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https://codeberg.org/Mercury-IM/Smack
synced 2025-09-10 18:59:41 +02:00
SMACK-391 Moved all date parsing into StringUtils and made it much more robust in handling multiple valid and invalid formats.
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13428 b35dd754-fafc-0310-a699-88a17e54d16e
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rcollier
parent
2afd3bdfa3
commit
1d36ae8db4
5 changed files with 505 additions and 202 deletions
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@ -209,7 +209,7 @@ public class Presence extends Packet {
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* @return the xml:lang of this Presence, or null if one has not been set.
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* @since 3.0.2
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*/
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private String getLanguage() {
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public String getLanguage() {
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return language;
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}
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@ -26,27 +26,87 @@ import java.security.NoSuchAlgorithmException;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.List;
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import java.util.Random;
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import java.util.TimeZone;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* A collection of utility methods for String objects.
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*/
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public class StringUtils {
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/**
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/**
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* Date format as defined in XEP-0082 - XMPP Date and Time Profiles. The time zone is set to
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* UTC.
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* <p>
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* Date formats are not synchronized. Since multiple threads access the format concurrently, it
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* must be synchronized externally or you can use the convenience methods
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* {@link #parseXEP0082Date(String)} and {@link #formatXEP0082Date(Date)}.
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* @deprecated This public version will be removed in favor of using the methods defined within this class.
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*/
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public static final DateFormat XEP_0082_UTC_FORMAT = new SimpleDateFormat(
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"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
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public static final DateFormat XEP_0082_UTC_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
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/*
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* private version to use internally so we don't have to be concerned with thread safety.
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*/
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private static final DateFormat dateFormatter = DateFormatType.XEP_0082_DATE_PROFILE.createFormatter();
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private static final Pattern datePattern = Pattern.compile("^\\d+-\\d+-\\d+$");
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private static final DateFormat timeFormatter = DateFormatType.XEP_0082_TIME_MILLIS_ZONE_PROFILE.createFormatter();
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private static final Pattern timePattern = Pattern.compile("^(\\d+:){2}\\d+.\\d+(Z|([+-](\\d+:\\d+)))$");
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private static final DateFormat timeNoZoneFormatter = DateFormatType.XEP_0082_TIME_MILLIS_PROFILE.createFormatter();
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private static final Pattern timeNoZonePattern = Pattern.compile("^(\\d+:){2}\\d+.\\d+$");
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private static final DateFormat timeNoMillisFormatter = DateFormatType.XEP_0082_TIME_ZONE_PROFILE.createFormatter();
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private static final Pattern timeNoMillisPattern = Pattern.compile("^(\\d+:){2}\\d+(Z|([+-](\\d+:\\d+)))$");
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private static final DateFormat timeNoMillisNoZoneFormatter = DateFormatType.XEP_0082_TIME_PROFILE.createFormatter();
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private static final Pattern timeNoMillisNoZonePattern = Pattern.compile("^(\\d+:){2}\\d+$");
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private static final DateFormat dateTimeFormatter = DateFormatType.XEP_0082_DATETIME_MILLIS_PROFILE.createFormatter();
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private static final Pattern dateTimePattern = Pattern.compile("^\\d+(-\\d+){2}+T(\\d+:){2}\\d+.\\d+(Z|([+-](\\d+:\\d+)))?$");
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private static final DateFormat dateTimeNoMillisFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
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private static final Pattern dateTimeNoMillisPattern = Pattern.compile("^\\d+(-\\d+){2}+T(\\d+:){2}\\d+(Z|([+-](\\d+:\\d+)))?$");
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private static final DateFormat xep0091Formatter = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
