Package org.apache.hadoop.mapred.nativetask.serde

Class KVSerializer<K,V>

java.lang.Object

org.apache.hadoop.mapred.nativetask.serde.KVSerializer<K,V>

All Implemented Interfaces:

IKVSerializer

@Private
public class KVSerializer<K,V>
extends java.lang.Object
implements IKVSerializer

Field Summary

Fields

Modifier and Type	Field	Description
static int	KV_HEAD_LENGTH

Constructor Summary

Constructors

Constructor	Description
KVSerializer(java.lang.Class<K> kclass, java.lang.Class<V> vclass)

Method Summary

Modifier and Type	Method	Description
int	deserializeKV(DataInputStream in, SizedWritable<?> key, SizedWritable<?> value)
int	serializeKV(DataOutputStream out, SizedWritable<?> key, SizedWritable<?> value)
int	serializePartitionKV(DataOutputStream out, int partitionId, SizedWritable<?> key, SizedWritable<?> value)
void	updateLength(SizedWritable<?> key, SizedWritable<?> value)	update the length field of SizedWritable

Methods inherited from class java.lang.Object

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

Field Detail

KV_HEAD_LENGTH

public static final int KV_HEAD_LENGTH

See Also:

Constant Field Values

Constructor Detail

KVSerializer

public KVSerializer(java.lang.Class<K> kclass,
                    java.lang.Class<V> vclass)
             throws java.io.IOException

Throws:

java.io.IOException

Method Detail

updateLength

public void updateLength(SizedWritable<?> key,
                         SizedWritable<?> value)
                  throws java.io.IOException

Description copied from interface: IKVSerializer

update the length field of SizedWritable

Specified by:

updateLength in interface IKVSerializer

Throws:

java.io.IOException

serializeKV

public int serializeKV(DataOutputStream out,
                       SizedWritable<?> key,
                       SizedWritable<?> value)
                throws java.io.IOException

Specified by:

serializeKV in interface IKVSerializer

Throws:

java.io.IOException

serializePartitionKV

public int serializePartitionKV(DataOutputStream out,
                                int partitionId,
                                SizedWritable<?> key,
                                SizedWritable<?> value)
                         throws java.io.IOException

Specified by:

serializePartitionKV in interface IKVSerializer

Throws:

java.io.IOException

deserializeKV

public int deserializeKV(DataInputStream in,
                         SizedWritable<?> key,
                         SizedWritable<?> value)
                  throws java.io.IOException

Specified by:

deserializeKV in interface IKVSerializer

Throws:

java.io.IOException