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26
27
29 package de.nava.informa.impl.basic;
30
31 import java.net.URL  ;
32 import java.util.ArrayList ;
33 import java.util.Collection ;
34 import java.util.Date ;
35 import java.util.HashMap ;
36 import java.util.Iterator ;
37 import java.util.Map ;
38
39 import org.jdom.Element;
40
41 import de.nava.informa.core.CategoryIF;
42 import de.nava.informa.core.ChannelFormat;
43 import de.nava.informa.core.ChannelIF;
44 import de.nava.informa.core.ChannelObserverIF;
45 import de.nava.informa.core.CloudIF;
46 import de.nava.informa.core.ImageIF;
47 import de.nava.informa.core.ItemIF;
48 import de.nava.informa.core.TextInputIF;
49 import de.nava.informa.utils.XmlPathUtils;
50
51
56 public class Channel implements ChannelIF, java.io.Serializable {
57
58 private long id;
59 private String title;
60 private String description;
61 private URL location;
62 private URL site;
63 private String creator;
64 private String publisher;
65 private String language;
66 private ChannelFormat format;
67 private Map items;
68 private ImageIF image;
69 private CloudIF cloud;
70 private TextInputIF textInput;
71 private String copyright;
72 private Collection categories;
73 private Date lastUpdated;
74 private Date lastBuild;
75 private Date pubDate;
76 private String rating;
77 private String generator;
78 private String docs;
79 private int ttl = -1;
80 private Element channelElement;
81
82 private String updatePeriod = null;
86 private int updateFrequency = -1;
87 private Date updateBase;
88
89 private static int hasLinkedMap = -1;
94
95 private static int hasLinkedHashMap = -1;
100
101 private transient Collection observers;
102
103 public Channel() {
104 this((String ) null);
105 }
106
107 public Channel(String title) {
108 this(null, title);
109 }
110
111 public Channel(Element channelElement) {
112 this(channelElement, "Unnamed channel");
113 }
114
115 public Channel(Element channelElement, String title) {
116 this.id = IdGenerator.getInstance().getId();
117 this.channelElement = channelElement;
118 this.title = title;
119 this.items = getMap();
120 this.categories = new ArrayList ();
121 this.observers = new ArrayList ();
122 this.format = ChannelFormat.UNKNOWN_CHANNEL_FORMAT;
123 this.lastUpdated = new Date ();
124 }
125
126
130 public long getId() {
131 return id;
132 }
133
134 public void setId(long id) {
135 this.id = id;
136 }
137
138 public String getTitle() {
139 return title;
140 }
141
142 public void setTitle(String title) {
143 this.title = title;
144 }
145
146 public String getDescription() {
147 return description;
148 }
149
150 public void setDescription(String description) {
151 this.description = description;
152 }
153
154 public URL getLocation() {
155 return location;
156 }
157
158 public void setLocation(URL location) {
159 this.location = location;
160 }
161
162 public URL getSite() {
163 return site;
164 }
165
166 public void setSite(URL site) {
167 this.site = site;
168 }
169
170 public String getCreator() {
171 return creator;
172 }
173
174 public void setCreator(String creator) {
175 this.creator = creator;
176 }
177
178 public String getPublisher() {
179 return publisher;
180 }
181
182 public void setPublisher(String publisher) {
183 this.publisher = publisher;
184 }
185
186 public String getLanguage() {
187 return language;
188 }
189
190 public void setLanguage(String language) {
191 this.language = language;
192 }
193
194 public String getRating() {
195 return rating;
196 }
197
198 public void setRating(String rating) {
199 this.rating = rating;
200 }
201
202 public CloudIF getCloud() {
203 return cloud;
204 }
205
206 public void setCloud(CloudIF cloud) {
