com.asakusafw.runtime.io.util

Class NullWritableRawComparable

java.lang.Object

com.asakusafw.runtime.io.util.NullWritableRawComparable

All Implemented Interfaces:

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

public final class NullWritableRawComparable
extends Object
implements WritableRawComparable

An implementation of WritableRawComparable represents null.

Since:

0.4.0

Field Summary

Fields

Modifier and Type	Field and Description
static NullWritableRawComparable	INSTANCE An invariant instance.

Constructor Summary

Constructors

Constructor and Description
NullWritableRawComparable()

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)
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

Field Detail

INSTANCE

public static final NullWritableRawComparable INSTANCE

An invariant instance.

Constructor Detail

NullWritableRawComparable

public NullWritableRawComparable()

Method Detail

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>

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

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