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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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.
*/
package org.databene.commons.converter;
import java.util.Date;
import java.util.TimeZone;
import org.databene.commons.ConversionException;
/**
* Interprets a Date as duration specification, e.g. '0000-00-00T00:00:00.001' as one millisecond,
* '0001-00-00T00:00:00.000' as one year. Dates after 1970-01-01 will be interpreted relative to that date.
*
* Created at 11.01.2009 06:39:28
* @since 0.5.7
* @author Volker Bergmann
*/
public class Date2DurationConverter extends ThreadSafeConverter {
public Date2DurationConverter() {
super(Date.class, Long.class);
}
@Override
public Long convert(Date sourceValue) throws ConversionException {
if (sourceValue == null)
return null;
long source = sourceValue.getTime();
// for time zone problems, see http://mail-archives.apache.org/mod_mbox/struts-user/200502.mbox/%[email protected]%3E
Long result = source + TimeZone.getDefault().getOffset(0L); // That's relative to 1970-01-01
if (result < 0) // if it's before 1970-01-01, interpret it relative to 0001-01-01
result = source + TimeZone.getDefault().getOffset(-62170156800000L) + 62170156800000L;
return result;
}
}