org.apache.poi.ss.formula.functions

Class WeekNum

java.lang.Object

org.apache.poi.ss.formula.functions.Fixed2ArgFunction

org.apache.poi.ss.formula.functions.WeekNum

All Implemented Interfaces:

FreeRefFunction, Function, Function2Arg

public class WeekNum
extends Fixed2ArgFunction
implements FreeRefFunction

Implementation for Excel WeekNum() function.

Syntax:
WeekNum (Serial_num,Return_type)

Returns a number that indicates where the week falls numerically within a year.

Serial_num is a date within the week. Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd day of May, 2008. Problems can occur if dates are entered as text. Return_type is a number that determines on which day the week begins. The default is 1. 1 Week begins on Sunday. Weekdays are numbered 1 through 7. 2 Week begins on Monday. Weekdays are numbered 1 through 7.

Field Summary

Fields

Modifier and Type	Field and Description
static FreeRefFunction	instance

Constructor Summary

Constructors

Constructor and Description
WeekNum()

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(int srcRowIndex, int srcColumnIndex, ValueEval serialNumVE, ValueEval returnTypeVE) see Function.evaluate(ValueEval[], int, int)
ValueEval	evaluate(ValueEval[] args, OperationEvaluationContext ec)
int	getWeekNo(java.util.Calendar cal, int weekStartOn)

Methods inherited from class org.apache.poi.ss.formula.functions.Fixed2ArgFunction

evaluate

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static final FreeRefFunction instance

Constructor Detail

WeekNum

public WeekNum()

Method Detail

evaluate

public ValueEval evaluate(int srcRowIndex,
                          int srcColumnIndex,
                          ValueEval serialNumVE,
                          ValueEval returnTypeVE)

Description copied from interface: Function2Arg

see Function.evaluate(ValueEval[], int, int)

Specified by:

evaluate in interface Function2Arg

getWeekNo

public int getWeekNo(java.util.Calendar cal,
                     int weekStartOn)

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).