io.druid.query.topn

Interface TopNMetricSpec

All Known Implementing Classes:

AlphaNumericTopNMetricSpec, InvertedTopNMetricSpec, LegacyTopNMetricSpec, LexicographicTopNMetricSpec, NumericTopNMetricSpec

public interface TopNMetricSpec

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canBeOptimizedUnordered()
<T> TopNMetricSpecBuilder<T>	configureOptimizer(TopNMetricSpecBuilder<T> builder)
byte[]	getCacheKey()
Comparator	getComparator(List<AggregatorFactory> aggregatorSpecs, List<PostAggregator> postAggregatorSpecs)
String	getMetricName(DimensionSpec dimSpec)
TopNResultBuilder	getResultBuilder(org.joda.time.DateTime timestamp, DimensionSpec dimSpec, int threshold, Comparator comparator, List<AggregatorFactory> aggFactories, List<PostAggregator> postAggs)
void	initTopNAlgorithmSelector(TopNAlgorithmSelector selector)
void	verifyPreconditions(List<AggregatorFactory> aggregatorSpecs, List<PostAggregator> postAggregatorSpecs)

Method Detail

verifyPreconditions

void verifyPreconditions(List<AggregatorFactory> aggregatorSpecs,
                       List<PostAggregator> postAggregatorSpecs)

getComparator

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

getResultBuilder

TopNResultBuilder getResultBuilder(org.joda.time.DateTime timestamp,
                                 DimensionSpec dimSpec,
                                 int threshold,
                                 Comparator comparator,
                                 List<AggregatorFactory> aggFactories,
                                 List<PostAggregator> postAggs)

getCacheKey

byte[] getCacheKey()

configureOptimizer

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

initTopNAlgorithmSelector

void initTopNAlgorithmSelector(TopNAlgorithmSelector selector)

getMetricName

String getMetricName(DimensionSpec dimSpec)

canBeOptimizedUnordered

boolean canBeOptimizedUnordered()