com.asakusafw.runtime.io.util

Class InvertOrder

java.lang.Object

com.asakusafw.runtime.io.util.InvertOrder

All Implemented Interfaces:

WritableRawComparable, Comparable<WritableRawComparable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<WritableRawComparable>

public class InvertOrder
extends Object
implements WritableRawComparable

A wrapper for invert ordering of WritableRawComparable.

Since:

0.2.5

Constructor Summary

Constructors

Constructor and Description
InvertOrder(WritableRawComparable entity) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
int	compareInBytes(byte[] b1, int o1, byte[] b2, int o2) Compares two objects in bytes.
int	compareTo(WritableRawComparable o)
boolean	equals(Object obj)
WritableRawComparable	getEntity() Returns the entity object.
int	getSizeInBytes(byte[] buf, int offset) Computes and returns size in bytes.
int	hashCode()
void	readFields(DataInput in)
String	toString()
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

InvertOrder

public InvertOrder(WritableRawComparable entity)

Creates a new instance.

Parameters:

entity - entity object

Throws:

IllegalArgumentException - if some parameters were null

Method Detail

getEntity

public WritableRawComparable getEntity()

Returns the entity object.

Returns:

the entity

getSizeInBytes

public int getSizeInBytes(byte[] buf,
                          int offset)
                   throws IOException

Description copied from interface: WritableRawComparable

Computes and returns size in bytes.

Specified by:

getSizeInBytes in interface WritableRawComparable

Parameters:

buf - bytes array

offset - bytes offset

Returns:

size in bytes

Throws:

IOException - if failed to compute size

compareInBytes

public int compareInBytes(byte[] b1,
                          int o1,
                          byte[] b2,
                          int o2)
                   throws IOException

Description copied from interface: WritableRawComparable

Compares two objects in bytes.

Specified by:

compareInBytes in interface WritableRawComparable

Parameters:

b1 - bytes representation of the first object

o1 - offset of the first object

b2 - bytes representation of the second object

o2 - offset of the second object

Returns:

the comparison result

Throws:

IOException - if failed to comparison

write

public void write(DataOutput out)
           throws IOException

Specified by:

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

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

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

Throws:

IOException

compareTo

public int compareTo(WritableRawComparable o)

Specified by:

compareTo in interface Comparable<WritableRawComparable>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object