Source Code Cross Referenced for PrLegacyManager.java in  » ERP-CRM-Financial » sakai » org » sakaiproject » component » app » presentation » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » sakai » org.sakaiproject.component.app.presentation 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**********************************************************************************
002:         * $URL: https://source.sakaiproject.org/svn/presentation/tags/sakai_2-4-1/api-impl/src/java/org/sakaiproject/component/app/presentation/PrLegacyManager.java $
003:         * $Id: PrLegacyManager.java 8654 2006-05-02 01:40:40Z ggolden@umich.edu $
004:         ***********************************************************************************
005:         *
006:         * Copyright (c) 2004, 2005, 2006 The Sakai Foundation.
007:         * 
008:         * Licensed under the Educational Community License, Version 1.0 (the "License"); 
009:         * you may not use this file except in compliance with the License. 
010:         * You may obtain a copy of the License at
011:         * 
012:         *      http://www.opensource.org/licenses/ecl1.php
013:         * 
014:         * Unless required by applicable law or agreed to in writing, software 
015:         * distributed under the License is distributed on an "AS IS" BASIS, 
016:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
017:         * See the License for the specific language governing permissions and 
018:         * limitations under the License.
019:         *
020:         **********************************************************************************/package org.sakaiproject.component.app.presentation;
021:
022:        import java.util.Collections;
023:        import java.util.Hashtable;
024:        import java.util.List;
025:        import java.util.Vector;
026:        import java.util.logging.Logger;
027:
028:        import org.osid.id.IdManager;
029:        import org.osid.shared.Id;
030:        import org.sakaiproject.api.app.presentation.Presentation;
031:        import org.sakaiproject.api.app.presentation.Slide;
032:        import org.sakaiproject.content.api.ContentCollection;
033:        import org.sakaiproject.content.api.ContentCollectionEdit;
034:        import org.sakaiproject.content.cover.ContentHostingService;
035:        import org.sakaiproject.entity.api.Entity;
036:        import org.sakaiproject.entity.api.EntityPropertyNotDefinedException;
037:        import org.sakaiproject.entity.api.EntityPropertyTypeException;
038:        import org.sakaiproject.entity.api.ResourceProperties;
039:        import org.sakaiproject.entity.api.ResourcePropertiesEdit;
040:        import org.sakaiproject.exception.IdUnusedException;
041:        import org.sakaiproject.exception.InUseException;
042:        import org.sakaiproject.exception.PermissionException;
043:        import org.sakaiproject.exception.TypeException;
044:        import org.sakaiproject.time.api.Time;
045:        import org.sakaiproject.tool.cover.ToolManager;
046:
047:        /**
048:         *
049:         * @author  Mark Norton
050:         *
051:         *  The PresentationManager allows new presentations to be created and added.  It
052:         *  provides a means to list all known presentations via a PresentationIterator.
053:         */
054:        public class PrLegacyManager implements 
055:                org.sakaiproject.api.app.presentation.PresentationManager {
056:
057:            public static final String PROP_PRESENT_CURRENT_SLIDE = "Presentation:Current-Slide-Id";
058:
059:            /*  Service Dependency:  IdManager.  */
060:            protected IdManager idManager = null;
061:
062:            /*	Service Dependency:  Logger - eventually this will be the Sakai Logger.  */
063:            public static Logger logger = null;
064:
065:            /**
066:             * Dependency injection of IdManager.
067:             *
068:             *  @author Mark Norton
069:             */
070:            public IdManager getIdManager() {
071:                return this .idManager;
072:            }
073:
074:            public void setIdManager(IdManager im) {
075:                this .idManager = im;
076:            }
077:
078:            /** Clear out any cached presentations 
079:             * 
080:             * @author Charles Severance
081:             * 
082:             */
083:            public void clearPresentationCache() {
084:                // Not currently needed - there is no cache
085:                // System.out.println("Presentation cache cleared");
086:            }
087:
088:            /**
089:             * Substitute for getting a context.  This is the Site string.
