Source Code Cross Referenced for GenericOID.java in  » Testing » PolePosition-0.20 » com » versant » core » common » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » PolePosition 0.20 » com.versant.core.common 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998 - 2005 Versant Corporation
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         * Versant Corporation - initial API and implementation
010:         */
011:        package com.versant.core.common;
012:
013:        import com.versant.core.metadata.ClassMetaData;
014:        import com.versant.core.metadata.FieldMetaData;
015:        import com.versant.core.metadata.MDStatics;
016:        import com.versant.core.metadata.ModelMetaData;
017:        import com.versant.core.util.FastParser;
018:        import com.versant.core.util.OIDObjectInput;
019:        import com.versant.core.util.OIDObjectOutput;
020:
021:        import java.io.*;
022:        import java.math.BigDecimal;
023:        import java.math.BigInteger;
024:        import java.util.Date;
025:        import java.util.Locale;
026:
027:        /**
028:         * This is an OID implementation suitable for use with any PC class. It is
029:         * intended for use during development when the OID class generating code is
030:         * broken. The meta data OID factory method can just return these for all
031:         * PC classes. Performance is not important for this class as it will not
032:         * be used in a production release.
033:         */
034:        public abstract class GenericOID implements  OID, Externalizable
035:
036:        {
037:
038:            protected ClassMetaData cmd;
039:            protected boolean resolved;
040:            protected Object[] pk;
041:
042:            public GenericOID() {
043:            }
044:
045:            public GenericOID(ClassMetaData cmd, boolean resolved) {
046:                if (cmd == null) {
047:                    throw BindingSupportImpl.getInstance().internal(
048:                            "The supplied cmd is null");
049:                }
050:                this .cmd = cmd;
051:                this .resolved = resolved;
052:                pk = new Object[cmd.pkFields == null ? 1 : cmd.pkFields.length];
053:            }
054:
055:            /**
056:             * This is for the GenericState implementation.
057:             */
058:            public Object[] getPk() {
059:                return pk;
060:            }
061:
062:            /**
063:             * Do we know the actual class of the object we are referencing? An
064:             * OID may be created from a reference to a base class. The actual
065:             * class of the object referenced might only be detirmined when its
066:             * State is fetched from the store.
067:             *
068:             * @see #resolve
069:             */
070:            public boolean isResolved() {
071:                return resolved;
072:            }
073:
074:            /**
075:             * Resolve this OID from the state. This will update our class index
076:             * to reflect the state. It is a NOP to call this on an already
077:             * resolved OID.
078:             *
079:             * @see #isResolved
080:             */
081:            public void resolve(State state) {
082:                if (!resolved) {
083:                    cmd = state.getClassMetaData();
084:                    resolved = true;
085:                }
086:            }
087:
088:            public int getClassIndex() {
089:                return cmd.index;
090:            }
091:
092:            public ClassMetaData getClassMetaData() {
093:                if (!resolved) {
094:                    throw BindingSupportImpl.getInstance().internal(
095:                            "Called 'getClassMetaData()' on unresolved oid");
096:                }
097:                return cmd;
098:            }
099:
100:            public ClassMetaData getAvailableClassMetaData() {
101:                return cmd;
102:            }
103:
104:            public ClassMetaData getBaseClassMetaData() {
105:                return cmd.top;
106:            }
107:
108:            public int getIdentityType() {
109:                return cmd.top.identityType;
110:            }
111:
112:            public void copyKeyFields(Object[] data) {
113:                for (int i = 0; i < pk.length; i++)
114:                    pk[i] = data[i];
115:            }
116:
117:            /**
118:             * Return a copy of the oid.
