001    /*
002     * Copyright (c) 2006 Henri Sivonen
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package org.whattf.datatype;
024    
025    import java.util.regex.Pattern;
026    
027    /**
028     * This datatype shall accept strings that conform to the format specified for 
029     * <a href='http://whatwg.org/specs/web-apps/current-work/#datetime'><code>datetime</code></a> 
030     * attribute of the <code>ins</code> and <code>del</code> elements in Web Applications 1.0.
031     * <p>If the time zone designator is not "<code>Z</code>", the absolute value of the time 
032     * zone designator must not exceed 12 hours.
033     * <p>This datatype must not accept the empty string.
034     * <p>Note that allowing a numeric time zone designator is not the only difference with 
035     * <a href='#datetime'><code>datetime</code></a>. This type requires seconds to be explicitly 
036     * present.
037     * 
038     * @version $Id: DatetimeTz.java,v 1.4 2006/11/18 11:51:44 hsivonen Exp $
039     * @author hsivonen
040     */
041    public final class DatetimeTz extends AbstractDatetime {
042    
043        /**
044         * The singleton instance.
045         */
046        public static final DatetimeTz THE_INSTANCE = new DatetimeTz();
047    
048        /**
049         * The rexexp for this datatype.
050         */
051        private static final Pattern THE_PATTERN = Pattern.compile("^([0-9]{4,})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(?:\\.[0-9]+)?(?:Z|(?:([+-][0-9]{2}):([0-9]{2})))$");
052    
053        /**
054         * Constructor.
055         */
056        private DatetimeTz() {
057            super();
058        }
059    
060        /**
061         * Returns the regexp for this datatype.
062         * 
063         * @return the regexp for this datatype
064         * @see org.whattf.datatype.AbstractDatetime#getPattern()
065         */
066        protected final Pattern getPattern() {
067            return THE_PATTERN;
068        }
069    }