Parses a time period into a long. Translates possible [msec|sec|min|h] suffixes : Date Parser « Data Type « Java

1. Java
2. Data Type
3. Date Parser

Parses a time period into a long. Translates possible [msec|sec|min|h] suffixes

     
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Map;


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  * Copyright 2005, JBoss Inc., and individual contributors as indicated
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2.1 of
  * the License, or (at your option) any later version.
  *
  * This software is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this software; if not, write to the Free
  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
  */



public class Main{

  /** Millisecond conversion constants */
  private static final long MSEC = 1;
  private static final long SECS = 1000;
  private static final long MINS = 60 * 1000;
  private static final long HOUR = 60 * 60 * 1000;
  /**
   * Parses a time period into a long.
   *
   * Translates possible [msec|sec|min|h] suffixes
   *
   * For example:
   *   "1"      ->  1 (msec)
   *   "1msec   ->  1 (msec)
   *   "1sec"   ->  1000 (msecs)
   *   "1min"   ->  60000 (msecs)
   *   "1h"     ->  3600000 (msecs)
   * 
   * Accepts negative periods, e.g. "-1"
   * 
   * @param period the stringfied time period
   * @return the parsed time period as long
   * @throws NumberFormatException
   */
  public static long parseTimePeriod(String period)
  {
     try
     {
        String s = period.toLowerCase();
        long factor;
        
        // look for suffix
        if (s.endsWith("msec"))
        {
           s = s.substring(0, s.lastIndexOf("msec"));
           factor = MSEC;
        }
        else if (s.endsWith("sec"))
        {
           s = s.substring(0, s.lastIndexOf("sec"));
           factor = SECS;
        }
        else if (s.endsWith("min"))
        {
           s = s.substring(0, s.lastIndexOf("min"));
           factor = MINS;
        }
        else if (s.endsWith("h"))
        {
           s = s.substring(0, s.lastIndexOf("h"));
           factor = HOUR;
        }
        else
        {
           factor = 1;
        }  
        return Long.parseLong(s) * factor;
     }
     catch (RuntimeException e)
     {
        // thrown in addition when period is 'null'
        throw new NumberFormatException("For input time period: '" + period + "'");
     }
  }
  
  /**
   * Same like parseTimePeriod(), but guards for negative entries.
   * 
   * @param period the stringfied time period
   * @return the parsed time period as long
   * @throws NumberFormatException
   */
  public static long parsePositiveTimePeriod(String period)
  {
     long retval = parseTimePeriod(period);
     if (retval < 0)
     {
        throw new NumberFormatException("Negative input time period: '" + period + "'");
     }
     return retval;
  }


}

   
    
    
    
    
  

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