090:             */
091:            private String getContext() {
092:                String retval = ToolManager.getCurrentPlacement().getContext();
093:                // System.out.println("Context="+retval);
094:                return retval;
095:            }
096:
097:            /**
098:             * Get the current "home" collection
099:             */
100:            private String getHomeCollection() {
101:                String retval = ContentHostingService
102:                        .getSiteCollection(getContext());
103:                // System.out.println("Home Collection = "+retval);
104:                return retval;
105:            }
106:
107:            public String getHomeReference() {
108:                String homeCollection = getHomeCollection();
109:                // System.out.println("Home Collection = "+homeCollection);
110:                if (homeCollection == null)
111:                    return null;
112:
113:                String refString = ContentHostingService
114:                        .getReference(homeCollection);
115:                // System.out.println("RefString="+refString);
116:                return refString;
117:            }
118:
119:            public String getReference(Presentation pres) {
120:                String presId = getPresentationIdString(pres);
121:                // System.out.println("Presentation Id = "+presId);
122:                if (presId == null)
123:                    return null;
124:
125:                String refString = ContentHostingService.getReference(presId);
126:                // System.out.println("RefString="+refString);
127:                return refString;
128:            }
129:
130:            /**
131:             * This is just a utility function to eat exceptions and do 
132:             * common error checking.
133:             */
134:            private String getPresentationIdString(Presentation pres) {
135:
136:                String presId = null;
137:                if (pres == null) {
138:                    // System.out.println("getPresentationIdString - Presentation is null!");
139:                    return null;
140:                }
141:
142:                try {
143:                    presId = pres.getId().getIdString();
144:                } catch (Throwable t) {
145:                    presId = null;
146:                }
147:                return presId;
148:            }
149:
150:            /**
151:             * Determine if the user is allowed to modify this presentation
152:             * 
153:             * @author	Charles Severance
154:             */
155:
156:            public boolean allowUpdate(Presentation pres) {
157:                boolean retval = false;
158:
159:                String presId = getPresentationIdString(pres);
160:                if (presId == null)
161:                    return false;
162:
163:                retval = ContentHostingService.allowUpdateCollection(presId);
164:
165:                // System.out.println("allowUpdate:"+presId+" returns "+retval);
166:                return retval;
167:            }
168:
169:            public String getTitle(Presentation pres) {
170:
171:                String retval = null;
172:                String presId = getPresentationIdString(pres);
173:                if (presId == null)
174:                    return retval;
175:
176:                try {
177:                    // System.out.println("getModificationDate:"+presId);
178:                    ContentCollection collection = ContentHostingService
179:                            .getCollection(presId);
180:
181:                    if (collection == null)
182:                        return null;
183:                    return getTitle(collection);
184:                } catch (IdUnusedException e) {
185:                    // System.out.println("IdUnusedException.");
186:                    return null;
187:                } catch (TypeException e) {
188:                    // System.out.println("TypeException.");
189:                    return null;
190:                } catch (PermissionException e) {
191:                    // System.out.println("PermissionException");
192:                    return null;
193:                }
194:            }
195:
196:            private String getTitle(ContentCollection collection) {
197:                String retval = null;
198:                if (collection == null)
199:                    return null;
200:
201:                ResourceProperties props = collection.getProperties();
202:                retval = props
203:                        .getProperty(ResourceProperties.PROP_DISPLAY_NAME);
204:                // System.out.println("Returning title "+retval);
205:                return retval;
206:            }
207:
208:            /**
209:             * Gets the modification time of the presentation - always goes through to the 
210:             * Content service so as to get the live values.
211:             * 
212:             * @param pres
213:             * @return
214:             */
215:            public Time getModificationTime(Presentation pres) {
216:
217:                Time retval = null;
218:                String presId = getPresentationIdString(pres);
219:                if (presId == null)
220:                    return retval;
221:
222:                try {
223:                    // System.out.println("getModificationDate:"+presId);
224:                    ContentCollection collection = ContentHostingService
225:                            .getCollection(presId);
226:
227:                    if (collection == null)
228:                        return null;
229:
230:                    ResourceProperties props = collection.getProperties();
231:                    retval = props
232:                            .getTimeProperty(ResourceProperties.PROP_MODIFIED_DATE);
233:                    // System.out.println("Returning "+retval);
234:                    return retval;
235:                } catch (EntityPropertyNotDefinedException e) {
236:                    // System.out.println("EntityPropertyNotDefinedException.");
237:                    return null;
238:                } catch (IdUnusedException e) {
239:                    // System.out.println("IdUnusedException.");
240:                    return null;
241:                } catch (EntityPropertyTypeException e) {
242:                    // System.out.println("TypeException.");
243:                    return null;
244:                } catch (TypeException e) {
245:                    // System.out.println("TypeException.");
246:                    return null;
247:                } catch (PermissionException e) {
248:                    // System.out.println("PermissionException");
249:                    return null;
250:                }
251:            }
252:
253:            /**
254:             * Gets the modification time of the presentation - always goes through to the 
255:             * Content service so as to get the live values.
