/*
* file: DurationUtility.java
* author: Jon Iles
* copyright: (c) Packwood Software 2005
* date: Jan 23, 2006
*/
/*
* This library 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 library 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 library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package net.sf.mpxj.mpx;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import net.sf.mpxj.Duration;
import net.sf.mpxj.MPXJException;
import net.sf.mpxj.TimeUnit;
/**
* This class contains method relating to managing Duration instances
* for MPX files.
*/
final class DurationUtility
{
/**
* Constructor.
*/
private DurationUtility()
{
// private constructor to prevent instantiation
}
/**
* Retrieve an Duration instance. Use shared objects to
* represent common values for memory efficiency.
*
* @param dur duration formatted as a string
* @param format number format
* @param locale target locale
* @return Duration instance
* @throws MPXJException
*/
public static Duration getInstance(String dur, NumberFormat format, Locale locale) throws MPXJException
{
try
{
int lastIndex = dur.length() - 1;
int index = lastIndex;
double duration;
TimeUnit units;
while ((index > 0) && (Character.isDigit(dur.charAt(index)) == false))
{
--index;
}
//
// If we have no units suffix, assume days to allow for MPX3
//
if (index == lastIndex)
{
duration = format.parse(dur).doubleValue();
units = TimeUnit.DAYS;
}
else
{
++index;
duration = format.parse(dur.substring(0, index)).doubleValue();
while ((index < lastIndex) && (Character.isWhitespace(dur.charAt(index))))
{
++index;
}
units = TimeUnitUtility.getInstance(dur.substring(index), locale);
}
return (Duration.getInstance(duration, units));
}
catch (ParseException ex)
{
throw new MPXJException("Failed to parse duration", ex);
}
}
}