119:             */
120:            public OID copy() {
121:                GenericOID copy = newInstance();
122:                copy.resolved = resolved;
123:                copy.cmd = cmd;
124:                copy.pk = pk;
125:                return copy;
126:            }
127:
128:            protected abstract GenericOID newInstance();
129:
130:            public void fillFromPK(Object pk) {
131:                FieldMetaData[] pkFields = cmd.pkFields;
132:                Object[] pkValues = new Object[pkFields.length];
133:                for (int i = 0; i < pkFields.length; i++) {
134:                    try {
135:                        pkValues[i] = pk.getClass().getField(
136:                                pkFields[i].getPkFieldName()).get(pk);
137:                    } catch (Exception e) {
138:                        throw BindingSupportImpl.getInstance().internal(
139:                                e.getMessage(), e);
140:                    }
141:                }
142:                copyKeyFields(pkValues);
143:            }
144:
145:            public OID fillFromIDObject(Object id) {
146:                pk = new Object[cmd.pkFields.length];
147:                if (cmd.objectIdClass == null) {
148:                    if (cmd.pkFields.length != 1) {
149:                        throw BindingSupportImpl
150:                                .getInstance()
151:                                .invalidOperation(
152:                                        "Classes with application can only have a single pk "
153:                                                + "field if a ApplicationId class is not specified");
154:                    }
155:                    pk[0] = id;
156:                } else {
157:                    FieldMetaData[] pkFields = cmd.pkFields;
158:                    Object[] pkValues = pk;
159:                    for (int i = 0; i < pkFields.length; i++) {
160:                        try {
161:                            pkValues[i] = pk.getClass().getField(
162:                                    pkFields[i].getPkFieldName()).get(pk);
163:                        } catch (Exception e) {
164:                            throw BindingSupportImpl.getInstance().internal(
165:                                    e.getMessage(), e);
166:                        }
167:                    }
168:                }
169:                return this ;
170:            }
171:
172:            /**
173:             * Fill this OID from its toString. The classid will have already been
174:             * parsed out with index indicating the first character after the
175:             * separator.
176:             */
177:            public void fillFromIDString(String s, int i) {
178:                try {
179:                    // There will always be only one column for datastore identity.
180:                    // Composite pk is only supported for application identity which
181:                    // will use the code in the objectid-class.
182:                    switch (cmd.datastoreIdentityTypeCode) {
183:                    case MDStatics.INTW:
184:                    case MDStatics.INT:
185:                        pk[0] = new Integer(FastParser.parseInt(s, i));
186:                        break;
187:                    case MDStatics.SHORTW:
188:                    case MDStatics.SHORT:
189:                        pk[0] = new Short((short) FastParser.parseInt(s, i));
190:                        break;
191:                    case MDStatics.STRING:
192:                        pk[0] = s.substring(i);
193:                        break;
194:                    case MDStatics.BOOLEANW:
195:                    case MDStatics.BOOLEAN:
196:                        pk[0] = new Boolean(s.substring(i));
197:                        break;
198:                    case MDStatics.BYTEW:
199:                    case MDStatics.BYTE:
200:                        pk[0] = new Byte((byte) FastParser.parseInt(s, i));
201:                        break;
202:                    case MDStatics.BIGDECIMAL:
203:                        pk[0] = new BigDecimal(s.substring(i));
204:                        break;
205:                    case MDStatics.BIGINTEGER:
206:                        pk[0] = new BigInteger(s.substring(i));
207:                        break;
208:                    case MDStatics.DOUBLEW:
209:                    case MDStatics.DOUBLE:
210:                        pk[0] = new Double(s.substring(i));
211:                        break;
212:                    case MDStatics.FLOATW:
213:                    case MDStatics.FLOAT:
214:                        pk[0] = new Float(s.substring(i));
215:                        break;
216:                    case MDStatics.LONGW:
217:                    case MDStatics.LONG:
218:                        pk[0] = new Long(FastParser.parseLong(s, i));
219:                        break;
220:                    default:
221:                        throw BindingSupportImpl.getInstance().internal(
222:                                "Unable to create id from the string '" + s
223:                                        + "' type code "
224:                                        + cmd.datastoreIdentityTypeCode);
225:                    }
226:                } catch (Exception e) {
227:                    throw BindingSupportImpl.getInstance().invalidOperation(
228:                            "invalid OID String: '" + s + "'", e);
229:                }
230:            }
231:
232:            public int hashCode() {
233:                if (pk == null)
234:                    return super .hashCode();
235:                int hc = pk[0].hashCode() + cmd.top.index;
236:                for (int i = 1; i < pk.length; i++)
237:                    hc = hc * 17 + pk[i].hashCode();
238:                return hc;
239:            }
240:
241:            public boolean equals(Object obj) {
242:                if (obj == null)
243:                    return false;
244:                if (obj instanceof  GenericOID) {
245:                    GenericOID o = (GenericOID) obj;
246:                    if (o.cmd.top != cmd.top)
247:                        return false;
248:                    for (int i = pk.length - 1; i >= 0; i--) {
249:                        if (pk[i] == null) {
250:                            if (o.pk[i] != null)
251:                                return false;
252:                        } else if (!pk[i].equals(o.pk[i])) {
253:                            return false;
254:                        }
255:                    }
256:                    return true;
257:                } else {
258:                    return obj.equals(this );
259:                }
260:            }
261:
262:            public String toString() {
263:                if (!resolved) {
264:                    throw BindingSupportImpl.getInstance().internal(
265:                            "This oid is not resolved to its actual type");
266:                }
267:                return toStringImp();
268:            }
269:
270:            /**
271:             * Get the toString of this OID even if it has not been resolved.
