org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans
Class DotPOPrinter

java.lang.Object
  org.apache.pig.impl.plan.PlanDumper<E,P,S>
      org.apache.pig.impl.plan.DotPlanDumper<PhysicalOperator,PhysicalPlan,PhysicalOperator,PhysicalPlan>
          org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.DotPOPrinter

public class DotPOPrinter
extends DotPlanDumper<PhysicalOperator,PhysicalPlan,PhysicalOperator,PhysicalPlan>

This class can print a physical plan in the DOT format. It uses clusters to illustrate nesting. If "verbose" is off, it will skip any nesting.

Field Summary

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

mMultiInputSubgraphs, mMultiOutputSubgraphs, mSubgraphs

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

isVerbose, plan, ps

Constructor Summary

DotPOPrinter(PhysicalPlan plan, PrintStream ps)

DotPOPrinter(PhysicalPlan plan, PrintStream ps, boolean isSubGraph, Set<Operator> subgraphs, Set<Operator> multiInputSubgraphs, Set<Operator> multiOutputSubgraphs)

Method Summary

protected String[]	getAttributes(PhysicalOperator op) Used to generate the the attributes of a node
protected Collection<PhysicalPlan>	getMultiOutputNestedPlans(PhysicalOperator op) Used to determine if an operator has nested output plans
protected String	getName(PhysicalOperator op) Used to generate the label for an operator.
protected Collection<PhysicalPlan>	getNestedPlans(PhysicalOperator op) Used to determine if an operator has nested plans (without connections to in- or output operators.
protected DotPlanDumper	makeDumper(PhysicalPlan plan, PrintStream ps) makeDumper is a factory method.

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

dump, dumpEdge, dumpInvisibleOperators, dumpMultiInputNestedOperator, dumpMultiOutputNestedOperator, dumpNestedOperator, dumpOperator

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

getMultiInputNestedPlans, isVerbose, join, setVerbose

Methods inherited from class java.lang.Object

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

Constructor Detail

DotPOPrinter

public DotPOPrinter(PhysicalPlan plan,
                    PrintStream ps)

DotPOPrinter

public DotPOPrinter(PhysicalPlan plan,
                    PrintStream ps,
                    boolean isSubGraph,
                    Set<Operator> subgraphs,
                    Set<Operator> multiInputSubgraphs,
                    Set<Operator> multiOutputSubgraphs)

Method Detail

makeDumper

protected DotPlanDumper makeDumper(PhysicalPlan plan,
                                   PrintStream ps)

Description copied from class: PlanDumper

makeDumper is a factory method. Used by subclasses to specify what dumper should handle the nested plan.

Overrides:

makeDumper in class DotPlanDumper<PhysicalOperator,PhysicalPlan,PhysicalOperator,PhysicalPlan>

Parameters:

plan - Plan that the new dumper should handle

Returns:

the dumper for plan

getName

protected String getName(PhysicalOperator op)

Description copied from class: DotPlanDumper

Used to generate the label for an operator.

Overrides:

getName in class DotPlanDumper<PhysicalOperator,PhysicalPlan,PhysicalOperator,PhysicalPlan>

Parameters:

op - operator to dump

getAttributes

protected String[] getAttributes(PhysicalOperator op)

Description copied from class: DotPlanDumper

Used to generate the the attributes of a node

Overrides:

getAttributes in class DotPlanDumper<PhysicalOperator,PhysicalPlan,PhysicalOperator,PhysicalPlan>

Parameters:

op - operator

getMultiOutputNestedPlans

protected Collection<PhysicalPlan> getMultiOutputNestedPlans(PhysicalOperator op)

Description copied from class: PlanDumper

Used to determine if an operator has nested output plans

Overrides:

getMultiOutputNestedPlans in class PlanDumper<PhysicalOperator,PhysicalPlan,PhysicalPlan>

Parameters:

op - operator

Returns:

Map describing the input to nested plan relationship.

getNestedPlans

protected Collection<PhysicalPlan> getNestedPlans(PhysicalOperator op)

Description copied from class: PlanDumper

Used to determine if an operator has nested plans (without connections to in- or output operators.

Overrides:

getNestedPlans in class PlanDumper<PhysicalOperator,PhysicalPlan,PhysicalPlan>

Parameters:

op - operator

Returns:

Collection of nested plans.