Source Code Cross Referenced for DefaultCatalog.java in  » GIS » GeoTools-2.4.1 » org » geotools » catalog » defaults » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.catalog.defaults 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2006, GeoTools Project Managment Committee (PMC)
005:         *    (C) 2005, Refractions Research Inc.
006:         *    
007:         *    This library is free software; you can redistribute it and/or
008:         *    modify it under the terms of the GNU Lesser General Public
009:         *    License as published by the Free Software Foundation;
010:         *    version 2.1 of the License.
011:         *
012:         *    This library is distributed in the hope that it will be useful,
013:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *    Lesser General Public License for more details.
016:         */
017:        package org.geotools.catalog.defaults;
018:
019:        import java.io.IOException;
020:        import java.net.MalformedURLException;
021:        import java.net.URI;
022:        import java.net.URISyntaxException;
023:        import java.net.URL;
024:        import java.util.ArrayList;
025:        import java.util.Collections;
026:        import java.util.HashSet;
027:        import java.util.Iterator;
028:        import java.util.LinkedList;
029:        import java.util.List;
030:
031:        import org.geotools.catalog.AbstractCatalog;
032:        import org.geotools.catalog.Catalog;
033:        import org.geotools.catalog.CatalogInfo;
034:        import org.geotools.catalog.GeoResource;
035:        import org.geotools.catalog.GeoResourceInfo;
036:        import org.geotools.catalog.ResolveChangeEvent;
037:        import org.geotools.catalog.ResolveChangeListener;
038:        import org.geotools.catalog.ResolveDelta;
039:        import org.geotools.catalog.Service;
040:        import org.geotools.catalog.ServiceInfo;
041:        import org.geotools.util.ListenerList;
042:        import org.geotools.util.ProgressListener;
043:
044:        import com.vividsolutions.jts.geom.Envelope;
045:
046:        /**
047:         * Default Catalog implementation. All services are stored in memory.
048:         * 
049:         * @author David Zwiers, Refractions Research
050:         * @author Justin Deoliveira, jdeolive@openplans.org
051:         * @since 0.6
052:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/main/src/main/java/org/geotools/catalog/defaults/DefaultCatalog.java $
053:         */
054:        public class DefaultCatalog extends AbstractCatalog {
055:            private HashSet services = new HashSet();
056:            private CatalogInfo metadata;
057:            private ListenerList catalogListeners;
058:
059:            public DefaultCatalog() {
060:                DefaultCatalogInfo metadata = new DefaultCatalogInfo() {
061:                };
062:                metadata.setTitle("Default Catalog"); //$NON-NLS-1$
063:                try {
064:                    metadata.setSource(new URI("http://localhost"));
065:                } catch (URISyntaxException e) {
066:                    //do nothing
067:                }
068:
069:                this .metadata = metadata;
070:                catalogListeners = new ListenerList();
071:            }
072:
073:            public DefaultCatalog(CatalogInfo metadata) {
074:                this ();
075:                this .metadata = metadata;
076:            }
077:
078:            /**
079:             * @see net.refractions.udig.catalog.ICatalog#addCatalogListener(net.refractions.udig.catalog.ICatalog.ICatalogListener)
080:             * @param listener
081:             */
082:            public void addCatalogListener(ResolveChangeListener listener) {
083:                catalogListeners.add(listener);
084:            }
085:
086:            /**
087:             * @see net.refractions.udig.catalog.ICatalog#removeCatalogListener(net.refractions.udig.catalog.ICatalog.ICatalogListener)
088:             * @param listener
089:             */
090:            public void removeCatalogListener(ResolveChangeListener listener) {
091:                catalogListeners.remove(listener);
092:            }
093:
094:            /**
095:             * @see net.refractions.udig.catalog.ICatalog#add(net.refractions.udig.catalog.IService)
096:             * @param entry
097:             * @throws UnsupportedOperationException
098:             */
099:            public void add(Service entry) throws UnsupportedOperationException {
100:                if (entry == null || entry.getIdentifier() == null)
101:                    throw new NullPointerException("Cannot have a null id"); //$NON-NLS-1$
102:                services.add(entry);
