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17 package com.sun.syndication.io.impl;
18
19 import com.sun.syndication.feed.WireFeed;
20 import com.sun.syndication.feed.atom.*;
21 import com.sun.syndication.io.FeedException;
22 import org.jdom.Attribute;
23 import org.jdom.Document;
24 import org.jdom.Element;
25 import org.jdom.Namespace;
26 import org.jdom.input.SAXBuilder;
27
28 import java.io.StringReader  ;
29 import java.util.List ;
30
31
38
39 public class Atom03Generator extends BaseWireFeedGenerator {
40 private static final String ATOM_URI = "http://purl.org/atom/ns#";
41 private static final Namespace ATOM_NS = Namespace.getNamespace(ATOM_URI);
42
43 private String _version;
44
45 public Atom03Generator() {
46 this("atom_0.3","0.3");
47 }
48
49 protected Atom03Generator(String type,String version) {
50 super(type);
51 _version = version;
52 }
53
54 protected String getVersion() {
55 return _version;
56 }
57
58 protected Namespace getFeedNamespace() {
59 return ATOM_NS;
60 }
61
62 public Document generate(WireFeed wFeed) throws FeedException {
63 Feed feed = (Feed) wFeed;
64 Element root = createRootElement(feed);
65 populateFeed(feed,root);
66 return createDocument(root);
67 }
68
69 protected Document createDocument(Element root) {
70 return new Document(root);
71 }
72
73 protected Element createRootElement(Feed feed) {
74 Element root = new Element("feed",getFeedNamespace());
75 root.addNamespaceDeclaration(getFeedNamespace());
76 Attribute version = new Attribute("version", getVersion());
77 root.setAttribute(version);
78 generateModuleNamespaceDefs(root);
79 return root;
80 }
81
82 protected void populateFeed(Feed feed,Element parent) throws FeedException {
83 addFeed(feed,parent);
84 addEntries(feed,parent);
85 }
86
87 protected void addFeed(Feed feed,Element parent) throws FeedException {
88 Element eFeed = parent;
89 populateFeedHeader(feed,eFeed);
90 checkFeedHeaderConstraints(eFeed);
91 generateFeedModules(feed.getModules(),eFeed);
92 }
93
94 protected void addEntries(Feed feed,Element parent) throws FeedException {
95 List items = feed.getEntries();
96 for (int i=0;i<items.size();i++) {
97 addEntry((Entry)items.get(i),parent);
98 }
99 checkEntriesConstraints(parent);
100 }
101
102 protected void addEntry(Entry entry,Element parent) throws FeedException {
103 Element eEntry = new Element("entry", getFeedNamespace());
104 populateEntry(entry,eEntry);
105 checkEntryConstraints(eEntry);
106 generateItemModules(entry.getModules(),eEntry);
107 parent.addContent(eEntry);
108 }
109
110 protected void populateFeedHeader(Feed feed,Element eFeed) throws FeedException {
111 if (feed.getTitle() != null) {
112 eFeed.addContent(generateSimpleElement("title", feed.getTitle()));
113 }
114
115 List links = feed.getAlternateLinks();
116 for (int i = 0; i < links.size(); i++) {
117 eFeed.addContent(generateLinkElement((Link)links.get(i)));
118 }
119
120 links = feed.getOtherLinks();
121 for (int i = 0; i < links.size(); i++) {
122 eFeed.addContent(generateLinkElement((Link)links.get(i)));
123 }
124
125 if (feed.getAuthor() != null) {
126 Element authorElement = new Element("author", getFeedNamespace());
127 fillPersonElement(authorElement, feed.getAuthor());
128 eFeed.addContent(authorElement);
129 }
130
131 List contributors = feed.getContributors();
132 for (int i = 0; i < contributors.size(); i++) {
133 Element contributorElement = new Element("contributor", getFeedNamespace());
134 fillPersonElement(contributorElement, (Person)contributors.get(i));
135 eFeed.addContent(contributorElement);
136 }
137
138 if (feed.getTagline() != null) {
139 Element taglineElement = new Element("tagline", getFeedNamespace());
