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

Class PatternNode

java.lang.Object

org.apache.pig.newplan.Operator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PatternNode

public class PatternNode
extends Operator

Used for finding/representing a pattern in the plan This class represents a node in the pattern

Field Summary

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

annotations, hashPrime, location, name, plan

Constructor Summary

Constructors

Constructor and Description
PatternNode(OperatorPlan p)

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(PlanVisitor v) Accept a visitor at this node in the graph.
Class<?>	getClassName()
Object	getMatch()
boolean	isEqual(Operator operator) This is like a shallow equals comparison.
boolean	isLeafNode()
boolean	isSourceNode()
void	setClassName(Class<?> className)
void	setLeafNode(boolean isLeafNode) Set isLeafNode to true if the node must be a source
void	setMatch(Object match)
void	setSourceNode(boolean isSourceNode) Set isSourceNode to true if the node must be a source
String	toString()

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

annotate, getAnnotation, getLocation, getName, getPlan, removeAnnotation, setLocation, setPlan

Methods inherited from class java.lang.Object

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

Constructor Detail

PatternNode

public PatternNode(OperatorPlan p)

Method Detail

isLeafNode

public boolean isLeafNode()

Returns:

the isLeafNode

setLeafNode

public void setLeafNode(boolean isLeafNode)

Set isLeafNode to true if the node must be a source

Parameters:

isLeafNode -

isSourceNode

public boolean isSourceNode()

Returns:

the isSourceNode

setSourceNode

public void setSourceNode(boolean isSourceNode)

Set isSourceNode to true if the node must be a source

Parameters:

isSourceNode -

getClassName

public Class<?> getClassName()

Returns:

the className

setClassName

public void setClassName(Class<?> className)

Parameters:

className - the className to set

getMatch

public Object getMatch()

Returns:

the match

setMatch

public void setMatch(Object match)

Parameters:

match - the match to set

accept

public void accept(PlanVisitor v)
            throws FrontendException

Description copied from class: Operator

Accept a visitor at this node in the graph.

Specified by:

accept in class Operator

Parameters:

v - Visitor to accept.

Throws:

FrontendException

isEqual

public boolean isEqual(Operator operator)
                throws FrontendException

Description copied from class: Operator

This is like a shallow equals comparison. It returns true if two operators have equivalent properties even if they are different objects. Here properties mean equivalent plan and equivalent name.

Specified by:

isEqual in class Operator

Returns:

true if two object have equivalent properties, else false

Throws:

FrontendException

toString

public String toString()

Overrides:

toString in class Object