Source Code Cross Referenced for GeodatabaseOjb.java in  » GIS » GeOxygene-1.3 » fr » ign » cogit » geoxygene » datatools » ojb » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeOxygene 1.3 » fr.ign.cogit.geoxygene.datatools.ojb 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the GeOxygene project source files. 
003:         * 
004:         * GeOxygene aims at providing an open framework which implements OGC/ISO specifications for 
005:         * the development and deployment of geographic (GIS) applications. It is a open source 
006:         * contribution of the COGIT laboratory at the Institut Géographique National (the French 
007:         * National Mapping Agency).
008:         * 
009:         * See: http://oxygene-project.sourceforge.net 
010:         *  
011:         * Copyright (C) 2005 Institut Géographique National
012:         *
013:         * This library is free software; you can redistribute it and/or modify it under the terms
014:         * of the GNU Lesser General Public License as published by the Free Software Foundation; 
015:         * either version 2.1 of the License, or any later version.
016:         *
017:         * This library is distributed in the hope that it will be useful, but WITHOUT ANY 
018:         * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
019:         * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
020:         *
021:         * You should have received a copy of the GNU Lesser General Public License along with 
022:         * this library (see file LICENSE if present); if not, write to the Free Software 
023:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024:         *  
025:         */
026:
027:        package fr.ign.cogit.geoxygene.datatools.ojb;
028:
029:        import java.sql.Connection;
030:        import java.sql.ResultSet;
031:        import java.sql.ResultSetMetaData;
032:        import java.sql.Statement;
033:        import java.util.ArrayList;
034:        import java.util.Iterator;
035:        import java.util.List;
036:
037:        import org.apache.ojb.broker.PersistenceBroker;
038:        import org.apache.ojb.broker.metadata.ClassDescriptor;
039:        import org.apache.ojb.broker.metadata.DescriptorRepository;
040:        import org.apache.ojb.broker.metadata.FieldDescriptor;
041:        import org.apache.ojb.odmg.HasBroker;
042:        import org.apache.ojb.odmg.OJB;
043:        import org.odmg.DList;
044:        import org.odmg.Database;
045:        import org.odmg.Implementation;
046:        import org.odmg.OQLQuery;
047:        import org.odmg.Transaction;
048:
049:        import fr.ign.cogit.geoxygene.datatools.Metadata;
050:        import fr.ign.cogit.geoxygene.feature.FT_Feature;
051:        import fr.ign.cogit.geoxygene.feature.FT_FeatureCollection;
052:
053:        /** 
054:         * Implementation d'une Geodatabase utilisant OJB comme mappeur.
055:         * On utilise la partie ODMG de OJB.
056:         * Ne pas utiliser directement :
057:         * classe a specialiser en fonction du SGBD geographique utilise.
058:         * Attention pour les entiers : 
059:         * pour Oracle, caster en BigDecimal,
060:         * pour Postgis caster en Long ...
061:         *
062:         * @author Thierry Badard & Arnaud Braun
063:         * @version 1.1
064:         */
065:
066:        public class GeodatabaseOjb {
067:
068:            /////////////////////////////////////////////////////////////////////////////////////////
069:            ///// attributs /////////////////////////////////////////////////////////////////////////
070:            /////////////////////////////////////////////////////////////////////////////////////////    
071:            protected Connection _conn; // connection JDBC
072:            protected Implementation _odmg; // implementation ODMG
073:            protected Database _db; // interaction avec une base ODMG
074:            protected Transaction _tx; // represente une transaction
075:            protected List _metadataList; // liste des metadonnnees pour les classes persistantes.
076:
077:            /////////////////////////////////////////////////////////////////////////////////////////
078:            ///// constructeur //////////////////////////////////////////////////////////////////////
079:            /////////////////////////////////////////////////////////////////////////////////////////        
080:            /** Constructeur.  
