Source Code Cross Referenced for JDOQueryResultList.java in  » Database-ORM » Speedo_1.4.5 » org » objectweb » speedo » query » jdo » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Database ORM » Speedo_1.4.5 » org.objectweb.speedo.query.jdo 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Speedo: an implementation of JDO compliant personality on top of JORM generic
003:         * I/O sub-system.
004:         * Copyright (C) 2001-2004 France Telecom R&D
005:         *
006:         * This library is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU Lesser General Public
008:         * License as published by the Free Software Foundation; either
009:         * version 2 of the License, or (at your option) any later version.
010:         *
011:         * This library is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         * Lesser General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU Lesser General Public
017:         * License along with this library; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         *
021:         *
022:         * Contact: speedo@objectweb.org
023:         *
024:         * Authors: S. Chassande-Barrioz
025:         *
026:         */package org.objectweb.speedo.query.jdo;
027:
028:        import java.util.ArrayList;
029:        import java.util.Collection;
030:        import java.util.Collections;
031:        import java.util.Iterator;
032:        import java.util.List;
033:        import java.util.ListIterator;
034:        import java.util.NoSuchElementException;
035:
036:        import javax.jdo.JDOUnsupportedOptionException;
037:        import javax.jdo.JDOUserException;
038:        import javax.jdo.PersistenceManager;
039:
040:        import org.objectweb.medor.api.MedorException;
041:        import org.objectweb.medor.tuple.api.TupleCollection;
042:        import org.objectweb.speedo.api.SpeedoException;
043:        import org.objectweb.util.monolog.api.BasicLevel;
044:        import org.objectweb.util.monolog.api.Logger;
045:
046:        /**
047:         * is the result of a JDO query. The result is exported as a java.util.List. 
048:         * This implementation supports user class or persistent class as query result.
049:         * This implementation does not supports simultaneous iterations.  
050:         *
051:         * @author S.Chassande-Barrioz
052:         */
053:        public class JDOQueryResultList extends JDOQueryResultCommon implements 
054:                List {
055:
056:            /**
057:             * if all values are loaded, this field represents the result of the query.
058:             */
059:            private List values = null;
060:
061:            /**
062:             * Is the current iteraor over the query result.
063:             */
064:            private QueryIterator iterator;
065:
066:            /**
067:             * Builds a QueryResultList.
068:             * @param _tc the tuple collection representing the query result
069:             * @param _pm is the peristence manager linked to the query
070:             * @param _conns is the connection to the underlying support to close in 
071:             * same time than the query.
072:             * @param _resultClazz is the class encapsulated the result
073:             */
074:            public JDOQueryResultList(TupleCollection _tc,
075:                    PersistenceManager _pm, Object[] _conns,
076:                    Class _resultClazz, Class[] _selectedFieldTypes,
077:                    boolean staticFirstElementIndex,
078:                    boolean returnIdentifierOnly, Logger _logger)
079:                    throws MedorException, SpeedoException {
080:                super (_tc, _pm, _conns, _resultClazz, _selectedFieldTypes,
081:                        staticFirstElementIndex, returnIdentifierOnly, _logger);
082:            }
083:
084:            /**
085:             * 
086:             * @return true if the calculation of the next element can be done, 
087:             * otherwise false.
088:             */
089:            protected boolean assertNotClosed() {
090:                return pm != null;
091:            }
092:
093:            /**
094:             * @return true if the query has not been closed
095:             */
096:            protected boolean assertBeforeNext() {
097:                return pm != null && !pm.isClosed();
098:            }
099:
100:            /**
101:             * Computes the query result.
