org.apache.pig.newplan.logical.optimizer
Class LogicalPlanPrinter

java.lang.Object
  org.apache.pig.newplan.PlanVisitor
      org.apache.pig.newplan.logical.optimizer.LogicalPlanPrinter

public class LogicalPlanPrinter
extends PlanVisitor

A visitor mechanism printing out the logical plan.

Field Summary

static String

SEPERATE

Fields inherited from class org.apache.pig.newplan.PlanVisitor

currentWalker, DEFAULT_SCOPE, plan

Constructor Summary

LogicalPlanPrinter(OperatorPlan plan, PrintStream ps)

Method Summary

protected String	depthFirstLP()
protected String	reverseDepthFirstLP()
void	visit() Entry point for visiting the plan.

Methods inherited from class org.apache.pig.newplan.PlanVisitor

getPlan, popWalker, pushWalker

Methods inherited from class java.lang.Object

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

Field Detail

SEPERATE

public static String SEPERATE

Constructor Detail

LogicalPlanPrinter

public LogicalPlanPrinter(OperatorPlan plan,
                          PrintStream ps)
                   throws FrontendException

Parameters:

ps - PrintStream to output plan information to

plan - Logical plan to print

Throws:

FrontendException

Method Detail

visit

public void visit()
           throws FrontendException

Description copied from class: PlanVisitor

Entry point for visiting the plan.

Overrides:

visit in class PlanVisitor

Throws:

FrontendException

depthFirstLP

protected String depthFirstLP()
                       throws FrontendException,
                              IOException

Throws:

FrontendException

IOException

reverseDepthFirstLP

protected String reverseDepthFirstLP()
                              throws FrontendException,
                                     IOException

Throws:

FrontendException

IOException