081:             * @param jcdAlias : l'alias de connection dans repository_database.xml */
082:            GeodatabaseOjb(String jcdAlias) {
083:                initODMG(jcdAlias);
084:                initConnection();
085:                initMetadata();
086:            }
087:
088:            /** Constructeur avec la connection par defaut dans repository_database.xml */
089:            protected GeodatabaseOjb() {
090:                this (null);
091:            }
092:
093:            /////////////////////////////////////////////////////////////////////////////////////
094:            /// initialisation des attributs ////////////////////////////////////////////////////
095:            /////////////////////////////////////////////////////////////////////////////////////
096:            /** Initialise la base ODMG et une transaction */
097:            protected void initODMG(String jcdAlias) {
098:                try {
099:                    _odmg = OJB.getInstance();
100:                    _db = _odmg.newDatabase();
101:                    if (jcdAlias != null)
102:                        _db.open(jcdAlias, Database.OPEN_READ_WRITE);
103:                    else
104:                        _db.open(null, Database.OPEN_READ_WRITE);
105:                    _tx = _odmg.newTransaction();
106:                } catch (Exception except) {
107:                    System.err
108:                            .println(" ### PROBLEME A LA LECTURE DES FICHIERS DE MAPPING OJB ... ### ");
109:                    System.err.println(" ### PROGRAMME ARRETE ! ### ");
110:                    System.err.println("");
111:                    except.printStackTrace();
112:                    System.exit(0);
113:                }
114:            }
115:
116:            /** Initialise la connection JDBC. */
117:            protected void initConnection() {
118:                try {
119:                    _tx.begin();
120:                    PersistenceBroker broker = ((HasBroker) _tx).getBroker();
121:                    _conn = broker.serviceConnectionManager().getConnection();
122:                    _tx.commit();
123:                } catch (Exception e) {
124:                    e.printStackTrace();
125:                }
126:            }
127:
128:            /** Renseigne l'attribut _metadataList. */
129:            protected void initMetadata() {
130:                try {
131:                    _tx.begin();
132:                    PersistenceBroker broker = ((HasBroker) _tx).getBroker();
133:                    DescriptorRepository desc = broker
134:                            .getDescriptorRepository();
135:                    Iterator enDesc = desc.getDescriptorTable().values()
136:                            .iterator();
137:                    _metadataList = new ArrayList();
138:
139:                    while (enDesc.hasNext()) {
140:                        ClassDescriptor cd = (ClassDescriptor) enDesc.next();
141:                        String className = (cd.getClassNameOfObject());
142:                        if (!(className
143:                                .equals("org.apache.ojb.broker.util.sequence.HighLowSequence")
144:                                || className
145:                                        .equals("org.apache.ojb.odmg.collections.DListImpl_2")
146:                                || className
147:                                        .equals("org.apache.ojb.odmg.collections.DListEntry_2")
148:                                || className
149:                                        .equals("org.apache.ojb.odmg.collections.DListImpl") || className
150:                                .equals("org.apache.ojb.odmg.collections.DListEntry"))) {
151:                            Metadata metadataElt = new Metadata();
152:                            metadataElt.setClassName(className);
153:                            metadataElt.setTableName(cd.getFullTableName());
154:                            FieldDescriptor[] fdPK = cd.getPkFields();
155:                            if (fdPK.length == 0) {
156:                                System.out
157:                                        .println("WARNING - classe sans identifiant : "
158:                                                + cd.getClassNameOfObject());
159:                                continue;
160:                            }
161:                            if (fdPK.length > 1) {
162:                                if (cd
163:                                        .getClassNameOfObject()
164:                                        .compareToIgnoreCase(
165:                                                "org.apache.ojb.broker.util.sequence.HighLowSequence") != 0)
166:                                    System.out
167:                                            .println("WARNING - cle primaire composee : "
168:                                                    + cd.getClassNameOfObject());
169:                                continue;
170:                            }
171:                            metadataElt
172:                                    .setIdColumnName(fdPK[0].getColumnName());
173:                            metadataElt.setIdFieldName(fdPK[0]
174:                                    .getAttributeName());
175:                            _metadataList.add(metadataElt);
176:                        }
177:                    }
178:                    _tx.commit();
179:
180:                } catch (Exception e) {
181:                    System.err
182:                            .println(" ### PROBLEME A LA LECTURE DES FICHIERS DE MAPPING OJB ... ### ");
183:                    System.err.println(" ### PROGRAMME ARRETE ! ### ");
184:                    System.err.println("");