272:             */
273:            public String toStringImp() {
274:                if (pk == null)
275:                    return "null pk";
276:                StringBuffer s = new StringBuffer();
277:                s.append(cmd.classId);
278:                s.append(MDStatics.OID_STRING_SEPERATOR);
279:                int len = pk.length;
280:                s.append(pk[0]);
281:                for (int i = 1; i < len; i++) {
282:                    s.append(MDStatics.OID_STRING_SEPERATOR);
283:                    s.append(pk[i]);
284:                }
285:                return s.toString();
286:            }
287:
288:            public abstract String toSString();
289:
290:            /**
291:             * Encode the 'primary key' of this OID as a String. This is used for
292:             * pretty printing OIDs in the workbench.
293:             */
294:            public String toPkString() {
295:                if (pk == null)
296:                    return "null pk";
297:                StringBuffer s = new StringBuffer();
298:                int len = pk.length;
299:                s.append(pk[0]);
300:                for (int i = 1; i < len; i++) {
301:                    s.append(',');
302:                    s.append(' ');
303:                    s.append(pk[i]);
304:                }
305:                return s.toString();
306:            }
307:
308:            public int compareTo(Object o) {
309:                OID oo = (OID) o;
310:                int diff = cmd.top.index - oo.getBaseClassMetaData().index;
311:                if (diff != 0)
312:                    return diff;
313:                if (oo.isNew()) {
314:                    return +1; // we are always after new OIDs
315:                } else {
316:                    GenericOID oid = (GenericOID) oo;
317:                    for (int i = 0; i < pk.length; i++) {
318:                        Object a = pk[i];
319:                        Object b = oid.pk[i];
320:                        if (a instanceof  Comparable) {
321:                            diff = ((Comparable) a).compareTo(b);
322:                        } else {
323:                            // yuck but I do not know any other way to do this
324:                            diff = a.toString().compareTo(b.toString());
325:                        }
326:                        if (diff != 0)
327:                            return diff;
328:                    }
329:                    return 0;
330:                }
331:            }
332:
333:            /**
334:             * Return the primary key stored in this OID as an long. This will only
335:             * be called for datastore identity classes.
336:             */
337:            public long getLongPrimaryKey() {
338:                return ((Number) pk[0]).longValue();
339:            }
340:
341:            /**
342:             * Set the primary key stored in this OID as an long. This will only be
343:             * called for datastore identity classes.
