Source Code Cross Referenced for AbstractField.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » amber » field » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.amber.field 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *
023:         *   Free Software Foundation, Inc.
024:         *   59 Temple Place, Suite 330
025:         *   Boston, MA 02111-1307  USA
026:         *
027:         * @author Scott Ferguson
028:         */
029:
030:        package com.caucho.amber.field;
031:
032:        import com.caucho.amber.expr.AmberExpr;
033:        import com.caucho.amber.expr.PathExpr;
034:        import com.caucho.amber.manager.AmberConnection;
035:        import com.caucho.amber.manager.AmberPersistenceUnit;
036:        import com.caucho.amber.query.QueryParser;
037:        import com.caucho.amber.table.Table;
038:        import com.caucho.amber.table.Column;
039:        import com.caucho.amber.type.AbstractStatefulType;
040:        import com.caucho.amber.type.RelatedType;
041:        import com.caucho.bytecode.JClass;
042:        import com.caucho.bytecode.JClassWrapper;
043:        import com.caucho.bytecode.JField;
044:        import com.caucho.bytecode.JMethod;
045:        import com.caucho.bytecode.JType;
046:        import com.caucho.config.ConfigException;
047:        import com.caucho.java.JavaWriter;
048:        import com.caucho.log.Log;
049:        import com.caucho.util.CharBuffer;
050:        import com.caucho.util.L10N;
051:
052:        import java.io.IOException;
053:        import java.io.Serializable;
054:        import java.sql.SQLException;
055:        import java.util.ArrayList;
056:        import java.util.HashSet;
057:        import java.util.logging.Level;
058:        import java.util.logging.Logger;
059:
060:        /**
061:         * Configuration for a bean's property
062:         */
063:        abstract public class AbstractField implements  AmberField {
064:            private static final L10N L = new L10N(AbstractField.class);
065:            protected static final Logger log = Log.open(AbstractField.class);
066:
067:            AbstractStatefulType _sourceType;
068:
069:            private String _name;
070:
071:            private JType _javaType;
072:
073:            private JMethod _getterMethod;
074:            private JMethod _setterMethod;
075:
076:            private boolean _isLazy = true;
077:
078:            private int _updateIndex;
079:            private int _loadGroupIndex = -1;
080:
081:            AbstractField(AbstractStatefulType sourceType) {
082:                _sourceType = sourceType;
083:            }
084:
085:            AbstractField(AbstractStatefulType sourceType, String name)
086:                    throws ConfigException {
087:                this (sourceType);
088:
089:                if (log.isLoggable(Level.FINER)) {
090:                    log.log(Level.FINER, sourceType + " "
091:                            + getClass().getSimpleName() + "[" + name + "]");
092:                }
093:
094:                setName(name);
095:            }
096:
097:            /**
098:             * Sets the name.
099:             */
100:            public void setName(String name) throws ConfigException {
101:                _name = name;
102:
103:                if (!isFieldAccess()) {
104:                    char ch = name.charAt(0);
105:                    if (Character.isLowerCase(ch))
106:                        name = Character.toUpperCase(ch) + name.substring(1);
107:
108:                    String getter = "get" + name;
109:                    String setter = "set" + name;
110:
111:                    _getterMethod = AbstractStatefulType.getGetter(
112:                            getBeanClass(), getter);
113:
114:                    if (_getterMethod == null) {
115:                        getter = "is" + name;
116:                        _getterMethod = AbstractStatefulType.getGetter(
117:                                getBeanClass(), getter);
118:                    }
119:
120:                    /* jpa/0u21
121:                    if (_getterMethod == null)
122:                      throw new ConfigException(L.l("{0}: {1} has no matching getter.",
123:                                                    getBeanClass().getName(), name));
124:                     */
125:
126:                    if (_getterMethod == null) {
127:                        JField field = AbstractStatefulType.getField(
128:                                getBeanClass(), _name);
129:
130:                        if (field == null)
131:                            throw new ConfigException(L.l(
132:                                    "{0}: {1} has no matching field.",
133:                                    getBeanClass().getName(), _name));
134:
135:                        _javaType = field.getGenericType();
136:                    } else {
137:                        _javaType = _getterMethod.getGenericReturnType();
138:
139:                        _setterMethod = AbstractStatefulType.getSetter(
140:                                getBeanClass(), setter);
141:                    }
142:                } else {
143:                    JField field = AbstractStatefulType.getField(
144:                            getBeanClass(), name);
145:
146:                    if (field == null)
147:                        throw new ConfigException(L.l(
148:                                "{0}: {1} has no matching field.",
149:                                getBeanClass().getName(), name));
150:
151:                    _javaType = field.getGenericType();
152:                }
153:
154:                /*
155:                  if (_setterMethod == null && ! isAbstract())
156:                  throw new ConfigException(L.l("{0}: {1} has no matching setter.",
157:                  getBeanClass().getName(), name));
158:                 */
159:            }
160:
161:            /**
162:             * Returns the field name.
