org.apache.pig.newplan.logical
Class DotLOPrinter

java.lang.Object
  org.apache.pig.newplan.PlanDumper
      org.apache.pig.newplan.DotPlanDumper
          org.apache.pig.newplan.logical.DotLOPrinter

public class DotLOPrinter
extends DotPlanDumper

This class can print a logical 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.newplan.DotPlanDumper

mMultiInputSubgraphs, mMultiOutputSubgraphs, mSubgraphs

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

isVerbose, plan, ps

Constructor Summary

DotLOPrinter(BaseOperatorPlan plan, PrintStream ps)

Method Summary

protected String[]	getAttributes(Operator op) Used to generate the the attributes of a node
protected MultiMap<Operator,BaseOperatorPlan>	getMultiInputNestedPlans(Operator op) Used to determine if an operator has nested plans, which are connected to specific input operators.
protected String	getName(Operator op) Used to generate the label for an operator.
protected Collection<BaseOperatorPlan>	getNestedPlans(Operator op) Used to determine if an operator has nested plans (without connections to in- or output operators.
protected DotPlanDumper	makeDumper(BaseOperatorPlan plan, PrintStream ps) makeDumper is a factory method.
protected boolean	reverse(BaseOperatorPlan plan)

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

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

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

getMultiOutputNestedPlans, isVerbose, join, setVerbose

Methods inherited from class java.lang.Object

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

Constructor Detail

DotLOPrinter

public DotLOPrinter(BaseOperatorPlan plan,
                    PrintStream ps)

Method Detail

makeDumper

protected DotPlanDumper makeDumper(BaseOperatorPlan 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

Parameters:

plan - Plan that the new dumper should handle

Returns:

the dumper for plan

getName

protected String getName(Operator op)

Description copied from class: DotPlanDumper

Used to generate the label for an operator.

Overrides:

getName in class DotPlanDumper

Parameters:

op - operator to dump

getAttributes

protected String[] getAttributes(Operator op)

Description copied from class: DotPlanDumper

Used to generate the the attributes of a node

Overrides:

getAttributes in class DotPlanDumper

Parameters:

op - operator

getMultiInputNestedPlans

protected MultiMap<Operator,BaseOperatorPlan> getMultiInputNestedPlans(Operator op)

Description copied from class: PlanDumper

Used to determine if an operator has nested plans, which are connected to specific input operators.

Overrides:

getMultiInputNestedPlans in class PlanDumper

Parameters:

op - operator

Returns:

Map describing the input to nested plan relationship.

getNestedPlans

protected Collection<BaseOperatorPlan> getNestedPlans(Operator 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

Parameters:

op - operator

Returns:

Collection of nested plans.

reverse

protected boolean reverse(BaseOperatorPlan plan)

Overrides:

reverse in class DotPlanDumper