org.apache.pig.impl.logicalLayer
Class LogicalPlanCloneHelper

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

public class LogicalPlanCloneHelper
extends LOVisitor

LogicalPlanCloneHelper implements a visitor mechanism to clone a logical plan and then patch up the connections held within the operators of the logical plan. This class should not be used for cloning the logical plan. Use LogicalPlanCloner instead.

Field Summary

static Map<LogicalOperator,LogicalOperator>

mOpToCloneMap

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

mCurrentWalker, mPlan

Constructor Summary

LogicalPlanCloneHelper(LogicalPlan plan)

LogicalPlanCloneHelper(LogicalPlan plan, Map<LogicalOperator,LogicalOperator> origCloneMap)

Method Summary

LogicalPlan	getClonedPlan()
static void	resetState()
void	visit(BinaryExpressionOperator binOp)
void	visit(LOAdd op)
void	visit(LOAnd binOp)
protected void	visit(LOBinCond binCond)
protected void	visit(LOCast cast)
protected void	visit(LOCogroup cg)
protected void	visit(LOConst constant)
protected void	visit(LOCross cs)
protected void	visit(LODistinct dt)
void	visit(LODivide op)
void	visit(LOEqual op)
protected void	visit(LOFilter filter)
protected void	visit(LOForEach forEach)
protected void	visit(LOGenerate g)
protected void	visit(LogicalOperator op)
void	visit(LOGreaterThan op)
void	visit(LOGreaterThanEqual op)
void	visit(LOIsNull uniOp)
void	visit(LOLesserThan op)
void	visit(LOLesserThanEqual op)
protected void	visit(LOLimit limOp)
protected void	visit(LOLoad load)
void	visit(LOMapLookup op)
void	visit(LOMod op)
void	visit(LOMultiply op)
void	visit(LONegative op)
void	visit(LONot uniOp)
void	visit(LONotEqual op)
void	visit(LOOr binOp)
protected void	visit(LOProject project)
protected void	visit(LORegexp binOp)
protected void	visit(LOSort s)
protected void	visit(LOSplit split)
protected void	visit(LOSplitOutput sop)
protected void	visit(LOStore store)
protected void	visit(LOStream stream)
void	visit(LOSubtract op)
protected void	visit(LOUnion u)
protected void	visit(LOUserFunc func) Iterate over each expression that is part of the function argument list
protected void	visit(UnaryExpressionOperator uniOp)

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

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

Field Detail

mOpToCloneMap

public static Map<LogicalOperator,LogicalOperator> mOpToCloneMap

Constructor Detail

LogicalPlanCloneHelper

public LogicalPlanCloneHelper(LogicalPlan plan)
                       throws CloneNotSupportedException

Parameters:

plan - logical plan to be cloned

Throws:

CloneNotSupportedException

LogicalPlanCloneHelper

public LogicalPlanCloneHelper(LogicalPlan plan,
                              Map<LogicalOperator,LogicalOperator> origCloneMap)
                       throws CloneNotSupportedException

Parameters:

plan -

origCloneMap - the lookup table used for tracking operators cloned in the plan

Throws:

CloneNotSupportedException

Method Detail

getClonedPlan

public LogicalPlan getClonedPlan()
                          throws CloneNotSupportedException

Throws:

CloneNotSupportedException

resetState

public static void resetState()

visit

public void visit(BinaryExpressionOperator binOp)

Overrides:

visit in class LOVisitor

Parameters:

binOp - the logical binary expression operator that has to be visited

visit

public void visit(LOAdd op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOAdd)

visit

public void visit(LOAnd binOp)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOAnd)

visit

protected void visit(LOBinCond binCond)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

binCond - the logical binCond operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOBinCond)

visit

protected void visit(LOCast cast)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

cast - the logical cast operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOCast)

visit

protected void visit(LOCogroup cg)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

cg - the logical cogroup operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOCogroup)

visit

protected void visit(LOConst constant)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOConst)

visit

protected void visit(LOCross cs)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOCross)

visit

protected void visit(LODistinct dt)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LODistinct)

visit

public void visit(LODivide op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LODivide)

visit

public void visit(LOEqual op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOEqual)

visit

protected void visit(LOFilter filter)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

filter - the logical filter operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOFilter)

visit

protected void visit(LOForEach forEach)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

forEach - the logical foreach operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOForEach)

visit

protected void visit(LOGenerate g)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

g - the logical generate operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOGenerate)

visit

protected void visit(LogicalOperator op)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

op - the logical operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LogicalOperator)

visit

public void visit(LOGreaterThan op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOGreaterThan)

visit

public void visit(LOGreaterThanEqual op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOGreaterThanEqual)

visit

public void visit(LOIsNull uniOp)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOIsNull)

visit

public void visit(LOLesserThan op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOLesserThan)

visit

public void visit(LOLesserThanEqual op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOLesserThanEqual)

visit

protected void visit(LOLimit limOp)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOLimit)

visit

protected void visit(LOLoad load)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOLoad)

visit

public void visit(LOMapLookup op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOMapLookup)

visit

public void visit(LOMod op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOMod)

visit

public void visit(LOMultiply op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOMultiply)

visit

public void visit(LONegative op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LONegative)

visit

public void visit(LONot uniOp)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LONot)

visit

public void visit(LONotEqual op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LONotEqual)

visit

public void visit(LOOr binOp)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOOr)

visit

protected void visit(LOProject project)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOProject)

visit

protected void visit(LORegexp binOp)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

binOp - the logical regexp operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LORegexp)

visit

protected void visit(LOSort s)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

s - the logical sort operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOSort)

visit

protected void visit(LOSplit split)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

split - the logical split operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOSplit)

visit

protected void visit(LOSplitOutput sop)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOSplitOutput)

visit

protected void visit(LOStore store)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOStore)

visit

protected void visit(LOStream stream)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOStream)

visit

public void visit(LOSubtract op)
           throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOSubtract)

visit

protected void visit(LOUnion u)
              throws VisitorException

Overrides:

visit in class LOVisitor

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOUnion)

visit

protected void visit(LOUserFunc func)
              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:

func - the user defined function

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.LOUserFunc)

visit

protected void visit(UnaryExpressionOperator uniOp)
              throws VisitorException

Overrides:

visit in class LOVisitor

Parameters:

uniOp - the logical unary operator that has to be visited

Throws:

VisitorException

See Also:

LOVisitor.visit(org.apache.pig.impl.logicalLayer.UnaryExpressionOperator)