163:             */
164:            public String getName() {
165:                return _name;
166:            }
167:
168:            /**
169:             * Sets the java type.
170:             */
171:            protected void setJavaType(JType type) {
172:                _javaType = type;
173:            }
174:
175:            /**
176:             * Sets the java type.
177:             */
178:            protected void setJavaType(Class type) {
179:                setJavaType(new JClassWrapper(type, getPersistenceUnit()
180:                        .getJClassLoader()));
181:            }
182:
183:            /**
184:             * Returns the owning entity class.
185:             */
186:            public AbstractStatefulType getSourceType() {
187:                return _sourceType;
188:            }
189:
190:            /**
191:             * Returns the amber manager.
192:             */
193:            public AmberPersistenceUnit getPersistenceUnit() {
194:                return getSourceType().getPersistenceUnit();
195:            }
196:
197:            /**
198:             * Returns the bean class.
199:             */
200:            public JClass getBeanClass() {
201:                return getSourceType().getBeanClass();
202:            }
203:
204:            /**
205:             * Returns the source type as
206:             * entity or mapped-superclass.
207:             */
208:            public RelatedType getEntitySourceType() {
209:                return (RelatedType) getSourceType();
210:            }
211:
212:            /**
213:             * Returns the table containing the field's columns.
214:             */
215:            public Table getTable() {
216:                return getEntitySourceType().getTable();
217:            }
218:
219:            /**
220:             * Returns the column for the field
221:             */
222:            public Column getColumn() {
223:                return null;
224:            }
225:
226:            /**
227:             * Returns the property index.
228:             */
229:            public int getIndex() {
230:                return _updateIndex;
231:            }
232:
233:            /**
234:             * Set the property index.
235:             */
236:            public void setIndex(int index) {
237:                _updateIndex = index;
238:            }
239:
240:            /**
241:             * Returns the property's group index.
242:             */
243:            public int getLoadGroupIndex() {
244:                return _loadGroupIndex;
245:            }
246:
247:            /**
248:             * Returns the property's group index.
249:             */
250:            protected void setLoadGroupIndex(int index) {
251:                _loadGroupIndex = index;
252:            }
253:
254:            /**
255:             * Returns the load group mask.
256:             */
257:            public long getCreateLoadMask(int group) {
258:                int index = getLoadGroupIndex();
259:
260:                if (64 * group <= index && index < 64 * (group + 1))
261:                    return 1L << (index % 64);
262:                else
263:                    return 0;
264:            }
265:
266:            /**
267:             * Returns true for a lazy field.
268:             */
269:            public boolean isLazy() {
270:                return _isLazy;
271:            }
272:
273:            /**
274:             * Set true for a lazy field.
275:             */
276:            public void setLazy(boolean isLazy) {
277:                _isLazy = isLazy;
278:            }
279:
280:            /**
281:             * Returns the getter method.
282:             */
283:            public JMethod getGetterMethod() {
284:                return _getterMethod;
285:            }
286:
287:            /**
288:             * Returns the getter name.
