com.yahoo.bullet.query.aggregations

Class Aggregation

java.lang.Object

com.yahoo.bullet.query.aggregations.Aggregation

All Implemented Interfaces:

Configurable, Serializable

Direct Known Subclasses:

CountDistinct, Distribution, GroupAll, GroupBy, Raw, TopK

public abstract class Aggregation
extends Object
implements Configurable, Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Integer	size
protected AggregationType	type

Constructor Summary

Constructors

Constructor and Description
Aggregation()

Method Summary

Modifier and Type	Method and Description
void	configure(BulletConfig config) Takes a BulletConfig containing configuration and applies it to itself.
List<String>	getFields() Gets the aggregation fields.
abstract Strategy	getStrategy(BulletConfig config) Returns a new Strategy instance that handles this aggregation.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

size

protected Integer size

type

protected final AggregationType type

Constructor Detail

Aggregation

public Aggregation()

Method Detail

configure

public void configure(BulletConfig config)

Description copied from interface: Configurable

Takes a BulletConfig containing configuration and applies it to itself.

Specified by:

configure in interface Configurable

Parameters:

config - The configuration containing the settings.

getStrategy

public abstract Strategy getStrategy(BulletConfig config)

Returns a new Strategy instance that handles this aggregation.

Parameters:

config - The BulletConfig containing configuration for the strategy.

Returns:

The created instance of a strategy that can implement this aggregation.

getFields

public List<String> getFields()

Gets the aggregation fields.

Returns:

The aggregation fields.

toString

public String toString()

Overrides:

toString in class Object