256:             * 
257:             * @param pres
258:             * @return
259:             */
260:            private Time getModificationTime(ContentCollection collection) {
261:
262:                Time retval = null;
263:                if (collection == null)
264:                    return null;
265:
266:                try {
267:                    ResourceProperties props = collection.getProperties();
268:                    retval = props
269:                            .getTimeProperty(ResourceProperties.PROP_MODIFIED_DATE);
270:                    // System.out.println("Returning "+retval);
271:                    return retval;
272:                } catch (EntityPropertyNotDefinedException e) {
273:                    // System.out.println("EntityPropertyNotDefinedException.");
274:                    return null;
275:                } catch (EntityPropertyTypeException e) {
276:                    // System.out.println("EntityPropertyNotDefinedException.");
277:                    return null;
278:                }
279:            }
280:
281:            /**
282:             * Gets the modification date of the presentation - always goes through to the 
283:             * Content service so as to get the live values.
284:             * 
285:             * @param pres
286:             * @return
287:             */
288:            public String getModificationDate(Presentation pres) {
289:                Time modTime = getModificationTime(pres);
290:
291:                return modTime.toStringLocal();
292:            }
293:
294:            /**
295:             * Start a slide show on a presentation
296:             * 
297:             * @author	Charles Severance
298:             */
299:
300:            public boolean startShow(Presentation pres) {
301:                // System.out.println("startShow:"+pres);
302:                return setCurrentSlideProperty(pres, 0);
303:            }
304:
305:            /**
306:             * Stop a slide show on a presentation
307:             * 
308:             * @author	Charles Severance
309:             */
310:            public boolean stopShow(Presentation pres) {
311:                // System.out.println("stopShow:"+pres);
312:                return setCurrentSlideProperty(pres, -1);
313:            }
314:
315:            public boolean rewindShow(Presentation pres) {
316:                return setCurrentSlideProperty(pres, 0);
317:            }
318:
319:            /**
320:             * Advance a slide show on a presentation
321:             * 
322:             * @author  Charles Severance
323:             */
324:
325:            public boolean advanceShow(Presentation pres) {
326:                // System.out.println("advanceShow:"+pres);
327:                if (pres == null)
328:                    return false;
329:
330:                int currSlide = getCurrentSlideProperty(pres);
331:
332:                currSlide++;
333:
334:                if (currSlide > pres.getSlideCount() - 1) {
335:                    currSlide = pres.getSlideCount() - 1;
336:                }
337:                if (currSlide < 0)
338:                    currSlide = 0;
339:
340:                return setCurrentSlideProperty(pres, currSlide);
341:            }
342:
343:            /**
344:             * Reverse a slide show on a presentation
345:             * 
346:             * @author  Charles Severance
347:             */
348:
349:            public boolean backShow(Presentation pres) {
350:                if (pres == null)
351:                    return false;
352:
353:                int currSlide = getCurrentSlideProperty(pres);
354:
355:                currSlide--;
356:
357:                if (currSlide > pres.getSlideCount() - 1) {
358:                    currSlide = pres.getSlideCount() - 1;
359:
360:                }
361:                if (currSlide < 0)
362:                    currSlide = 0;
363:                return setCurrentSlideProperty(pres, currSlide);
364:            }
365:
366:            /** 
367:             * Returns true if an active show is going on for the presentation 
368:             * 
369:             * @author Charles Severance
370:             */
371:
372:            public boolean isShowing(Presentation pres) {
373:                if (pres == null)
374:                    return false;
375:                int currSlide = getCurrentSlideProperty(pres);
376:                return (currSlide >= 0);
377:            }
378:
379:            /**
380:             * Get current slide for a show
381:             *
382:             * @author  Charles Severance
383:             */
384:
385:            public Slide getCurrentSlide(Presentation pres) {
386:                if (pres == null)
387:                    return null;
388:
389:                int currSlide = getCurrentSlideNumber(pres);
390:
391:                return pres.getSlide(currSlide);
392:            }
393:
394:            public int getCurrentSlideNumber(Presentation pres) {
395:                if (pres == null)
396:                    return -1;
397:
398:                int currSlide = getCurrentSlideProperty(pres);