140 fillContentElement(taglineElement, feed.getTagline());
141 eFeed.addContent(taglineElement);
142 }
143
144 if (feed.getId() != null) {
145 eFeed.addContent(generateSimpleElement("id", feed.getId()));
146 }
147
148 if (feed.getGenerator() != null) {
149 eFeed.addContent(generateGeneratorElement(feed.getGenerator()));
150 }
151
152 if (feed.getCopyright() != null) {
153 eFeed.addContent(generateSimpleElement("copyright", feed.getCopyright()));
154 }
155
156 if (feed.getInfo() != null) {
157 Element infoElement = new Element("info", getFeedNamespace());
158 fillContentElement(infoElement, feed.getInfo());
159 eFeed.addContent(infoElement);
160 }
161
162 if (feed.getModified() != null) {
163 Element modifiedElement = new Element("modified", getFeedNamespace());
164 modifiedElement.addContent(DateParser.formatW3CDateTime(feed.getModified()));
165 eFeed.addContent(modifiedElement);
166 }
167 }
168
169 protected void populateEntry(Entry entry,Element eEntry) throws FeedException {
170 if (entry.getTitle() != null) {
171 eEntry.addContent(generateSimpleElement("title", entry.getTitle()));
172 }
173 List links = entry.getAlternateLinks();
174 for (int i = 0; i < links.size(); i++) {
175 eEntry.addContent(generateLinkElement((Link)links.get(i)));
176 }
177
178 links = entry.getOtherLinks();
179 for (int i = 0; i < links.size(); i++) {
180 eEntry.addContent(generateLinkElement((Link)links.get(i)));
181 }
182
183 if (entry.getAuthor() != null) {
184 Element authorElement = new Element("author", getFeedNamespace());
185 fillPersonElement(authorElement, entry.getAuthor());
186 eEntry.addContent(authorElement);
187 }
188
189 List contributors = entry.getContributors();
190 for (int i = 0; i < contributors.size(); i++) {
191 Element contributorElement = new Element("contributor", getFeedNamespace());
192 fillPersonElement(contributorElement, (Person)contributors.get(i));
193 eEntry.addContent(contributorElement);
194 }
195 if (entry.getId() != null) {
196 eEntry.addContent(generateSimpleElement("id", entry.getId()));
197 }
198
199 if (entry.getModified() != null) {
200 Element modifiedElement = new Element("modified", getFeedNamespace());
201 modifiedElement.addContent(DateParser.formatW3CDateTime(entry.getModified()));
202 eEntry.addContent(modifiedElement);
203 }
204
205 if (entry.getIssued() != null) {
206 Element issuedElement = new Element("issued", getFeedNamespace());
207 issuedElement.addContent(DateParser.formatW3CDateTime(entry.getIssued()));
208 eEntry.addContent(issuedElement);
209 }
210
211 if (entry.getCreated() != null) {
212 Element createdElement = new Element("created", getFeedNamespace());
213 createdElement.addContent(DateParser.formatW3CDateTime(entry.getCreated()));
214 eEntry.addContent(createdElement);
215 }
216
217 if (entry.getSummary() != null) {
218 Element summaryElement = new Element("summary", getFeedNamespace());
219 fillContentElement(summaryElement, entry.getSummary());
220 eEntry.addContent(summaryElement);
221 }
222
223 List contents = entry.getContents();
224 for (int i = 0; i < contents.size(); i++) {
225 Element contentElement = new Element("content", getFeedNamespace());
226 fillContentElement(contentElement, (Content)contents.get(i));
227 eEntry.addContent(contentElement);
228 }
229 }
230
231 protected void checkFeedHeaderConstraints(Element eFeed) throws FeedException {
232 }
233
234 protected void checkEntriesConstraints(Element parent) throws FeedException {
235 }
236
237 protected void checkEntryConstraints(Element eEntry) throws FeedException {
238 }
239
240
241 protected Element generateLinkElement(Link link) {
242 Element linkElement = new Element("link", getFeedNamespace());
