// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.typeconverter.impl;
import jodd.datetime.JDateTime;
import jodd.typeconverter.TypeConversionException;
import jodd.typeconverter.TypeConverter;
import jodd.util.StringUtil;
import java.util.Calendar;
import java.util.Date;
/**
* Converts given object to <code>Byte</code>.
* Conversion rules:
* <ul>
* <li><code>null</code> value is returned as <code>null</code></li>
* <li>object of destination type is simply casted</li>
* <li><code>Date</code> object is converted</li>
* <li><code>JDateTime</code> object is converted</li>
* <li><code>Number</code> is used as number of milliseconds</li>
* <li>finally, if string value contains only numbers it is parsed as milliseconds;
* otherwise as JDateTime pattern</li>
* </ul>
*/
public class CalendarConverter implements TypeConverter<Calendar> {
public Calendar convert(Object value) {
if (value == null) {
return null;
}
if (value instanceof Calendar) {
return (Calendar) value;
}
if (value instanceof Date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime((Date) value);
return calendar;
}
if (value instanceof JDateTime) {
return ((JDateTime)value).convertToCalendar();
}
if (value instanceof Number) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(((Number) value).longValue());
return calendar;
}
String stringValue = value.toString().trim();
if (StringUtil.containsOnlyDigits(stringValue) == false) {
// try to parse default string format
JDateTime jdt = new JDateTime(stringValue, JDateTime.DEFAULT_FORMAT);
return jdt.convertToCalendar();
}
try {
long milliseconds = Long.parseLong(stringValue);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(milliseconds);
return calendar;
} catch (NumberFormatException nfex) {
throw new TypeConversionException(value, nfex);
}
}
}