org.apache.hadoop.hive.serde2.dynamic_type

Class DynamicSerDe

java.lang.Object

org.apache.hadoop.hive.serde2.AbstractSerDe

org.apache.hadoop.hive.serde2.dynamic_type.DynamicSerDe

All Implemented Interfaces:

Deserializer, SerDe, Serializer

public class DynamicSerDe
extends AbstractSerDe

DynamicSerDe.

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteStream.Input	bis_
protected ByteStream.Output	bos_
protected org.apache.thrift.protocol.TProtocol	iprot_
static org.apache.commons.logging.Log	LOG
static java.lang.String	META_TABLE_NAME
protected org.apache.thrift.protocol.TProtocol	oprot_ protocols are protected in case any of their properties need to be queried from another class in this package.

Constructor Summary

Constructors

Constructor and Description
DynamicSerDe()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	deserialize(Writable field) Deserialize an object out of a Writable blob.
static ObjectInspector	dynamicSerDeStructBaseToObjectInspector(DynamicSerDeTypeBase bt)
ObjectInspector	getObjectInspector() Get the object inspector that can be used to navigate through the internal structure of the Object returned from deserialize(...).
SerDeStats	getSerDeStats() Returns statistics collected when serializing
java.lang.Class<? extends Writable>	getSerializedClass() Returns the Writable class that would be returned by the serialize method.
void	initialize(Configuration job, java.util.Properties tbl) Initialize the HiveSerializer.
Writable	serialize(java.lang.Object obj, ObjectInspector objInspector) Serialize an object by navigating inside the Object with the ObjectInspector.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

META_TABLE_NAME

public static final java.lang.String META_TABLE_NAME

See Also:

Constant Field Values

bis_

protected transient ByteStream.Input bis_

bos_

protected transient ByteStream.Output bos_

oprot_

protected transient org.apache.thrift.protocol.TProtocol oprot_

protocols are protected in case any of their properties need to be queried from another class in this package. For TCTLSeparatedProtocol for example, may want to query the separators.

iprot_

protected transient org.apache.thrift.protocol.TProtocol iprot_

Constructor Detail

DynamicSerDe

public DynamicSerDe()

Method Detail

initialize

public void initialize(Configuration job,
                       java.util.Properties tbl)
                throws SerDeException

Description copied from class: AbstractSerDe

Initialize the HiveSerializer.

Specified by:

initialize in interface Deserializer

Specified by:

initialize in interface Serializer

Specified by:

initialize in class AbstractSerDe

Parameters:

job - System properties

tbl - table properties

Throws:

SerDeException

deserialize

public java.lang.Object deserialize(Writable field)
                             throws SerDeException

Description copied from class: AbstractSerDe

Deserialize an object out of a Writable blob. In most cases, the return value of this function will be constant since the function will reuse the returned object. If the client wants to keep a copy of the object, the client needs to clone the returned value by calling ObjectInspectorUtils.getStandardObject().

Specified by:

deserialize in interface Deserializer

Specified by:

deserialize in class AbstractSerDe

Parameters:

field - The Writable object containing a serialized object

Returns:

A Java object representing the contents in the blob.

Throws:

SerDeException

dynamicSerDeStructBaseToObjectInspector

public static ObjectInspector dynamicSerDeStructBaseToObjectInspector(DynamicSerDeTypeBase bt)
                                                               throws SerDeException

Throws:

SerDeException

getObjectInspector

public ObjectInspector getObjectInspector()
                                   throws SerDeException

Description copied from class: AbstractSerDe

Get the object inspector that can be used to navigate through the internal structure of the Object returned from deserialize(...).

Specified by:

getObjectInspector in interface Deserializer

Specified by:

getObjectInspector in class AbstractSerDe

Throws:

SerDeException

getSerializedClass

public java.lang.Class<? extends Writable> getSerializedClass()

Description copied from class: AbstractSerDe

Returns the Writable class that would be returned by the serialize method. This is used to initialize SequenceFile header.

Specified by:

getSerializedClass in interface Serializer

Specified by:

getSerializedClass in class AbstractSerDe

serialize

public Writable serialize(java.lang.Object obj,
                          ObjectInspector objInspector)
                   throws SerDeException

Description copied from class: AbstractSerDe

Serialize an object by navigating inside the Object with the ObjectInspector. 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.

Specified by:

serialize in interface Serializer

Specified by:

serialize in class AbstractSerDe

Throws:

SerDeException

getSerDeStats

public SerDeStats getSerDeStats()

Description copied from class: AbstractSerDe

Returns statistics collected when serializing

Specified by:

getSerDeStats in interface Deserializer

Specified by:

getSerDeStats in interface Serializer

Specified by:

getSerDeStats in class AbstractSerDe