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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

2.0.1 - 2026-02-03

Changed

  • Reorganized test suite into structured packages by RFC and component (core/components, core/properties, core/rfc5545, extensions/rfc7986, extensions/rfc9073, extensions/rfc9074, infrastructure, integration, performance, compatibility)
  • Consolidated duplicate tests (716 → 694 tests across 67 classes)
  • Source code cleanups: removed unused imports and dead code

Dependencies

  • Updated maven-enforcer-plugin to 3.6.2
  • Updated versions-maven-plugin to 2.21.0

2.0.0 - 2026-01-27

Added

  • RFC 9073 - Event Publishing Extensions
    • PARTICIPANT component with UID, PARTICIPANT-TYPE, CALENDAR-ADDRESS, STRUCTURED-DATA, NAME, and DESCRIPTION properties
    • VLOCATION component with UID, NAME, DESCRIPTION, GEO, LOCATION-TYPE, CATEGORIES, and URL properties
    • VRESOURCE component with UID, NAME, DESCRIPTION, GEO, RESOURCE-TYPE, and STRUCTURED-DATA properties
    • STYLED-DESCRIPTION property for rich-text descriptions (HTML, Markdown)
    • CALENDAR-ADDRESS, LOCATION-TYPE, PARTICIPANT-TYPE, and RESOURCE-TYPE property classes
  • RFC 9074 - VALARM Extensions
    • PROXIMITY property for location-based alarm triggers (ARRIVE, DEPART, CONNECT, DISCONNECT)
    • STRUCTURED-DATA property for VALARM components
  • RFC 7986 - Calendar Extensions
    • COLOR, IMAGE, and CONFERENCE properties for VEVENT/VTODO/VJOURNAL
    • NAME and CALENDAR-ADDRESS properties for VCALENDAR
    • RefreshInterval and Source property classes
  • RFC 5546 - iTIP Protocol
    • METHOD property parsing, storage, and serialization
    • METHOD value validation against RFC 5546 constants in strict mode
    • iTIP flow support for PUBLISH, REQUEST, REPLY, and CANCEL methods
  • VALARM component with ACTION, TRIGGER, SUMMARY, DESCRIPTION, DURATION, REPEAT properties and multiple ATTENDEE/ATTACH support
  • VALARM subcomponent parsing across VEVENT, VTODO, and VJOURNAL
  • VAVAILABILITY component with BUSYTYPE support (BUSY, FREE, BUSY-UNAVAILABLE, BUSY-TENTATIVE)
  • Organizer and Contact property classes
  • VEVENT enhancements: ORGANIZER, CONTACT, PRIORITY, REQUEST-STATUS, GEO
  • Comprehensive validation with detailed error reporting for Event, Todo, Journal, Timezone, and RRULE components
  • Advanced recurrence support with getAllOccurrences for complex RRULE patterns with RDATE/EXDATE exceptions
  • Performance optimizations: streaming parsing mode, configurable buffer sizes, performance monitoring metrics
  • RFC 5545 line folding in all toICalendar() methods
  • Utils.exportToFile() and Utils.importFromFile() utilities
  • Comprehensive RFC 5545 compliance test framework (sections 3.1–4.0)
  • Dependabot for automated dependency updates
  • GitHub Actions CI workflow

Changed

  • Java 17+ now required (up from Java 11)
  • Enhanced VTODO status handling with strict validation (COMPLETED status requires COMPLETED date and PERCENT-COMPLETE=100)
  • Improved RRULE validation: FREQ values, INTERVAL ranges, COUNT/UNTIL mutual exclusivity, BYxxx rule compatibility checks
  • Enhanced timezone validation: TZID format, TZURL, offset format checking
  • Improved text escaping per RFC 5545

Fixed

  • TRANSP property parsing (was incorrectly using parseStatus instead of direct value parsing)
  • Todo.java compilation errors (duplicate methods, missing constructors)
  • Organizer.java inheritance issues (Property constructor compatibility)

Removed

  • Ant build file (Maven only going forward)

1.0.2 - 2024-09-02

Changed

  • Bundled Google RFC 2445 RRule library source directly, since no reliable Maven artifact is available (source unmodified except for a Java 9+ compatibility fix)
  • Switched back to Java 11 (Java 17+ features were not yet in use)

Removed

  • Journal UI code (moved to its own repository at craigk5n/k5njournal)

