io.cdap.wrangler.statistics

Class ColumnMetric

java.lang.Object

io.cdap.wrangler.statistics.ColumnMetric

public final class ColumnMetric
extends Object

This class stores and manages Measurements for each column.

Constructor Summary

Constructors

Constructor and Description
ColumnMetric()

Method Summary

Modifier and Type	Method and Description
Set<String>	getColumns()
void	increment(String column, String measure) Increments a measure counter for a column.
List<Pair<String,Double>>	percentage(String column, Double sum) Computes percentages for each measure for a given column.
void	set(String column, String measure, double value) Sets the measure value for a column.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnMetric

public ColumnMetric()

Method Detail

increment

public void increment(String column,
                      String measure)

Increments a measure counter for a column.

Parameters:

column - name of the column

measure - to be incremented for a column.

set

public void set(String column,
                String measure,
                double value)

Sets the measure value for a column.

Parameters:

column - name of the column.

measure - name of the measure that needs to be set for the column.

value - to be set for the measure.

getColumns

public Set<String> getColumns()

Returns:

Set of columns tracked.

percentage

public List<Pair<String,Double>> percentage(String column,
                                            Double sum)

Computes percentages for each measure for a given column.

Parameters:

column - name of the column.

sum - denonminator for calculating percentages.

Returns:

List of measures and their respective percentages.