org.apache.solr.handler.component

Class StatsField.HllOptions

java.lang.Object

org.apache.solr.handler.component.StatsField.HllOptions

Enclosing class:

StatsField

public static final class StatsField.HllOptions
extends Object

Helper Struct for parsing and encapsulating all of the options relaed to building a HLL

See Also:

StatsField.Stat.cardinality

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Method Summary

Modifier and Type	Method and Description
com.google.common.hash.HashFunction	getHasher() May be null if user has indicated that field values are pre-hashed
int	getLog2m()
int	getRegwidth()
HLL	newHLL()
static StatsField.HllOptions	parseHllOptions(SolrParams localParams, SchemaField field) Creates an HllOptions based on the (local) params specified (if appropriate).

Methods inherited from class java.lang.Object

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

Method Detail

parseHllOptions

public static StatsField.HllOptions parseHllOptions(SolrParams localParams,
                                                    SchemaField field)
                                             throws SolrException

Creates an HllOptions based on the (local) params specified (if appropriate).

Parameters:

localParams - the LocalParams for this StatsField

field - the field corresponding to this StatsField, may be null if these stats are over a value source

Returns:

the StatsField.HllOptions to use based on the params, or null if no HLL should be computed

Throws:

SolrException - if there are invalid options

getLog2m

public int getLog2m()

See Also:

HLL

getRegwidth

public int getRegwidth()

See Also:

HLL

getHasher

public com.google.common.hash.HashFunction getHasher()

May be null if user has indicated that field values are pre-hashed

newHLL

public HLL newHLL()