Source Code Cross Referenced for DefaultLayoutFactory.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » portal » layout » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.portal.layout.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.cocoon.portal.layout.impl;
018:
019:        import java.util.ArrayList;
020:        import java.util.HashMap;
021:        import java.util.Iterator;
022:        import java.util.List;
023:        import java.util.Map;
024:
025:        import org.apache.avalon.framework.CascadingRuntimeException;
026:        import org.apache.avalon.framework.activity.Disposable;
027:        import org.apache.avalon.framework.activity.Initializable;
028:        import org.apache.avalon.framework.component.Component;
029:        import org.apache.avalon.framework.configuration.Configurable;
030:        import org.apache.avalon.framework.configuration.Configuration;
031:        import org.apache.avalon.framework.configuration.ConfigurationException;
032:        import org.apache.avalon.framework.logger.AbstractLogEnabled;
033:        import org.apache.avalon.framework.service.ServiceException;
034:        import org.apache.avalon.framework.service.ServiceManager;
035:        import org.apache.avalon.framework.service.ServiceSelector;
036:        import org.apache.avalon.framework.service.Serviceable;
037:        import org.apache.avalon.framework.thread.ThreadSafe;
038:        import org.apache.cocoon.ProcessingException;
039:        import org.apache.cocoon.portal.PortalComponentManager;
040:        import org.apache.cocoon.portal.PortalService;
041:        import org.apache.cocoon.portal.aspect.AspectDataHandler;
042:        import org.apache.cocoon.portal.aspect.AspectDataStore;
043:        import org.apache.cocoon.portal.aspect.AspectDescription;
044:        import org.apache.cocoon.portal.aspect.impl.DefaultAspectDataHandler;
045:        import org.apache.cocoon.portal.aspect.impl.DefaultAspectDescription;
046:        import org.apache.cocoon.portal.coplet.CopletFactory;
047:        import org.apache.cocoon.portal.event.Event;
048:        import org.apache.cocoon.portal.event.EventManager;
049:        import org.apache.cocoon.portal.event.LayoutEvent;
050:        import org.apache.cocoon.portal.event.Receiver;
051:        import org.apache.cocoon.portal.event.impl.FullScreenCopletEvent;
052:        import org.apache.cocoon.portal.event.impl.LayoutRemoveEvent;
053:        import org.apache.cocoon.portal.layout.CompositeLayout;
054:        import org.apache.cocoon.portal.layout.Item;
055:        import org.apache.cocoon.portal.layout.Layout;
056:        import org.apache.cocoon.portal.layout.LayoutFactory;
057:        import org.apache.cocoon.portal.layout.renderer.Renderer;
058:        import org.apache.cocoon.portal.profile.ProfileManager;
059:        import org.apache.cocoon.util.ClassUtils;
060:
061:        /**
062:         *
063:         * <h2>Configuration</h2>
064:         * <table><tbody>
065:         *  <tr><th>layouts</th>
066:         *      <td>List of layouts.</td>
067:         *      <td>req</td>
068:         *      <td>Configuration</td>
069:         *      <td><code>null</code></td>
070:         * </tr>
071:         * <tr>
072:         *   <th>layouts/layout</th>
073:         *   <td>Multiple configured layouts.
