache.tinkerpop.gremlin.process.traversal.Step currentStep)