org.apache.hadoop.hbase.codec

Class KeyValueCodec

java.lang.Object

org.apache.hadoop.hbase.codec.KeyValueCodec

All Implemented Interfaces:

Codec

@InterfaceAudience.Private
public class KeyValueCodec
extends Object
implements Codec

Codec that does KeyValue version 1 serialization.

Encodes by casting Cell to KeyValue and writing out the backing array with a length prefix. This is how KVs were serialized in Puts, Deletes and Results pre-0.96. Its what would happen if you called the Writable#write KeyValue implementation. This encoder will fail if the passed Cell is not an old-school pre-0.96 KeyValue. Does not copy bytes writing. It just writes them direct to the passed stream.

If you wrote two KeyValues to this encoder, it would look like this in the stream:

 length-of-KeyValue1 // A java int with the length of KeyValue1 backing array
 KeyValue1 backing array filled with a KeyValue serialized in its particular format
 length-of-KeyValue2
 KeyValue2 backing array
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	KeyValueCodec.KeyValueDecoder
static class	KeyValueCodec.KeyValueEncoder

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.codec.Codec

Codec.Decoder, Codec.Encoder

Constructor Summary

Constructors

Constructor and Description
KeyValueCodec()

Method Summary

Methods

Modifier and Type	Method and Description
Codec.Decoder	getDecoder(InputStream is) Implementation depends on InputStream.available()
Codec.Encoder	getEncoder(OutputStream os)

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyValueCodec

public KeyValueCodec()

Method Detail

getDecoder

public Codec.Decoder getDecoder(InputStream is)

Implementation depends on InputStream.available()

Specified by:

getDecoder in interface Codec

getEncoder

public Codec.Encoder getEncoder(OutputStream os)

Specified by:

getEncoder in interface Codec