185:                    e.printStackTrace();
186:                    System.exit(0);
187:                }
188:            }
189:
190:            /////////////////////////////////////////////////////////////////////////////////////////
191:            ///// gestion des transactions //////////////////////////////////////////////////////////
192:            /////////////////////////////////////////////////////////////////////////////////////////        
193:            /** Ouvre une transaction. */
194:            public void begin() {
195:                try {
196:                    _tx.begin();
197:                } catch (Exception e) {
198:                    e.printStackTrace();
199:                }
200:            }
201:
202:            /** Commit la transaction sans la fermer. */
203:            public void checkpoint() {
204:                try {
205:                    _tx.checkpoint();
206:                } catch (Exception e) {
207:                    e.printStackTrace();
208:                }
209:            }
210:
211:            /** Commite et ferme la transaction. */
212:            public void commit() {
213:                try {
214:                    _tx.commit();
215:                } catch (Exception e) {
216:                    e.printStackTrace();
217:                }
218:            }
219:
220:            /** Annule et ferme la transaction. */
221:            public void abort() {
222:                try {
223:                    _tx.abort();
224:                } catch (Exception e) {
225:                    e.printStackTrace();
226:                }
227:            }
228:
229:            /** Renvoie true si la transaction est active. */
230:            public boolean isOpen() {
231:                return _tx.isOpen();
232:            }
233:
234:            /** Ferme la connection (libere les ressources). */
235:            public void close() {
236:                try {
237:                    _db.close();
238:                } catch (Exception e) {
239:                    e.printStackTrace();
240:                }
241:            }
242:
243:            /** Vide le cache de la transaction.
244:             A appeler a l'interieur d'une transaction ouverte. */
245:            public void clearCache() {
246:                PersistenceBroker broker = ((HasBroker) _tx).getBroker();
247:                broker.clearCache();
248:            }
249:
250:            /////////////////////////////////////////////////////////////////////////////////////////
251:            ///// gestion de la persistance /////////////////////////////////////////////////////////
252:            /////////////////////////////////////////////////////////////////////////////////////////        
253:            /** Rend persistant un objet. 
254:                A appeler a l'interieur d'une transaction ouverte.*/
255:            public void makePersistent(Object obj) {
256:                try {
257:                    _db.makePersistent(obj);
258:                } catch (Exception e) {
259:                    e.printStackTrace();
260:                }
261:            }
262:
263:            /** Detruit un objet persistant. 
264:                A appeler a l'interieur d'une transaction ouverte. */
265:            public void deletePersistent(Object obj) {
266:                try {
267:                    _db.deletePersistent(obj);
268:                } catch (Exception e) {
269:                    e.printStackTrace();
270:                }
271:            }
272:
273:            /////////////////////////////////////////////////////////////////////////////////////////
274:            ///// chargement d'objets ///////////////////////////////////////////////////////////////
275:            /////////////////////////////////////////////////////////////////////////////////////////
276:            /** Charge l'objet d'identifiant id. 
277:                Passer un Integer pour id, si l'identifiant est un int.
278:                Renvoie null si l'objet d'identifiant id n'existe pas.*
279:                A appeler a l'interieur d'une transaction ouverte. */
280:            public java.lang.Object load(Class clazz, Object id) {
281:                try {
282:                    OQLQuery query = _odmg.newOQLQuery();
283:                    query.create("select x from " + clazz.getName()
284:                            + " where id = $0");
285:                    query.bind(id);
286:                    DList result = (DList) query.execute();
287:                    if (result.size() > 0)
288:                        return result.get(0);
289:                    else {
290:                        System.out.println("objet non trouve - id = " + id);
291:                        return null;
292:                    }
293:                } catch (Exception ee) {
294:                    ee.printStackTrace();
295:                    return null;
296:                }
297:            }
298:
299:            /** Charge tous les objets persistants de la classe theClass et les met dans une liste.
300:                A appeler a l'interieur d'une transaction ouverte. */
301:            public List loadAll(Class theClass) {
302:                try {
303:                    OQLQuery query = _odmg.newOQLQuery();
304:                    query.create("select x from " + theClass.getName());
305:                    DList result = (DList) query.execute();
306:                    return result;
307:                } catch (Exception e) {
308:                    e.printStackTrace();
309:                    return null;
310:                }
311:            }
312:
313:            /** Charge tous les FT_Feature de la classe theClass dans la classe FT_FeatureCollection.
