de.micromata.genome.gdbfs.FsDateFormat.java Source code

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Here is the source code for de.micromata.genome.gdbfs.FsDateFormat.java

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//
// Copyright (C) 2010-2016 Roger Rene Kommer & Micromata GmbH
//
// 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 de.micromata.genome.gdbfs;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

import org.apache.commons.lang3.StringUtils;

/**
 * Formats standard filesystem date formats.
 * 
 * @author roger
 * 
 */
public class FsDateFormat {

    /**
     * The Constant UTC_TIMEZONE.
     */
    public static final TimeZone UTC_TIMEZONE = TimeZone.getTimeZone("UTC");

    /**
     * The internal timestamp.
     */
    public static ThreadLocal<SimpleDateFormat> internalTimestamp = new ThreadLocal<SimpleDateFormat>() {

        @Override
        protected SimpleDateFormat initialValue() {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
            sdf.setTimeZone(UTC_TIMEZONE);
            return sdf;
        }
    };

    /**
     * convert Stringified date to internal Date
     * 
     * Todo use utc.
     *
     * @param date the date
     * @return the date
     */
    public static Date string2date(String date) {
        if (StringUtils.isEmpty(date) == true) {
            return null;
        }
        try {
            Date ld = internalTimestamp.get().parse(date);
            return ld;
        } catch (ParseException ex) {
            throw new RuntimeException("Cannot parse date: " + date + "; " + ex.getMessage(), ex);

        }
    }

    /**
     * Date2string.
     *
     * @param date the date
     * @return the string
     */
    public static String date2string(Date date) {
        if (date == null) {
            return null;
        }
        return internalTimestamp.get().format(date);
    }
}