py.una.pol.karaku.services.util.ServiceUtil.java Source code

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Here is the source code for py.una.pol.karaku.services.util.ServiceUtil.java

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/*-
 * Copyright (c)
 *
 *       2012-2014, Facultad Politcnica, Universidad Nacional de Asuncin.
 *       2012-2014, Facultad de Ciencias Mdicas, Universidad Nacional de Asuncin.
 *       2012-2013, Centro Nacional de Computacin, Universidad Nacional de Asuncin.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301  USA
 */
package py.una.pol.karaku.services.util;

import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import org.springframework.stereotype.Component;

/**
 * Utility class for converting between XMLGregorianCalendar and java.util.Date
 * 
 * @author Hctor Martnez
 * @since 1.0
 * @version 1.0 Jun 19, 2013
 * 
 */
@Component
public class ServiceUtil {

    private DatatypeFactory df = null;

    /**
     * 
     */
    public ServiceUtil() {

        // Creamos un DataTypeFactory para las conversiones a
        // XMLGregorianCalendar
        try {
            df = DatatypeFactory.newInstance();
        } catch (DatatypeConfigurationException dce) {
            throw new IllegalStateException("Exception while obtaining DatatypeFactory instance", dce);
        }
    }

    /**
     * Converts a {@link Date} into an instance of XMLGregorianCalendar
     * 
     * @param date
     *            Instance of {@link Date} or a null reference
     * @return {@link XMLGregorianCalendar} instance whose value is based upon
     *         the value in the date parameter. If the date parameter is null
     *         then this method will simply return null.
     */
    public XMLGregorianCalendar asXMLGregorianCalendar(Date date) {

        if (date == null) {
            return null;
        }
        GregorianCalendar gc = new GregorianCalendar();
        gc.setTimeInMillis(date.getTime());
        return df.newXMLGregorianCalendar(gc);
    }

    /**
     * Converts an XMLGregorianCalendar to an instance of java.util.Date
     * 
     * @param xgc
     *            Instance of {@link XMLGregorianCalendar} or a null reference
     * @return {@link Date} instance whose value is based upon the value in the
     *         xgc parameter. If the xgc parameter is null then this method will
     *         simply return null.
     */
    public Date asDate(XMLGregorianCalendar xgc) {

        if (xgc == null) {
            return null;
        }
        return xgc.toGregorianCalendar().getTime();
    }
}