DateUtils.java

/*
   Copyright (C) 2005-2012, by the President and Fellows of Harvard College.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

         http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

   Dataverse Network - A web application to share, preserve and analyze research data.
   Developed at the Institute for Quantitative Social Science, Harvard University.
   Version 3.0.
*/
/*
 * DateUtils.java
 *
 * Created on Aug 1, 2007, 11:41:58 AM
 *
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package edu.harvard.iq.dvn.core.web.util;

import java.sql.Timestamp;
import java.util.Date;
import java.text.DateFormat;

/**
 *
 * @author wbossons
 */
public class DateUtils implements java.io.Serializable {

    public DateUtils() {
    }

    public static void main(String[] args) {
    }
    
    private static String timestamp = null;

    public static String getTimeStampString() {
        Date date = new Date();
        timestamp = DateFormat.getDateTimeInstance().format(date);
        return timestamp;
    }
    
    public static Timestamp getTimestamp() {
        Timestamp timeStamp   = null;
        Date date = new Date();
        timeStamp = new Timestamp(date.getTime());
        return timeStamp;
    }
    
    public static String getTimeInterval(Long startMilliseconds) {
        Long currentMilliseconds = System.currentTimeMillis();
        Long interval            = (currentMilliseconds - startMilliseconds);
        //System.out.println("currentMillis are " + currentMilliseconds + " and startMillis are " + startMilliseconds + " Time elapsed in minutes is : " + interval.toString() + " minutes");   
        Long uBoundMinutes = new Long(60 * 60);
        Long uBoundHours   = new Long(uBoundMinutes * 24);
        Long uBoundDays    = new Long(uBoundHours * 7);
        Long uBoundWeeks   = new Long(uBoundDays * 4);
        Long uBoundMonths  = new Long(uBoundWeeks * 12);
        interval           = interval/1000;
        if (interval > 0 && interval < 60)
            return interval + ((interval > 1) ? " seconds ago" : " second ago");
        else if (interval > 60 && interval < uBoundMinutes)
            return interval/(60) + ((interval > 1) ? " minutes ago" : " minute ago");
        else if (interval >= uBoundMinutes && interval < uBoundHours)
            return interval/uBoundMinutes + ((interval/uBoundMinutes > 1) ? " hours ago" : " hour ago");
        else if (interval >= uBoundHours && interval < uBoundDays)
            return interval/uBoundHours + ((interval/uBoundHours > 1) ? " days ago" : " day ago");
        else if (interval >= uBoundDays && interval < uBoundWeeks)
            return interval/uBoundDays + ((interval/uBoundDays > 1) ? " weeks ago" : " week ago");
        else if (interval >= uBoundWeeks && interval < uBoundMonths)
            return interval/uBoundWeeks + ((interval/uBoundWeeks > 1) ? " months ago" : " month ago");
        else if (interval >= uBoundMonths)
            return "More than a year ago";
        else 
            return "--";
        }

    public static String getLoadTime(Long startMilliseconds) {
        Long currentMilliseconds = System.currentTimeMillis();
        Long interval            = (currentMilliseconds - startMilliseconds);
        //System.out.println("currentMillis are " + currentMilliseconds + " and startMillis are " + startMilliseconds + " Time elapsed in minutes is : " + interval.toString() + " minutes");
        Long uBoundMinutes = new Long(60 * 60);
        Long uBoundHours   = new Long(uBoundMinutes * 24);
        Long uBoundDays    = new Long(uBoundHours * 7);
        Long uBoundWeeks   = new Long(uBoundDays * 4);
        Long uBoundMonths  = new Long(uBoundWeeks * 12);
        interval           = interval/1000;
        if (interval < 0)
            return "under a second";
        else if (interval > 0 && interval < 60)
            return interval + ((interval > 1) ? " seconds" : " second");
        else if (interval > 60 && interval < uBoundMinutes)
            return interval/(60) + ((interval > 1) ? " minutes" : " minute");
        else if (interval >= uBoundMinutes && interval < uBoundHours)
            return interval/uBoundMinutes + ((interval/uBoundMinutes > 1) ? " hours" : " hour");
        else if (interval >= uBoundHours && interval < uBoundDays)
            return interval/uBoundHours + ((interval/uBoundHours > 1) ? " days" : " day");
        else if (interval >= uBoundDays && interval < uBoundWeeks)
            return interval/uBoundDays + ((interval/uBoundDays > 1) ? " weeks" : " week");
        else if (interval >= uBoundWeeks && interval < uBoundMonths)
            return interval/uBoundWeeks + ((interval/uBoundWeeks > 1) ? " months" : " month");
        else if (interval >= uBoundMonths)
            return "More than a year";
        else
            return "under a second";
        }
}