399:                if (currSlide > pres.getSlideCount() - 1)
400:                    currSlide = pres.getSlideCount() - 1;
401:                if (currSlide < 0)
402:                    currSlide = 0;
403:
404:                return currSlide;
405:            }
406:
407:            /** Get the current property for the current slide - return -1 if not there */
408:            private int getCurrentSlideProperty(Presentation pres) {
409:                String presId = getPresentationIdString(pres);
410:                if (presId == null)
411:                    return 0;
412:
413:                try {
414:                    // System.out.println("getCurrentSlideProperty:"+presId);
415:                    ContentCollection collection = ContentHostingService
416:                            .getCollection(presId);
417:
418:                    return getCurrentSlideProperty(collection);
419:                } catch (IdUnusedException e) {
420:                    // System.out.println("IdUnusedException.");
421:                    return -1;
422:                } catch (TypeException e) {
423:                    // System.out.println("TypeException.");
424:                    return -1;
425:                } catch (PermissionException e) {
426:                    // System.out.println("PermissionException");
427:                    return -1;
428:                }
429:            }
430:
431:            /** Get the current property for the current slide - return -1 if not there */
432:            private int getCurrentSlideProperty(ContentCollection collection) {
433:                if (collection == null)
434:                    return -1;
435:
436:                try {
437:                    ResourceProperties props = collection.getProperties();
438:                    long longval = props
439:                            .getLongProperty(PROP_PRESENT_CURRENT_SLIDE);
440:                    // System.out.println("Property long = "+longval);
441:                    int retval = (int) longval;
442:                    return retval;
443:                } catch (EntityPropertyNotDefinedException e) {
444:                    // Normal path
445:                    // System.out.println("EntityPropertyNotDefinedException.");
446:                    return -1;
447:                } catch (EntityPropertyTypeException e) {
448:                    // System.out.println("TypeException.");
449:                    return -1;
450:                }
451:            }
452:
453:            private boolean setCurrentSlideProperty(Presentation pres,
454:                    int slideno) {
455:                String presId = getPresentationIdString(pres);
456:                if (presId == null)
457:                    return false;
458:
459:                // System.out.println("setCurrentSlideProperty slideno="+slideno+" id="+presId);
460:                try {
461:                    ContentCollection collection = ContentHostingService
462:                            .getCollection(presId);
463:
464:                    ContentCollectionEdit cedit = null;
465:                    ResourcePropertiesEdit pedit = null;
466:                    if (ContentHostingService.getProperties(presId)
467:                            .getBooleanProperty(
468:                                    ResourceProperties.PROP_IS_COLLECTION)) {
469:                        cedit = ContentHostingService.editCollection(presId);
470:                        pedit = cedit.getPropertiesEdit();
471:                    } else {
472:                        return false;
473:                    }
474:                    if (slideno <= -1) {
475:                        // System.out.println("Removed property"+PROP_PRESENT_CURRENT_SLIDE);
476:                        pedit.removeProperty(PROP_PRESENT_CURRENT_SLIDE);
477:                    } else {
478:                        pedit.addProperty(PROP_PRESENT_CURRENT_SLIDE, ""
479:                                + slideno);
480:                    }
481:                    ContentHostingService.commitCollection(cedit);
482:                    // System.out.println("Commit Happenned");
483:                    return true;
484:                } catch (IdUnusedException e) {
485:                    // System.out.println("IdUnusedException.");
486:                } catch (EntityPropertyTypeException e) {
487:                    // System.out.println("TypeException.");
488:                } catch (TypeException e) {
489:                    // System.out.println("TypeException.");
490:                } catch (PermissionException e) {
491:                    // System.out.println("PermissionException");
492:                } catch (InUseException e) {
493:                    // System.out.println("InUseException");
494:                } catch (EntityPropertyNotDefinedException e) {
495:                    // System.out.println("EntityPropertyNotDefinedException");
496:                }
497:                return false;
498:            }
499:
500:            /**
501:             *  Return an interator which lists all known presentations.
