JaxbDateAdapter.java

/*
 * Copyright 2006-2014 the original author or authors.
 *
 * 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.jrecruiter.model;

import java.util.Date;

import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import org.jrecruiter.common.CalendarUtils;


/**
 * The date information stored for throughout the JRecruiter domain model is
 * using @see {@link java.util.Date} which in most situation is fine as we only
 * care about UTC times. However, when serializing out XML data using {@link java.util.Date}
 * Jaxb by default uses the {@link XMLGregorianCalendar} to serialize the date.
 *
 * Since {@link java.util.Date} does not store Timezone information, Jaxb by
 * default uses the Timezone information from the JVM. Therefore, with the default
 * behavior using JAXB, JRecruiter instance running in different timezone would yield
 * different XML serialized data.
 *
 * Hence, the {@link JaxbDateAdapter} that ensures that all dates serialized out
 * will conform to UTC.
 *
 * @author Gunnar Hillert
 *
 */
public class JaxbDateAdapter extends XmlAdapter<String, Date> {

		public String marshal(Date date) throws Exception {
			return CalendarUtils.getXmlFormatedDate(date);
		}

		public Date unmarshal(String dateString) throws Exception {

			final DatatypeFactory dataTypeFactory;

			try {
				dataTypeFactory = DatatypeFactory.newInstance();
			} catch (DatatypeConfigurationException e) {
				throw new IllegalStateException(e.getMessage(),e);
			}

			final XMLGregorianCalendar xmlCalendar = dataTypeFactory.newXMLGregorianCalendar(dateString);

			return xmlCalendar.toGregorianCalendar().getTime();

		}


}