Package org.umlg.sqlg.strategy

Class VertexStrategy

java.lang.Object

org.umlg.sqlg.strategy.BaseStrategy

org.umlg.sqlg.strategy.VertexStrategy

public class VertexStrategy
extends BaseStrategy

Author:

Pieter Martin Date: 2017/03/04

Field Summary

Fields inherited from class org.umlg.sqlg.strategy.BaseStrategy

EMIT_LABEL_SUFFIX, PATH_LABEL_SUFFIX, SQLG_PATH_FAKE_LABEL, SQLG_PATH_ORDER_RANGE_LABEL, SQLG_PATH_TEMP_FAKE_LABEL, SUPPORTED_ID_BI_PREDICATE, SUPPORTED_LABEL_BI_PREDICATE

Method Summary

Modifier and Type	Method	Description
void	apply()
protected SqlgStep	constructSqlgStep(org.apache.tinkerpop.gremlin.process.traversal.Step startStep)
protected boolean	doFirst(ListIterator<org.apache.tinkerpop.gremlin.process.traversal.Step<?,?>> stepIterator, org.apache.tinkerpop.gremlin.process.traversal.Step<?,?> step, org.apache.commons.lang3.mutable.MutableInt pathCount)	EdgeOtherVertexStep can not be optimized as the direction information is lost.
static VertexStrategy	from(org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal)
protected boolean	handleAggregateGlobalStep(ReplacedStep<?,?> replacedStep, org.apache.tinkerpop.gremlin.process.traversal.Step aggregateStep, String aggr)
protected boolean	isReplaceableStep(Class<? extends org.apache.tinkerpop.gremlin.process.traversal.Step> stepClass)
protected void	replaceStepInTraversal(org.apache.tinkerpop.gremlin.process.traversal.Step stepToReplace, SqlgStep sqlgStep)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

from

public static VertexStrategy from(org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin<?,?> traversal)

apply

public void apply()

doFirst

protected boolean doFirst(ListIterator<org.apache.tinkerpop.gremlin.process.traversal.Step<?,?>> stepIterator,
 org.apache.tinkerpop.gremlin.process.traversal.Step<?,?> step,
 org.apache.commons.lang3.mutable.MutableInt pathCount)

EdgeOtherVertexStep can not be optimized as the direction information is lost.

Specified by:

doFirst in class BaseStrategy

Parameters:

stepIterator - The steps to iterate. Unused for the VertexStrategy

step - The current step.

pathCount - The path count.

Returns:

true if the optimization can continue else false.

constructSqlgStep

protected SqlgStep constructSqlgStep(org.apache.tinkerpop.gremlin.process.traversal.Step startStep)

Specified by:

constructSqlgStep in class BaseStrategy

isReplaceableStep

protected boolean isReplaceableStep(Class<? extends org.apache.tinkerpop.gremlin.process.traversal.Step> stepClass)

Specified by:

isReplaceableStep in class BaseStrategy

replaceStepInTraversal

protected void replaceStepInTraversal(org.apache.tinkerpop.gremlin.process.traversal.Step stepToReplace,
 SqlgStep sqlgStep)

Specified by:

replaceStepInTraversal in class BaseStrategy

handleAggregateGlobalStep

protected boolean handleAggregateGlobalStep(ReplacedStep<?,?> replacedStep,
 org.apache.tinkerpop.gremlin.process.traversal.Step aggregateStep,
 String aggr)

Overrides:

handleAggregateGlobalStep in class BaseStrategy