103:                ResolveDelta deltaAdded = new DefaultResolveDelta(entry,
104:                        ResolveDelta.Kind.ADDED);
105:                ResolveDelta deltaChanged = new DefaultResolveDelta(this ,
106:                        Collections.singletonList(deltaAdded));
107:                fire(new DefaultResolveChangeEvent(DefaultCatalog.this ,
108:                        ResolveChangeEvent.Type.POST_CHANGE, deltaChanged));
109:            }
110:
111:            /**
112:             * @see net.refractions.udig.catalog.ICatalog#remove(net.refractions.udig.catalog.IService)
113:             * @param entry
114:             * @throws UnsupportedOperationException
115:             */
116:            public void remove(Service entry)
117:                    throws UnsupportedOperationException {
118:                if (entry == null || entry.getIdentifier() == null)
119:                    throw new NullPointerException("Cannot have a null id"); //$NON-NLS-1$
120:                ResolveDelta deltaRemoved = new DefaultResolveDelta(entry,
121:                        ResolveDelta.Kind.REMOVED);
122:                ResolveDelta deltaChanged = new DefaultResolveDelta(this ,
123:                        Collections.singletonList(deltaRemoved));
124:                fire(new DefaultResolveChangeEvent(DefaultCatalog.this ,
125:                        ResolveChangeEvent.Type.PRE_DELETE, deltaChanged));
126:                services.remove(entry);
127:                fire(new DefaultResolveChangeEvent(DefaultCatalog.this ,
128:                        ResolveChangeEvent.Type.POST_CHANGE, deltaRemoved));
129:            }
130:
131:            public void replace(URI id, Service entry)
132:                    throws UnsupportedOperationException {
133:                if (entry == null || entry.getIdentifier() == null
134:                        || id == null)
135:                    throw new NullPointerException("Cannot have a null id"); //$NON-NLS-1$
136:
137:                List victims = findService(id, null);
138:
139:                List changes = new ArrayList();
140:                for (Iterator vitr = victims.iterator(); vitr.hasNext();) {
141:                    Service service = (Service) vitr.next();
142:                    List childChanges = new ArrayList();
143:                    try {
144:                        List newChildren = entry.members(null);
145:                        List oldChildren = service.members(null);
146:                        if (oldChildren != null)
147:                            for (Iterator oitr = oldChildren.iterator(); oitr
148:                                    .hasNext();) {
149:                                GeoResource oldChild = (GeoResource) oitr
150:                                        .next();
151:                                String oldName = oldChild.getIdentifier()
152:                                        .toString();
153:                                for (Iterator citr = newChildren.iterator(); citr
154:                                        .hasNext();) {
155:                                    GeoResource child = (GeoResource) citr
156:                                            .next();
157:                                    String name = child.getIdentifier()
158:                                            .toString();
159:                                    if (oldName.equals(name)) {
160:                                        childChanges
161:                                                .add(new DefaultResolveDelta(
162:                                                        child,
163:                                                        oldChild,
164:                                                        ResolveDelta.NO_CHILDREN));
165:                                        break;
166:                                    }
167:                                }
168:                            }
169:                    } catch (IOException ignore) {
170:                        // no children? Not a very good entry ..
171:                    }
172:                    changes.add(new DefaultResolveDelta(service, entry,
173:                            childChanges));
174:                }
175:                ResolveDelta deltas = new DefaultResolveDelta(this , changes);
176:                ResolveChangeEvent event = new DefaultResolveChangeEvent(this ,
177:                        ResolveChangeEvent.Type.PRE_DELETE, deltas);
178:                fire(event);
179:
180:                services.removeAll(victims);
181:                services.add(entry);
182:            }
183:
184:            /**
185:             * Quick search by url match.
