Package tech.tablesaw.aggregate

Class AggregateFunction<T,C extends Column>

java.lang.Object

tech.tablesaw.aggregate.AggregateFunction<T,C>

Direct Known Subclasses:

BooleanAggregateFunction, DateAggregateFunction, DateTimeAggregateFunction, NumericAggregateFunction, StringFunction, TimeAggregateFunction

public abstract class AggregateFunction<T,C extends Column>
extends Object

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

Constructor Summary

Constructors

Constructor	Description
AggregateFunction(String functionName)

Method Summary

Modifier and Type	Method	Description
String	functionName()
abstract boolean	isCompatableColumn(ColumnType type)
abstract ColumnType	returnType()
abstract T	summarize(C column)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregateFunction

public AggregateFunction(String functionName)

Method Detail

functionName

public String functionName()

summarize

public abstract T summarize(C column)

toString

public String toString()

Overrides:

toString in class Object

isCompatableColumn

public abstract boolean isCompatableColumn(ColumnType type)

returnType

public abstract ColumnType returnType()