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1
26
28 package de.nava.informa.parsers;
29
30 import java.net.URL  ;
31 import java.util.Date ;
32 import java.util.Iterator ;
33 import java.util.List ;
34
35 import org.apache.commons.logging.Log;
36 import org.apache.commons.logging.LogFactory;
37 import org.jdom.Attribute;
38 import org.jdom.Element;
39
40 import de.nava.informa.core.ChannelBuilderIF;
41 import de.nava.informa.core.ChannelFormat;
42 import de.nava.informa.core.ChannelIF;
43 import de.nava.informa.core.ImageIF;
44 import de.nava.informa.core.ItemEnclosureIF;
45 import de.nava.informa.core.ItemIF;
46 import de.nava.informa.core.ItemSourceIF;
47 import de.nava.informa.core.ParseException;
48 import de.nava.informa.core.TextInputIF;
49 import de.nava.informa.utils.ParserUtils;
50
51
57 class RSS_0_91_Parser {
58
59 private static Log logger = LogFactory.getLog(RSS_0_91_Parser.class);
60
61 static ChannelIF parse(ChannelBuilderIF cBuilder, Element root)
62 throws ParseException {
63 if (cBuilder == null) {
64 throw new RuntimeException (
65 "Without builder no channel can " + "be created.");
66 }
67 Date dateParsed = new Date ();
68 logger.debug("start parsing.");
69
70 Element channel = root.getChild("channel");
72 if (channel == null) {
73 logger.warn("Channel element could not be retrieved from feed.");
74 throw new ParseException("No channel element found in feed.");
75 }
76
77
79 ChannelIF chnl =
81 cBuilder.createChannel(channel, channel.getChildTextTrim("title"));
82
83 chnl.setFormat(ChannelFormat.RSS_0_91);
84
85 chnl.setDescription(channel.getChildTextTrim("description"));
87
88 chnl.setSite(ParserUtils.getURL(channel.getChildTextTrim("link")));
90
91 chnl.setLanguage(channel.getChildTextTrim("language"));
93
94 List items = channel.getChildren("item");
96 Iterator i = items.iterator();
97 while (i.hasNext()) {
98 Element item = (Element) i.next();
99
100 Element elTitle = item.getChild("title");
102 String strTitle = "<No Title>";
103 if (elTitle != null) {
104 strTitle = elTitle.getTextTrim();
105 }
106 if (logger.isDebugEnabled()) {
107 logger.debug("Item element found (" + strTitle + ").");
108 }
109
110 Element elLink = item.getChild("link");
112 String strLink = "";
113 if (elLink != null) {
114 strLink = elLink.getTextTrim();
115 }
116
117 Element elDesc = item.getChild("description");
119 String strDesc = "";
120 if (elDesc != null) {
121 strDesc = elDesc.getTextTrim();
122 }
123
124 ItemIF rssItem =
126 cBuilder.createItem(
127 item,
128 chnl,
129 strTitle,
130 strDesc,
131 ParserUtils.getURL(strLink));
132 rssItem.setFound(dateParsed);
133
134 Element source = item.getChild("source");
136 if (source != null) {
137 String sourceName = source.getTextTrim();
138 Attribute sourceAttribute = source.getAttribute("url");
139 if (sourceAttribute != null) {
140 String location = sourceAttribute.getValue().trim();
141 ItemSourceIF itemSource =
142 cBuilder.createItemSource(rssItem, sourceName, location, null);
143 rssItem.setSource(itemSource);
144 }
145 }
146
147 Element enclosure = item.getChild("enclosure");
149 if (enclosure != null) {
150 URL location = null;
151 String type = null;
152 int length = -1;
153 Attribute urlAttribute = enclosure.getAttribute("url");
154 if (urlAttribute != null) {
155 location = ParserUtils.getURL(urlAttribute.getValue().trim());
156 }
157 Attribute typeAttribute = enclosure.getAttribute("type");
158 if (typeAttribute != null) {
