io.druid.query.aggregation.cardinality

Class CardinalityAggregator

java.lang.Object

io.druid.query.aggregation.cardinality.CardinalityAggregator

All Implemented Interfaces:

Aggregator, Closeable, AutoCloseable

public class CardinalityAggregator
extends Object
implements Aggregator

Field Summary

Fields

Modifier and Type	Field and Description
static com.google.common.hash.HashFunction	hashFn

Method Summary

Modifier and Type	Method and Description
void	aggregate()
Aggregator	clone()
void	close()
Object	get()
double	getDouble() The default implementation casts Aggregator.getFloat() to double.
float	getFloat()
long	getLong()

Methods inherited from class java.lang.Object

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

Field Detail

hashFn

public static final com.google.common.hash.HashFunction hashFn

Method Detail

aggregate

public void aggregate()

Specified by:

aggregate in interface Aggregator

get

public Object get()

Specified by:

get in interface Aggregator

getFloat

public float getFloat()

Specified by:

getFloat in interface Aggregator

getLong

public long getLong()

Specified by:

getLong in interface Aggregator

getDouble

public double getDouble()

Description copied from interface: Aggregator

The default implementation casts Aggregator.getFloat() to double. This default method is added to enable smooth backward compatibility, please re-implement it if your aggregators work with numeric double columns.

Specified by:

getDouble in interface Aggregator

clone

public Aggregator clone()

Overrides:

clone in class Object

close

public void close()

Specified by:

close in interface Aggregator

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable