Source Code Cross Referenced for Repository.java in  » ERP-CRM-Financial » sakai » edu » indiana » lib » osid » base » repository » http » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » sakai » edu.indiana.lib.osid.base.repository.http 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package edu.indiana.lib.osid.base.repository.http;
002:
003:        import edu.indiana.lib.osid.base.repository.*;
004:
005:        import edu.indiana.lib.twinpeaks.net.*;
006:        import edu.indiana.lib.twinpeaks.search.*;
007:        import edu.indiana.lib.twinpeaks.util.*;
008:
009:        import java.io.*;
010:        import java.net.*;
011:        import java.lang.*;
012:        import java.util.*;
013:
014:        import javax.xml.parsers.*;
015:
016:        import org.w3c.dom.*;
017:        import org.w3c.dom.html.*;
018:        import org.xml.sax.*;
019:
020:        public class Repository extends
021:                edu.indiana.lib.osid.base.repository.Repository {
022:            private static org.apache.commons.logging.Log _log = edu.indiana.lib.twinpeaks.util.LogUtils
023:                    .getLog(Repository.class);
024:
025:            private java.util.Vector assetVector = new java.util.Vector();
026:
027:            private org.osid.id.IdManager idManager = null;
028:            private org.osid.shared.Id id = null;
029:            private String idString = null;
030:
031:            private String displayName = null;
032:            private String description = null;
033:
034:            private String url = null;
035:
036:            private org.osid.shared.Type repositoryType = new Type(
037:                    "sakaibrary", "repository", "metasearch");
038:            private org.osid.shared.Type assetType = new Type("mit.edu",
039:                    "asset", "library_content");
040:            private org.osid.shared.Type thumbnailType = new Type("mit.edu",
041:                    "partStructure", "thumbnail");
042:            private org.osid.shared.Type urlType = new Type("mit.edu",
043:                    "partStructure", "URL");
044:
045:            private java.util.Vector searchTypeVector = new java.util.Vector();
046:            private java.util.Vector queryHandlerVector = new java.util.Vector();
047:            private java.util.Vector responseHandlerVector = new java.util.Vector();
048:
049:            private AssetIterator assetIterator = null;
050:
051:            private org.osid.shared.Type searchPropertiesType = new Type(
052:                    "sakaibrary", "properties", "asynchMetasearch");
053:            private org.osid.shared.Type searchStatusPropertiesType = new Type(
054:                    "sakaibrary", "properties", "metasearchStatus");
055:
056:            private org.osid.shared.Properties searchStatusProperties = null;
057:            private org.osid.shared.Properties searchProperties = null;
058:
059:            protected Repository(String displayName, String description,
060:                    String idString, java.util.Vector searchTypeVector,
061:                    java.util.Vector queryHandlerVector,
062:                    java.util.Vector responseHandlerVector,
063:                    org.osid.id.IdManager idManager)
064:                    throws org.osid.repository.RepositoryException {
065:                this .displayName = displayName;
066:                this .description = description;
067:                this .idString = idString;
068:                this .searchTypeVector = searchTypeVector;
069:                this .queryHandlerVector = queryHandlerVector;
070:                this .responseHandlerVector = responseHandlerVector;
071:                this .idManager = idManager;
072:                this .id = null;
073:
074:                try {
075:                    this .id = idManager.getId(this .idString);
076:                } catch (Throwable t) {
077:                    _log.error(t.getMessage());
078:                }
079:                _log.debug("new HTTP Repository(): " + displayName + ", id: "
080:                        + this .id);
081:            }
082:
083:            public String getDisplayName()
084:                    throws org.osid.repository.RepositoryException {
085:                return this .displayName;
086:            }
087:
088:            public String getDescription()
089:                    throws org.osid.repository.RepositoryException {
090:                return this .description;
091:            }
092:
093:            public org.osid.shared.Id getId()
094:                    throws org.osid.repository.RepositoryException {
095:                return this .id;
096:            }
097:
098:            public org.osid.shared.Type getType()
099:                    throws org.osid.repository.RepositoryException {
100:                return this .repositoryType;
101:            }
102:
103:            public org.osid.shared.TypeIterator getAssetTypes()
104:                    throws org.osid.repository.RepositoryException {
105:                java.util.Vector results = new java.util.Vector();
106:                try {
107:                    results.addElement(this .assetType);
108:                    return new TypeIterator(results);
109:                } catch (Throwable t) {
110:                    _log.error(t.getMessage());
111:                    throw new org.osid.repository.RepositoryException(
112:                            org.osid.OsidException.OPERATION_FAILED);
113:                }
114:            }
115:
116:            public org.osid.repository.RecordStructureIterator getRecordStructures()
117:                    throws org.osid.repository.RepositoryException {
118:                java.util.Vector results = new java.util.Vector();
119:                results.addElement(RecordStructure.getInstance());
120:                return new RecordStructureIterator(results);
121:            }
122:
123:            public org.osid.repository.RecordStructureIterator getMandatoryRecordStructures(
124:                    org.osid.shared.Type assetType)
125:                    throws org.osid.repository.RepositoryException {
126:                if (assetType == null) {
127:                    throw new org.osid.repository.RepositoryException(
128:                            org.osid.shared.SharedException.NULL_ARGUMENT);
129:                }
130:                if (assetType.isEqual(this .assetType)) {
131:                    java.util.Vector results = new java.util.Vector();
132:                    results.addElement(RecordStructure.getInstance());
133:                    return new RecordStructureIterator(results);
134:                }
135:                throw new org.osid.repository.RepositoryException(
136:                        org.osid.shared.SharedException.UNKNOWN_TYPE);
137:            }
138:
139:            public org.osid.shared.TypeIterator getSearchTypes()
140:                    throws org.osid.repository.RepositoryException {
141:                java.util.Vector results = new java.util.Vector();
142:                try {
143:                    return new TypeIterator(this .searchTypeVector);
144:                } catch (Throwable t) {
145:                    _log.error(t.getMessage());
146:                    throw new org.osid.repository.RepositoryException(
147:                            org.osid.OsidException.OPERATION_FAILED);
148:                }
149:            }
150:
151:            public org.osid.shared.TypeIterator getStatusTypes()
152:                    throws org.osid.repository.RepositoryException {
153:                java.util.Vector results = new java.util.Vector();
154:                try {
155:                    results.addElement(new Type("mit.edu", "asset", "valid"));
156:                    return new TypeIterator(results);
157:                } catch (Throwable t) {
158:                    _log.error(t.getMessage());
159:                    throw new org.osid.repository.RepositoryException(
160:                            org.osid.OsidException.OPERATION_FAILED);
161:                }
162:            }
163:
164:            public org.osid.shared.Type getStatus(org.osid.shared.Id assetId)
165:                    throws org.osid.repository.RepositoryException {
166:                return new Type("mit.edu", "asset", "valid");
167:            }
168:
169:            public boolean validateAsset(org.osid.shared.Id assetId)
170:                    throws org.osid.repository.RepositoryException {
171:                return true;
172:            }
173:
174:            public org.osid.repository.AssetIterator getAssetsBySearch(
175:                    java.io.Serializable searchCriteria,
176:                    org.osid.shared.Type searchType,
177:                    org.osid.shared.Properties searchProperties)
178:                    throws org.osid.repository.RepositoryException {
179:                QueryBase queryBase;
180:                SearchResultBase resultHandler;
181:                SessionContext sessionContext;
182:
183:                if (searchCriteria == null) {
184:                    throw new org.osid.repository.RepositoryException(
185:                            org.osid.shared.SharedException.NULL_ARGUMENT);
186:                }
187:
188:                if (!(searchCriteria instanceof  String)) {
189:                    throw new org.osid.repository.RepositoryException(
190:                            org.osid.OsidException.OPERATION_FAILED);
191:                }
192:
193:                if (searchType == null) {
194:                    throw new org.osid.repository.RepositoryException(
195:                            org.osid.shared.SharedException.NULL_ARGUMENT);
196:                }
197:
198:                if (searchProperties == null) {
199:                    throw new org.osid.repository.RepositoryException(
200:                            org.osid.shared.SharedException.NULL_ARGUMENT);
201:                }
202:
203:                try {
204:                    org.osid.shared.Type type;
205:                    String criteria;
206:                    String sessionId;
207:                    boolean doRange;
208:
209:                    sessionId = (String) searchProperties.getProperty("guid");
210:                    if (StringUtils.isNull(sessionId)) {
211:                        throw new org.osid.repository.RepositoryException(
212:                                org.osid.shared.SharedException.NULL_ARGUMENT);
213:                    }
214:
215:                    /*
216:                    		doRange	= "rangeRequest".equalsIgnoreCase((String) searchProperties.getProperty("action"));
217:                    		if ((doRange) && (assetIterator == null))
218:                    		{
219:                    			throw new org.osid.repository.RepositoryException("Initial search cannot be a range request");
220:                    		}
221:                     */
222:                    doRange = false;
223:
224:                    type = (org.osid.shared.Type) (this .searchTypeVector
225:                            .elementAt(0));
226:                    if (!type.isEqual(searchType)) {
227:                        throw new org.osid.repository.RepositoryException(
228:                                org.osid.shared.SharedException.UNKNOWN_TYPE);
229:                    }
230:
231:                    this .searchProperties = searchProperties;
232:
233:                    criteria = (String) searchCriteria;
234:                    sessionContext = SessionContext.getInstance(sessionId);
235:                    queryBase = doQuery(criteria, this .getDisplayName(),
236:                            searchProperties, sessionContext);
237:                    resultHandler = getResponseHandler(queryBase);
238:
239:                    if (doRange) {
240:                        assetIterator.initialize(searchProperties);
241:                    } else {
242:                        assetIterator = new AssetIterator(
243:                                this .getDisplayName(), queryBase,
244:                                resultHandler, searchProperties, this .getId(),
245:                                sessionContext);
246:                    }
247:                } catch (Throwable throwable) {
248:                    throwable.printStackTrace();
249:                    _log.error(throwable.getMessage());
250:
251:                    throw new org.osid.repository.RepositoryException(
252:                            org.osid.OsidException.OPERATION_FAILED);
253:                }
254:
255:                return assetIterator;
256:            }
257:
258:            public org.osid.repository.RecordStructureIterator getRecordStructuresByType(
259:                    org.osid.shared.Type recordStructureType)
260:                    throws org.osid.repository.RepositoryException {
261:                if (recordStructureType == null) {
262:                    throw new org.osid.repository.RepositoryException(
263:                            org.osid.shared.SharedException.NULL_ARGUMENT);
264:                }
265:                if (recordStructureType.isEqual(new Type("mit.edu",
266:                        "recordStructure", "wellFormed"))) {
267:                    java.util.Vector results = new java.util.Vector();
268:                    // don't return the content's strucutre even if it matches, since this that is a separate and special case
269:                    results.addElement(RecordStructure.getInstance());
270:                    return new RecordStructureIterator(results);
271:                }
272:                throw new org.osid.repository.RepositoryException(
273:                        org.osid.shared.SharedException.UNKNOWN_TYPE);
274:            }
275:
276:            public org.osid.shared.PropertiesIterator getProperties()
277:                    throws org.osid.repository.RepositoryException {
278:                java.util.Vector results = new java.util.Vector();
279:
280:                try {
281:                    if (searchProperties != null) {
282:                        searchStatusProperties = getStatusProperties((String) searchProperties
283:                                .getProperty("guid"));
284:
285:                        results.addElement(searchProperties);
286:                        results.addElement(searchStatusProperties);
287:                    }
288:
289:                    return new PropertiesIterator(results);
290:                } catch (Throwable throwable) {
291:                    _log.error(throwable.getMessage());
292:                    throw new org.osid.repository.RepositoryException(
293:                            org.osid.OsidException.OPERATION_FAILED);
294:                }
295:            }
296:
297:            public org.osid.shared.Properties getPropertiesByType(
298:                    org.osid.shared.Type propertiesType)
299:                    throws org.osid.repository.RepositoryException {
300:                if (propertiesType == null) {
301:                    throw new org.osid.repository.RepositoryException(
302:                            org.osid.shared.SharedException.NULL_ARGUMENT);
303:                }
304:
305:                try {
306:                    org.osid.shared.PropertiesIterator iterator = getProperties();
307:
308:                    while (iterator.hasNextProperties()) {
309:                        org.osid.shared.Properties properties = iterator
310:                                .nextProperties();
311:
312:                        if (properties.getType().isEqual(propertiesType)) {
313:                            return properties;
314:                        }
315:                    }
316:                } catch (org.osid.shared.SharedException exception) {
317:                    throw new org.osid.repository.RepositoryException(
318:                            org.osid.OsidException.OPERATION_FAILED);
319:                }
320:                throw new org.osid.repository.RepositoryException(
321:                        org.osid.shared.SharedException.UNKNOWN_TYPE);
322:            }
323:
324:            public org.osid.shared.TypeIterator getPropertyTypes()
325:                    throws org.osid.repository.RepositoryException {
326:                java.util.Vector results = new java.util.Vector();
327:
328:                results.addElement(searchPropertiesType);
329:                results.addElement(searchStatusPropertiesType);
