001package biweekly;
002
003/*
004 Copyright (c) 2013-2015, Michael Angstadt
005 All rights reserved.
006
007 Redistribution and use in source and binary forms, with or without
008 modification, are permitted provided that the following conditions are met: 
009
010 1. Redistributions of source code must retain the above copyright notice, this
011 list of conditions and the following disclaimer. 
012 2. Redistributions in binary form must reproduce the above copyright notice,
013 this list of conditions and the following disclaimer in the documentation
014 and/or other materials provided with the distribution. 
015
016 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
017 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
018 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
019 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
020 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
021 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
022 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
023 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
024 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
025 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
026 */
027
028/**
029 * Defines all supported versions of the iCalendar standard.
030 * @author Michael Angstadt
031 */
032public enum ICalVersion {
033        /**
034         * The original vCalendar specification.
035         * @see <a href="http://www.imc.org/pdi/pdiproddev.html">1.0 specs</a>
036         */
037        V1_0("1.0"),
038
039        /**
040         * An older, deprecated version of the iCalendar specification
041         * (very similar to {@link #V2_0}).
042         * @see <a href="https://tools.ietf.org/html/rfc2445">RFC 2445</a>
043         */
044        V2_0_DEPRECATED("2.0"),
045
046        /**
047         * The latest iCalendar specification.
048         * @see <a href="https://tools.ietf.org/html/rfc5545">RFC 5545</a>
049         */
050        V2_0("2.0");
051
052        private final String version;
053
054        /**
055         * @param version the version number
056         */
057        private ICalVersion(String version) {
058                this.version = version;
059        }
060
061        /**
062         * Gets the text representation of this version.
063         * @return the text representation
064         */
065        public String getVersion() {
066                return version;
067        }
068
069        /**
070         * Gets a {@link ICalVersion} instance based on the given version number.
071         * @param version the version number (e.g. "2.0")
072         * @return the object or null if not found
073         */
074        public static ICalVersion get(String version) {
075                if (V1_0.version.equals(version)) {
076                        return V1_0;
077                }
078                if (V2_0.version.equals(version)) {
079                        return V2_0;
080                }
081                return null;
082        }
083
084        @Override
085        public String toString() {
086                if (this == V2_0_DEPRECATED) {
087                        return version + " (obsoleted)";
088                }
089                return version;
090        }
091}