159 type = typeAttribute.getValue().trim();
160 }
161 Attribute lengthAttribute = enclosure.getAttribute("length");
162 if (lengthAttribute != null) {
163 try {
164 length = Integer.parseInt(lengthAttribute.getValue().trim());
165 } catch (NumberFormatException e) {
166 logger.warn(e);
167 }
168 }
169 ItemEnclosureIF itemEnclosure =
170 cBuilder.createItemEnclosure(rssItem, location, type, length);
171 rssItem.setEnclosure(itemEnclosure);
172 }
173 }
174
175 Element image = channel.getChild("image");
177 if (image != null) {
178 ImageIF rssImage =
179 cBuilder.createImage(
180 image.getChildTextTrim("title"),
181 ParserUtils.getURL(image.getChildTextTrim("url")),
182 ParserUtils.getURL(image.getChildTextTrim("link")));
183 Element imgWidth = image.getChild("width");
184 if (imgWidth != null) {
185 try {
186 rssImage.setWidth(Integer.parseInt(imgWidth.getTextTrim()));
187 } catch (NumberFormatException e) {
188 logger.warn(e);
189 }
190 }
191 Element imgHeight = image.getChild("height");
192 if (imgHeight != null) {
193 try {
194 rssImage.setHeight(Integer.parseInt(imgHeight.getTextTrim()));
195 } catch (NumberFormatException e) {
196 logger.warn(e);
197 }
198 }
199 Element imgDescr = image.getChild("description");
200 if (imgDescr != null) {
201 rssImage.setDescription(imgDescr.getTextTrim());
202 }
203 chnl.setImage(rssImage);
204 }
205
206 Element txtinp = channel.getChild("textinput");
208 if (txtinp != null) {
209 TextInputIF rssTextInput =
210 cBuilder.createTextInput(
211 txtinp.getChild("title").getTextTrim(),
212 txtinp.getChild("description").getTextTrim(),
213 txtinp.getChild("name").getTextTrim(),
214 ParserUtils.getURL(txtinp.getChild("link").getTextTrim()));
215 chnl.setTextInput(rssTextInput);
216 }
217
218 Element copyright = channel.getChild("copyright");
220 if (copyright != null) {
221 chnl.setCopyright(copyright.getTextTrim());
222 }
223
224 Element rating = channel.getChild("rating");
226 if (rating != null) {
227 chnl.setRating(rating.getTextTrim());
228 }
229
230 Element pubDate = channel.getChild("pubDate");
232 if (pubDate != null) {
233 chnl.setPubDate(ParserUtils.getDate(pubDate.getTextTrim()));
234 }
235
236 Element lastBuildDate = channel.getChild("lastBuildDate");
238 if (lastBuildDate != null) {
239 chnl.setLastBuildDate(ParserUtils.getDate(lastBuildDate.getTextTrim()));
240 }
241
242 Element docs = channel.getChild("docs");
244 if (docs != null) {
245 chnl.setDocs(docs.getTextTrim());
246 }
247
248 Element managingEditor = channel.getChild("managingEditor");
250 if (managingEditor != null) {
251 chnl.setCreator(managingEditor.getTextTrim());
252 }
253
254 Element webMaster = channel.getChild("webMaster");
256 if (webMaster != null) {
257 chnl.setPublisher(webMaster.getTextTrim());
258 }
259
260 Element cloud = channel.getChild("cloud");
262 if (cloud != null) {
263 String _port = cloud.getAttributeValue("port");
264 int port = -1;
265 if (_port != null) {
266 try {
267 port = Integer.parseInt(_port);
268 } catch (NumberFormatException e) {
269 logger.warn(e);
270 }
271 }
272 chnl.setCloud(
273 cBuilder.createCloud(
274 cloud.getAttributeValue("domain"),
275 port,
276 cloud.getAttributeValue("path"),
277 cloud.getAttributeValue("registerProcedure"),
278 cloud.getAttributeValue("protocol")));
279 }
280
281 chnl.setLastUpdated(dateParsed);
282
285 return chnl;
286 }
287
288 }
289 |
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