org.apache.openmeetings.db.util.TimezoneUtil.java Source code

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Here is the source code for org.apache.openmeetings.db.util.TimezoneUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.openmeetings.db.util;

import static org.apache.openmeetings.util.OpenmeetingsVariables.getDefaultTimezone;

import java.util.TimeZone;

import org.apache.openmeetings.db.entity.user.User;
import org.apache.wicket.util.string.Strings;

public class TimezoneUtil {
    private TimezoneUtil() {
    }

    /**
     *
     * @param timeZoneId
     *            the ID for a TimeZone, either an abbreviation such as "PST", a
     *            full name such as "America/Los_Angeles", or a custom ID such as
     *            "GMT-8:00". Note that the support of abbreviations is for JDK
     *            1.1.x compatibility only and full names should be used.
     * @return the specified TimeZone, or the GMT zone if the given ID cannot be
     *         understood.
     */
    public static TimeZone getTimeZone(String timeZoneId) {
        return TimeZone.getTimeZone(Strings.isEmpty(timeZoneId) ? getDefaultTimezone() : timeZoneId);
    }

    /**
     * Returns the timezone based on the user profile, if not return the timezone
     * from the server
     *
     * @param user
     *            to get timezone for
     * @return {@link TimeZone} of given user
     */
    public static TimeZone getTimeZone(User user) {
        return getTimeZone(user == null ? null : user.getTimeZoneId());
    }
}