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private static final DateFormat xep0091Date6DigitFormatter = new SimpleDateFormat("yyyyMd'T'HH:mm:ss");
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private static final DateFormat xep0091Date7Digit1MonthFormatter = new SimpleDateFormat("yyyyMdd'T'HH:mm:ss");
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private static final DateFormat xep0091Date7Digit2MonthFormatter = new SimpleDateFormat("yyyyMMd'T'HH:mm:ss");
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private static final Pattern xep0091Pattern = Pattern.compile("^\\d+T\\d+:\\d+:\\d+$");
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private static final List<PatternCouplings> couplings = new ArrayList<PatternCouplings>();
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static {
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XEP_0082_UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
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TimeZone utc = TimeZone.getTimeZone("UTC");
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XEP_0082_UTC_FORMAT.setTimeZone(utc);
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dateFormatter.setTimeZone(utc);
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timeFormatter.setTimeZone(utc);
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timeNoZoneFormatter.setTimeZone(utc);
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timeNoMillisFormatter.setTimeZone(utc);
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timeNoMillisNoZoneFormatter.setTimeZone(utc);
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dateTimeFormatter.setTimeZone(utc);
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dateTimeNoMillisFormatter.setTimeZone(utc);
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xep0091Formatter.setTimeZone(utc);
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xep0091Date6DigitFormatter.setTimeZone(utc);
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xep0091Date7Digit1MonthFormatter.setTimeZone(utc);
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xep0091Date7Digit1MonthFormatter.setLenient(false);
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xep0091Date7Digit2MonthFormatter.setTimeZone(utc);
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xep0091Date7Digit2MonthFormatter.setLenient(false);
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couplings.add(new PatternCouplings(datePattern, dateFormatter));
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couplings.add(new PatternCouplings(dateTimePattern, dateTimeFormatter));
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couplings.add(new PatternCouplings(dateTimeNoMillisPattern, dateTimeNoMillisFormatter));
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couplings.add(new PatternCouplings(timePattern, timeFormatter));
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couplings.add(new PatternCouplings(timeNoZonePattern, timeNoZoneFormatter));
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couplings.add(new PatternCouplings(timeNoMillisPattern, timeNoMillisFormatter));
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couplings.add(new PatternCouplings(timeNoMillisNoZonePattern, timeNoMillisNoZoneFormatter));
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}
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private static final char[] QUOTE_ENCODE = """.toCharArray();
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@ -56,18 +116,139 @@ public class StringUtils {
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private static final char[] GT_ENCODE = ">".toCharArray();
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/**
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* Parses the given date string in the XEP-0082 - XMPP Date and Time Profiles format.
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* Parses the given date string in the <a href="http://xmpp.org/extensions/xep-0082.html">XEP-0082 - XMPP Date and Time Profiles</a>.
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*
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* @param dateString the date string to parse
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* @return the parsed Date
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* @throws ParseException if the specified string cannot be parsed
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* @deprecated Use {@link #parseDate(String)} instead.
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*
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*/
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public static Date parseXEP0082Date(String dateString) throws ParseException {
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synchronized (XEP_0082_UTC_FORMAT) {
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return XEP_0082_UTC_FORMAT.parse(dateString);
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return parseDate(dateString);
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}
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/**
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* Parses the given date string in either of the three profiles of <a href="http://xmpp.org/extensions/xep-0082.html">XEP-0082 - XMPP Date and Time Profiles</a>
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* or <a href="http://xmpp.org/extensions/xep-0091.html">XEP-0091 - Legacy Delayed Delivery</a> format.
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* <p>
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* This method uses internal date formatters and is thus threadsafe.
