Package tech.tablesaw.aggregate

Class DateTimeAggregateFunction

java.lang.Object

tech.tablesaw.aggregate.AggregateFunction<DateTimeColumn,LocalDateTime>

tech.tablesaw.aggregate.DateTimeAggregateFunction

public abstract class DateTimeAggregateFunction
extends AggregateFunction<DateTimeColumn,LocalDateTime>

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

Constructor Summary

Constructors

Constructor	Description
DateTimeAggregateFunction(String name)	Constructs an DateTimeAggregateFunction 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 LocalDateTime	summarize(DateTimeColumn column)	Returns an LocalDateTime 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

DateTimeAggregateFunction

public DateTimeAggregateFunction(String name)

Constructs an DateTimeAggregateFunction with the given name. The name is used as a column name in the output

Method Details

summarize

public abstract LocalDateTime summarize(DateTimeColumn column)

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

Specified by:

summarize in class AggregateFunction<DateTimeColumn,LocalDateTime>

isCompatibleColumn

public boolean isCompatibleColumn(ColumnType type)

Returns true if the given ColumnType is compatible with this function

Specified by:

isCompatibleColumn in class AggregateFunction<DateTimeColumn,LocalDateTime>

returnType

public ColumnType returnType()

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

Specified by:

returnType in class AggregateFunction<DateTimeColumn,LocalDateTime>