org.apache.hadoop.examples.pi

Class SummationWritable

java.lang.Object

org.apache.hadoop.examples.pi.SummationWritable

All Implemented Interfaces:

Comparable<SummationWritable>, Container<Summation>, Writable, WritableComparable<SummationWritable>

public final class SummationWritable
extends Object
implements WritableComparable<SummationWritable>, Container<Summation>

A Writable class for Summation

Constructor Summary

Constructors

Constructor and Description
SummationWritable()

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(SummationWritable that)
boolean	equals(Object obj)
Summation	getElement()
int	hashCode() Not supported
static Summation	read(Class<?> clazz, Configuration conf) Read sigma from conf
void	readFields(DataInput in) Deserialize the fields of this object from in.
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.
static void	write(Summation sigma, Class<?> clazz, Configuration conf) Write sigma to conf
static void	write(Summation sigma, DataOutput out) Write sigma to DataOutput

Methods inherited from class java.lang.Object

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

Constructor Detail

SummationWritable

public SummationWritable()

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getElement

public Summation getElement()

Specified by:

getElement in interface Container<Summation>

Returns:

The contained element.

read

public static Summation read(Class<?> clazz,
             Configuration conf)

Read sigma from conf

write

public static void write(Summation sigma,
         Class<?> clazz,
         Configuration conf)

Write sigma to conf

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 static void write(Summation sigma,
         DataOutput out)
                  throws IOException

Write sigma to DataOutput

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

compareTo

public int compareTo(SummationWritable that)

Specified by:

compareTo in interface Comparable<SummationWritable>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Not supported

Overrides:

hashCode in class Object