Package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.rewriting.rules

Class AbstractRuleApplicationImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.rewriting.rules.AbstractRuleApplicationImpl

All Implemented Interfaces:

RandomizedSelection.WeightedObject, RuleApplication

public abstract class AbstractRuleApplicationImpl
extends Object
implements RuleApplication

Field Summary

Fields

Modifier and Type	Field	Description
protected final PhysicalPlan[]	pathToTargetSubPlan
protected final RewritingRule	rule

Constructor Summary

Constructors

Constructor	Description
AbstractRuleApplicationImpl(PhysicalPlan[] pathToTargetSubPlan, RewritingRule rule)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
protected PhysicalPlan[]	getNewChildPlans(PhysicalPlan parent, PhysicalPlan rewrittenChildBefore, PhysicalPlan rewrittenChildAfter)
PhysicalPlan	getPlan()	Returns the (complete) original plan to which the rule is meant to be applied.
PhysicalPlan	getResultingPlan()	Returns the complete rewritten plan.
RewritingRule	getRule()	Returns the actual rewriting rule to be applied.
double	getWeight()
protected PhysicalPlan	reconstructParentPlan(PhysicalPlan parent, PhysicalPlan rewrittenChildBefore, PhysicalPlan rewrittenChildAfter)
protected abstract PhysicalPlan	rewritePlan(PhysicalPlan plan)

Methods inherited from class java.lang.Object

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

Field Details

pathToTargetSubPlan

protected final PhysicalPlan[] pathToTargetSubPlan

rule

protected final RewritingRule rule

Constructor Details

AbstractRuleApplicationImpl

public AbstractRuleApplicationImpl(PhysicalPlan[] pathToTargetSubPlan,
 RewritingRule rule)

Method Details

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getPlan

public PhysicalPlan getPlan()

Description copied from interface: RuleApplication

Returns the (complete) original plan to which the rule is meant to be applied. Note that this is really the whole original plan, not just the specific subplan that is meant to be modified by the rule application.

Specified by:

getPlan in interface RuleApplication

getRule

public RewritingRule getRule()

Description copied from interface: RuleApplication

Returns the actual rewriting rule to be applied.@return

Specified by:

getRule in interface RuleApplication

getWeight

public double getWeight()

Specified by:

getWeight in interface RandomizedSelection.WeightedObject

getResultingPlan

public PhysicalPlan getResultingPlan()

Description copied from interface: RuleApplication

Returns the complete rewritten plan.

Specified by:

getResultingPlan in interface RuleApplication

reconstructParentPlan

protected PhysicalPlan reconstructParentPlan(PhysicalPlan parent,
 PhysicalPlan rewrittenChildBefore,
 PhysicalPlan rewrittenChildAfter)

getNewChildPlans

protected PhysicalPlan[] getNewChildPlans(PhysicalPlan parent,
 PhysicalPlan rewrittenChildBefore,
 PhysicalPlan rewrittenChildAfter)

rewritePlan

protected abstract PhysicalPlan rewritePlan(PhysicalPlan plan)