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/*
 * 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 org.databene.commons.ConversionException;

import java.util.Date;
import java.util.TimeZone;

/**
 * Converts a {@link Date} into the number of milliseconds since 1970-01-01 in a certain time zone and back.
 * By default it uses the system's default time zone.
 * Created: 05.08.2007 07:10:25
 * @author Volker Bergmann
 */
public class Date2LongConverter extends ThreadSafeConverter{

	private TimeZone timeZone;
	
	// construcors -----------------------------------------------------------------------------------------------------

	public Date2LongConverter() {
		this(TimeZone.getDefault());
	}

	public Date2LongConverter(TimeZone timeZone) {
		super(Date.class, Long.class);
		this.timeZone = timeZone;
	}
	
	// properties ------------------------------------------------------------------------------------------------------

	public TimeZone getTimeZone() {
		return timeZone;
	}

	public void setTimeZone(TimeZone timeZone) {
		this.timeZone = timeZone;
	}
	
	// BidirectionalConverter interface implementation -----------------------------------------------------------------

	@Override
	public Class getTargetType() {
		return Long.class;
	}

	@Override
	public Long convert(Date sourceValue) throws ConversionException {
		if (sourceValue == null)
			return null;
		return sourceValue.getTime() + timeZone.getRawOffset();
	}

}