102:             */
103:            protected List getList() {
104:                if (!assertNotClosed()) {
105:                    throw new JDOUserException(
106:                            "Impossible to use a closed query result");
107:                }
108:                if (!assertBeforeNext()) {
109:                    throw new JDOUserException(
110:                            "Impossible to use a query result without opened persistence manager");
111:                }
112:                if (values != null)
113:                    return values;
114:
115:                values = new ArrayList();
116:                try {
117:                    if (!tc.isEmpty()) {
118:                        tc.first();
119:                        do {
120:                            Object o = getValue(tc.getTuple());
121:                            if (o != null) {
122:                                values.add(o);
123:                            }
124:                        } while (tc.next());
125:                    }
126:                } catch (MedorException me) {
127:                    values = null;
128:                    throw new JDOUnsupportedOptionException(
129:                            "Persistence manager problem to get result",
130:                            new Exception[] { me });
131:                }
132:                return values;
133:            }
134:
135:            private class QueryIterator implements  Iterator {
136:
137:                private Object next;
138:                private int idx = 0;
139:
140:                public QueryIterator() {
141:                    try {
142:                        tc.first();
143:                        if (assertBeforeNext()) {
144:                            calculateNext(true);
145:                        } else {
146:                            next = null;
147:                        }
148:                    } catch (MedorException e) {
149:                        next = null;
150:                    }
151:                }
152:
153:                public void desactivate() {
154:                    next = null;
155:                }
156:
157:                public boolean hasNext() {
158:                    return next != null;
159:                }
160:
161:                public Object next() {
162:                    if (next == null) {
163:                        throw new NoSuchElementException("No such element");
164:                    }
165:                    Object res = next;
166:                    calculateNext(false);
167:                    return res;
168:                }
169:
170:                private void calculateNext(boolean isfirst) {
171:                    boolean first = isfirst;
172:                    next = null;
173:                    try {
174:                        while (next == null && (first || tc.next())) {
175:                            first = false;
176:                            next = getValue(tc.getTuple());
177:                        }
178:                    } catch (MedorException e) {
179:                        logger.log(BasicLevel.ERROR,
180:                                "Impossible to fetch the pname", e);
181:                        throw new NoSuchElementException(e.getMessage());
182:                    }
183:                }
184:
185:                public void remove() {
186:                    throw new UnsupportedOperationException(
187:                            "This method is not supported in this implementation");
188:                }
189:            }
190:
191:            // IMPLEMENTATION OF THE Collection INTERFACE //
192:            //--------------------------------------------//
193:
194:            /**
195:             * Ensures that this collection contains the specified element
196:             * (optional operation).
197:             */
198:            public boolean add(Object o) {
199:                throw new JDOUnsupportedOptionException(
200:                        "This method is not supported in this implementation");
201:            }
202:
203:            /**
204:             * Adds all of the elements in the specified collection to this collection
205:             * (optional operation).
206:             */
207:            public boolean addAll(Collection c) {
208:                throw new JDOUnsupportedOptionException(
209:                        "This method is not supported in this implementation");
210:            }
211:
212:            /**
213:             * Removes all of the elements from this collection
214:             * (optional operation).
215:             */
216:            public void clear() {
217:                throw new JDOUnsupportedOptionException(
218:                        "This method is not supported in this implementation");
219:            }
220:
221:            /**
222:             * Returns true if this collection contains the specified element.
223:             */
224:            public boolean contains(Object o) {
225:                return indexOf(o) != -1;
226:            }
227:
228:            /**
229:             * Returns true if this collection contains all of the elements in the
230:             * specified collection.
231:             */
232:            public boolean containsAll(Collection c) {
233:                if (values != null) {
234:                    return values.containsAll(c);
235:                }
236:                ArrayList tofind = new ArrayList(c);
237:                for (Iterator it = iterator(); it.hasNext()
238:                        && !tofind.isEmpty();) {
239:                    Object current = it.next();
240:                    boolean found = false;
241:                    for (Iterator iter = tofind.iterator(); iter.hasNext()
242:                            && !found;) {
243:                        Object o = iter.next();
244:                        if ((o == null && current == null)
245:                                || (o != null && o.equals(current))) {
246:                            found = true;
247:                            iter.remove();
248:                        }
249:                    }
250:                    if (!found) {
251:                        return false;
252:                    }
253:                }
254:                return true;
255:            }
256:
257:            /**
258:             * Compares the specified object with this collection for equality.
259:             */
260:            public boolean equals(Object o) {
261:                throw new JDOUnsupportedOptionException(
262:                        "This method is not supported in this implementation");
263:            }
264:
265:            /**
266:             * Returns the hash code value for this collection.
267:             */
268:            public int hashCode() {
269:                return getList().hashCode();
270:            }
271:
272:            /**
273:             * Returns true if this collection contains no elements.
274:             */
275:            public boolean isEmpty() {
276:                try {
277:                    return tc == null || tc.isEmpty();
278:                } catch (MedorException me) {
279:                    throw new JDOUnsupportedOptionException(
280:                            "a MedorException has been catched",
281:                            new Exception[] { me });
282:                }
283:            }
284:
285:            /**
286:             * Returns an iterator over the elements in this collection.
