com.aliyun.odps.udf

Class RecordSerDe

java.lang.Object

com.aliyun.odps.udf.RecordSerDe

public abstract class RecordSerDe
extends Object

SerDe interface for ODPS record to and from Writable

Constructor Summary

Constructors

Constructor and Description
RecordSerDe()

Method Summary

Modifier and Type	Method and Description
abstract Record	deserialize(Writable blob) Deserialize an Record out of a Writable blob.
abstract Class	getSerializedClass()
abstract void	initialize(Configuration configuration, Properties tableProperties) Initialize the SerDe.
abstract Writable	serialize(Record record) Serialize a ODPS record into Writable Writable.

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordSerDe

public RecordSerDe()

Method Detail

initialize

public abstract void initialize(Configuration configuration,
                                Properties tableProperties)
                         throws SerDeException

Initialize the SerDe.

Parameters:

configuration - Odps configuration

tableProperties - Table properties

Throws:

SerDeException

serialize

public abstract Writable serialize(Record record)
                            throws SerDeException

Serialize a ODPS record into Writable Writable. In most cases, the return value of this function will be constant since the function will reuse the Writable object. If the client wants to keep a copy of the Writable, the client needs to clone the returned value.

Throws:

SerDeException

deserialize

public abstract Record deserialize(Writable blob)
                            throws SerDeException

Deserialize an Record out of a Writable blob.

Parameters:

blob - The Writable object containing a serialized object

Returns:

A Record object representing the contents in the blob.

Throws:

SerDeException

getSerializedClass

public abstract Class getSerializedClass()