org.apache.hadoop.hive.accumulo.serde

Class AccumuloSerDe

java.lang.Object

org.apache.hadoop.hive.accumulo.serde.AccumuloSerDe

All Implemented Interfaces:

Deserializer, SerDe, Serializer

public class AccumuloSerDe
extends Object
implements SerDe

Deserialization from Accumulo to LazyAccumuloRow for Hive.

Constructor Summary

Constructors

Constructor and Description
AccumuloSerDe()

Method Summary

Methods

Modifier and Type	Method and Description
Object	deserialize(org.apache.hadoop.io.Writable writable) Deserialize an object out of a Writable blob.
LazyAccumuloRow	getCachedRow() For testing purposes.
protected ArrayList<ObjectInspector>	getColumnObjectInspectors(List<TypeInfo> columnTypes, LazySerDeParameters serDeParams, List<ColumnMapping> mappings, AccumuloRowIdFactory factory)
boolean	getIteratorPushdown()
ObjectInspector	getObjectInspector() Get the object inspector that can be used to navigate through the internal structure of the Object returned from deserialize(...).
AccumuloSerDeParameters	getParams()
SerDeStats	getSerDeStats() Returns statistics collected when serializing
Class<? extends org.apache.hadoop.io.Writable>	getSerializedClass() Returns the Writable class that would be returned by the serialize method.
protected AccumuloRowSerializer	getSerializer()
void	initialize(org.apache.hadoop.conf.Configuration conf, Properties properties) Initialize the HiveDeserializer.
org.apache.hadoop.io.Writable	serialize(Object o, ObjectInspector objectInspector) 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

Constructor Detail

AccumuloSerDe

public AccumuloSerDe()

Method Detail

initialize

public void initialize(org.apache.hadoop.conf.Configuration conf,
              Properties properties)
                throws SerDeException

Description copied from interface: Deserializer

Initialize the HiveDeserializer.

Specified by:

initialize in interface Deserializer

Specified by:

initialize in interface Serializer

Parameters:

conf - System properties

properties - table properties

Throws:

SerDeException

getColumnObjectInspectors

protected ArrayList<ObjectInspector> getColumnObjectInspectors(List<TypeInfo> columnTypes,
                                                   LazySerDeParameters serDeParams,
                                                   List<ColumnMapping> mappings,
                                                   AccumuloRowIdFactory factory)
                                                        throws SerDeException

Throws:

SerDeException

getCachedRow

public LazyAccumuloRow getCachedRow()

For testing purposes.

getSerializedClass

public Class<? extends org.apache.hadoop.io.Writable> getSerializedClass()

Description copied from interface: Serializer

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

serialize

public org.apache.hadoop.io.Writable serialize(Object o,
                                      ObjectInspector objectInspector)
                                        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

Throws:

SerDeException

deserialize

public Object deserialize(org.apache.hadoop.io.Writable writable)
                   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

Parameters:

writable - 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(...).

Specified by:

getObjectInspector in interface Deserializer

Throws:

SerDeException

getSerDeStats

public SerDeStats getSerDeStats()

Description copied from interface: Deserializer

Returns statistics collected when serializing

Specified by:

getSerDeStats in interface Deserializer

Specified by:

getSerDeStats in interface Serializer

getParams

public AccumuloSerDeParameters getParams()

getIteratorPushdown

public boolean getIteratorPushdown()

getSerializer

protected AccumuloRowSerializer getSerializer()