org.modeshape.jcr.query.optimize
Class RaiseVariableName

java.lang.Object
  org.modeshape.jcr.query.optimize.RaiseVariableName

All Implemented Interfaces:

OptimizerRule

@Immutable
public class RaiseVariableName
extends Object
implements OptimizerRule

An optimizer rule that moves up higher in the plan any variable name property to the node immediately under a dependent query node.

Field Summary

static RaiseVariableName

INSTANCE

Constructor Summary

RaiseVariableName()

Method Summary

PlanNode	execute(QueryContext context, PlanNode plan, LinkedList<OptimizerRule> ruleStack) Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.
protected void	raiseVariableName(PlanNode node)
protected String	removeVariableName(PlanNode node)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final RaiseVariableName INSTANCE

Constructor Detail

RaiseVariableName

public RaiseVariableName()

Method Detail

execute

public PlanNode execute(QueryContext context,
                        PlanNode plan,
                        LinkedList<OptimizerRule> ruleStack)

Description copied from interface: OptimizerRule

Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.

Specified by:

execute in interface OptimizerRule

Parameters:

context - the context in which the query is being optimized; never null

plan - the plan to be optimized; never null

ruleStack - the stack of rules that will be run after this rule; never null

Returns:

the optimized plan; never null

raiseVariableName

protected void raiseVariableName(PlanNode node)

removeVariableName

protected String removeVariableName(PlanNode node)

toString

public String toString()

Overrides:

toString in class Object