Package org.apache.solr.analytics.function.reduction.data

Class MaxCollector<T extends ReductionData>

java.lang.Object

org.apache.solr.analytics.function.reduction.data.ReductionDataCollector<T>

org.apache.solr.analytics.function.reduction.data.MaxCollector<T>

Type Parameters:

T - The type of data being processed.

Direct Known Subclasses:

MaxCollector.DoubleMaxCollector, MaxCollector.FloatMaxCollector, MaxCollector.IntMaxCollector, MaxCollector.LongMaxCollector, MaxCollector.StringMaxCollector

public abstract class MaxCollector<T extends ReductionData>
extends ReductionDataCollector<T>

Collector of max values.

Supported types are:

• Int
• Long
• Float
• Double
• Date (through longs)
• String

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MaxCollector.DoubleMaxCollector
static class	MaxCollector.FloatMaxCollector
static class	MaxCollector.IntMaxCollector
static class	MaxCollector.LongMaxCollector
static class	MaxCollector.StringMaxCollector

Field Summary

Fields

Modifier and Type	Field	Description
static String	name

Fields inherited from class org.apache.solr.analytics.function.reduction.data.ReductionDataCollector

collectionTargets, ioData, lastingTargets

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MaxCollector(AnalyticsValueStream param)

Method Summary

Modifier and Type	Method	Description
boolean	exists()	Returns true if any of the values being reduce exist, and false if none of them do.
String	getExpressionStr()	The unique expression string of the reduction data collector, given all inputs and parameters.
String	getName()	Get the name of the reduction data collector.
void	setData(ReductionData data)	Finalize the reduction with the collected data stored in the parameter.
void	setMergedData(ReductionData data)	Finalize the reduction with the merged data stored in the parameter.

Methods inherited from class org.apache.solr.analytics.function.reduction.data.ReductionDataCollector

addCollectTarget, addLastingCollectTarget, apply, clearLastingCollectTargets, collect, collectAndApply, dataIO, newData, newDataIO, newDataTarget, submitReservations

Methods inherited from class java.lang.Object

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

Field Detail

name

public static final String name

See Also:

Constant Field Values

Constructor Detail

MaxCollector

protected MaxCollector(AnalyticsValueStream param)

Method Detail

exists

public boolean exists()

Returns true if any of the values being reduce exist, and false if none of them do.

Returns:

whether a max value exists

setMergedData

public void setMergedData(ReductionData data)

Description copied from class: ReductionDataCollector

Finalize the reduction with the merged data stored in the parameter. Once the reduction is finalized, the ReductionFunctions that use this data collector act like regular AnalyticsValue classes that can be accessed through their get<value-type> methods.

(FOR CLOUD)

Specified by:

setMergedData in class ReductionDataCollector<T extends ReductionData>

Parameters:

data - the merged data to compute a reduction for

setData

public void setData(ReductionData data)

Description copied from class: ReductionDataCollector

Finalize the reduction with the collected data stored in the parameter. Once the reduction is finalized, the ReductionFunctions that use this data collector act like regular AnalyticsValue classes that can be accessed through their get<value-type> methods.

(FOR SINGLE-SHARD)

Specified by:

setData in class ReductionDataCollector<T extends ReductionData>

Parameters:

data - the collected data to compute a reduction for

getName

public String getName()

Description copied from class: ReductionDataCollector

Get the name of the reduction data collector. This is the same across all instances of the data collector.

Specified by:

getName in class ReductionDataCollector<T extends ReductionData>

Returns:

the name

getExpressionStr

public String getExpressionStr()

Description copied from class: ReductionDataCollector

The unique expression string of the reduction data collector, given all inputs and parameters. Used during ReductionDataCollector syncing. Since the string should be unique, only one of expression is kept.

Specified by:

getExpressionStr in class ReductionDataCollector<T extends ReductionData>

Returns:

the expression string