DateAggregateFunction (tablesaw-core 0.44.1 API)

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
Constructor Description

DateAggregateFunction(String name)
Constructs a DateAggregateFunction with the given name.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
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 Detail
  - DateAggregateFunction
```
public 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 Detail
  - 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>