org.apache.druid.segment.serde

Class NullColumnPartSerde

java.lang.Object

org.apache.druid.segment.serde.NullColumnPartSerde

All Implemented Interfaces:

ColumnPartSerde

public class NullColumnPartSerde
extends Object
implements ColumnPartSerde

A ColumnPartSerde to read and write null-only columns. Its serializer is no-op as nothing is stored for null-only columns. Its deserializer creates necessary column metadata and indexes when the column is read.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.segment.serde.ColumnPartSerde

ColumnPartSerde.Deserializer

Constructor Summary

Constructors

Constructor and Description
NullColumnPartSerde(int numRows, BitmapSerdeFactory bitmapSerdeFactory)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
BitmapSerdeFactory	getBitmapSerdeFactory() Deprecated.
ColumnPartSerde.Deserializer	getDeserializer() Returns a Deserializer to read a column from a segment.
int	getNumRows()
Serializer	getSerializer()
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

NullColumnPartSerde

public NullColumnPartSerde(int numRows,
                           BitmapSerdeFactory bitmapSerdeFactory)

Method Detail

getNumRows

public int getNumRows()

getBitmapSerdeFactory

@Deprecated
public BitmapSerdeFactory getBitmapSerdeFactory()

Deprecated.

This is no longer used for anything, but is required for backwards compatibility, so that segments with explicit null columns can be read with 0.23

getSerializer

@Nullable
public Serializer getSerializer()

Specified by:

getSerializer in interface ColumnPartSerde

getDeserializer

public ColumnPartSerde.Deserializer getDeserializer()

Description copied from interface: ColumnPartSerde

Returns a Deserializer to read a column from a segment.

Specified by:

getDeserializer in interface ColumnPartSerde

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object