IDStarAlgorithm (Keikai Spreadsheet Build 6.0.0 API)

All Known Implementing Classes:

DAverage, DCount, DCountA, DGet, DMax, DMin, DProduct, DStdev, DStdevp, DSum, DVar, DVarp
```
public interface IDStarAlgorithm
```
Interface specifying how an algorithm to be used by DStarRunner should look like. Each implementing class should correspond to one of the D* functions.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`allowEmptyMatchField()`	Whether the field value (the 2nd param in DCOUNT, DGET, etc.) can evaluate to empty.
`ValueEval`	`getResult()`	Return a result ValueEval that will be the result of the calculation.
`boolean`	`processMatch(ValueEval eval)`	Process a match that is found during a run through a database.

- Method Detail
  - processMatch
```
boolean processMatch(ValueEval eval)
```
    Process a match that is found during a run through a database.
    
    Parameters:
    
    eval - ValueEval of the cell in the matching row. References will already be resolved.
    
    Returns:
    
    Whether we should continue iterating through the database.
  - getResult
```
ValueEval getResult()
```
    Return a result ValueEval that will be the result of the calculation. This is always called at the end of a run through the database.
    
    Returns:
    
    a ValueEval
  - allowEmptyMatchField
```
default boolean allowEmptyMatchField()
```
    Whether the field value (the 2nd param in DCOUNT, DGET, etc.) can evaluate to empty. It is allowed to evaluate to empty for DCOUNT.
    
    Returns:
    
    whether the field value can evaluate to empty