summaryrefslogtreecommitdiff
path: root/storage/connect/jmgoconn.cpp
blob: c80800bd897a6fb4fcbc867451ff3a995db61ef0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
/************ JMgoConn C++ Functions Source Code File (.CPP) ***********/
/*  Name: JMgoConn.CPP  Version 1.1                                    */
/*                                                                     */
/*  (C) Copyright to the author Olivier BERTRAND          2017         */
/*                                                                     */
/*  This file contains the MongoDB Java connection classes functions.  */
/***********************************************************************/

/***********************************************************************/
/*  Include relevant MariaDB header file.                              */
/***********************************************************************/
#include <my_global.h>

/***********************************************************************/
/*  Required objects includes.                                         */
/***********************************************************************/
#include "global.h"
#include "plgdbsem.h"
#include "colblk.h"
#include "xobject.h"
#include "xtable.h"
#include "filter.h"
#include "jmgoconn.h"

#define nullptr 0

bool IsNum(PSZ s);
bool MakeSelector(PGLOBAL g, PFIL fp, PSTRG s);

/* --------------------------- Class JNCOL --------------------------- */

/***********************************************************************/
/*  Add a column in the column list.                                   */
/***********************************************************************/
void JNCOL::AddCol(PGLOBAL g, PCOL colp, PSZ jp)
{
	char *p;
	PJKC  kp, kcp;

	if ((p = strchr(jp, '.'))) {
		PJNCOL icp;

		*p++ = 0;

		for (kp = Klist; kp; kp = kp->Next)
			if (kp->Jncolp && !strcmp(jp, kp->Key))
				break;

		if (!kp) {
			icp = new(g) JNCOL(IsNum(p));
			kcp = (PJKC)PlugSubAlloc(g, NULL, sizeof(JKCOL));
			kcp->Next = NULL;
			kcp->Jncolp = icp;
			kcp->Colp = NULL;

			if (Array) {
				kcp->Key = NULL;
				kcp->N = atoi(p);
			} else {
				kcp->Key = PlugDup(g, jp);
				kcp->N = 0;
			} // endif Array

			if (Klist) {
				for (kp = Klist; kp->Next; kp = kp->Next);

				kp->Next = kcp;
			} else
				Klist = kcp;

		} else
			icp = kp->Jncolp;

		*(p - 1) = '.';
		icp->AddCol(g, colp, p);
	} else {
		kcp = (PJKC)PlugSubAlloc(g, NULL, sizeof(JKCOL));

		kcp->Next = NULL;
		kcp->Jncolp = NULL;
		kcp->Colp = colp;

		if (Array) {
			kcp->Key = NULL;
			kcp->N = atoi(jp);
		} else {
			kcp->Key = jp;
			kcp->N = 0;
		} // endif Array

		if (Klist) {
			for (kp = Klist; kp->Next; kp = kp->Next);

			kp->Next = kcp;
		} else
			Klist = kcp;

	} // endif jp

}	// end of AddCol

/***********************************************************************/
/*  JMgoConn construction/destruction.                                 */
/***********************************************************************/
JMgoConn::JMgoConn(PGLOBAL g, PCSZ collname, PCSZ wrapper)
	       : JAVAConn(g, wrapper)
{
	CollName = collname;
	readid = fetchid = getdocid = objfldid = fcollid = acollid =
	mkdocid = docaddid = mkarid = araddid = insertid = updateid =
	deleteid = gcollid =	countid =	rewindid = nullptr;
	DiscFunc = "MongoDisconnect";
	Fpc = NULL;
	m_Fetch = 0;
	m_Ncol = 0;
	m_Version = 0;
} // end of JMgoConn

