NormSInv.java

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   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
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package org.apache.poi.ss.formula.functions;

import org.apache.poi.ss.formula.OperationEvaluationContext;
import org.apache.poi.ss.formula.eval.ErrorEval;
import org.apache.poi.ss.formula.eval.EvaluationException;
import org.apache.poi.ss.formula.eval.NumberEval;
import org.apache.poi.ss.formula.eval.OperandResolver;
import org.apache.poi.ss.formula.eval.ValueEval;

/**
 * Implementation for Excel NORMSINV() and NORM.S.INV() functions.
 * <ul>
 *   <li>https://support.microsoft.com/en-us/office/normsinv-function-8d1bce66-8e4d-4f3b-967c-30eed61f019d</li>
 *   <li>https://support.microsoft.com/en-us/office/norm-s-inv-function-d6d556b4-ab7f-49cd-b526-5a20918452b1</li>
 * </ul>
 */
public final class NormSInv extends Fixed1ArgFunction implements FreeRefFunction {

    public static final NormSInv instance = new NormSInv();

    private NormSInv() {}

    @Override
    public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg1) {
        try {
            Double probability = evaluateValue(arg1, srcRowIndex, srcColumnIndex);
            if (probability == null) {
                return ErrorEval.VALUE_INVALID;
            } else if (probability <= 0 || probability >= 1) {
                return ErrorEval.NUM_ERROR;
            }

            return new NumberEval(NormInv.inverse(probability.doubleValue(), 0, 1));
        } catch (EvaluationException e) {
            return e.getErrorEval();
        }
    }

    @Override
    public ValueEval evaluate(ValueEval[] args, OperationEvaluationContext ec) {
        if (args.length == 1) {
            return evaluate(ec.getRowIndex(), ec.getColumnIndex(), args[0]);
        }

        return ErrorEval.VALUE_INVALID;
    }

    private static Double evaluateValue(ValueEval arg, int srcRowIndex, int srcColumnIndex) throws EvaluationException {
        ValueEval veText = OperandResolver.getSingleValue(arg, srcRowIndex, srcColumnIndex);
        String strText1 = OperandResolver.coerceValueToString(veText);
        return OperandResolver.parseDouble(strText1);
    }
}