Package com.illumon.iris.db.v2.by

Class FirstByStateFactoryImpl

java.lang.Object

com.illumon.iris.db.v2.by.ReaggregatableStatefactory

com.illumon.iris.db.v2.by.IterativeIndexStateFactory

com.illumon.iris.db.v2.by.FirstByStateFactoryImpl

All Implemented Interfaces:

BasicDeflatable<FirstByStateFactoryImpl>, AggregationStateFactory

public class FirstByStateFactoryImpl
extends IterativeIndexStateFactory
implements BasicDeflatable<FirstByStateFactoryImpl>

State factory for firstBy using an InterativeIndexState to create a redirection Index.

Field Summary

Fields inherited from class com.illumon.iris.db.v2.by.IterativeIndexStateFactory

redirectionIndex

Constructor Summary

Constructors

Constructor	Description
FirstByStateFactoryImpl()

Method Summary

Modifier and Type	Method	Description
BasicInflatable<FirstByStateFactoryImpl>	deflate()
AggregationMemoKey	getMemoKey()	Produces a MemoKey for this aggregation state factory.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

FirstByStateFactoryImpl

public FirstByStateFactoryImpl()

Method Details

getMemoKey

public AggregationMemoKey getMemoKey()

Description copied from interface: AggregationStateFactory

Produces a MemoKey for this aggregation state factory.

If two AggregationStateFactories have equal memoKeys, then Table.by(com.illumon.iris.db.v2.by.AggregationStateFactory, com.illumon.iris.db.v2.select.SelectColumn...) operations that have the same group by columns may be memoized. In that case instead of recomputing the result; the original result will be used.

If null is returned, the operation will not be memoized.

Specified by:

getMemoKey in interface AggregationStateFactory

Returns:

an AggregationMemoKey, null if this operation can not be memoized.

toString

public String toString()

Overrides:

toString in class Object

deflate

public BasicInflatable<FirstByStateFactoryImpl> deflate()

Specified by:

deflate in interface BasicDeflatable<FirstByStateFactoryImpl>