287:             */
288:            public Iterator iterator() {
289:                if (iterator != null) {
290:                    iterator.desactivate();
291:                }
292:                iterator = new QueryIterator();
293:                return iterator;
294:            }
295:
296:            /**
297:             * Removes a single instance of the specified element from this collection,
298:             * if it is present (optional operation).
299:             */
300:            public boolean remove(Object o) {
301:                throw new JDOUnsupportedOptionException(
302:                        "This method is not supported in this implementation");
303:            }
304:
305:            /**
306:             * Removes all this collection's elements that are also contained in the
307:             * specified collection (optional operation).
308:             */
309:            public boolean removeAll(Collection c) {
310:                throw new JDOUnsupportedOptionException(
311:                        "This method is not supported in this implementation");
312:            }
313:
314:            /**
315:             * Retains only the elements in this collection that are contained in the
316:             * specified collection (optional operation).
317:             */
318:            public boolean retainAll(Collection c) {
319:                throw new JDOUnsupportedOptionException(
320:                        "This method is not supported in this implementation");
321:            }
322:
323:            /**
324:             * Returns the number of elements in this collection.
325:             */
326:            public int size() {
327:                return getList().size();
328:            }
329:
330:            /**
331:             * Returns an array containing all of the elements in this collection.
332:             */
333:            public Object[] toArray() {
334:                return getList().toArray();
335:            }
336:
337:            /**
338:             * Returns an array containing all of the elements in this collection whose
339:             * runtime type is that of the specified array.
340:             */
341:            public Object[] toArray(Object[] a) {
342:                return getList().toArray(a);
343:            }
344:
345:            public void add(int index, Object element) {
346:                throw new JDOUnsupportedOptionException(
347:                        "This method is not supported in this implementation");
348:            }
349:
350:            public boolean addAll(int index, Collection c) {
351:                throw new JDOUnsupportedOptionException(
352:                        "This method is not supported in this implementation");
353:            }
354:
355:            public Object get(int index) {
356:                if (values != null) {
357:                    return values.get(index);
358:                } else {
359:                    int i = -1;
360:                    Object current = null;
361:                    for (Iterator it = iterator(); it.hasNext() && i < index; i++) {
362:                        current = it.next();
363:                    }
364:                    if (i == index) {
365:                        return current;
366:                    } else {
367:                        return null;
368:                    }
369:                }
370:            }
371:
372:            public int indexOf(Object o) {
373:                if (values != null) {
374:                    return values.indexOf(o);
375:                }
376:                int i = 0;
377:                for (Iterator it = iterator(); it.hasNext(); i++) {
378:                    Object current = it.next();
379:                    if ((o == null && current == null)
380:                            || (o != null && o.equals(current))) {
381:                        return i;
382:                    }
383:                }
384:                return -1;
385:            }
386:
387:            public int lastIndexOf(Object o) {
388:                return getList().lastIndexOf(o);
389:            }
390:
391:            public ListIterator listIterator() {
392:                return listIterator(0);
393:            }
394:
395:            public ListIterator listIterator(int index) {
396:                if (values != null) {
397:                    return values.listIterator();
398:                } else if (index == 0) {
399:                    return getList().listIterator();
400:                } else {
401:                    //TODO: implement listIterator(int) efficiency
402:                    return getList().listIterator(index);
403:                }
404:            }
405:
406:            public Object remove(int index) {
407:                throw new JDOUnsupportedOptionException(
408:                        "This method is not supported in this implementation");
409:            }
410:
411:            public Object set(int index, Object element) {
412:                throw new JDOUnsupportedOptionException(
413:                        "This method is not supported in this implementation");
414:            }
415:
416:            public List subList(int fromIndex, int toIndex) {
417:                if (toIndex < fromIndex) {
418:                    throw new IllegalArgumentException("toIndex(" + toIndex
419:                            + ") < fromIndex(" + fromIndex + ")");
420:                } else if (toIndex == fromIndex) {
421:                    return Collections.EMPTY_LIST;
422:                } else if (values != null) {
423:                    return values.subList(fromIndex, toIndex);
424:                } else {
425:                    ArrayList result = new ArrayList();
426:                    int i = -1;
427:                    for (Iterator it = iterator(); it.hasNext() && i < toIndex; i++) {
428:                        Object current = it.next();
429:                    }
430:                    return null;
431:                }
432:            }
433:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.