314:            	A appeler a l'interieur d'une transaction ouverte. 
315:            	La classe theClass doit etre une sous-classe de FT_Feature, sinon renvoie une liste vide. */
316:            public FT_FeatureCollection loadAllFeatures(Class featureClass) {
317:                FT_FeatureCollection result = new FT_FeatureCollection();
318:                if ((FT_Feature.class).isAssignableFrom(featureClass)) {
319:                    try {
320:                        OQLQuery query = _odmg.newOQLQuery();
321:                        query.create("select x from " + featureClass.getName());
322:                        DList list = (DList) query.execute();
323:                        Iterator iter = list.iterator();
324:                        while (iter.hasNext()) {
325:                            FT_Feature feature = (FT_Feature) iter.next();
326:                            result.add(feature);
327:                        }
328:                    } catch (Exception e) {
329:                        e.printStackTrace();
330:                    }
331:                } else {
332:                    System.out
333:                            .println("loadAllFeatures() : La classe passee en parametre n'est pas une sous-classe de FT_Feature");
334:                }
335:                return result;
336:            }
337:
338:            /** Charge tous les FT_Feature de la classe theClass dans la classe featureListClass.
339:            	A appeler a l'interieur d'une transaction ouverte. 
340:            	La classe theClass doit etre une sous-classe de FT_Feature, sinon renvoie une liste vide.
341:            	La classe featureListClass doit etre un sous classe de FT_FeatureCollection.*/
342:            public Object loadAllFeatures(Class featureClass,
343:                    Class featureListClass) {
344:                Object result = null;
345:                try {
346:                    result = featureListClass.newInstance();
347:                } catch (Exception e) {
348:                    e.printStackTrace();
349:                }
350:                if ((FT_Feature.class).isAssignableFrom(featureClass)) {
351:                    try {
352:                        OQLQuery query = _odmg.newOQLQuery();
353:                        query.create("select x from " + featureClass.getName());
354:                        DList list = (DList) query.execute();
355:                        Iterator iter = list.iterator();
356:                        while (iter.hasNext()) {
357:                            FT_Feature feature = (FT_Feature) iter.next();
358:                            result.getClass().getMethod("add",
359:                                    new Class[] { FT_Feature.class }).invoke(
360:                                    result, new Object[] { feature });
361:                        }
362:                    } catch (Exception e) {
363:                        e.printStackTrace();
364:                    }
365:                } else {
366:                    System.out
367:                            .println("loadAllFeatures() : La classe passee en parametre n'est pas une sous-classe de FT_Feature");
368:                }
369:                return result;
370:            }
371:
372:            /////////////////////////////////////////////////////////////////////////////////////////
373:            ///// OQL ///////////////////////////////////////////////////////////////////////////////
374:            /////////////////////////////////////////////////////////////////////////////////////////                    
375:            /** Execute la requete OQL query, la lie avec le parametre param, et met le resultat dans une liste.
376:                A appeler a l'interieur d'une transaction ouverte.  
377:                On peut passer null pour param, si on ne souhaite lier la requete a aucune variable. */
378:            public List loadOQL(String query, Object param) {
379:                OQLQuery oqlQuery = _odmg.newOQLQuery();
380:                try {
381:                    oqlQuery.create(query);
382:                    oqlQuery.bind(param);
383:                    DList result = (DList) oqlQuery.execute();
384:                    return result;
385:                } catch (Exception e) {
386:                    e.printStackTrace();
387:                    return null;
388:                }
389:            }
390:
391:            /** Cree une requete OQL */
392:            public OQLQuery newOQLQuery() {
393:                return _odmg.newOQLQuery();
394:            }
395:
396:            /////////////////////////////////////////////////////////////////////////////////////////
397:            ///// Metadonnees sur le mapping ////////////////////////////////////////////////////////
398:            /////////////////////////////////////////////////////////////////////////////////////////    
399:            /** Renvoie le tableau des metadonnees. */
400:            public List getMetadata() {
401:                return _metadataList;
402:            }
403:
404:            /** Renvoie les metadonnees de la classe theClass. 
