|
1
16 package org.apache.cocoon.portal.layout.impl;
17
18 import java.util.ArrayList  ;
19 import java.util.HashMap ;
20 import java.util.Iterator ;
21 import java.util.List ;
22 import java.util.Map ;
23
24 import org.apache.avalon.framework.CascadingRuntimeException;
25 import org.apache.avalon.framework.activity.Disposable;
26 import org.apache.avalon.framework.activity.Initializable;
27 import org.apache.avalon.framework.component.Component;
28 import org.apache.avalon.framework.configuration.Configurable;
29 import org.apache.avalon.framework.configuration.Configuration;
30 import org.apache.avalon.framework.configuration.ConfigurationException;
31 import org.apache.avalon.framework.logger.AbstractLogEnabled;
32 import org.apache.avalon.framework.service.ServiceException;
33 import org.apache.avalon.framework.service.ServiceManager;
34 import org.apache.avalon.framework.service.ServiceSelector;
35 import org.apache.avalon.framework.service.Serviceable;
36 import org.apache.avalon.framework.thread.ThreadSafe;
37 import org.apache.cocoon.ProcessingException;
38 import org.apache.cocoon.portal.PortalComponentManager;
39 import org.apache.cocoon.portal.PortalService;
40 import org.apache.cocoon.portal.aspect.AspectDataHandler;
41 import org.apache.cocoon.portal.aspect.AspectDataStore;
42 import org.apache.cocoon.portal.aspect.AspectDescription;
43 import org.apache.cocoon.portal.aspect.impl.DefaultAspectDataHandler;
44 import org.apache.cocoon.portal.aspect.impl.DefaultAspectDescription;
45 import org.apache.cocoon.portal.coplet.CopletFactory;
46 import org.apache.cocoon.portal.event.Event;
47 import org.apache.cocoon.portal.event.EventManager;
48 import org.apache.cocoon.portal.event.LayoutEvent;
49 import org.apache.cocoon.portal.event.Receiver;
50 import org.apache.cocoon.portal.event.impl.FullScreenCopletEvent;
51 import org.apache.cocoon.portal.event.impl.LayoutRemoveEvent;
52 import org.apache.cocoon.portal.layout.CompositeLayout;
53 import org.apache.cocoon.portal.layout.Item;
54 import org.apache.cocoon.portal.layout.Layout;
55 import org.apache.cocoon.portal.layout.LayoutFactory;
56 import org.apache.cocoon.portal.layout.renderer.Renderer;
57 import org.apache.cocoon.portal.profile.ProfileManager;
58 import org.apache.cocoon.util.ClassUtils;
59
60
127 public class DefaultLayoutFactory
128 extends AbstractLogEnabled
129 implements ThreadSafe,
130 Component,
131 LayoutFactory,
132 Configurable,
133 Disposable,
134 Serviceable,
135 Initializable,
136 Receiver {
137
138 protected Map layouts = new HashMap ();
139
140 protected List descriptions = new ArrayList ();
141
142 protected ServiceSelector storeSelector;
143
144 protected ServiceManager manager;
145
146 protected Configuration[] layoutsConf;
147
148 protected static long idCounter = System.currentTimeMillis();
149
150
153 public void service(ServiceManager manager) throws ServiceException {
154 this.manager = manager;
155 this.storeSelector = (ServiceSelector)this.manager.lookup( AspectDataStore.ROLE+"Selector" );
156 }
157
158
161 protected void configureLayout(Configuration layoutConf)
162 throws ConfigurationException {
163 DefaultLayoutDescription desc = new DefaultLayoutDescription();
164 final String name = layoutConf.getAttribute("name");
165
166 if ( this.layouts.get(name) != null) {
168 throw new ConfigurationException("Layout name must be unique. Double definition for " + name);
169 }
170 desc.setName(name);
171 desc.setClassName(layoutConf.getAttribute("class"));
172 desc.setCreateId(layoutConf.getAttributeAsBoolean("create-id", false));
173 desc.setItemClassName(layoutConf.getAttribute("item-class", null));
174
175 final String defaultRenderer = layoutConf.getChild("renderers").getAttribute("default");
177 desc.setDefaultRendererName(defaultRenderer);
178
179 final Configuration[] rendererConfs = layoutConf.getChild("renderers").getChildren("renderer");
180 if ( rendererConfs != null ) {
