ISOtoRbnbTime.java

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package org.nees.daq;

import java.util.*;

// Warning: timestamp not valid: 2004-07-22T13:41:15
public class ISOtoRbnbTime {
    public static boolean DEBUG = false;
    private int year;
    private int month;
    private int day;
    private int hour;
    private int min;
    private int sec;
    private int frac;
    private String ISOString;
    private double convertedTStamp;
    public boolean     is_valid;

    /*
     @brief Constructor, converts input to internal time
     @param ISOString ISO8601 timestamp, e.g. 2003-08-12T19:21:22.30095
    */
    public ISOtoRbnbTime(String ISOString)
    {
        is_valid = false;
        this.ISOString = ISOString;
        convert(ISOString);
    }
    
    private void convert(String ISOString) {

        StringTokenizer st = new StringTokenizer(ISOString, "-T:\t\n. ");
        try
        {
            year = Integer.parseInt(st.nextToken());
            month = Integer.parseInt(st.nextToken());
            day = Integer.parseInt(st.nextToken());
            hour = Integer.parseInt(st.nextToken());
            min = Integer.parseInt(st.nextToken());
            sec = Integer.parseInt(st.nextToken());
            is_valid = true;
        } catch (Exception ignore) {}
        
        // fractional part is optional; to accomidate alrernate format
        frac = 0;
        try
        {
            frac = Integer.parseInt(st.nextToken());
        } catch (Exception ignore) {}
        
        //System.out.println("String " + ISOString + ", Parsed into " + year + "." + month + "." + day + "." + hour + "." + min + "." + sec + "." + frac);
        if (year > 1900) year -= 1900;
        month -= 1;
        convertedTStamp = (double)(Date.UTC(year,month,day,hour,min,sec)/1000.0);
        convertedTStamp += (double)(frac/100000.0);
        if (DEBUG) debugPrint();
    }
    
    /*
     @brief Return pre-computed result
     @retval time RBNB-format timestamp, double, seconds since the epoc
    */
    public double getValue() {
        return(convertedTStamp);
    }
    
    public void debugPrint()
    {
        System.out.println("Debug print of ISOString " + ISOString);
        System.out.println("   Parsed into " + year + "." + month + "." + day + "." + hour + "." + min + "." + sec + "." + frac);
        System.out.println("   Converted timestamp = " + convertedTStamp);
        long milliseconds = (long) (convertedTStamp*1000.);
        Date date = new Date(milliseconds);
        java.text.SimpleDateFormat format = new 
                java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        System.out.println("   Confirm Date/Time: " + format.format(date) + "\n");      
    }
}

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