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Java > Open Source Codes > org > columba > ristretto > parser > MimeTypeParser


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Mozilla Public License Version
5  * 1.1 (the "License"); you may not use this file except in compliance with
6  * the License. You may obtain a copy of the License at
7  * http://www.mozilla.org/MPL/
8  *
9  * Software distributed under the License is distributed on an "AS IS" basis,
10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11  * for the specific language governing rights and limitations under the
12  * License.
13  *
14  * The Original Code is Ristretto Mail API.
15  *
16  * The Initial Developers of the Original Code are
17  * Timo Stich and Frederik Dietz.
18  * Portions created by the Initial Developers are Copyright (C) 2004
19  * All Rights Reserved.
20  *
21  * Contributor(s):
22  *
23  * Alternatively, the contents of this file may be used under the terms of
24  * either the GNU General Public License Version 2 or later (the "GPL"), or
25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26  * in which case the provisions of the GPL or the LGPL are applicable instead
27  * of those above. If you wish to allow use of your version of this file only
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29  * use your version of this file under the terms of the MPL, indicate your
30  * decision by deleting the provisions above and replace them with the notice
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32  * the provisions above, a recipient may use your version of this file under
33  * the terms of any one of the MPL, the GPL or the LGPL.
34  *
35  * ***** END LICENSE BLOCK ***** */
36 package org.columba.ristretto.parser;
37
38 import java.util.regex.Matcher JavaDoc;
39 import java.util.regex.Pattern JavaDoc;
40
41 import org.columba.ristretto.message.MimeType;
42
43 /**
44  * Parser for MIME types as defined in RFC 2045.
45  *
46  * @author Timo Stich <tstich@users.sourceforge.net>
47  */
48 public class MimeTypeParser {
49     
50     private static final Pattern JavaDoc mimetypePattern = Pattern.compile("([^/\\s]+)/([^\\s;]+)");
51     
52     private MimeTypeParser() {
53     }
54     
55     /**
56      * Parses a MIME type from a String.
57      * <p>
58      * Example: text/plain
59      *
60      * @param mimeType the String representation of the MIME type
61      * @return the parsed MIME type
62      * @throws ParserException
63      */
64     public static MimeType parse(CharSequence JavaDoc mimeType ) throws ParserException {
65         if( mimeType == null ) throw new ParserException( "Input is null");
66         Matcher JavaDoc matcher = mimetypePattern.matcher(mimeType);
67         if( matcher.find() ) {
68             return new MimeType( matcher.group(1).toLowerCase(), matcher.group(2).toLowerCase());
69         } else throw new ParserException();
70     }
71
72 }
73
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