Package tech.tablesaw.aggregate

Class DateAggregateFunction

java.lang.Object

tech.tablesaw.aggregate.AggregateFunction<DateColumn,LocalDate>

tech.tablesaw.aggregate.DateAggregateFunction

public abstract class DateAggregateFunction
extends AggregateFunction<DateColumn,LocalDate>

A partial implementation of aggregate functions to summarize over a date column

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DateAggregateFunction(String name)	Constructs a DateAggregateFunction with the given name.

Method Summary

Modifier and Type	Method	Description
boolean	isCompatibleColumn(ColumnType type)	Returns true if the given ColumnType is compatible with this function
ColumnType	returnType()	Returns the ColumnType to be used for the values returned by this function
abstract LocalDate	summarize(DateColumn column)	Returns an instance of LocalDate that is the result of applying this function to the given column

Methods inherited from class tech.tablesaw.aggregate.AggregateFunction

functionName, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DateAggregateFunction

protected DateAggregateFunction(String name)

Constructs a DateAggregateFunction with the given name. The name may be used to name a column in the output when this function is used by Summarizer

Method Details

summarize

public abstract LocalDate summarize(DateColumn column)

Returns an instance of LocalDate that is the result of applying this function to the given column

Specified by:

summarize in class AggregateFunction<DateColumn,LocalDate>

isCompatibleColumn

public boolean isCompatibleColumn(ColumnType type)

Returns true if the given ColumnType is compatible with this function

Specified by:

isCompatibleColumn in class AggregateFunction<DateColumn,LocalDate>

returnType

public ColumnType returnType()

Returns the ColumnType to be used for the values returned by this function

Specified by:

returnType in class AggregateFunction<DateColumn,LocalDate>