186:             * @param query
187:             * 
188:             * @see net.refractions.udig.catalog.ICatalog#search(org.geotools.filter.Filter)
189:             * @return List<IResolve>
190:             * @throws IOException
191:             */
192:            public List find(URI query, ProgressListener monitor) {
193:                List list = new ArrayList();
194:                try {
195:                    URL qurl = query.toURL();
196:                    for (Iterator itr = services.iterator(); itr.hasNext();) {
197:                        Service service = (Service) itr.next();
198:                        URL url = service.getIdentifier().toURL();
199:                        if (url.getProtocol().equalsIgnoreCase(
200:                                qurl.getProtocol())
201:                                && ((url.getHost() == null || "".equals(url.getHost())) || (url.getHost() != null && url.getHost().equalsIgnoreCase(qurl.getHost()))) && //$NON-NLS-1$
202:                                ((url.getPath() == null || "".equals(url.getPath())) || (url.getPath() != null && url.getPath().equalsIgnoreCase(qurl.getPath()))) && //$NON-NLS-1$
203:                                ((url.getQuery() == null || "".equals(url.getQuery())) || (url.getQuery() != null && url.getQuery().equalsIgnoreCase(qurl.getQuery()))) && //$NON-NLS-1$
204:                                ((url.getAuthority() == null || "".equals(url.getAuthority())) || (url.getAuthority() != null && url.getAuthority().equalsIgnoreCase(qurl.getAuthority())))) { //$NON-NLS-1$
205:                            Iterator i;
206:                            if (qurl.getRef() == null) {
207:                                list.add(service);
208:                            } else
209:                                try {
210:
211:                                    /*
212:                                     * Although the following is a 'blocking' call, we have deemed it safe based on
213:                                     * the following reasons: This will only be called for Identifiers which are
214:                                     * well known. The Services being checked have already been screened, and only a
215:                                     * limited number of services (ussually 1) will be called. 1) The Id was aquired
216:                                     * from the catalog ... and this is a look-up, in which case the uri exists. 2)
217:                                     * The Id was persisted. In the future this will also be free, as we plan on
218:                                     * caching the equivalent of a getCapabilities document between runs (will have
219:                                     * to be updated too as the app has time).
220:                                     */
221:                                    List t = service.members(monitor);
222:                                    i = t == null ? null : t.iterator();
223:                                    if (qurl.getRef() != null) {
224:                                        // it's a resource
225:                                        while (i.hasNext()) {
226:                                            GeoResource res = (GeoResource) i
227:                                                    .next();
228:                                            if (qurl.getRef().equals(
229:                                                    res.getIdentifier().toURL()
230:                                                            .getRef()))
231:                                                list.add(res);
232:                                        }
233:                                    } else {
234:                                        while (i != null && i.hasNext()) {
235:                                            list.add(i.next());
236:                                        }
237:                                    }
238:
239:                                } catch (IOException e) {
240:                                    e.printStackTrace();
241:                                    //TODO: log
242:                                }
243:
244:                        }
245:                    }
246:                } catch (MalformedURLException e) {
247:                    e.printStackTrace();
248:                    //TODO: log
249:                }
250:                return list;
251:            }
252:
253:            /**
254:             * Quick search by url match.
