org.apache.hadoop.mapred.nativetask.serde

Class NullWritableSerializer

java.lang.Object

org.apache.hadoop.mapred.nativetask.serde.DefaultSerializer

org.apache.hadoop.mapred.nativetask.serde.NullWritableSerializer

All Implemented Interfaces:

INativeComparable, INativeSerializer<org.apache.hadoop.io.Writable>

@InterfaceAudience.Private
public class NullWritableSerializer
extends DefaultSerializer
implements INativeComparable

Constructor Summary

Constructors

Constructor and Description
NullWritableSerializer()

Method Summary

Modifier and Type	Method and Description
int	getLength(org.apache.hadoop.io.Writable w) get length of data to be serialized.

Methods inherited from class org.apache.hadoop.mapred.nativetask.serde.DefaultSerializer

deserialize, serialize

Methods inherited from class java.lang.Object

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

Constructor Detail

NullWritableSerializer

public NullWritableSerializer()

Method Detail

getLength

public int getLength(org.apache.hadoop.io.Writable w)
              throws IOException

Description copied from interface: INativeSerializer

get length of data to be serialized. If the data length is already known (like IntWritable) and could immediately be returned from this method, it is good chance to implement customized NativeSerializer for efficiency

Specified by:

getLength in interface INativeSerializer<org.apache.hadoop.io.Writable>

Overrides:

getLength in class DefaultSerializer

Throws:

IOException