Package org.apache.druid.query.topn

Class DimensionTopNMetricSpec

java.lang.Object

org.apache.druid.query.topn.DimensionTopNMetricSpec

All Implemented Interfaces:

Cacheable, TopNMetricSpec

public class DimensionTopNMetricSpec
extends Object
implements TopNMetricSpec

Constructor Summary

Constructors

Constructor	Description
DimensionTopNMetricSpec(String previousStop, StringComparator ordering)

Method Summary

Modifier and Type	Method	Description
boolean	canBeOptimizedUnordered()
<T> TopNMetricSpecBuilder<T>	configureOptimizer(TopNMetricSpecBuilder<T> builder)
boolean	equals(Object o)
byte[]	getCacheKey()	Get a byte array used as a cache key.
Comparator	getComparator(List<AggregatorFactory> aggregatorSpecs, List<PostAggregator> postAggregatorSpecs)
String	getMetricName(DimensionSpec dimSpec)
StringComparator	getOrdering()
String	getPreviousStop()
TopNResultBuilder	getResultBuilder(org.joda.time.DateTime timestamp, DimensionSpec dimSpec, int threshold, Comparator comparator, List<AggregatorFactory> aggFactories, List<PostAggregator> postAggs)
int	hashCode()
void	initTopNAlgorithmSelector(TopNAlgorithmSelector selector)
String	toString()
void	verifyPreconditions(List<AggregatorFactory> aggregatorSpecs, List<PostAggregator> postAggregatorSpecs)

Methods inherited from class java.lang.Object

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

Constructor Details

DimensionTopNMetricSpec

public DimensionTopNMetricSpec(String previousStop,
 StringComparator ordering)

Method Details

verifyPreconditions

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

Specified by:

verifyPreconditions in interface TopNMetricSpec

getPreviousStop

@Nullable
public String getPreviousStop()

getOrdering

public StringComparator getOrdering()

getComparator

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

Specified by:

getComparator in interface TopNMetricSpec

getResultBuilder

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

Specified by:

getResultBuilder in interface TopNMetricSpec

getCacheKey

public byte[] getCacheKey()

Description copied from interface: Cacheable

Get a byte array used as a cache key.

Specified by:

getCacheKey in interface Cacheable

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

initTopNAlgorithmSelector

public void initTopNAlgorithmSelector(TopNAlgorithmSelector selector)

Specified by:

initTopNAlgorithmSelector in interface TopNMetricSpec

getMetricName

public String getMetricName(DimensionSpec dimSpec)

Specified by:

getMetricName in interface TopNMetricSpec

canBeOptimizedUnordered

public boolean canBeOptimizedUnordered()

Specified by:

canBeOptimizedUnordered in interface TopNMetricSpec

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object