001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.lang3.time; 019 020import java.util.TimeZone; 021 022import org.apache.commons.lang3.ObjectUtils; 023 024/** 025 * Helps to deal with {@link java.util.TimeZone}s. 026 * 027 * @since 3.7 028 */ 029public class TimeZones { 030 031 /** Do not instantiate. */ 032 private TimeZones() { 033 } 034 035 /** 036 * A public version of {@link java.util.TimeZone}'s package private {@code GMT_ID} field. 037 */ 038 public static final String GMT_ID = "GMT"; 039 040 /** 041 * The GMT time zone. 042 * 043 * @since 3.13.0 044 */ 045 public static final TimeZone GMT = TimeZone.getTimeZone(GMT_ID); 046 047 /** 048 * Returns the given TimeZone if non-{@code null}, otherwise {@link TimeZone#getDefault()}. 049 * 050 * @param timeZone a locale or {@code null}. 051 * @return the given locale if non-{@code null}, otherwise {@link TimeZone#getDefault()}. 052 * @since 3.13.0 053 */ 054 public static TimeZone toTimeZone(final TimeZone timeZone) { 055 return ObjectUtils.getIfNull(timeZone, TimeZone::getDefault); 056 } 057 058}