org.apache.mahout.common

Class IntPairWritable

java.lang.Object

org.apache.hadoop.io.BinaryComparable

org.apache.mahout.common.IntPairWritable

All Implemented Interfaces:

Cloneable, Comparable<org.apache.hadoop.io.BinaryComparable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<org.apache.hadoop.io.BinaryComparable>

public final class IntPairWritable
extends org.apache.hadoop.io.BinaryComparable
implements org.apache.hadoop.io.WritableComparable<org.apache.hadoop.io.BinaryComparable>, Cloneable

A WritableComparable which encapsulates an ordered pair of signed integers.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IntPairWritable.Comparator
static class	IntPairWritable.FirstGroupingComparator Compare only the first part of the pair, so that reduce is called once for each value of the first part.
static class	IntPairWritable.Frequency A wrapper class that associates pairs with frequency (Occurrences)

Constructor Summary

Constructors

Constructor and Description
IntPairWritable()
IntPairWritable(int x, int y)
IntPairWritable(IntPairWritable pair)

Method Summary

Modifier and Type	Method and Description
Object	clone()
int	compareTo(org.apache.hadoop.io.BinaryComparable other)
boolean	equals(Object obj)
byte[]	getBytes()
int	getFirst()
int	getLength()
int	getSecond()
int	hashCode()
void	readFields(DataInput in)
void	set(int x, int y)
void	setFirst(int x)
void	setSecond(int y)
String	toString()
void	write(DataOutput out)

Methods inherited from class org.apache.hadoop.io.BinaryComparable

compareTo

Methods inherited from class java.lang.Object

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

Constructor Detail

IntPairWritable

public IntPairWritable()

IntPairWritable

public IntPairWritable(IntPairWritable pair)

IntPairWritable

public IntPairWritable(int x,
                       int y)

Method Detail

set

public void set(int x,
                int y)

setFirst

public void setFirst(int x)

getFirst

public int getFirst()

setSecond

public void setSecond(int y)

getSecond

public int getSecond()

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

hashCode

public int hashCode()

Overrides:

hashCode in class org.apache.hadoop.io.BinaryComparable

equals

public boolean equals(Object obj)

Overrides:

equals in class org.apache.hadoop.io.BinaryComparable

compareTo

public int compareTo(org.apache.hadoop.io.BinaryComparable other)

Specified by:

compareTo in interface Comparable<org.apache.hadoop.io.BinaryComparable>

Overrides:

compareTo in class org.apache.hadoop.io.BinaryComparable

clone

public Object clone()

Overrides:

clone in class Object

toString

public String toString()

Overrides:

toString in class Object

getBytes

public byte[] getBytes()

Specified by:

getBytes in class org.apache.hadoop.io.BinaryComparable

getLength

public int getLength()

Specified by:

getLength in class org.apache.hadoop.io.BinaryComparable