Package org.HdrHistogram
Class LogarithmicIterator
- java.lang.Object
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- org.HdrHistogram.AbstractHistogramIterator
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- org.HdrHistogram.LogarithmicIterator
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- All Implemented Interfaces:
java.util.Iterator<HistogramIterationValue>
public class LogarithmicIterator extends AbstractHistogramIterator implements java.util.Iterator<HistogramIterationValue>
Used for iterating through histogram values in logarithmically increasing levels. The iteration is performed in steps that start at valueUnitsInFirstBucket and increase exponentially according to logBase, terminating when all recorded histogram values are exhausted. Note that each iteration "bucket" includes values up to and including the next bucket boundary value.
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Field Summary
Fields Modifier and Type Field Description (package private) long
currentStepHighestValueReportingLevel
(package private) long
currentStepLowestValueReportingLevel
(package private) double
logBase
(package private) double
nextValueReportingLevel
(package private) long
valueUnitsInFirstBucket
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Fields inherited from class org.HdrHistogram.AbstractHistogramIterator
arrayTotalCount, countAtThisValue, currentIndex, currentIterationValue, currentValueAtIndex, histogram, nextValueAtIndex, prevValueIteratedTo, totalCountToCurrentIndex, totalCountToPrevIndex, totalValueToCurrentIndex
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Constructor Summary
Constructors Constructor Description LogarithmicIterator(AbstractHistogram histogram, long valueUnitsInFirstBucket, double logBase)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description (package private) long
getValueIteratedTo()
boolean
hasNext()
Returns true if the iteration has more elements.(package private) void
incrementIterationLevel()
(package private) boolean
reachedIterationLevel()
void
reset(long valueUnitsInFirstBucket, double logBase)
Reset iterator for re-use in a fresh iteration over the same histogram data set.private void
reset(AbstractHistogram histogram, long valueUnitsInFirstBucket, double logBase)
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Methods inherited from class org.HdrHistogram.AbstractHistogramIterator
getPercentileIteratedFrom, getPercentileIteratedTo, incrementSubBucket, next, remove, resetIterator
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Field Detail
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valueUnitsInFirstBucket
long valueUnitsInFirstBucket
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logBase
double logBase
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nextValueReportingLevel
double nextValueReportingLevel
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currentStepHighestValueReportingLevel
long currentStepHighestValueReportingLevel
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currentStepLowestValueReportingLevel
long currentStepLowestValueReportingLevel
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Constructor Detail
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LogarithmicIterator
public LogarithmicIterator(AbstractHistogram histogram, long valueUnitsInFirstBucket, double logBase)
- Parameters:
histogram
- The histogram this iterator will operate onvalueUnitsInFirstBucket
- the size (in value units) of the first value bucket steplogBase
- the multiplier by which the bucket size is expanded in each iteration step.
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Method Detail
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reset
public void reset(long valueUnitsInFirstBucket, double logBase)
Reset iterator for re-use in a fresh iteration over the same histogram data set.- Parameters:
valueUnitsInFirstBucket
- the size (in value units) of the first value bucket steplogBase
- the multiplier by which the bucket size is expanded in each iteration step.
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reset
private void reset(AbstractHistogram histogram, long valueUnitsInFirstBucket, double logBase)
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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 interfacejava.util.Iterator<HistogramIterationValue>
- Overrides:
hasNext
in classAbstractHistogramIterator
- Returns:
- true if the iterator has more elements.
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incrementIterationLevel
void incrementIterationLevel()
- Specified by:
incrementIterationLevel
in classAbstractHistogramIterator
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getValueIteratedTo
long getValueIteratedTo()
- Overrides:
getValueIteratedTo
in classAbstractHistogramIterator
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reachedIterationLevel
boolean reachedIterationLevel()
- Specified by:
reachedIterationLevel
in classAbstractHistogramIterator
- Returns:
- true if the current position's data should be emitted by the iterator
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