001 /*
002 * The MIT License
003 * Copyright (c) 2012 Microsoft Corporation
004 *
005 * Permission is hereby granted, free of charge, to any person obtaining a copy
006 * of this software and associated documentation files (the "Software"), to deal
007 * in the Software without restriction, including without limitation the rights
008 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
009 * copies of the Software, and to permit persons to whom the Software is
010 * furnished to do so, subject to the following conditions:
011 *
012 * The above copyright notice and this permission notice shall be included in
013 * all copies or substantial portions of the Software.
014 *
015 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
016 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
017 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
018 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
019 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
020 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
021 * THE SOFTWARE.
022 */
023
024 package microsoft.exchange.webservices.data.util;
025
026 import org.apache.commons.lang3.StringUtils;
027 import org.joda.time.format.DateTimeFormat;
028 import org.joda.time.format.DateTimeFormatter;
029
030 import java.util.Date;
031
032 public final class DateTimeUtils {
033
034 private static final DateTimeFormatter[] DATE_TIME_FORMATS = createDateTimeFormats();
035 private static final DateTimeFormatter[] DATE_FORMATS = createDateFormats();
036
037
038 private DateTimeUtils() {
039 throw new UnsupportedOperationException();
040 }
041
042
043 /**
044 * Converts a date time string to local date time.
045 *
046 * Note: this method also allows dates without times, in which case the time will be 00:00:00 in the
047 * supplied timezone. UTC timezone will be assumed if no timezone is supplied.
048 *
049 * @param value The string value to parse.
050 * @return The parsed {@link Date}.
051 *
052 * @throws java.lang.IllegalArgumentException If string can not be parsed.
053 */
054 public static Date convertDateTimeStringToDate(String value) {
055 return parseInternal(value, false);
056 }
057
058 /**
059 * Converts a date string to local date time.
060 *
061 * UTC timezone will be assumed if no timezone is supplied.
062 *
063 * @param value The string value to parse.
064 * @return The parsed {@link Date}.
065 *
066 * @throws java.lang.IllegalArgumentException If string can not be parsed.
067 */
068 public static Date convertDateStringToDate(String value) {
069 return parseInternal(value, true);
070 }
071
072
073 private static Date parseInternal(String value, boolean dateOnly) {
074 String originalValue = value;
075
076 if (StringUtils.isEmpty(value)) {
077 return null;
078 } else {
079 if (value.endsWith("z")) {
080 // This seems to be an edge case. Let's uppercase the Z to be sure.
081 value = value.substring(0, value.length() - 1) + "Z";
082 }
083
084 final DateTimeFormatter[] formats = dateOnly ? DATE_FORMATS : DATE_TIME_FORMATS;
085 for (final DateTimeFormatter format : formats) {
086 try {
087 return format.parseDateTime(value).toDate();
088 } catch (IllegalArgumentException e) {
089 // Ignore and try the next pattern.
090 }
091 }
092 }
093
094 throw new IllegalArgumentException(
095 String.format("Date String %s not in valid UTC/local format", originalValue));
096 }
097
098 private static DateTimeFormatter[] createDateTimeFormats() {
099 return new DateTimeFormatter[] {
100 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ssZ").withZoneUTC(),
101 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSSZ").withZoneUTC(),
102 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSZ").withZoneUTC(),
103 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss").withZoneUTC(),
104 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSS").withZoneUTC(),
105 DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSS").withZoneUTC(),
106 DateTimeFormat.forPattern("yyyy-MM-ddZ").withZoneUTC(),
107 DateTimeFormat.forPattern("yyyy-MM-dd").withZoneUTC()
108 };
109 }
110
111 private static DateTimeFormatter[] createDateFormats() {
112 return new DateTimeFormatter[] {
113 DateTimeFormat.forPattern("yyyy-MM-ddZ").withZoneUTC(),
114 DateTimeFormat.forPattern("yyyy-MM-dd").withZoneUTC()
115 };
116 }
117
118 }