255:             * 
256:             * @see net.refractions.udig.catalog.ICatalog#search(org.geotools.filter.Filter)
257:             * @param query
258:             * @return List<IResolve>
259:             * @throws IOException
260:             */
261:            public List findService(URI query, ProgressListener monitor) {
262:
263:                List list = new ArrayList();
264:
265:                try {
266:                    URL qurl = query.toURL();
267:                    if (qurl.getRef() != null)
268:                        return list;
269:                    for (Iterator itr = services.iterator(); itr.hasNext();) {
270:                        Service service = (Service) itr.next();
271:
272:                        URL url = service.getIdentifier().toURL();
273:                        if (url.getProtocol().equalsIgnoreCase(
274:                                qurl.getProtocol())
275:                                && ((url.getHost() == null || "".equals(url.getHost())) || (url.getHost() != null && url.getHost().equalsIgnoreCase(qurl.getHost()))) && //$NON-NLS-1$
276:                                ((url.getPath() == null || "".equals(url.getPath())) || (url.getPath() != null && url.getPath().equalsIgnoreCase(qurl.getPath()))) && //$NON-NLS-1$
277:                                ((url.getQuery() == null || "".equals(url.getQuery())) || (url.getQuery() != null && url.getQuery().equalsIgnoreCase(qurl.getQuery()))) && //$NON-NLS-1$
278:                                ((url.getAuthority() == null || "".equals(url.getAuthority())) || (url.getAuthority() != null && url.getAuthority().equalsIgnoreCase(qurl.getAuthority())))) { //$NON-NLS-1$
279:                            list.add(service);
280:                        }
281:
282:                    }
283:                } catch (MalformedURLException e) {
284:                    //TODO: log this
285:                    e.printStackTrace();
286:                }
287:                return list;
288:            }
289:
290:            /**
291:             * Performs a search on this catalog based on the specified inputs. The pattern uses the
292:             * following conventions: use " " to surround a phase use + to represent 'AND' use - to
293:             * represent 'OR' use ! to represent 'NOT' use ( ) to designate scope The bbox provided shall be
294:             * in Lat - Long, or null if the search is not to be contained within a specified area.
295:             * 
296:             * @see net.refractions.udig.catalog.ICatalog#search(java.lang.String,
297:             *      com.vividsolutions.jts.geom.Envelope)
298:             * @param pattern
299:             * @param bbox used for an intersection test
300:             */
301:            public synchronized List search(String pattern, Envelope bbox,
302:                    ProgressListener monitor) {
303:
304:                if ((pattern == null || "".equals(pattern.trim()))
305:                        && (bbox == null || bbox.isNull())) //$NON-NLS-1$
306:                    return new LinkedList();
307:
308:                AST ast = null;
309:                if (pattern != null && !"".equals(pattern.trim()))
310:                    ast = ASTFactory.parse(pattern);
311:
312:                // TODO check cuncurrency issues here
313:
314:                List result = new LinkedList();
315:                HashSet tmp = new HashSet();
316:                tmp.addAll(this .services);
317:                try {
318:
319:                    Iterator services = tmp.iterator();
320:                    if (services != null) {
321:                        while (services.hasNext()) {
322:                            Service service = (Service) services.next();
323:                            if (check(service, ast)) {
324:                                result.add(service);
325:                            }
326:                            Iterator resources;
327:
328:                            try {
329:                                List t = service.members(monitor);
330:                                resources = t == null ? null : t.iterator();
331:                                while (resources != null && resources.hasNext()) {
332:                                    GeoResource resource = (GeoResource) resources
333:                                            .next();
334:                                    if (check(resource, ast, bbox)) {
335:                                        result.add(resource);
336:                                    }
337:                                }
338:                            } catch (IOException e) {
339:                                //TODO log this
340:                            } finally {
341:
342:                            }
343:                        }
344:                    }
345:                    return result;
346:                } finally {
347:
348:                }
349:            }
350:
351:            /* check the fields we catre about */
