1069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/* 2069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/cookie/DateUtils.java $ 3069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Revision: 677240 $ 4069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Date: 2008-07-16 04:25:47 -0700 (Wed, 16 Jul 2008) $ 5069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 6069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 7069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one 8069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * or more contributor license agreements. See the NOTICE file 9069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * distributed with this work for additional information 10069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * regarding copyright ownership. The ASF licenses this file 11069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * to you under the Apache License, Version 2.0 (the 12069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "License"); you may not use this file except in compliance 13069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * with the License. You may obtain a copy of the License at 14069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 15069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 16069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 17069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Unless required by applicable law or agreed to in writing, 18069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * software distributed under the License is distributed on an 19069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * KIND, either express or implied. See the License for the 21069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * specific language governing permissions and limitations 22069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * under the License. 23069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 24069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 25069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This software consists of voluntary contributions made by many 26069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * individuals on behalf of the Apache Software Foundation. For more 27069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * information on the Apache Software Foundation, please see 28069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <http://www.apache.org/>. 29069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 30069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 31069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 32069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpackage org.apache.http.impl.cookie; 33069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 34069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.lang.ref.SoftReference; 35069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.text.ParseException; 36069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.text.SimpleDateFormat; 37069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.Calendar; 38069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.Date; 39069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.HashMap; 40069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.Locale; 41069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.Map; 42069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.util.TimeZone; 43069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 44069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/** 45069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A utility class for parsing and formatting HTTP dates as used in cookies and 46069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * other headers. This class handles dates as defined by RFC 2616 section 47069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 3.3.1 as well as some other common non-standard formats. 48069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 49069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author Christopher Brown 50069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author Michael Becke 51069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 52069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpublic final class DateUtils { 53069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 54069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 55069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Date format pattern used to parse HTTP date headers in RFC 1123 format. 56069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 57069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static final String PATTERN_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz"; 58069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 59069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 60069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Date format pattern used to parse HTTP date headers in RFC 1036 format. 61069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 62069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static final String PATTERN_RFC1036 = "EEEE, dd-MMM-yy HH:mm:ss zzz"; 63069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 64069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 65069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Date format pattern used to parse HTTP date headers in ANSI C 66069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <code>asctime()</code> format. 67069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 68069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static final String PATTERN_ASCTIME = "EEE MMM d HH:mm:ss yyyy"; 69069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 70069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private static final String[] DEFAULT_PATTERNS = new String[] { 71069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project PATTERN_RFC1036, 72069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project PATTERN_RFC1123, 73069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project PATTERN_ASCTIME 74069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project }; 75069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 76069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private static final Date DEFAULT_TWO_DIGIT_YEAR_START; 77069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 78069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static final TimeZone GMT = TimeZone.getTimeZone("GMT"); 79069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 80069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project static { 81069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Calendar calendar = Calendar.getInstance(); 82069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project calendar.setTimeZone(GMT); 83069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project calendar.set(2000, Calendar.JANUARY, 1, 0, 0, 0); 84069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project calendar.set(Calendar.MILLISECOND, 0); 85069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project DEFAULT_TWO_DIGIT_YEAR_START = calendar.getTime(); 86069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 87069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 88069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 89069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Parses a date value. The formats used for parsing the date value are retrieved from 90069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the default http params. 91069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 92069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param dateValue the date value to parse 93069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 94069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return the parsed date 95069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 96069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws DateParseException if the value could not be parsed using any of the 97069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * supported date formats 98069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 99069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static Date parseDate(String dateValue) throws DateParseException { 100069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return parseDate(dateValue, null, null); 101069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 102069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 103069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 104069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Parses the date value using the given date formats. 105069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 106069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param dateValue the date value to parse 107069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param dateFormats the date formats to use 108069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 109069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return the parsed date 110069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 111069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws DateParseException if none of the dataFormats could parse the dateValue 112069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 113069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static Date parseDate(final String dateValue, String[] dateFormats) 114069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throws DateParseException { 115069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return parseDate(dateValue, dateFormats, null); 116069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 117069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 118069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 119069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Parses the date value using the given date formats. 