DateTimeRange.java :  » Groupware » hipergate » org » jical » Java Open Source

/*
 * Created on 31-Oct-2004
 *
 * Purpose is to get the date time range to use for a jical calc.
 */
package org.jical;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Logger;

/**
 * @author sfg
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class DateTimeRange {
  Date dateFrom;
  Date dateTo;
  private static final SimpleDateFormat DATEONLY = new SimpleDateFormat("yyyyMMdd");
  private static final SimpleDateFormat DATETIME = new SimpleDateFormat("yyyyMMddHHmmss");
  private static String CURRENT  = "CURRENT";

  private Logger logger = Logger.getLogger(this.getClass().getName());
    /*
     * TODO Work out dateFrom dateTo and timeRange.
     * 
     */
    public void calcDateTimeRange(String dateRangeOrDaysForward, String timeRange)
    {
      dateFrom = null;
        dateTo   = null; 
        
        // Allow CURRENT to fetch all calendar details up to today. 
        if (dateRangeOrDaysForward.equalsIgnoreCase(CURRENT))
        {
          dateFrom = new Date(1);
          dateTo   = new Date();
        }
        else
          // Check for a range
          if (dateRangeOrDaysForward.indexOf("-") != -1)
          {
            try
        {
              dateFrom = getDateFrom(dateRangeOrDaysForward);
              dateFrom = getDateTo(dateRangeOrDaysForward);
        }
            catch (Exception e)
        {
              logger.severe("Cannot read your datefrom/to parameter! RTFM. 14chars - 14 chars, exception:"+e);
              dateFrom = null;
              dateTo = null;
        }
            
          }
      else  // Assume a 'days forward'.
      {
         long daysForward = getDaysForwardNumeric(dateRangeOrDaysForward);
           calcDateRangeFromDaysForward(daysForward);
      }
    }
    
    public long getDaysForwardNumeric(String dateRangeOrDaysForward)
    {
        try 
        {
            return java.lang.Integer.parseInt(dateRangeOrDaysForward);
        }
        catch (Exception e)
        {
          e.printStackTrace();
            logger.severe("Really bad days forward parameter of "+dateRangeOrDaysForward+" caused exception: "+e);
            // Allow proceed but with zero days forward.
            return 0;
        }
        
    }
    private void calcDateRangeFromDaysForward(long daysForward)
    {
      Date dateFrom = new Date();
      Date dateTo = getDateToFromDaysForward(daysForward);
      /*
       * Currently, keep this dateFrom/To as coarse. ie, dateFrom/To are DAYS not DAY/HH:MM
       * ie for FROM date, set to time of 0000, for TO date set to time of 235959
       */
      try
      {
          dateFrom = (Date)DATEONLY.parse(DATEONLY.format(dateFrom));
          dateTo   = (Date)DATETIME.parse(DATEONLY.format(dateTo) + "235959");
      }
      catch (Exception e)
      {
          logger.severe("Error setting dates to process full day range." + e);
      }
    }
    public Date getDateToFromDaysForward(long daysForward)
    {
        Date dateTo = new Date();
        long rollMicroSecs = 86400000 * daysForward;
        dateTo.setTime(dateTo.getTime() + (rollMicroSecs));
        return dateTo;
    }
    /*
     * This is not the optimal place for this but it works!
     * 
     */
    public Date getDateFrom(String dateRangeOrDaysForward) throws Exception
    {
        try 
        {
            return (Date)DATETIME.parse(dateRangeOrDaysForward.substring(0,14));
        }
        catch (Exception e)
        {
            throw e;
        }
    }
    public Date getDateTo(String dateRangeOrDaysForward)  throws Exception
    {
        // Gets the From Date
        try 
        {
            return (Date)DATETIME.parse(dateRangeOrDaysForward.substring(15));
        }
        catch (Exception e)
        {
            throw e;
        }
    }
}