330:
331:                try {
332:                    return new TypeIterator(results);
333:                } catch (Throwable t) {
334:                    _log.error(t.getMessage());
335:                    throw new org.osid.repository.RepositoryException(
336:                            org.osid.OsidException.OPERATION_FAILED);
337:                }
338:            }
339:
340:            protected void addAsset(org.osid.repository.Asset asset)
341:                    throws org.osid.repository.RepositoryException {
342:                this .assetVector.addElement(asset);
343:            }
344:
345:            public boolean supportsUpdate()
346:                    throws org.osid.repository.RepositoryException {
347:                return false;
348:            }
349:
350:            public boolean supportsVersioning()
351:                    throws org.osid.repository.RepositoryException {
352:                return false;
353:            }
354:
355:            /*
356:             * Local Helpers
357:             */
358:
359:            /**
360:             * Returns a new result set name for this transaction
361:             * @param sessionId Session ID (guid)
362:             * @return A shared Properties object reflecting the current status
363:             */
364:            private org.osid.shared.Properties getStatusProperties(
365:                    String sessionId)
366:                    throws org.osid.repository.RepositoryException {
367:                SessionContext sessionContext;
368:
369:                ArrayList dbList = new ArrayList();
370:                HashMap statusMap = new HashMap();
371:                String status = null;
372:                int active = 0;
373:                int hits = 0;
374:                int estimate = 0;
375:
376:                try {
377:                    sessionContext = SessionContext.getInstance(sessionId);
378:
379:                    for (Iterator iterator = StatusUtils
380:                            .getStatusMapEntrySetIterator(sessionContext); iterator
381:                            .hasNext();) {
382:                        Map.Entry entry = (Map.Entry) iterator.next();
383:                        HashMap targetMap = (HashMap) entry.getValue();
384:                        HashMap singleMap;
385:                        boolean targetActive;
386:
387:                        dbList.add(entry.getKey());
388:                        targetActive = false;
389:
390:                        status = (String) targetMap.get("STATUS");
391:                        if (status.equals("ACTIVE")) {
392:                            active++;
393:                            targetActive = true;
394:                        }
395:                        hits += Integer
396:                                .parseInt((String) targetMap.get("HITS"));
397:                        estimate += Integer.parseInt((String) targetMap
398:                                .get("ESTIMATE"));
399:
400:                        singleMap = new HashMap();
401:
402:                        singleMap.put("status", status);
403:                        singleMap.put("statusMessage", (String) targetMap
404:                                .get("STATUS_MESSAGE"));
405:                        singleMap.put("numRecordsFetched", new Integer(
406:                                (String) targetMap.get("HITS")));
407:                        singleMap.put("numRecordsFound", new Integer(
408:                                (String) targetMap.get("ESTIMATE")));
409:                        singleMap.put("numRecordsMerged", new Integer(0));
410:
411:                        statusMap.put(entry.getKey(), singleMap);
412:                    }
413:
414:                    _log.debug(this .getDisplayName() + ": " + active
415:                            + " searches active");
416:
417:                    statusMap.put("databaseNames", dbList);
418:
419:                    statusMap.put("status", sessionContext.get("STATUS"));
420:                    statusMap.put("statusMessage", sessionContext
421:                            .get("STATUS_MESSAGE"));
422:
423:                    statusMap.put("numRecordsFetched", new Integer(hits));
424:                    statusMap.put("numRecordsFound", new Integer(estimate));
425:                    statusMap.put("numRecordsMerged", new Integer(0));
426:
427:                    statusMap
428:                            .put("delayHint", new Integer((active * 2 * 1024)));
429:
430:                    return new SharedProperties(statusMap,
431:                            searchStatusPropertiesType);
432:                } catch (Throwable throwable) {
433:                    _log.error(throwable.getMessage());
434:                    throw new org.osid.repository.RepositoryException(
435:                            org.osid.OsidException.OPERATION_FAILED);
436:                }
437:            }
438:
439:            /**
440:             * Select a query handler for the requested database
441:             * @param sessionContext Session context
442:             * @param name Database name (eg ERIC)
443:             * @return Query handler
444:             */
445:            private QueryBase selectQueryHandler(SessionContext sessionContext,
446:                    String name) {
447:                SearchSource source = SearchSource.getSourceByName(name);
448:                QueryBase handler;
449:
450:                try {
