Package org.apache.pinot.segment.local.aggregator

Class DistinctCountHLLValueAggregator

java.lang.Object

org.apache.pinot.segment.local.aggregator.DistinctCountHLLValueAggregator

All Implemented Interfaces:

ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

public class DistinctCountHLLValueAggregator
extends Object
implements ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

Field Summary

Fields

Modifier and Type	Field	Description
static FieldSpec.DataType	AGGREGATED_VALUE_TYPE

Constructor Summary

Constructors

Constructor	Description
DistinctCountHLLValueAggregator()

Method Summary

Modifier and Type	Method	Description
com.clearspring.analytics.stream.cardinality.HyperLogLog	applyAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value, com.clearspring.analytics.stream.cardinality.HyperLogLog aggregatedValue)	Applies an aggregated value to the current aggregated value.
com.clearspring.analytics.stream.cardinality.HyperLogLog	applyRawValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value, Object rawValue)	Applies a raw value to the current aggregated value.
com.clearspring.analytics.stream.cardinality.HyperLogLog	cloneAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value)	Clones an aggregated value.
com.clearspring.analytics.stream.cardinality.HyperLogLog	deserializeAggregatedValue(byte[] bytes)	De-serializes an aggregated value from a byte array.
FieldSpec.DataType	getAggregatedValueType()	Returns the data type of the aggregated value.
AggregationFunctionType	getAggregationType()	Returns the type of the aggregation.
com.clearspring.analytics.stream.cardinality.HyperLogLog	getInitialAggregatedValue(Object rawValue)	Returns the initial aggregated value.
int	getMaxAggregatedValueByteSize()	Returns the maximum size in bytes of the aggregated values seen so far.
byte[]	serializeAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value)	Serializes an aggregated value into a byte array.

Methods inherited from class java.lang.Object

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

Field Detail

AGGREGATED_VALUE_TYPE

public static final FieldSpec.DataType AGGREGATED_VALUE_TYPE

Constructor Detail

DistinctCountHLLValueAggregator

public DistinctCountHLLValueAggregator()

Method Detail

getAggregationType

public AggregationFunctionType getAggregationType()

Description copied from interface: ValueAggregator

Returns the type of the aggregation.

Specified by:

getAggregationType in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

getAggregatedValueType

public FieldSpec.DataType getAggregatedValueType()

Description copied from interface: ValueAggregator

Returns the data type of the aggregated value.

Specified by:

getAggregatedValueType in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

getInitialAggregatedValue

public com.clearspring.analytics.stream.cardinality.HyperLogLog getInitialAggregatedValue(Object rawValue)

Description copied from interface: ValueAggregator

Returns the initial aggregated value.

Specified by:

getInitialAggregatedValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

applyRawValue

public com.clearspring.analytics.stream.cardinality.HyperLogLog applyRawValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value,
                                                                              Object rawValue)

Description copied from interface: ValueAggregator

Applies a raw value to the current aggregated value.

NOTE: if value is mutable, will directly modify the value.

Specified by:

applyRawValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

applyAggregatedValue

public com.clearspring.analytics.stream.cardinality.HyperLogLog applyAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value,
                                                                                     com.clearspring.analytics.stream.cardinality.HyperLogLog aggregatedValue)

Description copied from interface: ValueAggregator

Applies an aggregated value to the current aggregated value.

NOTE: if value is mutable, will directly modify the value.

Specified by:

applyAggregatedValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

cloneAggregatedValue

public com.clearspring.analytics.stream.cardinality.HyperLogLog cloneAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value)

Description copied from interface: ValueAggregator

Clones an aggregated value.

Specified by:

cloneAggregatedValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

getMaxAggregatedValueByteSize

public int getMaxAggregatedValueByteSize()

Description copied from interface: ValueAggregator

Returns the maximum size in bytes of the aggregated values seen so far.

Specified by:

getMaxAggregatedValueByteSize in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

serializeAggregatedValue

public byte[] serializeAggregatedValue(com.clearspring.analytics.stream.cardinality.HyperLogLog value)

Description copied from interface: ValueAggregator

Serializes an aggregated value into a byte array.

Specified by:

serializeAggregatedValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>

deserializeAggregatedValue

public com.clearspring.analytics.stream.cardinality.HyperLogLog deserializeAggregatedValue(byte[] bytes)

Description copied from interface: ValueAggregator

De-serializes an aggregated value from a byte array.

Specified by:

deserializeAggregatedValue in interface ValueAggregator<Object,com.clearspring.analytics.stream.cardinality.HyperLogLog>