120069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 121069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param dateValue the date value to parse 122069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param dateFormats the date formats to use 123069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param startDate During parsing, two digit years will be placed in the range 124069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <code>startDate</code> to <code>startDate + 100 years</code>. This value may 125069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * be <code>null</code>. When <code>null</code> is given as a parameter, year 126069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <code>2000</code> will be used. 127069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 128069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return the parsed date 129069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 130069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws DateParseException if none of the dataFormats could parse the dateValue 131069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 132069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static Date parseDate( 133069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project String dateValue, 134069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project String[] dateFormats, 135069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Date startDate 136069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project ) throws DateParseException { 137069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 138069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (dateValue == null) { 139069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalArgumentException("dateValue is null"); 140069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 141069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (dateFormats == null) { 142069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project dateFormats = DEFAULT_PATTERNS; 143069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 144069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (startDate == null) { 145069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project startDate = DEFAULT_TWO_DIGIT_YEAR_START; 146069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 147069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // trim single quotes around date if present 148069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // see issue #5279 149069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (dateValue.length() > 1 150069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project && dateValue.startsWith("'") 151069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project && dateValue.endsWith("'") 152069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project ) { 153069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project dateValue = dateValue.substring (1, dateValue.length() - 1); 154069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 155069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 156069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project for (String dateFormat : dateFormats) { 157069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project SimpleDateFormat dateParser = DateFormatHolder.formatFor(dateFormat); 158069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project dateParser.set2DigitYearStart(startDate); 159069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 160069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 161069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return dateParser.parse(dateValue); 162069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (ParseException pe) { 163069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // ignore this exception, we will try the next format 164069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 165069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 166069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 167069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // we were unable to parse the date 168069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new DateParseException("Unable to parse the date " + dateValue); 169069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 170069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 171069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 172069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Formats the given date according to the RFC 1123 pattern. 173069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 174069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param date The date to format. 175069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return An RFC 1123 formatted date string. 176069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 177069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @see #PATTERN_RFC1123 178069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 179069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static String formatDate(Date date) { 180069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return formatDate(date, PATTERN_RFC1123); 181069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 182069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 183069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 184069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Formats the given date according to the specified pattern. The pattern 185069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * must conform to that used by the {@link SimpleDateFormat simple date 186069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * format} class. 187069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 188069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param date The date to format. 189069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param pattern The pattern to use for formatting the date. 190069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return A formatted date string. 191069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 192069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IllegalArgumentException If the given date pattern is invalid. 193069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 194069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @see SimpleDateFormat 195069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 196069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static String formatDate(Date date, String pattern) { 197069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (date == null) throw new IllegalArgumentException("date is null"); 198069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (pattern == null) throw new IllegalArgumentException("pattern is null"); 199069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 200069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project SimpleDateFormat formatter = DateFormatHolder.formatFor(pattern); 201069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return formatter.format(date); 202069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 203069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 204069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** This class should not be instantiated. */ 205069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private DateUtils() { 206069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 207069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 208069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 209069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A factory for {@link SimpleDateFormat}s. The instances are stored in a 210069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * threadlocal way because SimpleDateFormat is not threadsafe as noted in 211069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link SimpleDateFormat its javadoc}. 212069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 213069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author Daniel Mueller 214069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 215069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project final static class DateFormatHolder { 216069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 217069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private static final ThreadLocal<SoftReference<Map<String, SimpleDateFormat>>> 218069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project THREADLOCAL_FORMATS = new ThreadLocal<SoftReference<Map<String, SimpleDateFormat>>>() { 219069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 220069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 221069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected SoftReference<Map<String, SimpleDateFormat>> initialValue() { 222069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return new SoftReference<Map<String, SimpleDateFormat>>( 223069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project new HashMap<String, SimpleDateFormat>()); 224069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 225069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 226069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project }; 227069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 228069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 229069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * creates a {@link SimpleDateFormat} for the requested format string. 230069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 231069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param pattern 232069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * a non-<code>null</code> format String according to 233069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link SimpleDateFormat}. The format is not checked against 234069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <code>null</code> since all paths go through 235069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link DateUtils}. 236069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return the requested format. This simple dateformat should not be used 237069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * to {@link SimpleDateFormat#applyPattern(String) apply} to a 238069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * different pattern. 239069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 240069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public static SimpleDateFormat formatFor(String pattern) { 241069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project SoftReference<Map<String, SimpleDateFormat>> ref = THREADLOCAL_FORMATS.get(); 242069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project Map<String, SimpleDateFormat> formats = ref.get(); 243069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (formats == null) { 244069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project formats = new HashMap<String, SimpleDateFormat>(); 245069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project THREADLOCAL_FORMATS.set( 246069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project new SoftReference<Map<String, SimpleDateFormat>>(formats)); 247069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 248069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 249069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project SimpleDateFormat format = formats.get(pattern); 250069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (format == null) { 251069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project format = new SimpleDateFormat(pattern, Locale.US); 252069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project format.setTimeZone(TimeZone.getTimeZone("GMT")); 253069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project formats.put(pattern, format); 254069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 255069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 256069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return format; 257069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 258069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 259069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 260069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 261069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project} 262