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* @param dateString the date string to parse
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* @return the parsed Date
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* @throws ParseException if the specified string cannot be parsed
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*/
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public static Date parseDate(String dateString) throws ParseException {
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Matcher matcher = xep0091Pattern.matcher(dateString);
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/*
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* if date is in XEP-0091 format handle ambiguous dates missing the
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* leading zero in month and day
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*/
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if (matcher.matches()) {
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int length = dateString.split("T")[0].length();
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if (length < 8) {
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Date date = handleDateWithMissingLeadingZeros(dateString, length);
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if (date != null)
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return date;
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}
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else {
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synchronized (xep0091Formatter) {
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return xep0091Formatter.parse(dateString);
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}
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}
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}
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else {
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for (PatternCouplings coupling : couplings) {
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matcher = coupling.pattern.matcher(dateString);
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if (matcher.matches())
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{
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synchronized (coupling.formatter) {
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return coupling.formatter.parse(dateString);
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}
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}
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}
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}
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/*
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* We assume it is the XEP-0082 DateTime profile with no milliseconds at this point. If it isn't, is is just not parseable, then we attempt
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* to parse it regardless and let it throw the ParseException.
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*/
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synchronized (dateTimeNoMillisFormatter) {
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return dateTimeNoMillisFormatter.parse(dateString);
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}
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}
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/**
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* Parses the given date string in different ways and returns the date that
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* lies in the past and/or is nearest to the current date-time.
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*
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* @param stampString date in string representation
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* @param dateLength
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* @param noFuture
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* @return the parsed date
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* @throws ParseException The date string was of an unknown format
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*/
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private static Date handleDateWithMissingLeadingZeros(String stampString, int dateLength) throws ParseException {
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if (dateLength == 6) {
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synchronized (xep0091Date6DigitFormatter) {
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return xep0091Date6DigitFormatter.parse(stampString);
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}
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}
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Calendar now = Calendar.getInstance();
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Calendar oneDigitMonth = parseXEP91Date(stampString, xep0091Date7Digit1MonthFormatter);
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Calendar twoDigitMonth = parseXEP91Date(stampString, xep0091Date7Digit2MonthFormatter);
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List<Calendar> dates = filterDatesBefore(now, oneDigitMonth, twoDigitMonth);
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if (!dates.isEmpty()) {
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return determineNearestDate(now, dates).getTime();
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}
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return null;
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}
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private static Calendar parseXEP91Date(String stampString, DateFormat dateFormat) {
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try {
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synchronized (dateFormat) {
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dateFormat.parse(stampString);
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return dateFormat.getCalendar();
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}
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}
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catch (ParseException e) {
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return null;
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}
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}
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private static List<Calendar> filterDatesBefore(Calendar now, Calendar... dates) {
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List<Calendar> result = new ArrayList<Calendar>();
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for (Calendar calendar : dates) {
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if (calendar != null && calendar.before(now)) {
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result.add(calendar);
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}
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}
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return result;
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}
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private static Calendar determineNearestDate(final Calendar now, List<Calendar> dates) {
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Collections.sort(dates, new Comparator<Calendar>() {
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public int compare(Calendar o1, Calendar o2) {
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Long diff1 = new Long(now.getTimeInMillis() - o1.getTimeInMillis());
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Long diff2 = new Long(now.getTimeInMillis() - o2.getTimeInMillis());
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return diff1.compareTo(diff2);
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}
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});
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return dates.get(0);
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}
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/**
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* Formats a Date into a XEP-0082 - XMPP Date and Time Profiles string.
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*
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@ -75,10 +256,15 @@ public class StringUtils {
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* @return the formatted time string in XEP-0082 format
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*/
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public static String formatXEP0082Date(Date date) {
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synchronized (XEP_0082_UTC_FORMAT) {
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return XEP_0082_UTC_FORMAT.format(date);
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synchronized (dateTimeFormatter) {
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return dateTimeFormatter.format(date);
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}
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}
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public static String formatDate(Date toFormat, DateFormatType type)
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{
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return null;
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}
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/**
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* Returns the name portion of a XMPP address. For example, for the
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@ -562,4 +748,15 @@ public class StringUtils {
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private StringUtils() {
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// Not instantiable.
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}
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private static class PatternCouplings {
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Pattern pattern;
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DateFormat formatter;
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public PatternCouplings(Pattern datePattern, DateFormat dateFormat) {
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pattern = datePattern;
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formatter = dateFormat;
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}
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}
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}
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