451:                    handler = source.getQueryHandler();
452:                } catch (Exception exception) {
453:                    throw new SearchException(exception.toString());
454:                }
455:                /*
456:                 * Initialize and return the query handler
457:                 */
458:                handler.initialize(sessionContext);
459:                return handler;
460:            }
461:
462:            /**
463:             * Execute an HTTP query for a standard search operation
464:             * @param request The servlet request block for this transaction
465:             * @param sessionContext Session context for this user
466:             * @param database Database name
467:             */
468:            private QueryBase doQuery(String searchString, String database,
469:                    org.osid.shared.Properties searchProperties,
470:                    SessionContext sessionContext)
471:                    throws org.osid.repository.RepositoryException,
472:                    org.osid.shared.SharedException {
473:                QueryBase query;
474:                HashMap parameterMap;
475:                ArrayList<String> targetList;
476:                StringBuffer targetBuffer;
477:
478:                parameterMap = new HashMap();
479:                parameterMap.put("searchString", searchString);
480:                parameterMap.put("database", database);
481:
482:                parameterMap.put("guid", searchProperties.getProperty("guid"));
483:                parameterMap
484:                        .put("url", searchProperties.getProperty("baseUrl"));
485:                parameterMap.put("username", searchProperties
486:                        .getProperty("username"));
487:                parameterMap.put("password", searchProperties
488:                        .getProperty("password"));
489:                parameterMap.put("sortBy", searchProperties
490:                        .getProperty("sortBy"));
491:                parameterMap.put("pageSize", searchProperties
492:                        .getProperty("pageSize"));
493:                parameterMap.put("startRecord", searchProperties
494:                        .getProperty("startRecord"));
495:                parameterMap.put("maxRecords", searchProperties
496:                        .getProperty("maxRecords"));
497:
498:                parameterMap.put("action", "startSearch"); // or "requestRange"
499:                /*
500:                 * Add in the target database list
501:                 */
502:                targetBuffer = new StringBuffer();
503:                targetList = (java.util.ArrayList<String>) searchProperties
504:                        .getProperty("databaseIds");
505:
506:                for (int i = 0; i < targetList.size(); i++) {
507:                    if (i > 0) {
508:                        targetBuffer.append(' ');
509:                    }
510:                    targetBuffer.append(targetList.get(i));
511:                }
512:                parameterMap.put("targets", targetBuffer.toString());
513:                /*
514:                 * Allow the embedded configuration to override the URL, username and password
515:                 */
516:                if (SearchSource.getConfiguredParameter(database, "url") != null) {
517:                    parameterMap.put("url", SearchSource
518:                            .getConfiguredParameter(database, "url"));
519:                }
520:
521:                if (SearchSource.getConfiguredParameter(database, "username") != null) {
522:                    parameterMap.put("username", SearchSource
523:                            .getConfiguredParameter(database, "username"));
524:                }
525:
526:                if (SearchSource.getConfiguredParameter(database, "password") != null) {
527:                    parameterMap.put("password", SearchSource
528:                            .getConfiguredParameter(database, "password"));
529:                }
530:
531:                query = selectQueryHandler(sessionContext, database);
532:                query.parseRequest(parameterMap);
533:                query.doQuery();
534:
535:                return query;
536:            }
537:
538:            /**
539:             * Select a search result handler for this source
540:             * @param name Source name
541:             * @return Search result handler
542:             */
543:            private SearchResultBase selectSearchResultHandler(String name) {
544:                SearchSource source = SearchSource.getSourceByName(name);
545:                SearchResultBase handler;
546:
547:                try {
548:                    handler = source.getSearchResultHandler();
549:                } catch (Exception exception) {
550:                    throw new SearchException(exception.toString());
551:                }
552:                return handler;
553:            }
554:
555:            /**
556:             * Locate the appropriate response handler
557:             * @param query Query handler
558:             */
559:            private SearchResultBase getResponseHandler(QueryBase query) {
560:                SearchResultBase searchResult;
561:
562:                searchResult = selectSearchResultHandler(query
563:                        .getRequestParameter("database"));
564:                return searchResult;
565:            }
566:        }
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