org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.plans

Class DotMRPrinter.InnerOperator

java.lang.Object

org.apache.pig.impl.plan.Operator<PlanVisitor>

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.plans.DotMRPrinter.InnerOperator

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Operator>

Enclosing class:

DotMRPrinter

public static class DotMRPrinter.InnerOperator
extends Operator<PlanVisitor>

Helper class to represent the relationship of map, reduce and combine phases in an MR operator.

See Also:

Serialized Form

Field Summary

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

mKey

Constructor Summary

Constructors

Constructor and Description
InnerOperator(PhysicalPlan plan, String name)

Method Summary

Modifier and Type	Method and Description
PhysicalPlan	getPlan()
int	hashCode() Needed to ensure that the list iterators' outputs are deterministic.
String	name()
boolean	supportsMultipleInputs() Indicates whether this operator supports multiple inputs.
boolean	supportsMultipleOutputs() Indicates whether this operator supports multiple outputs.
void	visit(PlanVisitor v) Visit this node with the provided visitor.

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

clone, compareTo, equals, getOperatorKey, getProjectionMap, regenerateProjectionMap, rewire, toString, unsetProjectionMap

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

InnerOperator

public InnerOperator(PhysicalPlan plan,
                     String name)

Method Detail

visit

public void visit(PlanVisitor v)

Description copied from class: Operator

Visit this node with the provided visitor. This should only be called by the visitor class itself, never directly.

Specified by:

visit in class Operator<PlanVisitor>

Parameters:

v - Visitor to visit with.

supportsMultipleInputs

public boolean supportsMultipleInputs()

Description copied from class: Operator

Indicates whether this operator supports multiple inputs.

Specified by:

supportsMultipleInputs in class Operator<PlanVisitor>

Returns:

true if it does, otherwise false.

supportsMultipleOutputs

public boolean supportsMultipleOutputs()

Description copied from class: Operator

Indicates whether this operator supports multiple outputs.

Specified by:

supportsMultipleOutputs in class Operator<PlanVisitor>

Returns:

true if it does, otherwise false.

name

public String name()

Specified by:

name in class Operator<PlanVisitor>

getPlan

public PhysicalPlan getPlan()

hashCode

public int hashCode()

Description copied from class: Operator

Needed to ensure that the list iterators' outputs are deterministic. Without this we are totally at object id's mercy.

Overrides:

hashCode in class Operator<PlanVisitor>