289:             */
290:            public String getGetterName() {
291:                if (isFieldAccess())
292:                    return "__caucho_get_" + getName();
293:                else
294:                    return _getterMethod.getName();
295:            }
296:
297:            /**
298:             * Returns the getter name.
299:             */
300:            public String getJavaTypeName() {
301:                return getJavaType().getPrintName();
302:            }
303:
304:            /**
305:             * Returns the Java code for the type.
306:             */
307:            private String getJavaTypeName(Class cl) {
308:                if (cl.isArray())
309:                    return getJavaTypeName(cl.getComponentType()) + "[]";
310:                else
311:                    return cl.getName();
312:            }
313:
314:            /**
315:             * Returns the field's type
316:             */
317:            public JType getJavaType() {
318:                return _javaType;
319:            }
320:
321:            /**
322:             * Returns the setter method.
323:             */
324:            public JMethod getSetterMethod() {
325:                return _setterMethod;
326:            }
327:
328:            /**
329:             * Returns the setter name.
330:             */
331:            public String getSetterName() {
332:                if (isFieldAccess())
333:                    return "__caucho_set_" + getName();
334:                else if (_setterMethod != null)
335:                    return _setterMethod.getName();
336:                else
337:                    return "set" + getGetterName().substring(3);
338:            }
339:
340:            /**
341:             * Returns true if values are accessed by the fields.
342:             */
343:            public boolean isFieldAccess() {
344:                return getSourceType().isFieldAccess();
345:            }
346:
347:            /**
348:             * Returns true if the methods are abstract.
349:             */
350:            public boolean isAbstract() {
351:                // jpa/0u21
352:
353:                if (isFieldAccess() || getSourceType().isIdClass())
354:                    return true;
355:                else if (_getterMethod == null)
356:                    return false;
357:                else
358:                    return _getterMethod.isAbstract();
359:            }
360:
361:            /**
362:             * Returns true if the field is cascadable.
363:             */
364:            public boolean isCascadable() {
365:                return false;
366:            }
367:
368:            /**
369:             * Returns true if the methods are abstract.
370:             */
371:            public boolean isUpdateable() {
372:                return true;
373:            }
374:
375:            /**
376:             * Initialize the field.
377:             */
378:            public void init() throws ConfigException {
379:                if (_loadGroupIndex < 0) {
380:                    if (_isLazy)
381:                        _loadGroupIndex = getEntitySourceType()
382:                                .nextLoadGroupIndex();
383:                    else
384:                        _loadGroupIndex = getEntitySourceType()
385:                                .getDefaultLoadGroupIndex();
386:                }
387:            }
388:
389:            /**
390:             * Generates the post constructor initialization.
391:             */
392:            public void generatePostConstructor(JavaWriter out)
393:                    throws IOException {
394:            }
395:
396:            /**
397:             * Generates any prologue.
398:             */
399:            public void generatePrologue(JavaWriter out,
400:                    HashSet<Object> completedSet) throws IOException {
401:                if (isAbstract()) {
402:                    out.println();
403:                    out.print("public ");
404:                    out.print(getJavaType().getPrintName());
405:                    out.print(" " + getFieldName() + ";");
406:                }
407:            }
408:
409:            /**
410:             * Generates the select clause for an entity load.
411:             */
412:            public String generateLoadSelect(Table table, String id) {
413:                return null;
414:            }
415:
416:            /**
417:             * Generates the select clause.
418:             */
419:            public String generateSelect(String id) {
420:                return null;
421:            }
422:
423:            /**
424:             * Generates the JPA QL select clause.
425:             */
426:            public String generateJavaSelect(String id) {
427:                return null;
428:            }
429:
430:            /**
431:             * Generates the where clause.
432:             */
433:            public String generateWhere(String id) {
434:                return null;
435:            }
436:
437:            /**
438:             * Generates the where clause.