344:             */
345:            public void setLongPrimaryKey(long pki) {
346:                switch (cmd.datastoreIdentityTypeCode) {
347:                case MDStatics.INTW:
348:                case MDStatics.INT:
349:                    pk[0] = new Integer((int) pki);
350:                    break;
351:                case MDStatics.SHORTW:
352:                case MDStatics.SHORT:
353:                    pk[0] = new Short((short) pki);
354:                    break;
355:                case MDStatics.BYTEW:
356:                case MDStatics.BYTE:
357:                    pk[0] = new Byte((byte) pki);
358:                    break;
359:                case MDStatics.LONGW:
360:                case MDStatics.LONG:
361:                    pk[0] = new Long(pki);
362:                    break;
363:                default:
364:                    throw BindingSupportImpl.getInstance().internal(
365:                            "Unhandled java type code "
366:                                    + cmd.datastoreIdentityTypeCode);
367:                }
368:            }
369:
370:            public void populateObjectIdClassInstance(Object o) {
371:                ClassMetaData cmd = getAvailableClassMetaData();
372:                if (cmd.identityType != MDStatics.IDENTITY_TYPE_APPLICATION) {
373:                    throw BindingSupportImpl.getInstance().internal(
374:                            "not an app identity class: " + cmd.qname);
375:                }
376:                FieldMetaData[] a = cmd.pkFields;
377:                for (int i = 0; i < a.length; i++) {
378:                    try {
379:                        a[i].getObjectidClassField().set(o, pk[i]);
380:                    } catch (Exception e) {
381:                        throw BindingSupportImpl.getInstance().internal(
382:                                e.toString(), e);
383:                    }
384:                }
385:            }
386:
387:            public boolean isNew() {
388:                return false;
389:            }
390:
391:            public OID getMappedOID() {
392:                return this ;
393:            }
394:
395:            public OID getRealOID() {
396:                return this ;
397:            }
398:
399:            public OID getAvailableOID() {
400:                return this ;
401:            }
402:
403:            public int getAvailableClassId() {
404:                return getAvailableClassMetaData().classId;
405:            }
406:
407:            public void setCmd(ClassMetaData cmd) {
408:                this .cmd = cmd;
409:            }
410:
411:            public void writeExternal(OIDObjectOutput os) throws IOException {
412:                writeExternalImp(os);
413:            }
414:
415:            public void writeExternal(ObjectOutput os) throws IOException {
416:                os.writeShort(getClassIndex());
417:                os.writeBoolean(resolved);
418:                writeExternalImp(os);
419:            }
420:
421:            private void writeExternalImp(ObjectOutput os) throws IOException {
422:                if (cmd.pkFields == null) {
423:                    writeObjectByTypeCode(pk[0], cmd.datastoreIdentityTypeCode,
424:                            os);
425:                } else {
426:                    int n = cmd.pkFields.length;
427:                    for (int i = 0; i < n; i++) {
428:                        writeObjectByTypeCode(pk[i], cmd.pkFields[i].typeCode,
429:                                os);
430:                    }
431:                }
432:            }
433:
434:            public void readExternal(OIDObjectInput is)
435:                    throws ClassNotFoundException, IOException {
436:                readExternalImp(is);
437:            }
438:
439:            public void readExternal(ObjectInput is)
440:                    throws ClassNotFoundException, IOException {
441:                cmd = ModelMetaData.getThreadMetaData().classes[is.readShort()];
442:                resolved = is.readBoolean();
443:                readExternalImp(is);
444:            }
445:
446:            private void readExternalImp(ObjectInput is) throws IOException {
447:                // cmd and resolved will have already been set by the constructor so
448:                // no need to read them here
449:                if (cmd.pkFields == null) {
450:                    pk = new Object[] { readObjectByTypeCode(
451:                            cmd.datastoreIdentityTypeCode, is) };
452:                } else {
453:                    int n = cmd.pkFields.length;
454:                    pk = new Object[n];
455:                    for (int i = 0; i < n; i++) {
456:                        pk[i] = readObjectByTypeCode(cmd.pkFields[i].typeCode,
457:                                is);
458:                    }
459:                }
460:            }
461:
462:            private void writeObjectByTypeCode(Object value, int typeCode,
463:                    ObjectOutput os) throws IOException {
464:                if (value != null) {
465:                    //write a non-null indicator
466:                    os.writeBoolean(false);
467:                    switch (typeCode) {
468:                    case MDStatics.INTW:
469:                    case MDStatics.INT:
470:                        os.writeInt(((Integer) value).intValue());
471:                        break;
472:                    case MDStatics.CHARW:
473:                    case MDStatics.CHAR:
474:                        os.writeInt(((Character) value).charValue());
475:                        break;
476:                    case MDStatics.SHORTW:
477:                    case MDStatics.SHORT:
478:                        os.writeShort(((Short) value).intValue());
479:                        break;
480:                    case MDStatics.STRING:
481:                        os.writeUTF((String) value);
482:                        break;
483:                    case MDStatics.BOOLEANW:
484:                    case MDStatics.BOOLEAN:
485:                        os.writeBoolean(((Boolean) value).booleanValue());
486:                        break;
487:                    case MDStatics.BYTEW:
488:                    case MDStatics.BYTE:
489:                        os.writeByte(((Byte) value).byteValue());
490:                        break;
491:                    case MDStatics.DOUBLEW:
492:                    case MDStatics.DOUBLE:
493:                        os.writeDouble(((Double) value).doubleValue());
494:                        break;
495:                    case MDStatics.FLOATW:
496:                    case MDStatics.FLOAT:
497:                        os.writeFloat(((Float) value).floatValue());
498:                        break;
499:                    case MDStatics.LONGW:
500:                    case MDStatics.LONG:
501:                        os.writeLong(((Long) value).longValue());
502:                        break;
503:                    case MDStatics.LOCALE:
504:                        final Locale l = (Locale) value;
505:                        os.writeUTF(l.getLanguage());
506:                        os.writeUTF(l.getCountry());
507:                        os.writeUTF(l.getVariant());
508:                        break;
509:                    case MDStatics.BIGDECIMAL:
510:                        os.writeUTF(value.toString());
511:                        break;
512:                    case MDStatics.BIGINTEGER:
513:                        os.writeUTF(value.toString());
514:                        break;
515:                    case MDStatics.DATE:
516:                        os.writeLong(((Date) value).getTime());
517:                        break;
518:                    default:
519:                        throw BindingSupportImpl.getInstance().internal(
520:                                "Unable to write type code " + typeCode);
521:                    }
522:                } else {
523:                    //write a null indicator
524:                    os.writeBoolean(true);
525:                }
526:            }
527:
528:            private Object readObjectByTypeCode(int typeCode, ObjectInput is)
529:                    throws IOException {
530:                if (is.readBoolean()) {
531:                    return null;
532:                } else {
533:                    switch (typeCode) {
534:                    case MDStatics.INTW:
535:                    case MDStatics.INT:
536:                        return new Integer(is.readInt());
537:                    case MDStatics.CHARW:
538:                    case MDStatics.CHAR:
539:                        return new Character(is.readChar());
540:                    case MDStatics.SHORTW:
541:                    case MDStatics.SHORT:
542:                        return new Short(is.readShort());
543:                    case MDStatics.STRING:
544:                        return is.readUTF();
545:                    case MDStatics.BOOLEANW:
546:                    case MDStatics.BOOLEAN:
547:                        return new Boolean(is.readBoolean());
548:                    case MDStatics.BYTEW:
549:                    case MDStatics.BYTE:
550:                        return new Byte(is.readByte());
551:                    case MDStatics.DOUBLEW:
552:                    case MDStatics.DOUBLE:
553:                        return new Double(is.readDouble());
554:                    case MDStatics.FLOATW:
555:                    case MDStatics.FLOAT:
556:                        return new Float(is.readFloat());
557:                    case MDStatics.LONGW:
558:                    case MDStatics.LONG:
559:                        return new Long(is.readLong());
560:                    case MDStatics.LOCALE:
561:                        return new Locale(is.readUTF(), is.readUTF(), is
562:                                .readUTF());
563:                    case MDStatics.BIGDECIMAL:
564:                        return new BigDecimal(is.readUTF());
565:                    case MDStatics.BIGINTEGER:
566:                        return new BigInteger(is.readUTF());
567:                    case MDStatics.DATE:
568:                        return new Date(is.readLong());
569:                    default:
570:                        throw BindingSupportImpl.getInstance().internal(
571:                                "Unable to read java type code " + typeCode);
572:                    }
573:                }
574:            }
575:
576:        }
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