352:            protected static boolean check(Service service, AST pattern) {
353:                if (pattern == null) {
354:                    return false;
355:                }
356:                ServiceInfo info;
357:                try {
358:                    info = service == null ? null : service.getInfo(null);
359:                } catch (IOException e) {
360:                    info = null;
361:                    e.printStackTrace();
362:                    //TODO: log this
363:                }
364:                boolean t = false;
365:                if (info != null) {
366:                    if (info.getTitle() != null)
367:                        t = pattern.accept(info.getTitle());
368:                    if (!t && info.getKeywords() != null) {
369:                        String[] keys = info.getKeywords();
370:                        for (int i = 0; !t && i < keys.length; i++)
371:                            if (keys[i] != null)
372:                                t = pattern.accept(keys[i]);
373:                    }
374:                    if (!t && info.getSchema() != null)
375:                        t = pattern.accept(info.getSchema().toString());
376:                    if (!t && info.getAbstract() != null)
377:                        t = pattern.accept(info.getAbstract());
378:                    if (!t && info.getDescription() != null)
379:                        t = pattern.accept(info.getDescription());
380:                }
381:                return t;
382:            }
383:
384:            /* check the fields we catre about */
385:            protected static boolean check(GeoResource resource, AST pattern) {
386:                if (pattern == null)
387:                    return true;
388:                GeoResourceInfo info;
389:                try {
390:                    info = (resource == null ? null : resource.getInfo(null));
391:                } catch (IOException e) {
392:                    //TODO: log this
393:                    info = null;
394:                    e.printStackTrace();
395:                }
396:                boolean t = false;
397:                if (info != null) {
398:                    if (info.getTitle() != null)
399:                        t = pattern.accept(info.getTitle());
400:                    if (!t && info.getName() != null)
401:                        t = pattern.accept(info.getName());
402:                    if (!t && info.getKeywords() != null) {
403:                        String[] keys = info.getKeywords();
404:                        for (int i = 0; !t && i < keys.length; i++)
405:                            if (keys[i] != null)
406:                                t = pattern.accept(keys[i]);
407:                    }
408:                    if (!t && info.getSchema() != null)
409:                        t = pattern.accept(info.getSchema().toString());
410:                    if (!t && info.getDescription() != null)
411:                        t = pattern.accept(info.getDescription());
412:                }
413:                return t;
414:            }
415:
416:            protected static boolean check(GeoResource resource, AST pattern,
417:                    Envelope bbox) {
418:                if (!check(resource, pattern))
419:                    return false;
420:                if (bbox == null || bbox.isNull())
421:                    return true; // no checking here
422:                try {
423:                    return bbox.intersects(resource.getInfo(null).getBounds());
424:                } catch (IOException e) {
425:                    //TODO: log this
426:                    e.printStackTrace();
427:                    return false;
428:                }
429:            }
430:
431:            /**
432:             * Fire a resource changed event, these may be batched into one delta for performance.
433:             * 
434:             * @param event the event to be fired
435:             * 
436:             * @throws IOException protected void fireResourceEvent( IGeoResource resource,
437:             *         IResolveDelta.Kind kind ) throws IOException { Object[] listeners =
438:             *         catalogListeners.getListeners(); if( listeners.length == 0 ) return;
439:             *         GeoReferenceDelta rDelta = new GeoReferenceDelta( resource, kind ); ServiceDelta
440:             *         sDelta = new ServiceDelta( resource.getService(null), IDelta.Kind.NO_CHANGE,
441:             *         Collections.singletonList( rDelta ) ); CatalogDelta cDelta = new CatalogDelta(
442:             *         Collections.singletonList( (IDelta)sDelta ) ); fire( new CatalogChangeEvent(
443:             *         resource, ICatalogChangeEvent.Type.POST_CHANGE, cDelta ) ); }
444:             */
445:
446:            public void fire(ResolveChangeEvent event) {
447:                Object[] listeners = catalogListeners.getListeners();
448:                if (listeners.length == 0)
