001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package javax.mail.internet;
021    
022    import java.text.FieldPosition;
023    import java.text.NumberFormat;
024    import java.text.ParsePosition;
025    import java.text.SimpleDateFormat;
026    import java.util.Calendar;
027    import java.util.Date;
028    import java.util.Locale;
029    
030    /**
031     * Formats ths date as specified by
032     * draft-ietf-drums-msg-fmt-08 dated January 26, 2000
033     * which supercedes RFC822.
034     * <p/>
035     * <p/>
036     * The format used is <code>EEE, d MMM yyyy HH:mm:ss Z</code> and
037     * locale is always US-ASCII.
038     *
039     * @version $Rev: 467553 $ $Date: 2006-10-25 00:01:51 -0400 (Wed, 25 Oct 2006) $
040     */
041    public class MailDateFormat extends SimpleDateFormat {
042        public MailDateFormat() {
043            super("EEE, d MMM yyyy HH:mm:ss Z", Locale.US);
044        }
045    
046        public StringBuffer format(Date date, StringBuffer buffer, FieldPosition position) {
047            return super.format(date, buffer, position);
048        }
049    
050        public Date parse(String string, ParsePosition position) {
051            return super.parse(string, position);
052        }
053    
054        /**
055         * The calendar cannot be set
056         * @param calendar
057         * @throws UnsupportedOperationException
058         */
059        public void setCalendar(Calendar calendar) {
060            throw new UnsupportedOperationException();
061        }
062    
063        /**
064         * The format cannot be set
065         * @param format
066         * @throws UnsupportedOperationException
067         */
068        public void setNumberFormat(NumberFormat format) {
069            throw new UnsupportedOperationException();
070        }
071    }