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Java > Open Source Codes > com > sun > syndication > io > impl > RSS20wNSParser


1 /*
2  * Copyright 2004 Sun Microsystems, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package com.sun.syndication.io.impl;
18
19 import org.jdom.Document;
20 import org.jdom.Element;
21 import org.jdom.Namespace;
22 import com.sun.syndication.feed.WireFeed;
23
24
25 /**
26  * To address issue with certain feeds (brought up by Charles Miller):
27  *
28  * "During the debacle that was the rollout of RSS2.0, this namespace was tried,
29  * and even appeared in Dave Winer's Scripting News feed for a while. It was
30  * then withdrawn, but the wonderful thing about standards is the moment you
31  * roll one out, even if it's marked as unfinished and subject to change,
32  * someone will end up stuck with it forever."
33  *
34  * Note that there is not counter part on the generator, we only generate the final RSS2
35  *
36  */
37 public class RSS20wNSParser extends RSS20Parser {
38     private static String JavaDoc RSS20_URI = "http://backend.userland.com/rss2";
39
40     public RSS20wNSParser() {
41         this("rss_2.0wNS");
42     }
43
44     protected RSS20wNSParser(String JavaDoc type) {
45         super(type);
46     }
47
48     public boolean isMyType(Document document) {
49         Element rssRoot = document.getRootElement();
50         Namespace defaultNS = rssRoot.getNamespace();
51         boolean ok = defaultNS!=null && defaultNS.equals(getRSSNamespace());
52         if (ok) {
53             ok = super.isMyType(document);
54         }
55         return ok;
56     }
57
58     protected Namespace getRSSNamespace() {
59         return Namespace.getNamespace(RSS20_URI);
60     }
61
62     /**
63      * After we parse the feed we put "rss_2.0" in it (so converters and generators work)
64      * this parser is a phantom.
65      *
66      */
67     protected WireFeed parseChannel(Element rssRoot) {
68         WireFeed wFeed = super.parseChannel(rssRoot);
69         wFeed.setFeedType("rss_2.0");
70         return wFeed;
71     }
72
73 }
74
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