io.druid.query.aggregation.histogram

Class ApproximateHistogramFoldingAggregatorFactory

java.lang.Object

io.druid.query.aggregation.AggregatorFactory

io.druid.query.aggregation.histogram.ApproximateHistogramAggregatorFactory

io.druid.query.aggregation.histogram.ApproximateHistogramFoldingAggregatorFactory

All Implemented Interfaces:

Cacheable

public class ApproximateHistogramFoldingAggregatorFactory
extends ApproximateHistogramAggregatorFactory

Field Summary

Fields inherited from class io.druid.query.aggregation.histogram.ApproximateHistogramAggregatorFactory

fieldName, lowerLimit, name, numBuckets, resolution, upperLimit

Constructor Summary

Constructors

Constructor and Description
ApproximateHistogramFoldingAggregatorFactory(String name, String fieldName, Integer resolution, Integer numBuckets, Float lowerLimit, Float upperLimit)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Aggregator	factorize(ColumnSelectorFactory metricFactory)
BufferAggregator	factorizeBuffered(ColumnSelectorFactory metricFactory)
byte[]	getCacheKey() Get a byte array used as a cache key.
AggregatorFactory	getCombiningFactory() Returns an AggregatorFactory that can be used to combine the output of aggregators from this factory.
int	hashCode()
String	toString()

Methods inherited from class io.druid.query.aggregation.histogram.ApproximateHistogramAggregatorFactory

combine, deserialize, finalizeComputation, getComparator, getFieldName, getLowerLimit, getMaxIntermediateSize, getMergingFactory, getName, getNumBuckets, getRequiredColumns, getResolution, getTypeName, getUpperLimit, requiredFields

Methods inherited from class io.druid.query.aggregation.AggregatorFactory

mergeAggregators

Methods inherited from class java.lang.Object

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

Constructor Detail

ApproximateHistogramFoldingAggregatorFactory

public ApproximateHistogramFoldingAggregatorFactory(String name,
                                                    String fieldName,
                                                    Integer resolution,
                                                    Integer numBuckets,
                                                    Float lowerLimit,
                                                    Float upperLimit)

Method Detail

factorize

public Aggregator factorize(ColumnSelectorFactory metricFactory)

Overrides:

factorize in class ApproximateHistogramAggregatorFactory

factorizeBuffered

public BufferAggregator factorizeBuffered(ColumnSelectorFactory metricFactory)

Overrides:

factorizeBuffered in class ApproximateHistogramAggregatorFactory

getCombiningFactory

public AggregatorFactory getCombiningFactory()

Description copied from class: AggregatorFactory

Returns an AggregatorFactory that can be used to combine the output of aggregators from this factory. This generally amounts to simply creating a new factory that is the same as the current except with its input column renamed to the same as the output column.

Overrides:

getCombiningFactory in class ApproximateHistogramAggregatorFactory

Returns:

a new Factory that can be used for operations on top of data output from the current factory.

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 ApproximateHistogramAggregatorFactory

Returns:

a cache key

equals

public boolean equals(Object o)

Overrides:

equals in class ApproximateHistogramAggregatorFactory

hashCode

public int hashCode()

Overrides:

hashCode in class ApproximateHistogramAggregatorFactory

toString

public String toString()

Overrides:

toString in class ApproximateHistogramAggregatorFactory