207 this.cloud = cloud;
208 }
209
210 public String getGenerator() {
211 return generator;
212 }
213
214 public void setGenerator(String generator) {
215 this.generator = generator;
216 }
217
218 public String getDocs() {
219 return docs;
220 }
221
222 public void setDocs(String docs) {
223 this.docs = docs;
224 }
225
226 public int getTtl() {
227 return ttl;
228 }
229
230 public void setTtl(int ttl) {
231 this.ttl = ttl;
232 }
233
234 public ChannelFormat getFormat() {
235 return format;
236 }
237
238 public void setFormat(ChannelFormat format) {
239 this.format = format;
240 }
241
242 public Collection getItems() {
243 return items.values();
244 }
245
246 public void addItem(ItemIF item) {
247 items.put(new Long (item.getId()), item);
248 item.setChannel(this);
249 notifyObserversItemAdded(item);
250 }
251
252 public void removeItem(ItemIF item) {
253 items.remove(new Long (item.getId()));
254 }
255
256 public ItemIF getItem(long anId) {
257 return (ItemIF) items.get(new Long (anId));
258 }
259
260 public ImageIF getImage() {
261 return image;
262 }
263
264 public void setImage(ImageIF image) {
265 this.image = image;
266 }
267
268 public TextInputIF getTextInput() {
269 return textInput;
270 }
271
272 public void setTextInput(TextInputIF textInput) {
273 this.textInput = textInput;
274 }
275
276 public String getCopyright() {
277 return copyright;
278 }
279
280 public void setCopyright(String copyright) {
281 this.copyright = copyright;
282 }
283
284 public Collection getCategories() {
285 return categories;
286 }
287
288 public void setCategories(Collection categories) {
289 this.categories = categories;
290 }
291
292 public void addCategory(CategoryIF category) {
293 categories.add(category);
294 }
295
296 public void removeCategory(CategoryIF category) {
297 categories.remove(category);
298 }
299
300 public Date getLastUpdated() {
301 return lastUpdated;
302 }
303
304 public void setLastUpdated(Date lastUpdated) {
305 this.lastUpdated = lastUpdated;
306 notifyObserversChannelUpdated();
307 }
308
309 public Date getLastBuildDate() {
310 return lastBuild;
311 }
312
313 public void setLastBuildDate(Date date) {
314 this.lastBuild = date;
315 }
316
317 public Date getPubDate() {
318 return pubDate;
319 }
320
321 public void setPubDate(Date pubDate) {
322 this.pubDate = pubDate;
323 }
324
325
333 public void setAllProperties(ChannelIF sourceChan) {
334 setTitle(sourceChan.getTitle());
335 setDescription(sourceChan.getDescription());
336 setSite(sourceChan.getSite());
337 setCreator(sourceChan.getCreator());
338 setCopyright(sourceChan.getCopyright());
339 setPublisher(sourceChan.getPublisher());
340 setLanguage(sourceChan.getLanguage());
341 setImage(sourceChan.getImage());
342 setTextInput(sourceChan.getTextInput());
343 setRating(sourceChan.getRating());
344 setGenerator(sourceChan.getGenerator());
345 setDocs(sourceChan.getDocs());
346 setTtl(sourceChan.getTtl());
347 setCloud(sourceChan.getCloud());
348 setLastBuildDate(sourceChan.getLastBuildDate());
349 setUpdateBase(sourceChan.getUpdateBase());
350 setUpdateFrequency(sourceChan.getUpdateFrequency());
351 setUpdatePeriod(sourceChan.getUpdatePeriod());
352 setPubDate(sourceChan.getPubDate());
353 }
354
355
356
358 public String getUpdatePeriod() {
359 return updatePeriod;
360 }
361
362 public void setUpdatePeriod(String updatePeriod) {
363 this.updatePeriod = updatePeriod;
364 }
365
366 public int getUpdateFrequency() {
367 return updateFrequency;
368 }
369
370 public void setUpdateFrequency(int updateFrequency) {
371 this.updateFrequency = updateFrequency;
372 }
373
374 public Date getUpdateBase() {
375 return updateBase;
376 }
377
