io.druid.query.aggregation.variance

Class VarianceBufferAggregator.LongVarianceAggregator

java.lang.Object

io.druid.query.aggregation.variance.VarianceBufferAggregator

io.druid.query.aggregation.variance.VarianceBufferAggregator.LongVarianceAggregator

All Implemented Interfaces:

BufferAggregator

Enclosing class:

VarianceBufferAggregator

public static final class VarianceBufferAggregator.LongVarianceAggregator
extends VarianceBufferAggregator

Nested Class Summary

Nested classes/interfaces inherited from class io.druid.query.aggregation.variance.VarianceBufferAggregator

VarianceBufferAggregator.FloatVarianceAggregator, VarianceBufferAggregator.LongVarianceAggregator, VarianceBufferAggregator.ObjectVarianceAggregator

Field Summary

Fields inherited from class io.druid.query.aggregation.variance.VarianceBufferAggregator

name

Constructor Summary

Constructors

Constructor and Description
LongVarianceAggregator(String name, LongColumnSelector selector)

Method Summary

Modifier and Type	Method and Description
void	aggregate(ByteBuffer buf, int position) Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer.

Methods inherited from class io.druid.query.aggregation.variance.VarianceBufferAggregator

close, get, getFloat, getLong, init

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.druid.query.aggregation.BufferAggregator

relocate

Constructor Detail

LongVarianceAggregator

public LongVarianceAggregator(String name,
                              LongColumnSelector selector)

Method Detail

aggregate

public void aggregate(ByteBuffer buf,
                      int position)

Description copied from interface: BufferAggregator

Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer. Implementations must not change the position, limit or mark of the given buffer

Parameters:

buf - byte buffer storing the byte array representation of the aggregate

position - offset within the byte buffer at which the current aggregate value is stored