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

Class UniqueStateFactory

java.lang.Object

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

com.illumon.iris.db.v2.by.IterativeOperatorStateFactory

com.illumon.iris.db.v2.by.UniqueStateFactory

All Implemented Interfaces:

BasicDeflatable<UniqueStateFactory>, AggregationStateFactory, IterativeChunkedOperatorFactory

public class UniqueStateFactory
extends IterativeOperatorStateFactory
implements BasicDeflatable<UniqueStateFactory>

An Iterative state factory that displays the singluar unique value of the items within a particular state, or default values if none are present, or the values are not unique.

Method Summary

Modifier and Type	Method	Description
boolean	countNulls()
BasicInflatable<UniqueStateFactory>	deflate()
IterativeChunkedAggregationOperator	getChunkedOperator(Class type, String name, boolean exposeInternalColumns)
AggregationMemoKey	getMemoKey()	Produces a MemoKey for this aggregation state factory.
Object	getNoKeyValue()
Object	getNonUniqueValue()
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

getNoKeyValue

public Object getNoKeyValue()

getNonUniqueValue

public Object getNonUniqueValue()

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.

getChunkedOperator

public IterativeChunkedAggregationOperator getChunkedOperator(Class type,
 String name,
 boolean exposeInternalColumns)

Specified by:

getChunkedOperator in interface IterativeChunkedOperatorFactory

Specified by:

getChunkedOperator in class IterativeOperatorStateFactory

countNulls

public boolean countNulls()

deflate

public BasicInflatable<UniqueStateFactory> deflate()

Specified by:

deflate in interface BasicDeflatable<UniqueStateFactory>

toString

public String toString()

Overrides:

toString in class Object