org.apache.pig.newplan.logical.optimizer

Class ProjectionPatcher

java.lang.Object

org.apache.pig.newplan.logical.optimizer.ProjectionPatcher

All Implemented Interfaces:

PlanTransformListener

public class ProjectionPatcher
extends java.lang.Object
implements PlanTransformListener

A PlanTransformListener that will patch up references in projections.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ProjectionPatcher.ProjectionFinder

Constructor Summary

Constructors

Constructor and Description
ProjectionPatcher()

Method Summary

Modifier and Type	Method and Description
void	transformed(OperatorPlan fp, OperatorPlan tp) Notification that a plan has been transformed.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectionPatcher

public ProjectionPatcher()

Method Detail

transformed

public void transformed(OperatorPlan fp,
                        OperatorPlan tp)
                 throws FrontendException

Description copied from interface: PlanTransformListener

Notification that a plan has been transformed. The listener is free in this method to make changes to the annotations on the plan now that it has been transformed.

Specified by:

transformed in interface PlanTransformListener

Parameters:

fp - the full plan that has been transformed

tp - a plan containing only the operators that have been transformed

Throws:

FrontendException