private boolean checkValue()

in poi/src/main/java/org/apache/poi/ss/formula/EvaluationConditionalFormatRule.java [346:385]
35 lines of code
30 McCabe index (conditional complexity)

    private boolean checkValue(Cell cell, CellRangeAddress region) {
        if (cell == null || DataValidationEvaluator.isType(cell, CellType.BLANK)
           || DataValidationEvaluator.isType(cell,CellType.ERROR)
           || (DataValidationEvaluator.isType(cell,CellType.STRING)
                   && (cell.getStringCellValue() == null || cell.getStringCellValue().isEmpty())
               )
           ) {
            return false;
        }

        ValueEval eval = unwrapEval(workbookEvaluator.evaluate(rule.getFormula1(), ConditionalFormattingEvaluator.getRef(cell), region));

        String f2 = rule.getFormula2();
        ValueEval eval2 = BlankEval.instance;
        if (f2 != null && f2.length() > 0) {
            eval2 = unwrapEval(workbookEvaluator.evaluate(f2, ConditionalFormattingEvaluator.getRef(cell), region));
        }

        // we assume the cell has been evaluated, and the current formula value stored
        if (DataValidationEvaluator.isType(cell, CellType.BOOLEAN)
                && (eval == BlankEval.instance || eval instanceof BoolEval)
                && (eval2 == BlankEval.instance || eval2 instanceof BoolEval)
           ) {
            return operator.isValid(cell.getBooleanCellValue(), eval == BlankEval.instance ? null : ((BoolEval) eval).getBooleanValue(), eval2 == BlankEval.instance ? null : ((BoolEval) eval2).getBooleanValue());
        }
        if (DataValidationEvaluator.isType(cell, CellType.NUMERIC)
                && (eval == BlankEval.instance || eval instanceof NumberEval )
                && (eval2 == BlankEval.instance || eval2 instanceof NumberEval)
           ) {
            return operator.isValid(cell.getNumericCellValue(), eval == BlankEval.instance ? null : ((NumberEval) eval).getNumberValue(), eval2 == BlankEval.instance ? null : ((NumberEval) eval2).getNumberValue());
        }
        if (DataValidationEvaluator.isType(cell, CellType.STRING)
                && (eval == BlankEval.instance || eval instanceof StringEval )
                && (eval2 == BlankEval.instance || eval2 instanceof StringEval)
           ) {
                return operator.isValid(cell.getStringCellValue(), eval == BlankEval.instance ? null : ((StringEval) eval).getStringValue(), eval2 == BlankEval.instance ? null : ((StringEval) eval2).getStringValue());
        }

        return operator.isValidForIncompatibleTypes();
    }