405:                theClass doit etre une classe definie dans le mapping.*/
406:            public Metadata getMetadata(Class theClass) {
407:                for (int i = 0; i < _metadataList.size(); i++)
408:                    if (theClass.getName().compareTo(
409:                            ((Metadata) _metadataList.get(i)).getClassName()) == 0)
410:                        return (Metadata) _metadataList.get(i);
411:                System.out
412:                        .println("La classe n'est pas dans le fichier de mapping : "
413:                                + theClass.getName());
414:                return null;
415:            }
416:
417:            /** Renvoie les metadonnees de la classe mappee avec la table theTable.
418:                theTable doit etre une table definie dans le mapping. 
419:                Si theTable est mappee avec plusieurs classes, en renvoie une. */
420:            public Metadata getMetadata(String theTable) {
421:                for (int i = 0; i < _metadataList.size(); i++)
422:                    if (((Metadata) _metadataList.get(i)).getTableName() != null)
423:                        if (theTable
424:                                .compareToIgnoreCase(((Metadata) _metadataList
425:                                        .get(i)).getTableName()) == 0)
426:                            return (Metadata) _metadataList.get(i);
427:                System.out
428:                        .println("La table n'est pas dans le fichier de mapping : "
429:                                + theTable);
430:                return null;
431:            }
432:
433:            /////////////////////////////////////////////////////////////////////////////////////////
434:            ///// SQL ///////////////////////////////////////////////////////////////////////////////
435:            /////////////////////////////////////////////////////////////////////////////////////////
436:            /** Renvoie la connection JDBC sous-jacente. */
437:            public Connection getConnection() {
438:                return _conn;
439:            }
440:
441:            /** Execute une commande SQL.
442:                Cette commande ne doit pas renvoyer de resultat : INSERT, UPDATE, DELETE, mais pas SELECT. */
443:            public void exeSQL(String query) {
444:                try {
445:                    Connection conn = getConnection();
446:                    Statement stm = conn.createStatement();
447:                    stm.executeQuery(query);
448:                    stm.close();
449:                    conn.commit();
450:                } catch (Exception e) {
451:                    e.printStackTrace();
452:                }
453:            }
454:
455:            /** Execute une requete et met les resultats dans une liste de tableau d'objets.
456:                Les tableaux ont la taille du nombre d'objets demandes dans le SELECT.
457:                Exemple d'utilisation du resultat : 
458:                <tt> List edges = db.exeSQLQuery("SELECT edgeID FROM tableName WHERE ..."). </tt>
459:                Pour recuperer le premier resultat :
460:                <tt> edgeId = ( (BigDecimal) ((Object[]) (edges.get(0)) )[0] ).intValue(); </tt>  */
461:            public List exeSQLQuery(String query) {
462:                List result = new ArrayList();
463:                try {
464:                    Connection conn = getConnection();
465:                    Statement stm = conn.createStatement();
466:                    ResultSet rs = (ResultSet) stm.executeQuery(query);
467:                    ResultSetMetaData rsmd = rs.getMetaData();
468:                    int nbCol = rsmd.getColumnCount();
469:                    while (rs.next()) {
470:                        Object[] array = new Object[nbCol];
471:                        for (int i = 1; i <= nbCol; i++)
472:                            array[i - 1] = rs.getObject(i);
473:                        result.add(array);
474:                    }
475:                    stm.close();
476:                } catch (Exception e) {
477:                    e.printStackTrace();
478:                }
479:                return result;
480:            }
481:
482:            ///////////////////////////////////////////////////////////////////////////////////////////////////////////
483:            // getters ODMG ///////////////////////////////////////////////////////////////////////////////////////////
484:            /////////////////////////////////////////////////////////////////////////////////////////////////////////// 
485:            public Implementation getODMGImplementation() {
486:                return _odmg;
487:            }
488:
489:            public Database getODMGDatabase() {
490:                return _db;
491:            }
492:
493:            public Transaction getODMGTransaction() {
494:                return _tx;
495:            }
496:
497:        }
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