ml.shifu.guagua.hadoop.io

Class GuaguaWritableSerializer<RESULT extends ml.shifu.guagua.io.Bytable>

java.lang.Object

ml.shifu.guagua.io.BytableSerializer<RESULT>

ml.shifu.guagua.hadoop.io.GuaguaWritableSerializer<RESULT>

All Implemented Interfaces:

ml.shifu.guagua.io.Serializer<RESULT>

public class GuaguaWritableSerializer<RESULT extends ml.shifu.guagua.io.Bytable>
extends ml.shifu.guagua.io.BytableSerializer<RESULT>

GuaguaWritableSerializer is to provide the functionality to support use hadoop writable interface.

By using this, one should set result class name to Writable, not Bytable like this:

 
      conf.set(GuaguaConstants.GUAGUA_RESULT_CLASS, LongWritable.class.getName());
 
 

Constructor Summary

Constructors

Constructor and Description
GuaguaWritableSerializer()

Method Summary

Modifier and Type	Method and Description
RESULT	bytesToObject(byte[] data, String className) De-serialize from bytes to object.

Methods inherited from class ml.shifu.guagua.io.BytableSerializer

objectToBytes

Methods inherited from class java.lang.Object

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

Constructor Detail

GuaguaWritableSerializer

public GuaguaWritableSerializer()

Method Detail

bytesToObject

public RESULT bytesToObject(byte[] data,
                            String className)

De-serialize from bytes to object. One should provide the instance before de-serializing the object.

Specified by:

bytesToObject in interface ml.shifu.guagua.io.Serializer<RESULT extends ml.shifu.guagua.io.Bytable>

Overrides:

bytesToObject in class ml.shifu.guagua.io.BytableSerializer<RESULT extends ml.shifu.guagua.io.Bytable>

Throws:

NullPointerException - if className or data is null.

ml.shifu.guagua.GuaguaRuntimeException - if any IO exception or other reflection exception.