1.0.1 - 2024-08-28

Added

  • New unit tests

Changed

  • Updated to Java 17

Fixed

  • Fixes for many existing tests

1.0.0 - 2021-12-14

Changed

  • Converted build system from Ant to Maven
  • Restructured directories for Maven conventions
  • Upgraded from JUnit 3 to JUnit 5
  • Reformatted code to standard Java formatting
  • Refactored collections: replaced Vector with List/ArrayList, simplified loops

Fixed

  • RRULE code that threw exceptions when no timezone info was provided

[0.4.8]

Fixed

  • Creating Event would lose start date setting
  • Bug in CSVParser class in parser method (patch 2859626)

Added

  • ISO 8601 date parsing in CSVParser (patch 2860537)
  • yDoc build documentation (patch 2864816)

[0.4.7] - 2008-01-31

Added

  • CalendarPanelApplet class for displaying remote iCalendar files in a Java applet

[0.4.6] - 2008-01-14

Added

  • EXDATE and RDATE support in VEVENT
  • ATTENDEE read/write support
  • CREATED field support
  • TRANSP field support in VEVENT

Fixed

  • Empty UID on new events
  • Floating date-time handling (added Date.setFloating/Date.isFloating)
  • CalendarPanel header area not resizing on font changes

[0.4.5] - 2008-01-03

Added

  • Multi-column day layout in CalendarPanel for days with many events
  • Custom mouse-over popup displays replacing Swing ToolTip
  • setFont support in CalendarPanel

Fixed

  • Weekly repeating events not saved correctly
  • CalendarPanel scrollbar values inaccurate after pressing "Today" button

[0.4.4] - 2007-12-12

Fixed

  • Generated iCalendar output for RRULEs

Added

  • Simple constructor for Rrule class

[0.4.3] - 2007-09-20

Added

  • ATTACH property support with Apache Commons Codec for base64 encoding/decoding
  • getNamedAttribute method on all Property classes
  • Performance improvements for parsing long folded lines (inline attachments)

[0.4.2] - 2007-08-01

Added

  • STATUS field support in Event and Journal classes
  • CalendarPanel: different background for today's date, "Today" button, background color override support

[0.4.1] - 2007-06-12

Added

  • CSVParser for parsing CSV calendar data from MS Outlook

Changed

  • CalendarPanel modified to work with Java 1.2 (removed generics)

[0.4.0] - 2007-06-11

Added

  • CalendarPanel Swing GUI component
  • source-zip and javadoc Ant targets

[0.3.0] - 2007-05-30

Added

  • Google RRULE Java implementation for generating recurrence dates
  • getDayOfWeek, getFirstDayOfWeekForYear, getLastDayOfWeekForYear in Utils
  • getWeekOfYear, getDayOfYear, getDayOfWeek, isBefore, isAfter methods on Date
  • setUserData/getUserData methods on Event
  • Timezone support via Joda Time
  • Comment and Location support for events

Fixed

  • Numerous RRULE bugs
  • Duration in Event

[0.2.6] - 2007-04-24

Changed

  • Replaced "Clear" button for text search with graphic icon (k5njournal)

[0.2.5] - 2007-04-24

Added

  • Text search filter (k5njournal)
  • Export to ICS in File menu (k5njournal)

Fixed

  • Clicking journal list column headers to sort caused wrong entry display

[0.2.4] - 2007-04-18

Changed

  • Wrap text at word boundaries in entry descriptions (k5njournal)
  • Default to Windows look and feel (k5njournal)

Fixed

  • NullPointerException when data file is missing DTSTART values

[0.2.3] - 2007-04-18

Fixed

  • JTree not refreshing to show newly added dates (k5njournal)

[0.2.2] - 2007-04-17

Fixed

  • NullPointerException if no journal entries yet (k5njournal)

[0.2.1] - 2007-04-16

Fixed

  • k5njournal compatibility with Java 1.4

[0.2.0] - 2007-04-16

Added

  • k5njournal application (java -jar k5njournal-0.2.0.jar)
  • Journal object (VJOURNAL) implementation
  • CLASS and URL support in Event
  • Unit tests based on JUnit

Changed

  • Made most Event members protected with get/set methods
  • Renamed classes with "Ical" to "ICalendar"
  • Changed Date.hasTime to Date.isDateOnly
  • Added getter/setter methods to Date
  • Added Utils.DateToYYYYMMDD method

Fixed

  • LANGUAGE attribute handling in Description and Summary
  • VALUE=DATE attribute handling for dates
  • Day-of-month error checking including leap year
  • Date parsing for UTC dates (patch 1464212)

[0.1.0] - 2006-02-02

Added

  • Initial public release