ml.shifu.guagua.mapreduce
类 GuaguaWritableSerializer<RESULT extends ml.shifu.guagua.io.Bytable>

java.lang.Object
  ml.shifu.guagua.io.BytableSerializer<RESULT>
      ml.shifu.guagua.mapreduce.GuaguaWritableSerializer<RESULT>

所有已实现的接口：

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());
 
 

构造方法摘要

GuaguaWritableSerializer()

方法摘要

RESULT

bytesToObject(byte[] data, String className) De-serialize from bytes to object.

从类 ml.shifu.guagua.io.BytableSerializer 继承的方法

objectToBytes

从类 java.lang.Object 继承的方法

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

构造方法详细信息

GuaguaWritableSerializer

public GuaguaWritableSerializer()

方法详细信息

bytesToObject

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

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

指定者：

接口 ml.shifu.guagua.io.Serializer<RESULT extends ml.shifu.guagua.io.Bytable> 中的 bytesToObject

覆盖：

类 ml.shifu.guagua.io.BytableSerializer<RESULT extends ml.shifu.guagua.io.Bytable> 中的 bytesToObject

抛出：

NullPointerException - if className or data is null.

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