org.apache.hadoop.hive.serde2

Class MetadataTypedColumnsetSerDe

java.lang.Object

org.apache.hadoop.hive.serde2.AbstractSerDe

org.apache.hadoop.hive.serde2.MetadataTypedColumnsetSerDe

All Implemented Interfaces:

Deserializer, SerDe, Serializer

public class MetadataTypedColumnsetSerDe
extends AbstractSerDe

MetadataTypedColumnsetSerDe.

Field Summary

Fields

Modifier and Type	Field and Description
static String	defaultNullString
static String	DefaultSeparator
static org.slf4j.Logger	LOG

Fields inherited from class org.apache.hadoop.hive.serde2.AbstractSerDe

configuration, log, partitionProperties, properties, tableProperties

Constructor Summary

Constructors

Constructor and Description
MetadataTypedColumnsetSerDe()

Method Summary

Modifier and Type	Method and Description
static Object	deserialize(ColumnSet c, String row, String sep, String nullString, int limit) Split the row into columns.
Object	deserialize(org.apache.hadoop.io.Writable field) Deserialize an object out of a Writable blob.
ObjectInspector	getObjectInspector() Get the object inspector that can be used to navigate through the internal structure of the Object returned from deserialize(...).
Class<? extends org.apache.hadoop.io.Writable>	getSerializedClass() Returns the Writable class that would be returned by the serialize method.
void	initialize(org.apache.hadoop.conf.Configuration configuration, Properties tableProperties, Properties partitionProperties) Initialize the SerDe.
org.apache.hadoop.io.Writable	serialize(Object obj, ObjectInspector objInspector) Serialize an object by navigating inside the Object with the ObjectInspector.
String	toString()

Methods inherited from class org.apache.hadoop.hive.serde2.AbstractSerDe

getColumnComments, getColumnNames, getColumnTypes, getConfiguration, getPartitionColumnComments, getPartitionColumnNames, getPartitionColumnTypes, getSerDeStats, parseColumnComments, parseColumnNames, parseColumnNames, parseColumnTypes, parseColumnTypes, shouldStoreFieldsInMetastore

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hive.serde2.SerDe

handleJobLevelConfiguration

Field Detail

LOG

public static final org.slf4j.Logger LOG

DefaultSeparator

public static final String DefaultSeparator

See Also:

Constant Field Values

defaultNullString

public static final String defaultNullString

See Also:

Constant Field Values

Constructor Detail

MetadataTypedColumnsetSerDe

public MetadataTypedColumnsetSerDe()
                            throws SerDeException

Throws:

SerDeException

Method Detail

toString

public String toString()

Overrides:

toString in class AbstractSerDe

initialize

public void initialize(org.apache.hadoop.conf.Configuration configuration,
                       Properties tableProperties,
                       Properties partitionProperties)
                throws SerDeException

Description copied from class: AbstractSerDe

Initialize the SerDe. By default, this will use one set of properties, either the table properties or the partition properties. If a SerDe needs access to both sets, it should override this method. Eventually, once all SerDes have implemented this method, we should convert it to an abstract method.

Overrides:

initialize in class AbstractSerDe

Parameters:

configuration - Hadoop configuration

tableProperties - Table properties

partitionProperties - Partition properties (may be null if table has no partitions)

Throws:

SerDeException - if SerDe fails to initialize

deserialize

public static Object deserialize(ColumnSet c,
                                 String row,
                                 String sep,
                                 String nullString,
                                 int limit)
                          throws Exception

Split the row into columns.

Parameters:

limit - up to limit columns will be produced (the last column takes all the rest), -1 for unlimited.

Returns:

The ColumnSet object

Throws:

Exception

deserialize

public Object deserialize(org.apache.hadoop.io.Writable field)
                   throws SerDeException

Description copied from interface: Deserializer

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 deserialized value by calling ObjectInspectorUtils.getStandardObject().

Specified by:

deserialize in interface Deserializer

Overrides:

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

getObjectInspector

public ObjectInspector getObjectInspector()
                                   throws SerDeException

Description copied from interface: Deserializer

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

Throws:

SerDeException

getSerializedClass

public Class<? extends org.apache.hadoop.io.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 org.apache.hadoop.io.Writable serialize(Object obj,
                                               ObjectInspector objInspector)
                                        throws SerDeException

Description copied from interface: Serializer

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

Overrides:

serialize in class AbstractSerDe

Throws:

SerDeException