com.mapr.db.mapreduce.impl

Class ByteBufWritableComparable

java.lang.Object

com.mapr.db.mapreduce.impl.ByteBufWritableComparable

All Implemented Interfaces:

java.lang.Comparable<ByteBufWritableComparable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<ByteBufWritableComparable>

public class ByteBufWritableComparable
extends java.lang.Object
implements org.apache.hadoop.io.WritableComparable<ByteBufWritableComparable>

A byte sequence that can be used as a key in JSON DB table. It implements WritableComparable interface. When a new instance is created, underlying byte buffer is only referenced.

Field Summary

Fields

Modifier and Type	Field and Description
static ByteBufWritableComparable	EMPTY_BYTEBUFFER

Constructor Summary

Constructors

Constructor and Description
ByteBufWritableComparable()
ByteBufWritableComparable(java.nio.ByteBuffer buff)

Method Summary

Modifier and Type	Method and Description
int	compareTo(ByteBufWritableComparable o) compares current object with another object of type ByteBufWritableComparable.
boolean	equals(java.lang.Object b) Compares current object with b.
java.nio.ByteBuffer	getByteBuf()
byte[]	getBytes()
int	getLength()
void	readFields(java.io.DataInput in) Deserialize the fields of this object from input stream in.
void	setByteBuf(java.nio.ByteBuffer b)
java.lang.String	toString() Returns the string version of current object.
void	write(java.io.DataOutput out) Write serialized object to output stream out.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BYTEBUFFER

public static ByteBufWritableComparable EMPTY_BYTEBUFFER

Constructor Detail

ByteBufWritableComparable

public ByteBufWritableComparable()

ByteBufWritableComparable

public ByteBufWritableComparable(java.nio.ByteBuffer buff)

Method Detail

getLength

public int getLength()

getBytes

public byte[] getBytes()

getByteBuf

public java.nio.ByteBuffer getByteBuf()

setByteBuf

public void setByteBuf(java.nio.ByteBuffer b)

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Deserialize the fields of this object from input stream in.

Specified by:

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

Parameters:

in - Input stream which contains serialized object.

Throws:

java.io.IOException

See Also:

Writable.readFields(java.io.DataInput)

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Write serialized object to output stream out.

Specified by:

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

Parameters:

out - Outputstream where serialized object is to be written.

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object b)

Compares current object with b.

Overrides:

equals in class java.lang.Object

Parameters:

b - Object to be compared with.

Returns:

true/false

See Also:

Object.equals(java.lang.Object)

compareTo

public int compareTo(ByteBufWritableComparable o)

compares current object with another object of type ByteBufWritableComparable.

Specified by:

compareTo in interface java.lang.Comparable<ByteBufWritableComparable>

Parameters:

o - the object to be compared with current object.

Returns:

a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

toString

public java.lang.String toString()

Returns the string version of current object.

Overrides:

toString in class java.lang.Object

Returns:

string representation of current object.