Top Description Fields Constructors Methods
org.apache.poi.ss.formula.functions

public Class FactDouble

extends Fixed1ArgFunction
implements FreeRefFunction
Class Inheritance
All Implemented Interfaces
org.apache.poi.ss.formula.functions.FreeRefFunction
Imports
org.apache.poi.ss.formula.OperationEvaluationContext, org.apache.poi.ss.formula.eval.*, java.math.BigInteger, java.util.HashMap
Implementation for Excel FACTDOUBLE() function.

Syntax:
FACTDOUBLE (number)

Returns the double factorial of a number.

Number is the value for which to return the double factorial. If number is not an integer, it is truncated.

Remarks

Use a cache for more speed of previously calculated factorial

Field Summary

Modifier and TypeField and Description
pack-priv static HashMap<Integer, BigInteger>
cache

public static final FreeRefFunction
instance

Constructor Summary

AccessConstructor and Description
public
FactDouble()

Method Summary

Modifier and TypeMethod and Description
public ValueEval
evaluate(int srcRowIndex, int srcColumnIndex, ValueEval numberVE)

Implements org.apache.poi.ss.formula.functions.Function1Arg.evaluate.

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

public ValueEval
evaluate(ValueEval[]
the pre-evaluated arguments for this function. args is never null, nor are any of its elements.
args, OperationEvaluationContext
primarily used to identify the source cell containing the formula being evaluated. may also be used to dynamically create reference evals.
ec)

Implements org.apache.poi.ss.formula.functions.FreeRefFunction.evaluate.

public static BigInteger
factorial(int n)

Inherited from org.apache.poi.ss.formula.functions.Fixed1ArgFunction:
evaluate

Field Detail

cacheback to summary
pack-priv static HashMap<Integer, BigInteger> cache
instanceback to summary
public static final FreeRefFunction instance

Constructor Detail

FactDoubleback to summary
public FactDouble()

Method Detail

evaluateback to summary
public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval numberVE)

Implements org.apache.poi.ss.formula.functions.Function1Arg.evaluate.

Doc from org.apache.poi.ss.formula.functions.Function1Arg.evaluate.

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

Annotations
@Override
evaluateback to summary
public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec)

Implements org.apache.poi.ss.formula.functions.FreeRefFunction.evaluate.

Parameters
args:ValueEval[]

Doc from org.apache.poi.ss.formula.functions.FreeRefFunction.evaluate.

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

ec:OperationEvaluationContext

Doc from org.apache.poi.ss.formula.functions.FreeRefFunction.evaluate.

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

Returns:ValueEval

Doc from org.apache.poi.ss.formula.functions.FreeRefFunction.evaluate.

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

Annotations
@Override
factorialback to summary
public static BigInteger factorial(int n)