This archive contains sample Java code implementing the logic underneath the CPL tag. The class edu.columbia.cpl.Recurrence implements a recurrence. It has all the accessors necessary for setting the parameters of a recurrence. There are two support classes, edu.columbia.cpl.Duration (which represents a duration interval) and edu.columbia.cpl.DayAndPosition (which represents byday rules like "fourth thursday"). This code is only a rudimentary implementation of the CPL time-switch. It is missing some error checking, and does not handle the "bysetpos" parameter, but is otherwise more-or-less complete. Known bugs with the code are listed in the file 'BUGS'. The class TestRecur runs through those examples from RFC 2445 which do not use "bysetpos". A few tests are adjusted because of obvious errors in RFC 2445. The output of this file (which I believe to be correct) is in the file test-output. Written by Jonathan Lennox . All comments welcome. This software bears the following copyright notice and license. (This is the standard 3-clause BSD license.) Copyright (c) 2000 - 2004, Columbia University. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.