439:             */
440:            public void generateUpdate(CharBuffer sql) {
441:            }
442:
443:            /**
444:             * Generates loading cache
445:             */
446:            public void generateUpdate(JavaWriter out, String maskVar,
447:                    String pstmt, String index) throws IOException {
448:                int group = getIndex() / 64;
449:                long mask = 1L << getIndex() % 64;
450:
451:                out.println();
452:                out.println("if ((" + maskVar + "_" + group + " & " + mask
453:                        + "L) != 0) {");
454:                out.pushDepth();
455:
456:                generateSet(out, pstmt, index);
457:
458:                out.popDepth();
459:                out.println("}");
460:            }
461:
462:            /**
463:             * Generates loading code
464:             */
465:            public boolean hasLoadGroup(int index) {
466:                return index == _loadGroupIndex;
467:            }
468:
469:            /**
470:             * Generates loading code
471:             */
472:            public int generateLoad(JavaWriter out, String rs, String indexVar,
473:                    int index) throws IOException {
474:                return index;
475:            }
476:
477:            /**
478:             * Generates loading code after the basic fields.
479:             */
480:            public int generatePostLoadSelect(JavaWriter out, int index)
481:                    throws IOException {
482:                return index;
483:            }
484:
485:            /**
486:             * Generates loading cache
487:             */
488:            public void generateLoadFromObject(JavaWriter out, String obj)
489:                    throws IOException {
490:                if (getGetterMethod() == null || getSetterMethod() == null)
491:                    return;
492:
493:                String getter = getGetterName();
494:
495:                String loadVar = "__caucho_loadMask_"
496:                        + (getLoadGroupIndex() / 64);
497:                long loadMask = (1L << getLoadGroupIndex());
498:
499:                out.println("if ((" + loadVar + " & " + loadMask + "L) != 0)");
500:                out.print("  ");
501:
502:                out.println("  " + generateSuperSetter(generateGet(obj)) + ";");
503:            }
504:
505:            /**
506:             * Generates loading cache
507:             */
508:            public void generateSet(JavaWriter out, String obj)
509:                    throws IOException {
510:                out.println(generateSuperSetter(obj) + ";");
511:            }
512:
513:            /**
514:             * Generates loading cache
515:             */
516:            public void generateUpdateFromObject(JavaWriter out, String obj)
517:                    throws IOException {
518:                out.println(generateSuperSetter(generateGet(obj)) + ";");
519:            }
520:
521:            /**
522:             * Generates the field getter.
523:             *
524:             * @param value the non-null value
525:             */
526:            public void generateGet(JavaWriter out, String value)
527:                    throws IOException {
528:                out.print(generateGet(value));
529:            }
530:
531:            /**
532:             * Returns the null value.
533:             */
534:            public String generateNull() {
535:                return "null";
536:            }
537:
538:            /**
539:             * Generates the field getter.
540:             *
541:             * @param value the non-null value
542:             */
543:            public String generateGet(String obj) {
544:                if (obj == null)
545:                    return generateNull();
546:
547:                if (obj.equals("super"))
548:                    return generateSuperGetter();
549:                else if (!isAbstract())
550:                    return obj + "." + _getterMethod.getName() + "()";
551:                else if (_getterMethod != null)
552:                    return obj + "." + _getterMethod.getName() + "()";
553:                else
554:                    return obj + "." + getFieldName();
555:            }
556:
557:            /**
558:             * Generates the field setter.
559:             *
560:             * @param value the non-null value
561:             */
562:            public String generateSet(String obj, String value) {
563:                if (obj.equals("super"))
564:                    return generateSuperSetter(value);
565:                else if (isAbstract()) {
566:                    if (isFieldAccess()) {
567:                        // jpa/0h09
568:                        return obj + "." + getSetterName() + "(" + value + ")";
569:                    }
570:
571:                    return obj + "." + getFieldName() + " = " + value;
572:                } else if (_setterMethod != null)
573:                    return obj + "." + _setterMethod.getName() + "(" + value
574:                            + ")";
575:                else
576:                    return ""; // ejb/0gb9
577:            }
578:
579:            /**
580:             * Returns the field name.