243
244 if (link.getRel() != null) {
245 Attribute relAttribute = new Attribute("rel", link.getRel().toString());
246 linkElement.setAttribute(relAttribute);
247 }
248
249 if (link.getType() != null) {
250 Attribute typeAttribute = new Attribute("type", link.getType());
251 linkElement.setAttribute(typeAttribute);
252 }
253
254 if (link.getHref() != null) {
255 Attribute hrefAttribute = new Attribute("href", link.getHref());
256 linkElement.setAttribute(hrefAttribute);
257 }
258 return linkElement;
259 }
260
261
262 protected void fillPersonElement(Element element, Person person) {
263 if (person.getName() != null) {
264 element.addContent(generateSimpleElement("name", person.getName()));
265 }
266 if (person.getUrl() != null) {
267 element.addContent(generateSimpleElement("url", person.getUrl()));
268 }
269
270 if (person.getEmail() != null) {
271 element.addContent(generateSimpleElement("email", person.getEmail()));
272 }
273 }
274
275 protected Element generateTagLineElement(Content tagline) {
276 Element taglineElement = new Element("tagline", getFeedNamespace());
277
278 if (tagline.getType() != null) {
279 Attribute typeAttribute = new Attribute("type", tagline.getType());
280 taglineElement.setAttribute(typeAttribute);
281 }
282
283 if (tagline.getValue() != null) {
284 taglineElement.addContent(tagline.getValue());
285 }
286 return taglineElement;
287 }
288
289 protected void fillContentElement(Element contentElement, Content content)
290 throws FeedException {
291
292 if (content.getType() != null) {
293 Attribute typeAttribute = new Attribute("type", content.getType());
294 contentElement.setAttribute(typeAttribute);
295 }
296
297 String mode = content.getMode();
298 if (mode != null) {
299 Attribute modeAttribute = new Attribute("mode", content.getMode().toString());
300 contentElement.setAttribute(modeAttribute);
301 }
302
303 if (content.getValue() != null) {
304
305 if (mode == null || mode.equals(Content.ESCAPED)) {
306 contentElement.addContent(content.getValue());
307 } else if (mode.equals(Content.BASE64)) {
308 contentElement.addContent(Base64.encode(content.getValue()));
309 } else if (mode.equals(Content.XML)) {
310
311 StringBuffer tmpDocString = new StringBuffer ("<tmpdoc>");
312 tmpDocString.append(content.getValue());
313 tmpDocString.append("</tmpdoc>");
314 StringReader tmpDocReader = new StringReader (tmpDocString.toString());
315 Document tmpDoc;
316
317 try {
318 SAXBuilder saxBuilder = new SAXBuilder();
319 tmpDoc = saxBuilder.build(tmpDocReader);
320 }
321 catch (Exception ex) {
322 throw new FeedException("Invalid XML",ex);
323 }
324
325 List children = tmpDoc.getRootElement().removeContent();
326 contentElement.addContent(children);
327 }
328 }
329 }
330
331 protected Element generateGeneratorElement(Generator generator) {
332 Element generatorElement = new Element("generator", getFeedNamespace());
333
334 if (generator.getUrl() != null) {
335 Attribute urlAttribute = new Attribute("url", generator.getUrl());
336 generatorElement.setAttribute(urlAttribute);
337 }
338
339 if (generator.getVersion() != null) {
340 Attribute versionAttribute = new Attribute("version", generator.getVersion());
341 generatorElement.setAttribute(versionAttribute);
342 }
343
344 if (generator.getValue() != null) {
345 generatorElement.addContent(generator.getValue());
346 }
347
348 return generatorElement;
349
350 }
351
352 protected Element generateSimpleElement(String name, String value) {
353 Element element = new Element(name, getFeedNamespace());
354 element.addContent(value);
355 return element;
356 }
357
358 }
359 |
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