org.apache.hadoop.examples.pi

Class TaskResult

java.lang.Object

org.apache.hadoop.examples.pi.TaskResult

All Implemented Interfaces:

Comparable<TaskResult>, Combinable<TaskResult>, Container<Summation>, Writable

public class TaskResult
extends Object
implements Container<Summation>, Combinable<TaskResult>, Writable

A class for map task results or reduce task results.

Constructor Summary

Constructors

Constructor and Description
TaskResult()

Method Summary

Methods

Modifier and Type	Method and Description
TaskResult	combine(TaskResult that) Combine this with that.
int	compareTo(TaskResult that)
boolean	equals(Object obj)
Summation	getElement()
int	hashCode() Not supported
void	readFields(DataInput in) Deserialize the fields of this object from in.
String	toString()
static TaskResult	valueOf(String s) Covert a String to a TaskResult
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskResult

public TaskResult()

Method Detail

getElement

public Summation getElement()

Specified by:

getElement in interface Container<Summation>

Returns:

The contained element.

compareTo

public int compareTo(TaskResult that)

Specified by:

compareTo in interface Comparable<TaskResult>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Not supported

Overrides:

hashCode in class Object

combine

public TaskResult combine(TaskResult that)

Combine this with that.

Specified by:

combine in interface Combinable<TaskResult>

Parameters:

that - Another object.

Returns:

The combined object.

readFields

public void readFields(DataInput in)
                throws IOException

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object

valueOf

public static TaskResult valueOf(String s)

Covert a String to a TaskResult