org.apache.poi.ss.formula.functions

Class DStarRunner

java.lang.Object

org.apache.poi.ss.formula.functions.DStarRunner

All Implemented Interfaces:

Function, Function3Arg

public final class DStarRunner
extends java.lang.Object
implements Function3Arg

This class performs a D* calculation. It takes an IDStarAlgorithm object and uses it for calculating the result value. Iterating a database and checking the entries against the set of conditions is done here. TODO: - wildcards ? and * in string conditions - functions as conditions

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DStarRunner.DStarAlgorithmEnum

Constructor Summary

Constructors

Constructor and Description
DStarRunner(DStarRunner.DStarAlgorithmEnum algorithm)

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(int srcRowIndex, int srcColumnIndex, ValueEval database, ValueEval filterColumn, ValueEval conditionDatabase) see Function.evaluate(ValueEval[], int, int)
ValueEval	evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)

Methods inherited from class java.lang.Object

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

Constructor Detail

DStarRunner

public DStarRunner(DStarRunner.DStarAlgorithmEnum algorithm)

Method Detail

evaluate

public final ValueEval evaluate(ValueEval[] args,
                                int srcRowIndex,
                                int srcColumnIndex)

Specified by:

evaluate in interface Function

Parameters:

args - the evaluated function arguments. Empty values are represented with BlankEval or MissingArgEval, never null.

srcRowIndex - row index of the cell containing the formula under evaluation

srcColumnIndex - column index of the cell containing the formula under evaluation

Returns:

The evaluated result, possibly an ErrorEval, never null. Note - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to Double.NaN be sure to translate the result to ErrorEval.NUM_ERROR.

evaluate

public ValueEval evaluate(int srcRowIndex,
                          int srcColumnIndex,
                          ValueEval database,
                          ValueEval filterColumn,
                          ValueEval conditionDatabase)

Description copied from interface: Function3Arg

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

Specified by:

evaluate in interface Function3Arg