Package org.apache.druid.query.topn

Class AlphaNumericTopNMetricSpec

java.lang.Object

org.apache.druid.query.topn.LexicographicTopNMetricSpec

org.apache.druid.query.topn.AlphaNumericTopNMetricSpec

All Implemented Interfaces:

Cacheable, TopNMetricSpec

public class AlphaNumericTopNMetricSpec
extends LexicographicTopNMetricSpec

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Comparator<String>	COMPARATOR

Constructor Summary

Constructors

Constructor	Description
AlphaNumericTopNMetricSpec(String previousStop)

Method Summary

Modifier and Type	Method	Description
<T> TopNMetricSpecBuilder<T>	configureOptimizer(TopNMetricSpecBuilder<T> builder)
byte[]	getCacheKey()	Get a byte array used as a cache key.
Comparator	getComparator(List<AggregatorFactory> aggregatorSpecs, List<PostAggregator> postAggregatorSpecs)
String	toString()

Methods inherited from class org.apache.druid.query.topn.LexicographicTopNMetricSpec

canBeOptimizedUnordered, equals, getMetricName, getPreviousStop, getResultBuilder, hashCode, initTopNAlgorithmSelector, verifyPreconditions

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

COMPARATOR

protected static final Comparator<String> COMPARATOR

Constructor Details

AlphaNumericTopNMetricSpec

public AlphaNumericTopNMetricSpec(String previousStop)

Method Details

getComparator

public Comparator getComparator(List<AggregatorFactory> aggregatorSpecs,
 List<PostAggregator> postAggregatorSpecs)

Specified by:

getComparator in interface TopNMetricSpec

Overrides:

getComparator in class LexicographicTopNMetricSpec

getCacheKey

public byte[] getCacheKey()

Description copied from interface: Cacheable

Get a byte array used as a cache key.

Specified by:

getCacheKey in interface Cacheable

Overrides:

getCacheKey in class LexicographicTopNMetricSpec

Returns:

bytes to be used as cache key - or null if this object should not be cached.

configureOptimizer

public <T> TopNMetricSpecBuilder<T> configureOptimizer(TopNMetricSpecBuilder<T> builder)

Specified by:

configureOptimizer in interface TopNMetricSpec

Overrides:

configureOptimizer in class LexicographicTopNMetricSpec

toString

public String toString()

Overrides:

toString in class LexicographicTopNMetricSpec