org.HdrHistogram

Class PercentileIterator

java.lang.Object

org.HdrHistogram.AbstractHistogramIterator

org.HdrHistogram.PercentileIterator

All Implemented Interfaces:

java.util.Iterator<HistogramIterationValue>

public class PercentileIterator
extends AbstractHistogramIterator
implements java.util.Iterator<HistogramIterationValue>

Used for iterating through histogram values according to percentile levels. The iteration is performed in steps that start at 0% and reduce their distance to 100% according to the percentileTicksPerHalfDistance parameter, ultimately reaching 100% when all recorded histogram values are exhausted.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double	percentileLevelToIterateFrom
(package private) double	percentileLevelToIterateTo
(package private) int	percentileTicksPerHalfDistance
(package private) boolean	reachedLastRecordedValue

Fields inherited from class org.HdrHistogram.AbstractHistogramIterator

arrayTotalCount, countAtThisValue, currentIndex, currentIterationValue, currentValueAtIndex, histogram, nextValueAtIndex, prevValueIteratedTo, totalCountToCurrentIndex, totalCountToPrevIndex, totalValueToCurrentIndex

Constructor Summary

Constructors

Constructor and Description
PercentileIterator(AbstractHistogram histogram, int percentileTicksPerHalfDistance)

Method Summary

Modifier and Type	Method and Description
(package private) double	getPercentileIteratedFrom()
(package private) double	getPercentileIteratedTo()
boolean	hasNext() Returns true if the iteration has more elements.
(package private) void	incrementIterationLevel()
(package private) boolean	reachedIterationLevel()
private void	reset(AbstractHistogram histogram, int percentileTicksPerHalfDistance)
void	reset(int percentileTicksPerHalfDistance) Reset iterator for re-use in a fresh iteration over the same histogram data set.

Methods inherited from class org.HdrHistogram.AbstractHistogramIterator

getValueIteratedTo, incrementSubBucket, next, remove, resetIterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, next, remove

Field Detail

percentileTicksPerHalfDistance

int percentileTicksPerHalfDistance

percentileLevelToIterateTo

double percentileLevelToIterateTo

percentileLevelToIterateFrom

double percentileLevelToIterateFrom

reachedLastRecordedValue

boolean reachedLastRecordedValue

Constructor Detail

PercentileIterator

public PercentileIterator(AbstractHistogram histogram,
                          int percentileTicksPerHalfDistance)

Parameters:

histogram - The histogram this iterator will operate on

percentileTicksPerHalfDistance - The number of equal-sized iteration steps per half-distance to 100%.

Method Detail

reset

public void reset(int percentileTicksPerHalfDistance)

Reset iterator for re-use in a fresh iteration over the same histogram data set.

Parameters:

percentileTicksPerHalfDistance - The number of iteration steps per half-distance to 100%.

reset

private void reset(AbstractHistogram histogram,
                   int percentileTicksPerHalfDistance)

hasNext

public boolean hasNext()

Description copied from class: AbstractHistogramIterator

Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)

Specified by:

hasNext in interface java.util.Iterator<HistogramIterationValue>

Overrides:

hasNext in class AbstractHistogramIterator

Returns:

true if the iterator has more elements.

incrementIterationLevel

void incrementIterationLevel()

Specified by:

incrementIterationLevel in class AbstractHistogramIterator

reachedIterationLevel

boolean reachedIterationLevel()

Specified by:

reachedIterationLevel in class AbstractHistogramIterator

Returns:

true if the current position's data should be emitted by the iterator

getPercentileIteratedTo

double getPercentileIteratedTo()

Overrides:

getPercentileIteratedTo in class AbstractHistogramIterator

getPercentileIteratedFrom

double getPercentileIteratedFrom()

Overrides:

getPercentileIteratedFrom in class AbstractHistogramIterator