org.apache.pig.impl.logicalLayer
Class UDFFinder

java.lang.Object
  org.apache.pig.impl.plan.PlanVisitor<LogicalOperator,LogicalPlan>
      org.apache.pig.impl.logicalLayer.LOVisitor
          org.apache.pig.impl.logicalLayer.UDFFinder

public class UDFFinder
extends LOVisitor

A visitor to track the UDFs in a plan.

Field Summary

Fields inherited from class org.apache.pig.impl.plan.PlanVisitor

mCurrentWalker, mPlan

Constructor Summary

UDFFinder(LogicalPlan plan)

Method Summary

boolean	foundAnyUDF()
List<FuncSpec>	getUDFList()
Set<FuncSpec>	getUDFSet()
protected void	visit(LOUserFunc udf) Iterate over each expression that is part of the function argument list

Methods inherited from class org.apache.pig.impl.logicalLayer.LOVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class org.apache.pig.impl.plan.PlanVisitor

getPlan, popWalker, pushWalker, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

UDFFinder

public UDFFinder(LogicalPlan plan)

Parameters:

plan - logical plan to query the presence of UDFs

Method Detail

visit

protected void visit(LOUserFunc udf)
              throws VisitorException

Description copied from class: LOVisitor

Iterate over each expression that is part of the function argument list

Overrides:

visit in class LOVisitor

Parameters:

udf - the user defined function

Throws:

VisitorException

getUDFList

public List<FuncSpec> getUDFList()

Returns:

list of function specifications found in the plan

getUDFSet

public Set<FuncSpec> getUDFSet()

Returns:

set of function specifications found in the plan

foundAnyUDF

public boolean foundAnyUDF()

Returns:

true if the plan had any UDFs; false otherwise