181 boolean found = false;
182 for(int m=0; m < rendererConfs.length; m++) {
183 final String rName = rendererConfs[m].getAttribute("name");
184 desc.addRendererName(rName);
185 if ( defaultRenderer.equals(rName) ) {
186 found = true;
187 }
188 }
189 if ( !found ) {
190 throw new ConfigurationException("Default renderer '" + defaultRenderer + "' is not configured for layout '" + name + "'");
191 }
192 } else {
193 throw new ConfigurationException("Default renderer '" + defaultRenderer + "' is not configured for layout '" + name + "'");
194 }
195
196 final Configuration[] aspectsConf = layoutConf.getChild("aspects").getChildren("aspect");
198 if (aspectsConf != null) {
199 for(int m=0; m < aspectsConf.length; m++) {
200 AspectDescription adesc = DefaultAspectDescription.newInstance(aspectsConf[m]);
201 desc.addAspectDescription( adesc );
202 }
203 }
204 PortalService service = null;
206 try {
207 service = (PortalService)this.manager.lookup(PortalService.ROLE);
208 PortalComponentManager pcManager = service.getComponentManager();
209
210 Iterator rendererIterator = desc.getRendererNames();
211 while (rendererIterator.hasNext()) {
212 final String rendererName = (String )rendererIterator.next();
213 Renderer renderer = pcManager.getRenderer( rendererName );
214
215 Iterator aspectIterator = renderer.getAspectDescriptions();
216 while (aspectIterator.hasNext()) {
217 final AspectDescription adesc = (AspectDescription) aspectIterator.next();
218 desc.addAspectDescription( adesc );
219 }
220 }
221 } catch (ServiceException ce ) {
222 throw new ConfigurationException("Unable to lookup renderer selector.", ce);
223 } finally {
224 this.manager.release( service );
225 }
226
227 DefaultAspectDataHandler handler = new DefaultAspectDataHandler(desc, this.storeSelector);
229 this.layouts.put(desc.getName(), new Object [] {desc, handler});
230 this.descriptions.add(desc);
231 }
232
233
236 public void configure(Configuration configuration)
237 throws ConfigurationException {
238 this.layoutsConf = configuration.getChild("layouts").getChildren("layout");
239 }
240
241 protected void init() {
242 if ( this.layoutsConf != null ) {
245 synchronized (this) {
246 if ( this.layoutsConf != null ) {
247 for(int i=0; i < layoutsConf.length; i++ ) {
248 try {
249 this.configureLayout( layoutsConf[i] );
250 } catch (ConfigurationException ce) {
251 throw new CascadingRuntimeException("Unable to configure layout.", ce);
252 }
253 }
254 this.layoutsConf = null;
255 }
256 }
257 }
258 }
259
260
263 public void prepareLayout(Layout layout)
264 throws ProcessingException {
265 if ( layout != null ) {
266
267 this.init();
268
269 final String layoutName = layout.getName();
270 if ( layoutName == null ) {
271 throw new ProcessingException("Layout '"+layout.getId()+"' has no associated name.");
272 }
273 Object [] o = (Object []) this.layouts.get( layoutName );
274
275 if ( o == null ) {
276 throw new ProcessingException("LayoutDescription with name '" + layoutName + "' not found.");
277 }
278 DefaultLayoutDescription layoutDescription = (DefaultLayoutDescription)o[0];
279
280 layout.setDescription( layoutDescription );
281 layout.setAspectDataHandler((AspectDataHandler)o[1]);
282
283 if ( layout instanceof CompositeLayout ) {
285 CompositeLayout composite = (CompositeLayout)layout;
286 composite.setItemClassName(layoutDescription.getItemClassName());
287
288 Iterator items = composite.getItems().iterator();
289 while ( items.hasNext() ) {
290 this.prepareLayout( ((Item)items.next()).getLayout() );
291 }
292 }
293 }
294 }
295
296
299 public Layout newInstance(String layoutName)
300 throws ProcessingException {
301 this.init();
302
303 Object [] o = (Object []) this.layouts.get( layoutName );
304
305 if ( o == null ) {
306 throw new ProcessingException("LayoutDescription with name '" + layoutName + "' not found.");
307 }
308 DefaultLayoutDescription layoutDescription = (DefaultLayoutDescription)o[0];