581:             */
582:            protected String getFieldName() {
583:                return "__amber_" + getName();
584:            }
585:
586:            /**
587:             * Generates the insert.
588:             */
589:            public final String generateInsert() {
590:                return null;
591:            }
592:
593:            /**
594:             * Generates the insert.
595:             */
596:            public void generateInsertColumns(ArrayList<String> columns) {
597:            }
598:
599:            /**
600:             * Generates the get property.
601:             */
602:            public void generateGetProperty(JavaWriter out) throws IOException {
603:
604:            }
605:
606:            /**
607:             * Generates the set property.
608:             */
609:            public void generateSetProperty(JavaWriter out) throws IOException {
610:            }
611:
612:            /**
613:             * Returns the actual data.
614:             */
615:            public String generateSuperGetter() {
616:                if (!getSourceType().isEmbeddable())
617:                    return "__caucho_super_get_" + getName() + "()";
618:                else if (isFieldAccess())
619:                    return getName();
620:                else
621:                    return getGetterMethod().getName() + "()";
622:            }
623:
624:            /**
625:             * Sets the actual data.
626:             */
627:            public final String generateSuperSetter(String value) {
628:                return generateSuperSetter("this", value);
629:            }
630:
631:            /**
632:             * Sets the actual data.
633:             */
634:            public String generateSuperSetter(String objThis, String value) {
635:                if (!getSourceType().isEmbeddable())
636:                    return objThis + "." + "__caucho_super_set_" + getName()
637:                            + "(" + value + ")";
638:                else if (isFieldAccess()) {
639:                    return objThis + "." + getName() + " = " + value;
640:                } else {
641:                    return objThis + "." + getSetterMethod().getName() + "("
642:                            + value + ")";
643:                }
644:            }
645:
646:            /**
647:             * Generates the get property.
648:             */
649:            public void generateSuperGetter(JavaWriter out) throws IOException {
650:                out.println();
651:                out.println("public final " + getJavaTypeName()
652:                        + " __caucho_super_get_" + getName() + "()");
653:                out.println("{");
654:                out.pushDepth();
655:
656:                if (isAbstract() || getGetterMethod() == null)
657:                    out.println("return " + getFieldName() + ";");
658:                else
659:                    out.println("return super." + getGetterName() + "();");
660:
661:                out.popDepth();
662:                out.println("}");
663:            }
664:
665:            /**
666:             * Generates the set property.
667:             */
668:            public void generateSuperSetter(JavaWriter out) throws IOException {
669:                out.println();
670:                out.println("public final void __caucho_super_set_" + getName()
671:                        + "(" + getJavaTypeName() + " v)");
672:                out.println("{");
673:                out.pushDepth();
674:
675:                if (isAbstract() || getGetterMethod() == null)
676:                    out.println(getFieldName() + " = v;");
677:                else if (getSetterMethod() != null)
678:                    out
679:                            .println("super." + getSetterMethod().getName()
680:                                    + "(v);");
681:
682:                out.popDepth();
683:                out.println("}");
684:            }
685:
686:            /**
687:             * Generates the table create.
688:             */
689:            public String generateCreateTableSQL(AmberPersistenceUnit manager) {
690:                return null;
691:            }
692:
693:            /**
694:             * Generates the set clause.
695:             */
696:            public void generateSet(JavaWriter out, String pstmt, String index)
697:                    throws IOException {
698:                generateSet(out, pstmt, index, "super");
699:            }
700:
701:            /**
702:             * Generates the set clause for the insert clause.
703:             */
704:            public void generateInsertSet(JavaWriter out, String pstmt,
705:                    String index, String obj) throws IOException {
706:                generateSet(out, pstmt, index, obj);
707:            }
708:
709:            /**
710:             * Generates the set clause for the insert clause.
711:             */
712:            public void generateUpdateSet(JavaWriter out, String pstmt,
713:                    String index, String obj) throws IOException {
714:                generateSet(out, pstmt, index, obj);
715:            }
716:
717:            /**
718:             * Updates the cached copy.