378 public void setUpdateBase(Date updateBase) {
379 this.updateBase = updateBase;
380 }
381
382 public String getElementValue(final String path) {
383 return XmlPathUtils.getElementValue(channelElement, path);
384 }
385
386 public String [] getElementValues(final String path, final String [] elements) {
387 return XmlPathUtils.getElementValues(channelElement, path, elements);
388 }
389
390 public String getAttributeValue(final String path, final String attribute) {
391 return XmlPathUtils.getAttributeValue(channelElement, path, attribute);
392 }
393
394 public String [] getAttributeValues(final String path, final String [] attributes) {
395 return XmlPathUtils.getAttributeValues(channelElement, path, attributes);
396 }
397
398
402 public void addObserver(ChannelObserverIF o) {
403 observers.add(o);
404 }
405
406 public void removeObserver(ChannelObserverIF o) {
407 observers.remove(o);
408 }
409
410
414
424 public boolean equals(Object obj) {
425 if (!(obj instanceof ChannelIF)) {
426 return false;
427 }
428 ChannelIF cmp = (ChannelIF) obj;
429
430 boolean te;
431 if (title != null) {
432 te = title.equals(cmp.getTitle());
433 } else {
434 te = (cmp.getTitle() == null);
435 }
436 boolean de;
437 if (description != null) {
438 de = description.equals(cmp.getDescription());
439 } else {
440 de = (cmp.getDescription() == null);
441 }
442 boolean le;
443 if (location != null) {
444 le = location.toString().equals(cmp.getLocation().toString());
448 } else {
449 le = (cmp.getLocation() == null);
450 }
451
452 return (te && de && le);
453 }
454
455
462 public int hashCode() {
463 StringBuffer sb = new StringBuffer (64);
464 sb.append(title).append(description).append(location);
465 return sb.toString().hashCode();
466 }
467
468
473 public String toString() {
474 return "[Basic Channel (" + id + "): " + title
475 + " (" + location + " )]";
476 }
477
478
482
487 private void notifyObserversItemAdded(ItemIF newItem) {
488 Iterator it = observers.iterator();
489 while (it.hasNext()) {
490 ChannelObserverIF o = (ChannelObserverIF) it.next();
491 o.itemAdded(newItem);
492 }
493 }
494
495
499 private void notifyObserversChannelUpdated() {
500 Iterator it = observers.iterator();
501 while (it.hasNext()) {
502 ChannelObserverIF o = (ChannelObserverIF) it.next();
503 o.channelRetrieved(this);
504 }
505 }
506
507
511 private static Map getMap() {
512 if (checkLinkedMap3()) {
513 return CommonsCollections3MapFactory.getLinkedMap();
514 } else if (checkLinkedHashMap()) {
515 return JDK14MapFactory.getLinkedHashMap();
516 } else {
517 return new HashMap ();
518 }
519 }
520
521
524 private static boolean checkLinkedMap3() {
525 if (hasLinkedMap == -1) {
526 try {
527 Class.forName("org.apache.commons.collections.map.LinkedMap");
528 hasLinkedMap = 1;
529 } catch (ClassNotFoundException e) {
530 hasLinkedMap = 0;
531 }
532 }
533 return (hasLinkedMap == 1);
534 }
535
536
540 private static final class JDK14MapFactory {
541
542 private JDK14MapFactory() {
543 }
544
545 static Map getLinkedHashMap() {
546 return new java.util.LinkedHashMap ();
547 }
548 }
549
550
553 private static boolean checkLinkedHashMap() {
554 if (hasLinkedHashMap == -1) {
555 try {
556 Class.forName("java.util.LinkedHashMap");
557 hasLinkedHashMap = 1;
558 } catch (ClassNotFoundException e) {
559 hasLinkedHashMap = 0;
560 }
561 }
562 return (hasLinkedHashMap == 1);
563 }
564
565
569 private static final class CommonsCollections3MapFactory {
570
571 private CommonsCollections3MapFactory() {
572 }
573
574 static Map getLinkedMap() {
575 return new org.apache.commons.collections.map.LinkedMap();
576 }
577 }
578 }
579 |
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