074:         *   </td>
075:         *   <td>req</td>
076:         *   <td>Configuration</td>
077:         *   <td><code>null</code></td>
078:         *  </tr>
079:         * <tr>
080:         *   <th>layouts/layout/attribute::name</th>
081:         *   <td>Unique layout name.</td>
082:         *   <td>req</td>
083:         *   <td>String</td>
084:         *   <td><code>null</code></td>
085:         *  </tr>
086:         * <tr>
087:         *   <th>layouts/layout/attribute::create-id</th>
088:         *   <td></td>
089:         *   <td></td>
090:         *   <td>boolean</td>
091:         *   <td><code>false</code></td>
092:         *  </tr>
093:         * <tr>
094:         *   <th>layouts/layout/renderers/attribute::default</th>
095:         *   <td></td>
096:         *   <td>req</td>
097:         *   <td>String</td>
098:         *   <td><code>null</code></td>
099:         *  </tr>
100:         * <tr>
101:         *   <th>layouts/layout/renderers/renderer</th>
102:         *   <td></td>
103:         *   <td>req</td>
104:         *   <td>Configuration</td>
105:         *   <td><code>null</code></td>
106:         *  </tr>
107:         * <tr>
108:         *   <th>layouts/layout/renderers/renderer/attribute::name</th>
109:         *   <td></td>
110:         *   <td>req</td>
111:         *   <td>String</td>
112:         *   <td><code>null</code></td>
113:         *  </tr>
114:         * <tr>
115:         *   <th>layouts/layout/aspects/aspect</th>
116:         *   <td></td>
117:         *   <td>req</td>
118:         *   <td>String</td>
119:         *   <td><code>null</code></td>
120:         *  </tr>
121:         * </tbody></table>
122:         *
123:         * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
124:         * @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
125:         * 
126:         * @version CVS $Id: DefaultLayoutFactory.java 433543 2006-08-22 06:22:54Z crossley $
127:         */
128:        public class DefaultLayoutFactory extends AbstractLogEnabled implements 
129:                ThreadSafe, Component, LayoutFactory, Configurable, Disposable,
130:                Serviceable, Initializable, Receiver {
131:
132:            protected Map layouts = new HashMap();
133:
134:            protected List descriptions = new ArrayList();
135:
136:            protected ServiceSelector storeSelector;
137:
138:            protected ServiceManager manager;
139:
140:            protected Configuration[] layoutsConf;
141:
142:            protected static long idCounter = System.currentTimeMillis();
143:
144:            /* (non-Javadoc)
145:             * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
146:             */
147:            public void service(ServiceManager manager) throws ServiceException {
148:                this .manager = manager;
149:                this .storeSelector = (ServiceSelector) this .manager
150:                        .lookup(AspectDataStore.ROLE + "Selector");
151:            }
152:
153:            /** 
154:             * Configure a layout
155:             */
156:            protected void configureLayout(Configuration layoutConf)
157:                    throws ConfigurationException {
158:                DefaultLayoutDescription desc = new DefaultLayoutDescription();
159:                final String name = layoutConf.getAttribute("name");
160:
161:                // unique test
162:                if (this .layouts.get(name) != null) {
163:                    throw new ConfigurationException(
164:                            "Layout name must be unique. Double definition for "
165:                                    + name);
166:                }
167:                desc.setName(name);
168:                desc.setClassName(layoutConf.getAttribute("class"));
169:                desc.setCreateId(layoutConf.getAttributeAsBoolean("create-id",
170:                        false));
171:                desc.setItemClassName(layoutConf.getAttribute("item-class",
172:                        null));
173:
174:                // the renderers
175:                final String defaultRenderer = layoutConf.getChild("renderers")
176:                        .getAttribute("default");
177:                desc.setDefaultRendererName(defaultRenderer);
178:
179:                final Configuration[] rendererConfs = layoutConf.getChild(
180:                        "renderers").getChildren("renderer");
181:                if (rendererConfs != null) {
182:                    boolean found = false;
183:                    for (int m = 0; m < rendererConfs.length; m++) {
184:                        final String rName = rendererConfs[m]
185:                                .getAttribute("name");
186:                        desc.addRendererName(rName);
187:                        if (defaultRenderer.equals(rName)) {
188:                            found = true;
189:                        }
190:                    }
191:                    if (!found) {
192:                        throw new ConfigurationException("Default renderer '"
193:                                + defaultRenderer
194:                                + "' is not configured for layout '" + name
195:                                + "'");
196:                    }
197:                } else {
198:                    throw new ConfigurationException("Default renderer '"
199:                            + defaultRenderer
200:                            + "' is not configured for layout '" + name + "'");
201:                }
202:
203:                // and now the aspects
204:                final Configuration[] aspectsConf = layoutConf.getChild(
205:                        "aspects").getChildren("aspect");
206:                if (aspectsConf != null) {
207:                    for (int m = 0; m < aspectsConf.length; m++) {
208:                        AspectDescription adesc = DefaultAspectDescription
209:                                .newInstance(aspectsConf[m]);
210:                        desc.addAspectDescription(adesc);
211:                    }
212:                }
213:                // now query all configured renderers for their aspects
214:                PortalService service = null;
215:                try {
216:                    service = (PortalService) this .manager
217:                            .lookup(PortalService.ROLE);
218:                    PortalComponentManager pcManager = service
219:                            .getComponentManager();
220:
221:                    Iterator rendererIterator = desc.getRendererNames();
222:                    while (rendererIterator.hasNext()) {
223:                        final String rendererName = (String) rendererIterator
224:                                .next();
225:                        Renderer renderer = pcManager.getRenderer(rendererName);
226:
227:                        Iterator aspectIterator = renderer
228:                                .getAspectDescriptions();
229:                        while (aspectIterator.hasNext()) {
230:                            final AspectDescription adesc = (AspectDescription) aspectIterator
231:                                    .next();
232:                            desc.addAspectDescription(adesc);
233:                        }
234:                    }
235:                } catch (ServiceException ce) {
236:                    throw new ConfigurationException(
237:                            "Unable to lookup renderer selector.", ce);
238:                } finally {
239:                    this .manager.release(service);
240:                }
241:
242:                // set the aspect data handler
243:                DefaultAspectDataHandler handler = new DefaultAspectDataHandler(
244:                        desc, this .storeSelector);
245:                this .layouts
246:                        .put(desc.getName(), new Object[] { desc, handler });
247:                this .descriptions.add(desc);
248:            }
249:
250:            /* (non-Javadoc)
251:             * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
252:             */
253:            public void configure(Configuration configuration)
254:                    throws ConfigurationException {
255:                this .layoutsConf = configuration.getChild("layouts")
256:                        .getChildren("layout");
257:            }
258:
259:            protected void init() {
260:                // FIXME when we switch to another container we can remove
261:                //        the lazy evaluation
262:                if (this .layoutsConf != null) {
263:                    synchronized (this ) {
264:                        if (this .layoutsConf != null) {
265:                            for (int i = 0; i < layoutsConf.length; i++) {
266:                                try {
267:                                    this .configureLayout(layoutsConf[i]);
268:                                } catch (ConfigurationException ce) {
269:                                    throw new CascadingRuntimeException(
270:                                            "Unable to configure layout.", ce);
271:                                }
272:                            }
273:                            this .layoutsConf = null;
274:                        }
275:                    }
276:                }
277:            }
278:
279:            /* (non-Javadoc)
280:             * @see org.apache.cocoon.portal.layout.LayoutFactory#prepareLayout(org.apache.cocoon.portal.layout.Layout)
281:             */
282:            public void prepareLayout(Layout layout) throws ProcessingException {
283:                if (layout != null) {
284:
285:                    this .init();
286:
287:                    final String layoutName = layout.getName();
288:                    if (layoutName == null) {
289:                        throw new ProcessingException("Layout '"
290:                                + layout.getId() + "' has no associated name.");
291:                    }
292:                    Object[] o = (Object[]) this .layouts.get(layoutName);
293:
294:                    if (o == null) {
295:                        throw new ProcessingException(
296:                                "LayoutDescription with name '" + layoutName
297:                                        + "' not found.");
298:                    }
299:                    DefaultLayoutDescription layoutDescription = (DefaultLayoutDescription) o[0];
300:
301:                    layout.setDescription(layoutDescription);
302:                    layout.setAspectDataHandler((AspectDataHandler) o[1]);
303:
304:                    // recursive
305:                    if (layout instanceof  CompositeLayout) {
306:                        CompositeLayout composite = (CompositeLayout) layout;
307:                        composite.setItemClassName(layoutDescription
308:                                .getItemClassName());
309:
310:                        Iterator items = composite.getItems().iterator();
311:                        while (items.hasNext()) {
312:                            this .prepareLayout(((Item) items.next())
313:                                    .getLayout());
314:                        }
315:                    }
316:                }
317:            }
318:
319:            /* (non-Javadoc)
320:             * @see org.apache.cocoon.portal.layout.LayoutFactory#newInstance(java.lang.String)
321:             */
322:            public Layout newInstance(String layoutName)
323:                    throws ProcessingException {
324:                this .init();
325:
326:                Object[] o = (Object[]) this .layouts.get(layoutName);
327:
328:                if (o == null) {
329:                    throw new ProcessingException(
330:                            "LayoutDescription with name '" + layoutName
331:                                    + "' not found.");
332:                }
333:                DefaultLayoutDescription layoutDescription = (DefaultLayoutDescription) o[0];
334:
335:                Layout layout = null;
336:                try {
337:                    Class clazz = ClassUtils.loadClass(layoutDescription
338:                            .getClassName());
339:                    layout = (Layout) clazz.newInstance();
340:
341:                } catch (Exception e) {
342:                    throw new ProcessingException(
343:                            "Unable to create new instance", e);
344:                }
345:
346:                String id = null;
347:                if (layoutDescription.createId()) {
348:                    synchronized (this ) {
349:                        id = layoutName + '_' + idCounter;
350:                        idCounter += 1;
351:                    }
352:                }
353:                layout.initialize(layoutName, id);
354:                layout.setDescription(layoutDescription);
355:                layout.setAspectDataHandler((AspectDataHandler) o[1]);
356:
357:                if (layout instanceof  CompositeLayout) {
358:                    CompositeLayout composite = (CompositeLayout) layout;
359:                    composite.setItemClassName(layoutDescription
360:                            .getItemClassName());
361:                }
362:
363:                PortalService service = null;
364:                try {
365:                    service = (PortalService) this .manager
366:                            .lookup(PortalService.ROLE);
367:                    service.getComponentManager().getProfileManager().register(
368:                            layout);
369:                } catch (ServiceException ce) {
370:                    throw new ProcessingException(
371:                            "Unable to lookup profile manager.", ce);
372:                } finally {
373:                    this .manager.release(service);
374:                }
375:                return layout;
376:            }
377:
378:            /* (non-Javadoc)
379:             * @see org.apache.cocoon.portal.layout.LayoutFactory#getLayoutDescriptions()
380:             */
381:            public List getLayoutDescriptions() {
382:                this .init();
383:                return this .descriptions;
384:            }
385:
386:            /* (non-Javadoc)
387:             * @see org.apache.avalon.framework.activity.Disposable#dispose()
388:             */
389:            public void dispose() {
390:                if (this .manager != null) {
391:                    EventManager eventManager = null;
392:                    try {
393:                        eventManager = (EventManager) this .manager
394:                                .lookup(EventManager.ROLE);
395:                        eventManager.unsubscribe(this );
396:                    } catch (Exception ignore) {
397:                        // ignore
398:                    } finally {
399:                        this .manager.release(eventManager);
400:                    }
401:                    this .manager.release(this .storeSelector);
402:                    this .storeSelector = null;
403:                    this .manager = null;
404:                }
405:
406:            }
407:
408:            /* (non-Javadoc)
409:             * @see org.apache.avalon.framework.activity.Initializable#initialize()
410:             */
411:            public void initialize() throws Exception {
412:                EventManager eventManager = null;
413:                try {
414:                    eventManager = (EventManager) this .manager
415:                            .lookup(EventManager.ROLE);
416:                    eventManager.subscribe(this );
417:                } finally {
418:                    this .manager.release(eventManager);
419:                }
420:            }
421:
422:            /**
423:             * @see Receiver
424:             */
425:            public void inform(LayoutEvent event, PortalService service) {
426:                Layout layout = (Layout) event.getTarget();
427:                if (event instanceof  LayoutRemoveEvent) {
428:                    try {
429:                        this .remove(layout);
430:                    } catch (ProcessingException pe) {
431:                        throw new CascadingRuntimeException(
432:                                "Exception during removal.", pe);
433:                    }
434:                }
435:            }
436:
437:            /* (non-Javadoc)
438:             * @see org.apache.cocoon.portal.layout.LayoutFactory#remove(org.apache.cocoon.portal.layout.Layout)
439:             */
440:            public void remove(Layout layout) throws ProcessingException {
441:                if (layout != null) {
442:                    this .init();
443:                    if (layout instanceof  CompositeLayout) {
444:                        final CompositeLayout cl = (CompositeLayout) layout;
445:                        while (cl.getItems().size() > 0) {
446:                            final Item i = cl.getItem(0);
447:                            this .remove(i.getLayout());
448:                        }
449:                    }
450:                    Item parent = layout.getParent();
451:                    if (parent != null && parent.getParent() != null) {
452:                        parent.getParent().removeItem(parent);
453:                    }
454:
455:                    PortalService service = null;
456:                    EventManager eventManager = null;
457:                    try {
458:                        service = (PortalService) this .manager
459:                                .lookup(PortalService.ROLE);
460:                        ProfileManager profileManager = service
461:                                .getComponentManager().getProfileManager();
462:                        if (layout instanceof  CopletLayout) {
463:                            // full screen?
464:                            if (layout.equals(service.getEntryLayout(null))) {
465:                                Event event = new FullScreenCopletEvent(
466:                                        ((CopletLayout) layout)
467:                                                .getCopletInstanceData(), null);
468:                                eventManager = (EventManager) this .manager
469:                                        .lookup(EventManager.ROLE);
470:                                eventManager.send(event);
471:                                service.getComponentManager().getLinkService()
472:                                        .addEventToLink(event);
473:                            }
474:                            CopletFactory factory = service
475:                                    .getComponentManager().getCopletFactory();
476:                            factory.remove(((CopletLayout) layout)
477:                                    .getCopletInstanceData());
478:                        }
479:                        profileManager.unregister(layout);
480:                    } catch (ServiceException ce) {
481:                        throw new ProcessingException(
482:                                "Unable to lookup portal service.", ce);
483:                    } finally {
484:                        this.manager.release(service);
485:                        this.manager.release(eventManager);
486:                    }
487:                }
488:            }
489:        }
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