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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 com.sun.syndication.feed.rss.Description;
20  import com.sun.syndication.feed.rss.Item;
21  import com.sun.syndication.feed.rss.Channel;
22  import com.sun.syndication.io.FeedException;
23  import org.jdom.Element;
24  import org.jdom.Namespace;
25  
26  import java.util.List;
27  
28  /***
29   * Feed Generator for RSS 1.0
30   * <p/>
31   *
32   * @author Elaine Chien
33   *
34   */
35  
36  public class RSS10Generator extends RSS090Generator {
37      private static final String RSS_URI = "http://purl.org/rss/1.0/";
38      private static final Namespace RSS_NS = Namespace.getNamespace(RSS_URI);
39  
40      public RSS10Generator() {
41          super("rss_1.0");
42      }
43  
44      protected RSS10Generator(String feedType) {
45          super(feedType);
46      }
47  
48      protected Namespace getFeedNamespace() {
49          return RSS_NS;
50      }
51  
52      protected void populateChannel(Channel channel,Element eChannel) {
53          super.populateChannel(channel,eChannel);
54          if (channel.getUri() != null) {
55              eChannel.setAttribute("about", channel.getUri(), getRDFNamespace());
56          }
57          List items = channel.getItems();
58          if (items.size()>0) {
59              Element eItems = new Element("items",getFeedNamespace());
60              Element eSeq = new Element("Seq",getRDFNamespace());
61              for (int i=0;i<items.size();i++) {
62                  Item item = (Item) items.get(i);
63                  Element eLi = new Element("li",getRDFNamespace());
64                  String link = item.getLink();
65                  if (link!=null) {
66                      eLi.setAttribute("resource",Integer.toString(i));
67                  }
68                  eSeq.addContent(eLi);
69              }
70              eItems.addContent(eSeq);
71              eChannel.addContent(eItems);
72          }
73      }
74  
75      protected void populateItem(Item item, Element eItem, int index) {
76          super.populateItem(item,eItem, index);
77          String link = item.getLink();
78          if (link!=null) {
79              eItem.setAttribute("about",Integer.toString(index),getRDFNamespace());
80          }
81          Description description = item.getDescription();
82          if (description!=null) {
83              eItem.addContent(generateSimpleElement("description",description.getValue()));
84          }
85      }
86  
87      protected void checkChannelConstraints(Element eChannel) throws FeedException {
88          checkNotNullAndLength(eChannel,"title", 0, -1);
89          checkNotNullAndLength(eChannel,"description", 0, -1);
90          checkNotNullAndLength(eChannel,"link", 0, -1);
91      }
92  
93      protected void checkImageConstraints(Element eImage) throws FeedException {
94          checkNotNullAndLength(eImage,"title", 0, -1);
95          checkNotNullAndLength(eImage,"url", 0, -1);
96          checkNotNullAndLength(eImage,"link", 0, -1);
97      }
98  
99      protected void checkTextInputConstraints(Element eTextInput) throws FeedException {
100         checkNotNullAndLength(eTextInput,"title", 0, -1);
101         checkNotNullAndLength(eTextInput,"description", 0, -1);
102         checkNotNullAndLength(eTextInput,"name", 0, -1);
103         checkNotNullAndLength(eTextInput,"link", 0, -1);
104     }
105 
106     protected void checkItemsConstraints(Element parent) throws FeedException {
107     }
108 
109     protected void checkItemConstraints(Element eItem) throws FeedException {
110         checkNotNullAndLength(eItem,"title", 0, -1);
111         checkNotNullAndLength(eItem,"link", 0, -1);
112     }
113 
114 }
115