Source Code Cross Referenced for Atom03Generator.java in  » RSS-RDF » Rome » com » sun » syndication » io » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » RSS RDF » Rome » com.sun.syndication.io.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2004 Sun Microsystems, Inc.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         *
016:         */
017:        package com.sun.syndication.io.impl;
018:
019:        import com.sun.syndication.feed.WireFeed;
020:        import com.sun.syndication.feed.atom.*;
021:        import com.sun.syndication.feed.synd.SyndPerson;
022:        import com.sun.syndication.io.FeedException;
023:        import org.jdom.Attribute;
024:        import org.jdom.Document;
025:        import org.jdom.Element;
026:        import org.jdom.Namespace;
027:        import org.jdom.input.SAXBuilder;
028:
029:        import java.io.StringReader;
030:        import java.util.List;
031:
032:        /**
033:         * Feed Generator for Atom
034:         * <p/>
035:         *
036:         * @author Elaine Chien
037:         *
038:         */
039:
040:        public class Atom03Generator extends BaseWireFeedGenerator {
041:            private static final String ATOM_03_URI = "http://purl.org/atom/ns#";
042:            private static final Namespace ATOM_NS = Namespace
043:                    .getNamespace(ATOM_03_URI);
044:
045:            private String _version;
046:
047:            public Atom03Generator() {
048:                this ("atom_0.3", "0.3");
049:            }
050:
051:            protected Atom03Generator(String type, String version) {
052:                super (type);
053:                _version = version;
054:            }
055:
056:            protected String getVersion() {
057:                return _version;
058:            }
059:
060:            protected Namespace getFeedNamespace() {
061:                return ATOM_NS;
062:            }
063:
064:            public Document generate(WireFeed wFeed) throws FeedException {
065:                Feed feed = (Feed) wFeed;
066:                Element root = createRootElement(feed);
067:                populateFeed(feed, root);
068:                return createDocument(root);
069:            }
070:
071:            protected Document createDocument(Element root) {
072:                return new Document(root);
073:            }
074:
075:            protected Element createRootElement(Feed feed) {
076:                Element root = new Element("feed", getFeedNamespace());
077:                root.addNamespaceDeclaration(getFeedNamespace());
078:                Attribute version = new Attribute("version", getVersion());
079:                root.setAttribute(version);
080:                generateModuleNamespaceDefs(root);
081:                return root;
082:            }
083:
084:            protected void populateFeed(Feed feed, Element parent)
085:                    throws FeedException {
086:                addFeed(feed, parent);
087:                addEntries(feed, parent);
088:            }
089:
090:            protected void addFeed(Feed feed, Element parent)
091:                    throws FeedException {
092:                Element eFeed = parent;
093:                populateFeedHeader(feed, eFeed);
094:                checkFeedHeaderConstraints(eFeed);
095:                generateFeedModules(feed.getModules(), eFeed);
096:                generateForeignMarkup(eFeed, (List) feed.getForeignMarkup());
097:            }
098:
099:            protected void addEntries(Feed feed, Element parent)
100:                    throws FeedException {
101:                List items = feed.getEntries();
102:                for (int i = 0; i < items.size(); i++) {
103:                    addEntry((Entry) items.get(i), parent);
104:                }
105:                checkEntriesConstraints(parent);
106:            }
107:
108:            protected void addEntry(Entry entry, Element parent)
109:                    throws FeedException {
110:                Element eEntry = new Element("entry", getFeedNamespace());
111:                populateEntry(entry, eEntry);
112:                checkEntryConstraints(eEntry);
113:                generateItemModules(entry.getModules(), eEntry);
114:                parent.addContent(eEntry);
115:            }
116:
117:            protected void populateFeedHeader(Feed feed, Element eFeed)
118:                    throws FeedException {
119:                if (feed.getTitle() != null) {
120:                    eFeed.addContent(generateSimpleElement("title", feed
121:                            .getTitle()));
122:                }
123:
124:                List links = feed.getAlternateLinks();
125:                for (int i = 0; i < links.size(); i++) {
126:                    eFeed.addContent(generateLinkElement((Link) links.get(i)));
127:                }
128:
129:                links = feed.getOtherLinks();
130:                for (int i = 0; i < links.size(); i++) {
131:                    eFeed.addContent(generateLinkElement((Link) links.get(i)));
132:                }
133:                if (feed.getAuthors() != null && feed.getAuthors().size() > 0) {
134:                    Element authorElement = new Element("author",
135:                            getFeedNamespace());
136:                    fillPersonElement(authorElement, (Person) feed.getAuthors()
137:                            .get(0));
138:                    eFeed.addContent(authorElement);
139:                }
140:
141:                List contributors = feed.getContributors();
142:                for (int i = 0; i < contributors.size(); i++) {
143:                    Element contributorElement = new Element("contributor",
144:                            getFeedNamespace());
145:                    fillPersonElement(contributorElement, (Person) contributors
146:                            .get(i));
147:                    eFeed.addContent(contributorElement);
148:                }
149:
150:                if (feed.getTagline() != null) {
151:                    Element taglineElement = new Element("tagline",
152:                            getFeedNamespace());
153:                    fillContentElement(taglineElement, feed.getTagline());
154:                    eFeed.addContent(taglineElement);
155:                }
156:
157:                if (feed.getId() != null) {
158:                    eFeed.addContent(generateSimpleElement("id", feed.getId()));
159:                }
160:
161:                if (feed.getGenerator() != null) {
162:                    eFeed.addContent(generateGeneratorElement(feed
163:                            .getGenerator()));
164:                }
165:
166:                if (feed.getCopyright() != null) {
167:                    eFeed.addContent(generateSimpleElement("copyright", feed
168:                            .getCopyright()));
169:                }
170:
171:                if (feed.getInfo() != null) {
172:                    Element infoElement = new Element("info",
173:                            getFeedNamespace());
174:                    fillContentElement(infoElement, feed.getInfo());
175:                    eFeed.addContent(infoElement);
176:                }
177:
178:                if (feed.getModified() != null) {
179:                    Element modifiedElement = new Element("modified",
180:                            getFeedNamespace());
181:                    modifiedElement.addContent(DateParser
182:                            .formatW3CDateTime(feed.getModified()));
183:                    eFeed.addContent(modifiedElement);
184:                }
185:            }
186:
187:            protected void populateEntry(Entry entry, Element eEntry)
188:                    throws FeedException {
189:                if (entry.getTitle() != null) {
190:                    eEntry.addContent(generateSimpleElement("title", entry
191:                            .getTitle()));
192:                }
193:                List links = entry.getAlternateLinks();
194:                for (int i = 0; i < links.size(); i++) {
195:                    eEntry.addContent(generateLinkElement((Link) links.get(i)));
196:                }
197:
198:                links = entry.getOtherLinks();
199:                for (int i = 0; i < links.size(); i++) {
200:                    eEntry.addContent(generateLinkElement((Link) links.get(i)));
201:                }
202:
203:                if (entry.getAuthors() != null && entry.getAuthors().size() > 0) {
204:                    Element authorElement = new Element("author",
205:                            getFeedNamespace());
206:                    fillPersonElement(authorElement, (Person) entry
207:                            .getAuthors().get(0));
208:                    eEntry.addContent(authorElement);
209:                }
210:
211:                List contributors = entry.getContributors();
212:                for (int i = 0; i < contributors.size(); i++) {
213:                    Element contributorElement = new Element("contributor",
214:                            getFeedNamespace());
215:                    fillPersonElement(contributorElement, (Person) contributors
216:                            .get(i));
217:                    eEntry.addContent(contributorElement);
218:                }
219:                if (entry.getId() != null) {
220:                    eEntry
221:                            .addContent(generateSimpleElement("id", entry
222:                                    .getId()));
223:                }
224:
225:                if (entry.getModified() != null) {
226:                    Element modifiedElement = new Element("modified",
227:                            getFeedNamespace());
228:                    modifiedElement.addContent(DateParser
229:                            .formatW3CDateTime(entry.getModified()));
230:                    eEntry.addContent(modifiedElement);
231:                }
232:
233:                if (entry.getIssued() != null) {
234:                    Element issuedElement = new Element("issued",
235:                            getFeedNamespace());
236:                    issuedElement.addContent(DateParser.formatW3CDateTime(entry
237:                            .getIssued()));
238:                    eEntry.addContent(issuedElement);
239:                }
240:
241:                if (entry.getCreated() != null) {
242:                    Element createdElement = new Element("created",
243:                            getFeedNamespace());
244:                    createdElement.addContent(DateParser
245:                            .formatW3CDateTime(entry.getCreated()));
246:                    eEntry.addContent(createdElement);
247:                }
248:
249:                if (entry.getSummary() != null) {
250:                    Element summaryElement = new Element("summary",
251:                            getFeedNamespace());
252:                    fillContentElement(summaryElement, entry.getSummary());
253:                    eEntry.addContent(summaryElement);
254:                }
255:
256:                List contents = entry.getContents();
257:                for (int i = 0; i < contents.size(); i++) {
258:                    Element contentElement = new Element("content",
259:                            getFeedNamespace());
260:                    fillContentElement(contentElement, (Content) contents
261:                            .get(i));
262:                    eEntry.addContent(contentElement);
263:                }
264:
265:                generateForeignMarkup(eEntry, (List) entry.getForeignMarkup());
266:            }
267:
268:            protected void checkFeedHeaderConstraints(Element eFeed)
269:                    throws FeedException {
270:            }
271:
272:            protected void checkEntriesConstraints(Element parent)
273:                    throws FeedException {
274:            }
275:
276:            protected void checkEntryConstraints(Element eEntry)
