vishnu.model.algebra.optimizer
Class ChildVisitorTranslationStage

java.lang.Object
  vishnu.model.algebra.optimizer.AbstractTranslationStage
      vishnu.model.algebra.optimizer.ChildVisitorTranslationStage

All Implemented Interfaces:

TranslationStage, VisitorTranslationStage

Direct Known Subclasses:

AlgorithmSelectionStage, ConjunctionTranslationStage, JoinTranslationStage, NormalizationStage, ProjectionForwardingTranslationStage, SelectionForwardingTranslationStage

public abstract class ChildVisitorTranslationStage
extends AbstractTranslationStage
implements VisitorTranslationStage

Author:

Hernan Rancati

Constructor Summary

ChildVisitorTranslationStage()

Method Summary

Relation	perform(Relation r, UserContext c) Contract: subclasses should return super.perform(result)
abstract Relation	visit(Relation r, UserContext c)

Methods inherited from class vishnu.model.algebra.optimizer.AbstractTranslationStage

attach

Methods inherited from class java.lang.Object

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

Constructor Detail

ChildVisitorTranslationStage

public ChildVisitorTranslationStage()

Method Detail

perform

public Relation perform(Relation r,
                        UserContext c)

Description copied from class: AbstractTranslationStage

Contract: subclasses should return super.perform(result)

Specified by:

perform in interface TranslationStage

Overrides:

perform in class AbstractTranslationStage

visit

public abstract Relation visit(Relation r,
                               UserContext c)

Specified by:

visit in interface VisitorTranslationStage