449:                    return;
450:
451:                for (int i = 0; i < listeners.length; ++i) {
452:                    try {
453:                        ((ResolveChangeListener) listeners[i]).changed(event);
454:                    } catch (Throwable die) {
455:                        die.printStackTrace();
456:                        //TODO: log this
457:                    }
458:                }
459:            }
460:
461:            /*
462:             * protected void fireServiceChanged( Object source, ServiceDelta sDelta ) { Object[] listeners =
463:             * catalogListeners.getListeners(); if( listeners.length == 0 ) return; CatalogDelta cDelta =
464:             * new CatalogDelta( Collections.singletonList( (IDelta)sDelta ) ); fire( new
465:             * CatalogChangeEvent( source , ICatalogChangeEvent.Type.POST_CHANGE, cDelta ) ); }
466:             */
467:
468:            /**
469:             * @see net.refractions.udig.catalog.ICatalog#resolve(java.lang.Class,
470:             *      org.eclipse.core.runtime.IProgressMonitor)
471:             */
472:            public Object resolve(Class adaptee, ProgressListener monitor) {
473:
474:                if (adaptee == null)
475:                    return null;
476:                if (adaptee.isAssignableFrom(Catalog.class))
477:                    return this ;
478:                if (adaptee.isAssignableFrom(CatalogInfo.class))
479:                    return metadata;
480:                if (adaptee.isAssignableFrom(services.getClass()))
481:                    return services;
482:                if (adaptee.isAssignableFrom(List.class))
483:                    return new LinkedList(services);
484:                if (adaptee.isAssignableFrom(catalogListeners.getClass()))
485:                    return catalogListeners;
486:
487:                return null;
488:            }
489:
490:            /*
491:             * @see net.refractions.udig.catalog.IResolve#canResolve(java.lang.Class)
492:             */
493:            public boolean canResolve(Class adaptee) {
494:                Object value = resolve(adaptee, null);
495:                return value != null;
496:            }
497:
498:            /*
499:             * @see net.refractions.udig.catalog.IResolve#members(org.eclipse.core.runtime.IProgressMonitor)
500:             */
501:            public List members(ProgressListener monitor) {
502:                return new LinkedList(services);
503:            }
504:
505:            /*
506:             * @see net.refractions.udig.catalog.IResolve#getStatus()
507:             */
508:            public Status getStatus() {
509:                return Status.CONNECTED;
510:            }
511:
512:            /*
513:             * @see net.refractions.udig.catalog.IResolve#getMessage()
514:             */
515:            public Throwable getMessage() {
516:                return null;
517:            }
518:
519:            /*
520:             * @see net.refractions.udig.catalog.IResolve#getIdentifier()
521:             */
522:            public URI getIdentifier() {
523:                return metadata.getSource();
524:            }
525:
526:            //    static class DefaultCatalogInfo extends CatalogInfo {
527:            //    	
528:            //    	 DefaultCatalogInfo() {
529:            //	        super(null, null, null, null);
530:            //	    }
531:            //
532:            //	    /**
533:            //	     * Construct <code>CatalogInfoImpl</code>.
534:            //	     * 
535:            //	     * @param title
536:            //	     * @param description
537:            //	     * @param source
538:            //	     * @param keywords
539:            //	     */
540:            //	    public DefaultCatalogInfo( String title, String description, URI source, String[] keywords ) {
541:            //	        super(title, description, source, keywords);
542:            //	    }
543:            //	    /**
544:            //	     * @param desc The desc to set.
545:            //	     */
546:            //	    void setDesc( String desc ) {
547:            //	        this.description = desc;
548:            //	    }
549:            //	    /**
550:            //	     * @param keywords The keywords to set.
551:            //	     */
552:            //	    void setKeywords( String[] keywords ) {
553:            //	        this.keywords = keywords;
554:            //	    }
555:            //	    /**
556:            //	     * @param source The source to set.
557:            //	     */
558:            //	    void setSource( URI source ) {
559:            //	        this.source = source;
560:            //	    }
561:            //	    /**
562:            //	     * @param title The title to set.
563:            //	     */
564:            //	    void setTitle( String title ) {
565:            //	        this.title = title;
566:            //	    }
567:            //    }
568:        }
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