org.apache.accumulo.core.client.lexicoder

Class ReverseLexicoder<T>

java.lang.Object

org.apache.accumulo.core.client.lexicoder.AbstractEncoder<T>

org.apache.accumulo.core.client.lexicoder.impl.AbstractLexicoder<T>

org.apache.accumulo.core.client.lexicoder.ReverseLexicoder<T>

All Implemented Interfaces:

Encoder<T>, Lexicoder<T>, org.apache.accumulo.core.iterators.TypedValueCombiner.Encoder<T>

public class ReverseLexicoder<T>
extends org.apache.accumulo.core.client.lexicoder.impl.AbstractLexicoder<T>

A lexicoder that flips the sort order from another lexicoder. If this is applied to DateLexicoder, the most recent date will be sorted first and the oldest date will be sorted last. If it's applied to LongLexicoder, the Long.MAX_VALUE will be sorted first and Long.MIN_VALUE will be sorted last, etc...

Since:

1.6.0

Constructor Summary

Constructors

Constructor and Description
ReverseLexicoder(Lexicoder<T> lexicoder)

Method Summary

Methods

Modifier and Type	Method and Description
protected T	decodeUnchecked(byte[] data, int offset, int len) Decodes a byte array without checking if the offset and len exceed the bounds of the actual array.
byte[]	encode(T data)

Methods inherited from class org.apache.accumulo.core.client.lexicoder.AbstractEncoder

decode, decode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.accumulo.core.iterators.TypedValueCombiner.Encoder

decode

Constructor Detail

ReverseLexicoder

public ReverseLexicoder(Lexicoder<T> lexicoder)

Parameters:

lexicoder - The lexicoder who's sort order will be flipped.

Method Detail

encode

public byte[] encode(T data)

decodeUnchecked

protected T decodeUnchecked(byte[] data,
                int offset,
                int len)

Description copied from class: AbstractEncoder

Decodes a byte array without checking if the offset and len exceed the bounds of the actual array.

Specified by:

decodeUnchecked in class AbstractEncoder<T>