org.apache.poi.ss.formula.atp.Ifs Maven / Gradle / Ivy
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package org.apache.poi.ss.formula.atp;
import org.apache.poi.ss.formula.OperationEvaluationContext;
import org.apache.poi.ss.formula.eval.BoolEval;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.eval.ValueEval;
import org.apache.poi.ss.formula.functions.FreeRefFunction;
/**
* Implementation of 'Analysis Toolpak' Excel function IFS()
*
* The IFS function checks whether one or more conditions are met and returns a value that corresponds to the first TRUE condition.
* IFS can take the place of multiple nested IF statements, and is much easier to read with multiple conditions.
*
* Syntax
* IFS(IFS([Something is True1, Value if True1, [Something is True2, Value if True2],…[Something is True127, Value if True127]))
*
* @author Pieter Degraeuwe
*/
final class Ifs implements FreeRefFunction {
public static final FreeRefFunction instance = new Ifs();
private Ifs() {
// enforce singleton
}
public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
if (args.length % 2 != 0) {
return ErrorEval.VALUE_INVALID;
}
for (int i = 0; i < args.length; i = i + 2) {
BoolEval logicalTest = (BoolEval) args[i];
if (logicalTest.getBooleanValue()) {
return args[i + 1];
}
}
return ErrorEval.NA;
}
}