277:                    throws FeedException {
278:            }
279:
280:            protected Element generateLinkElement(Link link) {
281:                Element linkElement = new Element("link", getFeedNamespace());
282:
283:                if (link.getRel() != null) {
284:                    Attribute relAttribute = new Attribute("rel", link.getRel()
285:                            .toString());
286:                    linkElement.setAttribute(relAttribute);
287:                }
288:
289:                if (link.getType() != null) {
290:                    Attribute typeAttribute = new Attribute("type", link
291:                            .getType());
292:                    linkElement.setAttribute(typeAttribute);
293:                }
294:
295:                if (link.getHref() != null) {
296:                    Attribute hrefAttribute = new Attribute("href", link
297:                            .getHref());
298:                    linkElement.setAttribute(hrefAttribute);
299:                }
300:                return linkElement;
301:            }
302:
303:            protected void fillPersonElement(Element element, Person person) {
304:                if (person.getName() != null) {
305:                    element.addContent(generateSimpleElement("name", person
306:                            .getName()));
307:                }
308:                if (person.getUrl() != null) {
309:                    element.addContent(generateSimpleElement("url", person
310:                            .getUrl()));
311:                }
312:
313:                if (person.getEmail() != null) {
314:                    element.addContent(generateSimpleElement("email", person
315:                            .getEmail()));
316:                }
317:            }
318:
319:            protected Element generateTagLineElement(Content tagline) {
320:                Element taglineElement = new Element("tagline",
321:                        getFeedNamespace());
322:
323:                if (tagline.getType() != null) {
324:                    Attribute typeAttribute = new Attribute("type", tagline
325:                            .getType());
326:                    taglineElement.setAttribute(typeAttribute);
327:                }
328:
329:                if (tagline.getValue() != null) {
330:                    taglineElement.addContent(tagline.getValue());
331:                }
332:                return taglineElement;
333:            }
334:
335:            protected void fillContentElement(Element contentElement,
336:                    Content content) throws FeedException {
337:
338:                if (content.getType() != null) {
339:                    Attribute typeAttribute = new Attribute("type", content
340:                            .getType());
341:                    contentElement.setAttribute(typeAttribute);
342:                }
343:
344:                String mode = content.getMode();
345:                if (mode != null) {
346:                    Attribute modeAttribute = new Attribute("mode", content
347:                            .getMode().toString());
348:                    contentElement.setAttribute(modeAttribute);
349:                }
350:
351:                if (content.getValue() != null) {
352:
353:                    if (mode == null || mode.equals(Content.ESCAPED)) {
354:                        contentElement.addContent(content.getValue());
355:                    } else if (mode.equals(Content.BASE64)) {
356:                        contentElement.addContent(Base64.encode(content
357:                                .getValue()));
358:                    } else if (mode.equals(Content.XML)) {
359:
360:                        StringBuffer tmpDocString = new StringBuffer("<tmpdoc>");
361:                        tmpDocString.append(content.getValue());
362:                        tmpDocString.append("</tmpdoc>");
363:                        StringReader tmpDocReader = new StringReader(
364:                                tmpDocString.toString());
365:                        Document tmpDoc;
366:
367:                        try {
368:                            SAXBuilder saxBuilder = new SAXBuilder();
369:                            tmpDoc = saxBuilder.build(tmpDocReader);
370:                        } catch (Exception ex) {
371:                            throw new FeedException("Invalid XML", ex);
372:                        }
373:
374:                        List children = tmpDoc.getRootElement().removeContent();
375:                        contentElement.addContent(children);
376:                    }
377:                }
378:            }
379:
380:            protected Element generateGeneratorElement(Generator generator) {
381:                Element generatorElement = new Element("generator",
382:                        getFeedNamespace());
383:
384:                if (generator.getUrl() != null) {
385:                    Attribute urlAttribute = new Attribute("url", generator
386:                            .getUrl());
387:                    generatorElement.setAttribute(urlAttribute);
388:                }
389:
390:                if (generator.getVersion() != null) {
391:                    Attribute versionAttribute = new Attribute("version",
392:                            generator.getVersion());
393:                    generatorElement.setAttribute(versionAttribute);
394:                }
395:
396:                if (generator.getValue() != null) {
397:                    generatorElement.addContent(generator.getValue());
398:                }
399:
400:                return generatorElement;
401:
402:            }
403:
404:            protected Element generateSimpleElement(String name, String value) {
405:                Element element = new Element(name, getFeedNamespace());
406:                element.addContent(value);
407:                return element;
408:            }
409:
410:        }
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