Package net.jqwik.api.statistics

Class Histogram

java.lang.Object

net.jqwik.api.statistics.Histogram

All Implemented Interfaces:

StatisticsReportFormat

Direct Known Subclasses:

NumberRangeHistogram

@API(status=EXPERIMENTAL,
     since="1.3.0")
public class Histogram
extends java.lang.Object
implements StatisticsReportFormat

A statistics report format to display collected statistics entries as a histogram

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Histogram.Bucket

Constructor Summary

Constructors

Constructor	Description
Histogram()

Method Summary

Modifier and Type	Method	Description
protected java.util.List<Histogram.Bucket>	cluster(java.util.List<StatisticsEntry> entries)	Cluster entries into buckets.
protected java.util.Comparator<? super StatisticsEntry>	comparator()	Determine how entries are being sorted from top to bottom.
java.util.List<java.lang.String>	formatReport(java.util.List<StatisticsEntry> entries)	Return a list of report lines.
protected java.lang.String	label(StatisticsEntry entry)	Determine how entries are being labelled in the histogram.
protected int	maxDrawRange()	Determine how many block characters are maximally used to draw the distribution.

Methods inherited from class java.lang.Object

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

Constructor Detail

Histogram

public Histogram()

Method Detail

formatReport

public java.util.List<java.lang.String> formatReport(java.util.List<StatisticsEntry> entries)

Description copied from interface: StatisticsReportFormat

Return a list of report lines. Often, one line will represent one entry but that must not necessarily be the case.

Specified by:

formatReport in interface StatisticsReportFormat

Returns:

All report lines. No trailing `CR` or `LF` characters are needed.

See Also:

StatisticsEntry

maxDrawRange

protected int maxDrawRange()

Determine how many block characters are maximally used to draw the distribution. The more you have the further the histogram extends to the right.

Can be overridden.

Returns:

A positive number. Default is 80.

comparator

protected java.util.Comparator<? super StatisticsEntry> comparator()

Determine how entries are being sorted from top to bottom.

Can be overridden.

Returns:

A comparator instance.

label

protected java.lang.String label(StatisticsEntry entry)

Determine how entries are being labelled in the histogram.

Can be overridden.

Parameters:

entry -

Returns:

A non-null string

cluster

protected java.util.List<Histogram.Bucket> cluster(java.util.List<StatisticsEntry> entries)

Cluster entries into buckets.

Override if entries should be aggregated into buckets to display in histogram.

Parameters:

entries - An already sorted list of entries

Returns:

A sorted list of buckets