| /** |
| * 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.atlas.web.util; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.TimeZone; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Support function to parse and format date. |
| */ |
| public final class DateTimeHelper { |
| |
| public static final String ISO8601_FORMAT = "yyyy-MM-dd'T'HH:mm'Z'"; |
| private static final String DATE_PATTERN = |
| "(2\\d\\d\\d|19\\d\\d)-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])T" + "([0-1][0-9]|2[0-3]):([0-5][0-9])Z"; |
| private static final Pattern PATTERN = Pattern.compile(DATE_PATTERN); |
| |
| private DateTimeHelper() { |
| } |
| |
| public static String getTimeZoneId(TimeZone tz) { |
| return tz.getID(); |
| } |
| |
| public static DateFormat getDateFormat() { |
| DateFormat dateFormat = new SimpleDateFormat(ISO8601_FORMAT); |
| dateFormat.setTimeZone(TimeZone.getTimeZone("UTC")); |
| return dateFormat; |
| } |
| |
| public static String formatDateUTC(Date date) { |
| return (date != null) ? getDateFormat().format(date) : null; |
| } |
| |
| public static Date parseDateUTC(String dateStr) { |
| if (!validate(dateStr)) { |
| throw new IllegalArgumentException(dateStr + " is not a valid UTC string"); |
| } |
| try { |
| return getDateFormat().parse(dateStr); |
| } catch (ParseException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public static String formatDateUTCToISO8601(final String dateString, final String dateStringFormat) { |
| |
| try { |
| DateFormat dateFormat = new SimpleDateFormat(dateStringFormat.substring(0, dateString.length())); |
| dateFormat.setTimeZone(TimeZone.getTimeZone("UTC")); |
| return DateTimeHelper.formatDateUTC(dateFormat.parse(dateString)); |
| } catch (ParseException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| /** |
| * Validate date format with regular expression. |
| * |
| * @param date date address for validation |
| * @return true valid date fromat, false invalid date format |
| */ |
| public static boolean validate(final String date) { |
| |
| Matcher matcher = PATTERN.matcher(date); |
| |
| if (matcher.matches()) { |
| |
| matcher.reset(); |
| |
| if (matcher.find()) { |
| |
| int year = Integer.parseInt(matcher.group(1)); |
| String month = matcher.group(2); |
| String day = matcher.group(3); |
| |
| if (day.equals("31") && (month.equals("4") || month.equals("6") || month.equals("9") || month |
| .equals("11") || month.equals("04") || month.equals("06") || month.equals("09"))) { |
| return false; // only 1,3,5,7,8,10,12 has 31 days |
| } else if (month.equals("2") || month.equals("02")) { |
| // leap year |
| if (year % 4 == 0) { |
| return !(day.equals("30") || day.equals("31")); |
| } else { |
| return !(day.equals("29") || day.equals("30") || day.equals("31")); |
| } |
| } else { |
| return true; |
| } |
| } else { |
| return false; |
| } |
| } else { |
| return false; |
| } |
| } |
| } |