org.apache.parquet.column.statistics

Class DoubleStatistics

java.lang.Object

org.apache.parquet.column.statistics.Statistics<Double>

org.apache.parquet.column.statistics.DoubleStatistics

public class DoubleStatistics
extends Statistics<Double>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.parquet.column.statistics.Statistics

Statistics.Builder

Constructor Summary

Constructors

Constructor and Description
DoubleStatistics() Deprecated. will be removed in 2.0.0. Use Statistics.createStats(org.apache.parquet.schema.Type) instead

Method Summary

Modifier and Type	Method and Description
int	compareMaxToValue(double value)
int	compareMinToValue(double value)
DoubleStatistics	copy()
Double	genericGetMax() Returns the max value in the statistics.
Double	genericGetMin() Returns the min value in the statistics.
double	getMax()
byte[]	getMaxBytes() Abstract method to return the max value as a byte array
double	getMin()
byte[]	getMinBytes() Abstract method to return the min value as a byte array
void	initializeStats(double min_value, double max_value)
boolean	isSmallerThan(long size) Abstract method to return whether the min and max values fit in the given size.
void	mergeStatisticsMinMax(Statistics stats) Abstract method to merge this statistics min and max with the values of the parameter object.
void	setMinMax(double min, double max)
void	setMinMaxFromBytes(byte[] minBytes, byte[] maxBytes) Abstract method to set min and max values from byte arrays.
void	updateStats(double value) updates statistics min and max using the passed value
void	updateStats(double min_value, double max_value)

Methods inherited from class org.apache.parquet.column.statistics.Statistics

comparator, compareMaxToValue, compareMinToValue, createStats, equals, getBuilderForReading, getNumNulls, getStatsBasedOnType, hashCode, hasNonNullValue, incrementNumNulls, incrementNumNulls, isEmpty, isNumNullsSet, markAsNotEmpty, maxAsString, mergeStatistics, minAsString, noopStats, setNumNulls, toString, type, updateStats, updateStats, updateStats, updateStats, updateStats

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleStatistics

@Deprecated
public DoubleStatistics()

Deprecated. will be removed in 2.0.0. Use Statistics.createStats(org.apache.parquet.schema.Type) instead

Method Detail

updateStats

public void updateStats(double value)

Description copied from class: Statistics

updates statistics min and max using the passed value

Overrides:

updateStats in class Statistics<Double>

Parameters:

value - value to use to update min and max

mergeStatisticsMinMax

public void mergeStatisticsMinMax(Statistics stats)

Description copied from class: Statistics

Abstract method to merge this statistics min and max with the values of the parameter object. Does not do any checks, only called internally.

Specified by:

mergeStatisticsMinMax in class Statistics<Double>

Parameters:

stats - Statistics object to merge with

setMinMaxFromBytes

public void setMinMaxFromBytes(byte[] minBytes,
                               byte[] maxBytes)

Description copied from class: Statistics

Abstract method to set min and max values from byte arrays.

Specified by:

setMinMaxFromBytes in class Statistics<Double>

Parameters:

minBytes - byte array to set the min value to

maxBytes - byte array to set the max value to

getMaxBytes

public byte[] getMaxBytes()

Description copied from class: Statistics

Abstract method to return the max value as a byte array

Specified by:

getMaxBytes in class Statistics<Double>

Returns:

byte array corresponding to the max value

getMinBytes

public byte[] getMinBytes()

Description copied from class: Statistics

Abstract method to return the min value as a byte array

Specified by:

getMinBytes in class Statistics<Double>

Returns:

byte array corresponding to the min value

isSmallerThan

public boolean isSmallerThan(long size)

Description copied from class: Statistics

Abstract method to return whether the min and max values fit in the given size.

Specified by:

isSmallerThan in class Statistics<Double>

Parameters:

size - a size in bytes

Returns:

true iff the min and max values are less than size bytes

updateStats

public void updateStats(double min_value,
                        double max_value)

initializeStats

public void initializeStats(double min_value,
                            double max_value)

genericGetMin

public Double genericGetMin()

Description copied from class: Statistics

Returns the min value in the statistics. The java natural order of the returned type defined by Comparable.compareTo(Object) might not be the proper one. For example, UINT_32 requires unsigned comparison instead of the natural signed one. Use Statistics.compareMinToValue(Comparable) or the comparator returned by Statistics.comparator() to always get the proper ordering.

Specified by:

genericGetMin in class Statistics<Double>

Returns:

the min value

genericGetMax

public Double genericGetMax()

Description copied from class: Statistics

Returns the max value in the statistics. The java natural order of the returned type defined by Comparable.compareTo(Object) might not be the proper one. For example, UINT_32 requires unsigned comparison instead of the natural signed one. Use Statistics.compareMaxToValue(Comparable) or the comparator returned by Statistics.comparator() to always get the proper ordering.

Specified by:

genericGetMax in class Statistics<Double>

Returns:

the max value

compareMinToValue

public int compareMinToValue(double value)

compareMaxToValue

public int compareMaxToValue(double value)

getMax

public double getMax()

getMin

public double getMin()

setMinMax

public void setMinMax(double min,
                      double max)

copy

public DoubleStatistics copy()

Specified by:

copy in class Statistics<Double>

Returns:

a new independent statistics instance of this class.