67 lines
1.9 KiB
Java
67 lines
1.9 KiB
Java
/*
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* Copyright 2021 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sop.util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.TimeZone;
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/**
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* Utility class to parse and format dates as ISO-8601 UTC timestamps.
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*/
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public class UTCUtil {
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public static SimpleDateFormat UTC_FORMATTER = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
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public static SimpleDateFormat[] UTC_PARSERS = new SimpleDateFormat[] {
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UTC_FORMATTER,
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new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX"),
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new SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'"),
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new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'")
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};
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static {
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for (SimpleDateFormat f : UTC_PARSERS) {
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f.setTimeZone(TimeZone.getTimeZone("UTC"));
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}
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}
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/**
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* Parse an ISO-8601 UTC timestamp from a string.
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*
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* @param dateString string
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* @return date
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*/
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public static Date parseUTCDate(String dateString) {
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for (SimpleDateFormat parser : UTC_PARSERS) {
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try {
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return parser.parse(dateString);
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} catch (ParseException e) {
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}
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}
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return null;
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}
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/**
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* Format a date as ISO-8601 UTC timestamp.
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*
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* @param date date
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* @return timestamp string
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*/
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public static String formatUTCDate(Date date) {
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return UTC_FORMATTER.format(date);
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}
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}
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