309
310 Layout layout = null;
311 try {
312 Class clazz = ClassUtils.loadClass( layoutDescription.getClassName() );
313 layout = (Layout)clazz.newInstance();
314
315 } catch (Exception e) {
316 throw new ProcessingException("Unable to create new instance", e );
317 }
318
319 String id = null;
320 if ( layoutDescription.createId() ) {
321 synchronized (this) {
322 id = layoutName + '-' + idCounter;
323 idCounter += 1;
324 }
325 }
326 layout.initialize( layoutName, id );
327 layout.setDescription( layoutDescription );
328 layout.setAspectDataHandler((AspectDataHandler)o[1]);
329
330 if ( layout instanceof CompositeLayout ) {
331 CompositeLayout composite = (CompositeLayout)layout;
332 composite.setItemClassName(layoutDescription.getItemClassName());
333 }
334
335 PortalService service = null;
336 try {
337 service = (PortalService)this.manager.lookup(PortalService.ROLE);
338 service.getComponentManager().getProfileManager().register(layout);
339 } catch (ServiceException ce) {
340 throw new ProcessingException("Unable to lookup profile manager.", ce);
341 } finally {
342 this.manager.release( service );
343 }
344 return layout;
345 }
346
347
350 public List getLayoutDescriptions() {
351 this.init();
352 return this.descriptions;
353 }
354
355
356
359 public void dispose() {
360 if ( this.manager != null ) {
361 EventManager eventManager = null;
362 try {
363 eventManager = (EventManager)this.manager.lookup(EventManager.ROLE);
364 eventManager.unsubscribe( this );
365 } catch (Exception ignore) {
366 } finally {
368 this.manager.release( eventManager );
369 }
370 this.manager.release( this.storeSelector );
371 this.storeSelector = null;
372 this.manager = null;
373 }
374
375 }
376
377
380 public void initialize() throws Exception {
381 EventManager eventManager = null;
382 try {
383 eventManager = (EventManager)this.manager.lookup(EventManager.ROLE);
384 eventManager.subscribe( this );
385 } finally {
386 this.manager.release( eventManager );
387 }
388 }
389
390
393 public void inform(LayoutEvent event, PortalService service) {
394 Layout layout = (Layout)event.getTarget();
395 if ( event instanceof LayoutRemoveEvent ) {
396 try {
397 this.remove( layout );
398 } catch (ProcessingException pe) {
399 throw new CascadingRuntimeException("Exception during removal.", pe);
400 }
401 }
402 }
403
404
407 public void remove(Layout layout)
408 throws ProcessingException {
409 if ( layout != null ) {
410 this.init();
411 if ( layout instanceof CompositeLayout ) {
412 final CompositeLayout cl = (CompositeLayout)layout;
413 while ( cl.getItems().size() > 0 ) {
414 final Item i = cl.getItem(0);
415 this.remove( i.getLayout() );
416 }
417 }
418 Item parent = layout.getParent();
419 if ( parent != null && parent.getParent() != null) {
420 parent.getParent().removeItem( parent );
421 }
422
423 PortalService service = null;
424 EventManager eventManager = null;
425 try {
426 service = (PortalService)this.manager.lookup(PortalService.ROLE);
427 ProfileManager profileManager = service.getComponentManager().getProfileManager();
428 if ( layout instanceof CopletLayout ) {
429 if ( layout.equals(service.getEntryLayout(null)) ) {
431 Event event = new FullScreenCopletEvent(((CopletLayout)layout).getCopletInstanceData(), null);
432 eventManager = (EventManager)this.manager.lookup(EventManager.ROLE);
433 eventManager.send(event);
434 service.getComponentManager().getLinkService().addEventToLink(event);
435 }
436 CopletFactory factory = service.getComponentManager().getCopletFactory();
437 factory.remove( ((CopletLayout)layout).getCopletInstanceData());
438 }
439 profileManager.unregister(layout);
440 } catch (ServiceException ce) {
441 throw new ProcessingException("Unable to lookup portal service.", ce);
442 } finally {
443 this.manager.release( service );
444 this.manager.release(eventManager);
445 }
446 }
447 }
448 }
449 |
Popular Tags |
Java API By Example, From Geeks To Geeks.