Package org.apache.hadoop.io

Class BinaryComparable

java.lang.Object

org.apache.hadoop.io.BinaryComparable

All Implemented Interfaces:

java.lang.Comparable<BinaryComparable>

Direct Known Subclasses:

BytesWritable, Text

@Public
@Stable
public abstract class BinaryComparable
extends java.lang.Object
implements java.lang.Comparable<BinaryComparable>

Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.

Constructor Summary

Constructors

Constructor	Description
BinaryComparable()

Method Summary

Modifier and Type	Method	Description
int	compareTo(byte[] other, int off, int len)	Compare bytes from {#getBytes()} to those provided.
int	compareTo(BinaryComparable other)	Compare bytes from {#getBytes()}.
boolean	equals(java.lang.Object other)	Return true if bytes from {#getBytes()} match.
abstract byte[]	getBytes()	Return representative byte array for this instance.
abstract int	getLength()	Return n st bytes 0..n-1 from {#getBytes()} are valid.
int	hashCode()	Return a hash of the bytes returned from {#getBytes()}.

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryComparable

public BinaryComparable()

Method Detail

getLength

public abstract int getLength()

Return n st bytes 0..n-1 from {#getBytes()} are valid.

Returns:

length.

getBytes

public abstract byte[] getBytes()

Return representative byte array for this instance.

Returns:

getBytes.

compareTo

public int compareTo(BinaryComparable other)

Compare bytes from {#getBytes()}.

Specified by:

compareTo in interface java.lang.Comparable<BinaryComparable>

See Also:

WritableComparator.compareBytes(byte[],int,int,byte[],int,int)

compareTo

public int compareTo(byte[] other,
                     int off,
                     int len)

Compare bytes from {#getBytes()} to those provided.

Parameters:

other - other.

off - off.

len - len.

Returns:

compareBytes.

equals

public boolean equals(java.lang.Object other)

Return true if bytes from {#getBytes()} match.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Return a hash of the bytes returned from {#getBytes()}.

Overrides:

hashCode in class java.lang.Object

See Also:

WritableComparator.hashBytes(byte[],int)