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Nepxion Discovery is a solution for Spring Cloud with blue green, gray, weight, limitation, circuit breaker, degrade, isolation, monitor, tracing, dye, failover, async agent

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package com.nepxion.discovery.common.util;

/**
 * Title: Nepxion Aquarius
 * Description: Nepxion Aquarius
 * Copyright: Copyright (c) 2017-2050
 * Company: Nepxion
 * @author Haojun Ren
 * @version 1.0
 */

import org.apache.commons.lang3.StringUtils;

public class MathsUtil {
    private static final char ASTERISK = '*';

    public static Long calculate(String value) {
        if (StringUtils.isEmpty(value)) {
            return null;
        }

        long result = 1;
        try {
            String[] array = StringUtils.split(value, ASTERISK);
            for (String data : array) {
                result *= Long.parseLong(data.trim());
            }
        } catch (NumberFormatException e) {
            return null;
        }

        return result;
    }
}