tech.tablesaw.aggregate

Class AggregateFunction<INCOL extends Column<?>,OUT>

java.lang.Object

tech.tablesaw.aggregate.AggregateFunction<INCOL,OUT>

Direct Known Subclasses:

BooleanAggregateFunction, DateAggregateFunction, DateTimeAggregateFunction, InstantAggregateFunction, NumericAggregateFunction, StringFunction, TimeAggregateFunction

public abstract class AggregateFunction<INCOL extends Column<?>,OUT>
extends Object

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

Constructor Summary

Constructors

Constructor and Description
AggregateFunction(String functionName)

Method Summary

Modifier and Type	Method and Description
String	functionName()
abstract boolean	isCompatibleColumn(ColumnType type)
abstract ColumnType	returnType()
abstract OUT	summarize(INCOL 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 OUT summarize(INCOL column)

toString

public String toString()

Overrides:

toString in class Object

isCompatibleColumn

public abstract boolean isCompatibleColumn(ColumnType type)

returnType

public abstract ColumnType returnType()