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Java > Open Source Codes > com > sun > syndication > io > impl > RSS10Generator


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 JavaDoc;
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 JavaDoc 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 JavaDoc 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 JavaDoc 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 JavaDoc 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 JavaDoc 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
116
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