Hack23/cia

/*
 * Copyright 2010-2021 James Pether Sörling
 *
 * 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.
 *
 *    $Id$
 *  $HeadURL$
*/
package com.hack23.cia.model.common.impl.xml;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import javax.xml.bind.DatatypeConverter;
import javax.xml.bind.annotation.adapters.XmlAdapter;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class XmlDateTypeAdapter.
 */
public final class XmlDateTypeAdapter extends XmlAdapter<String,Date> {

    private static final String YYYY_MM_DD_HH_MM_SS = "2001-01-01 00:00:00";

    /** The Constant YYYY_MM_DD. */
    private static final String YYYY_MM_DD = "yyyy-MM-dd";

    private static final Logger LOGGER = LoggerFactory
            .getLogger(XmlDateTypeAdapter.class);

    /**
     * Instantiates a new xml time type adapter.
     */
    public XmlDateTypeAdapter() {
        super();
    }


    @Override
    public Date unmarshal(final String s) {
        if (s == null) {
            return null;
        }
        // hack to supported swedish riksdags xml.
        final String dateStr = s.trim();
        if (YYYY_MM_DD_HH_MM_SS.length() == dateStr.length()
                || YYYY_MM_DD.length() == dateStr.length()) {
            try {
                return new SimpleDateFormat(
                        YYYY_MM_DD,Locale.ENGLISH).parse(dateStr.substring(0,YYYY_MM_DD.length()));
            } catch (final ParseException e) {
                LOGGER.warn("Problem parsing date from str:{}",s,e);
                return null;
            }
        } else if (dateStr.length() > YYYY_MM_DD.length()) {
            try {
                return DatatypeConverter.parseDate(s).getTime();
            } catch (final Exception e) {
                LOGGER.warn("Problem parsing date from str:{}",s,e);
                return null;
            }
        } else {
            return null;
        }

    }

    @Override
    public String marshal(final Date dt) {
        if (dt == null) {
            return null;
        }
        final Calendar c = Calendar.getInstance();
        c.setTime(dt);
        return DatatypeConverter.printDate(c);
    }

}