org.modeshape.jcr.query.optimize
Class RewritePseudoColumns

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

All Implemented Interfaces:

OptimizerRule

@Immutable
public class RewritePseudoColumns
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 RewritePseudoColumns

INSTANCE

Constructor Summary

RewritePseudoColumns()

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 Constraint	rewrite(QueryContext context, Constraint constraint)
protected DynamicOperand	rewrite(QueryContext context, DynamicOperand operand)
protected JoinCondition	rewrite(QueryContext context, JoinCondition condition)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final RewritePseudoColumns INSTANCE

Constructor Detail

RewritePseudoColumns

public RewritePseudoColumns()

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

rewrite

protected JoinCondition rewrite(QueryContext context,
                                JoinCondition condition)

rewrite

protected Constraint rewrite(QueryContext context,
                             Constraint constraint)

rewrite

protected DynamicOperand rewrite(QueryContext context,
                                 DynamicOperand operand)