502:             *
503:             *  @author Mark Norton
504:             */
505:            public List getPresentations() throws IdUnusedException,
506:                    TypeException, PermissionException {
507:                String context = getContext();
508:
509:                List presentations = new Vector();
510:                String home = getHomeCollection();
511:                String collectionId = home + "Presentations/";
512:
513:                // Get the collection and throw an exception upwards if there is a problem
514:                // System.out.println("Getting Presentations From:"+collectionId);
515:                ContentCollection collection = ContentHostingService
516:                        .getCollection(collectionId);
517:                List newMembers = collection.getMemberResources();
518:                // String sortedBy = ResourceProperties.PROP_DISPLAY_NAME;
519:                String sortedBy = ResourceProperties.PROP_MODIFIED_DATE;
520:                Collections.sort(newMembers, ContentHostingService
521:                        .newContentHostingComparator(sortedBy, false));
522:                int size = newMembers.size();
523:                Hashtable moreMembers = new Hashtable();
524:                // System.out.println("Size: "+size);
525:                for (int i = 0; i < size; i++) {
526:                    try {
527:                        Entity resource = (Entity) newMembers.get(i);
528:                        String nextId = resource.getId();
529:                        // System.out.println("Next ID = "+nextId);
530:                        boolean isCollection = resource.getProperties()
531:                                .getBooleanProperty(
532:                                        ResourceProperties.PROP_IS_COLLECTION);
533:
534:                        if (isCollection) {
535:                            Presentation xpres = loadPresentation(nextId);
536:                            if (xpres != null && xpres.getSlideCount() > 0)
537:                                presentations.add(xpres);
538:                        }
539:
540:                    } catch (EntityPropertyTypeException e) {
541:                        // System.out.println("TypeException.");
542:                        continue;
543:                    } catch (EntityPropertyNotDefinedException e) {
544:                        // System.out.println("EntityPropertyNotDefinedException");
545:                        continue;
546:                    }
547:                }
548:
549:                return presentations;
550:            }
551:
552:            /*
553:             * 	Load a presentation given it's repository directory.
554:             */
555:            private Presentation loadPresentation(String presId) {
556:                // System.out.println("loadPresentaton:"+presId);
557:
558:                Id id = null;
559:                try {
560:                    id = this .idManager.getId(presId);
561:                } catch (Throwable t) {
562:                    return null;
563:                }
564:                Presentation pres = null;
565:                try {
566:                    ContentCollection collection = ContentHostingService
567:                            .getCollection(presId);
568:
569:                    List slides = null;
570:                    String title = getTitle(collection);
571:                    Time modificationTime = getModificationTime(collection);
572:
573:                    pres = (Presentation) new PrPresentation(id, slides, title,
574:                            modificationTime);
575:
576:                    List colMembers = collection.getMemberResources();
577:
578:                    String sortedBy = ResourceProperties.PROP_DISPLAY_NAME;
579:                    Collections.sort(colMembers, ContentHostingService
580:                            .newContentHostingComparator(sortedBy, true));
581:                    // System.out.println("Sorted...");
582:                    int colsize = colMembers.size();
583:                    // System.out.println("Sub coll size "+colsize);
584:
585:                    for (int j = 0; j < colsize; j++) {
586:                        Entity subResource = (Entity) colMembers.get(j);
587:                        // System.out.println("   Next ID = "+subResource.getId());
588:                        // System.out.println("   Next URL = "+subResource.getUrl());	
589:
590:                        String slideName = "Slide Name";
591:                        String slideType = "SlideType";
592:                        String slideUrl = subResource.getUrl();
593:
594:                        //  Create the slide and add it to the presentation.
595:                        Slide slide = new PrSlide(slideUrl, slideName,
596:                                slideType);
597:                        pres.addSlide(slide);
598:                    }
599:
600:                    // System.out.println("Done adding slides...");
601:                } catch (IdUnusedException e) {
602:                    // System.out.println("IdUnusedException.");
603:                } catch (TypeException e) {
604:                    // System.out.println("TypeException.");
605:                } catch (PermissionException e) {
606:                    // System.out.println("PermissionException");
607:                }
608:
609:                return pres;
610:            }
611:        }
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