org.apache.poi.ss.formula.functions

Class Days

java.lang.Object

org.apache.poi.ss.formula.functions.Days

All Implemented Interfaces:

FreeRefFunction

public class Days
extends Object
implements FreeRefFunction

Calculates the number of days between two dates based on a real year, which is used in some accounting calculations.

DAYS(end_date,start_date)

• Start_date, end_date (required):
  The two dates between which you want to know the number of days.
  If start_date occurs after end_date, the DAYS function returns a negative number.

See Also:

DAYS function - Microsoft Office

Field Summary

Fields

Modifier and Type	Field and Description
static Days	instance

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(ValueEval[] args, OperationEvaluationContext ec)

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static final Days instance

Method Detail

evaluate

public ValueEval evaluate(ValueEval[] args,
                          OperationEvaluationContext ec)

Specified by:

evaluate in interface FreeRefFunction

Parameters:

args - the pre-evaluated arguments for this function. args is never null, nor are any of its elements.

ec - primarily used to identify the source cell containing the formula being evaluated. may also be used to dynamically create reference evals.

Returns:

never null. Possibly an instance of ErrorEval in the case of a specified Excel error (Exceptions are never thrown to represent Excel errors).