org.apache.tinkerpop.gremlin.process.computer

Class MapReduce.NullObject

java.lang.Object

org.apache.tinkerpop.gremlin.process.computer.MapReduce.NullObject

All Implemented Interfaces:

Serializable, Comparable

Enclosing interface:

MapReduce<MK,MV,RK,RV,R>

public static class MapReduce.NullObject
extends Object
implements Comparable, Serializable

A convenience singleton when a single key is needed so that all emitted values converge to the same combiner/reducer.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NullObject()

Method Summary

Modifier and Type	Method and Description
int	compareTo(Object object)
boolean	equals(Object object)
int	hashCode()
static MapReduce.NullObject	instance()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

NullObject

public NullObject()

Method Detail

instance

public static MapReduce.NullObject instance()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

compareTo

public int compareTo(Object object)

Specified by:

compareTo in interface Comparable

toString

public String toString()

Overrides:

toString in class Object