NR-data/src/main/java/org/leolo/nrdatad/util/JSONUtil.java

package org.leolo.nrdatad.util;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class JSONUtil {

    static Logger log = LogManager.getLogger();

    public static int parseInt(String val){
        //Throw exception for empty string, or just a plus sign to maintenance backward
        //compatibility with previous version.
        if(val.length()==0 || "+".equals(val)){
            throw new NumberFormatException();
        }
        if (val.startsWith("+")) {
            return _parseInt(val.substring(1));
        }
        return _parseInt(val);
    }

    private static int _parseInt(String val) {
        if(val.length()==0){
            return 0;
        }
        if (val.startsWith("0")) {
            return _parseInt(val.substring(1));
        }
        return Integer.parseInt(val);
    }

}