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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30   * then withdrawn, but the wonderful thing about standards is the moment you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 RSS20_URI = "http://backend.userland.com/rss2";
39  
40      public RSS20wNSParser() {
41          this("rss_2.0wNS");
42      }
43  
44      protected RSS20wNSParser(String 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  }