719:             */
720:            public void generateCopyUpdateObject(JavaWriter out, String dst,
721:                    String src, int updateIndex) throws IOException {
722:                // commented out: jpa/0l03
723:
724:                if (getIndex() == updateIndex) {
725:                    String value = generateGet(src);
726:                    out.println(generateSet(dst, value) + ";");
727:                }
728:            }
729:
730:            /**
731:             * Updates the cached copy.
732:             */
733:            public void generateCopyLoadObject(JavaWriter out, String dst,
734:                    String src, int loadIndex) throws IOException {
735:                // jpa/0g0l
736:                if (getLoadGroupIndex() != loadIndex)
737:                    return;
738:
739:                String value = generateGet(src);
740:
741:                // jpa/0l43 out.println(generateSet(dst, value) + ";");
742:
743:                boolean isJPA = getEntitySourceType().getPersistenceUnit()
744:                        .isJPA();
745:
746:                if (isJPA
747:                        && !(dst.equals("cacheEntity") || dst.equals("super") || dst
748:                                .equals("item"))) {
749:                    // jpa/0j5fn: merge()
750:                    out.println("if (isFullMerge)");
751:                    out.println("  " + generateSet(dst, value) + ";");
752:                    out.println("else");
753:                    out.print("  ");
754:                }
755:
756:                if (!dst.equals("super"))
757:                    out.println(generateSuperSetter(dst, value) + ";");
758:                else
759:                    out.println(generateSuperSetter("this", value) + ";");
760:            }
761:
762:            /**
763:             * Updates the cached copy.
764:             */
765:            public void generateCopyMergeObject(JavaWriter out, String dst,
766:                    String src, int loadIndex) throws IOException {
767:            }
768:
769:            /**
770:             * Checks entity-relationships from an object.
771:             */
772:            public void generateDumpRelationships(JavaWriter out,
773:                    int updateIndex) throws IOException {
774:            }
775:
776:            /**
777:             * Generates the set clause.
778:             */
779:            public void generateSet(JavaWriter out, String pstmt, String index,
780:                    String obj) throws IOException {
781:            }
782:
783:            /**
784:             * Converts to an object.
785:             */
786:            public String toObject(String value) {
787:                return value;
788:            }
789:
790:            /**
791:             * Links to the target.
792:             */
793:            public void link() {
794:            }
795:
796:            /**
797:             * Generates the pre-delete code
798:             */
799:            public void generatePreDelete(JavaWriter out) throws IOException {
800:            }
801:
802:            /**
803:             * Generates the delete foreign
804:             */
805:            public void generatePostDelete(JavaWriter out) throws IOException {
806:            }
807:
808:            /**
809:             * Generates the expire code
810:             */
811:            public void generateExpire(JavaWriter out) throws IOException {
812:            }
813:
814:            /**
815:             * Generates code for foreign entity create/delete
816:             */
817:            public void generateInvalidateForeign(JavaWriter out)
818:                    throws IOException {
819:            }
820:
821:            /**
822:             * Deletes the children
823:             */
824:            public void childDelete(AmberConnection aConn,
825:                    Serializable primaryKey) throws SQLException {
826:            }
827:
828:            /**
829:             * Generates code to convert to the type from the object.
830:             */
831:            public String generateCastFromObject(String value) {
832:                return value;
833:            }
834:
835:            /**
836:             * Generates code to test the equals.
837:             */
838:            public String generateEquals(String leftBase, String value) {
839:                return leftBase + ".equals(" + value + ")";
840:            }
841:
842:            /**
843:             * Creates the expression for the field.
844:             */
845:            public AmberExpr createExpr(QueryParser parser, PathExpr parent) {
846:                throw new UnsupportedOperationException(getClass().getName());
847:            }
848:
849:            public String toString() {
850:                return getClass().getSimpleName() + "[" + getName() + ","
851:                        + getSourceType() + "]";
852:            }
853:        }
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