eu.cloudwave.wp5.common.util.DateTimes.java Source code

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/*******************************************************************************
 * Copyright 2015 Software Evolution and Architecture Lab, University of Zurich
 * 
 * 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 eu.cloudwave.wp5.common.util;

import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

/**
 * Utility classes for dates and times.
 */
public class DateTimes {

    private static final String DFLT_DATE_PATTERN = "dd.MM.yyyy";
    private static final String DFLT_TIME_PATTERN = "HH:mm:ss";
    private static final String DFLT_DATE_TIME_PATTERN = DFLT_DATE_PATTERN + " " + DFLT_TIME_PATTERN;

    /**
     * Creates a {@link DateTime} for the given milliseconds.
     * 
     * @param millis
     *          milliseconds
     * @return the created {@link DateTime}
     */
    public static DateTime fromMilliSeconds(final long millis) {
        return new DateTime(millis);
    }

    /**
     * Returns the given {@link DateTime} formatted according to the pattern {@link #DFLT_DATE_TIME_PATTERN}.
     * 
     * @param dateTime
     *          the {@link DateTime}
     * @return the formatted {@link DateTime} as {@link String}
     */
    public static String format(final DateTime dateTime) {
        return format(dateTime, DFLT_DATE_TIME_PATTERN);
    }

    /**
     * Returns the given {@link DateTime} formatted according to the given pattern.
     * 
     * @param dateTime
     *          the {@link DateTime}
     * @param pattern
     *          the formatting pattern
     * @return the formatted {@link DateTime} as {@link String}
     */
    public static String format(final DateTime dateTime, final String pattern) {
        final DateTimeFormatter formatter = DateTimeFormat.forPattern(pattern);
        return dateTime.toString(formatter);
    }

    private DateTimes() {
    }

}