FreeRefFunction (The Adobe Experience Manager SDK 2022.11.9850.20221116T162329Z-220900)

All Known Implementing Classes:

Bin2Dec, Complex, Countifs, Dec2Bin, Dec2Hex, Delta, EDate, EOMonth, FactDouble, Hex2Dec, Imaginary, ImReal, Indirect, Oct2Dec, Quotient, Sumifs, WeekNum
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public interface FreeRefFunction
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For most Excel functions, involving references ((cell, area), (2d, 3d)), the references are passed in as arguments, and the exact location remains fixed. However, a select few Excel functions have the ability to access cells that were not part of any reference passed as an argument.
Two important functions with this feature are INDIRECT and OFFSET
When POI evaluates formulas, each reference argument is capable of evaluating any cell inside its range. Actually, even cells outside the reference range but on the same sheet can be evaluated. This allows OFFSET to be implemented like most other functions - taking only the arguments, and source cell coordinates. For the moment this interface only exists to serve the INDIRECT which can decode arbitrary text into cell references, and evaluate them..

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec)

- Method Detail
  - evaluate
```
ValueEval evaluate(ValueEval[] args,
                   OperationEvaluationContext ec)
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    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).