/***********************************************************************/
/*  AddJars: add some jar file to the Class path.                      */
/***********************************************************************/
void JMgoConn::AddJars(PSTRG jpop, char sep)
{
#if defined(DEVELOPMENT)
	if (m_Version == 2) {
		jpop->Append(sep);
//	jpop->Append("C:/Eclipse/workspace/MongoWrap2/bin");
		jpop->Append(sep);
		jpop->Append("C:/mongo-java-driver/mongo-java-driver-2.13.3.jar");
	} else {
		jpop->Append(sep);
//	jpop->Append("C:/Eclipse/workspace/MongoWrap3/bin");
//	jpop->Append("C:/Program Files/MariaDB 10.1/lib/plugin/JavaWrappers.jar");
		jpop->Append(sep);
		jpop->Append("C:/mongo-java-driver/mongo-java-driver-3.4.2.jar");
	} // endif m_Version
#endif   // DEVELOPMENT
} // end of AddJars

/***********************************************************************/
/*  Connect: connect to a data source.                                 */
/***********************************************************************/
bool JMgoConn::Connect(PJPARM sop)
{
	bool		 err = false;
	jint     rc;
	jboolean brc;
	jstring  cln;
	PGLOBAL& g = m_G;

	m_Version = sop->Version;

	/*******************************************************************/
	/*  Create or attach a JVM. 																			 */
	/*******************************************************************/
	if (Open(g))
		return true;

	/*******************************************************************/
	/*  Connect to MongoDB.      																			 */
	/*******************************************************************/
	jmethodID cid = nullptr;

	if (gmID(g, cid, "MongoConnect", "([Ljava/lang/String;)I"))
		return true;

	// Build the java string array
	jobjectArray parms = env->NewObjectArray(4,    // constructs java array of 4
		env->FindClass("java/lang/String"), NULL);   // Strings

	//m_Scrollable = sop->Scrollable;
	//m_RowsetSize = sop->Fsize;

	// change some elements
	if (sop->Driver)
		env->SetObjectArrayElement(parms, 0, env->NewStringUTF(sop->Url));

	if (sop->Url)
		env->SetObjectArrayElement(parms, 1, env->NewStringUTF(sop->Driver));

	if (sop->User)
		env->SetObjectArrayElement(parms, 2, env->NewStringUTF(sop->User));

	if (sop->Pwd)
		env->SetObjectArrayElement(parms, 3, env->NewStringUTF(sop->Pwd));

	// call method
	rc = env->CallIntMethod(job, cid, parms);
	err = Check(rc);
	env->DeleteLocalRef(parms);				 	// Not used anymore

	if (err) {
		sprintf(g->Message, "Connecting: %s rc=%d", Msg, (int)rc);
		return true;
	}	// endif Msg

	/*********************************************************************/
	/*  Get the collection.                                              */
	/*********************************************************************/
	if (gmID(g, gcollid, "GetCollection", "(Ljava/lang/String;)Z"))
		return true;

	cln = env->NewStringUTF(CollName);
	brc = env->CallBooleanMethod(job, gcollid, cln);
	env->DeleteLocalRef(cln);

	if (Check(brc ? -1 : 0)) {
		sprintf(g->Message, "GetCollection: %s", Msg);
		return true;
	}	// endif Msg

	m_Connected = true;
	return false;
} // end of Connect

/***********************************************************************/
/*  CollSize: returns the number of documents in the collection.       */
/***********************************************************************/
int JMgoConn::CollSize(PGLOBAL g)
{
	if (!gmID(g, countid, "GetCollSize", "()J")) {
		jlong card = env->CallLongMethod(job, countid);

		return (int)card;
	} else
		return 2;				 // Make MariaDB happy

} // end of CollSize

/***********************************************************************/
/*  OpenDB: Data Base open routine for MONGO access method.            */
/***********************************************************************/
bool JMgoConn::MakeCursor(PGLOBAL g, PTDB tdbp, PCSZ options,
	                                               PCSZ filter, bool pipe)
{
	const char *p;
	bool  b = false, id = (tdbp->GetMode() != MODE_READ), all = false;
	uint  len;
	PCOL  cp;
	PSZ   jp;
	PCSZ  op = NULL, sf = NULL, Options = options;
	PSTRG s = NULL;
	PFIL  filp = tdbp->GetFilter();

	if (Options && !stricmp(Options, "all")) {
		Options = NULL;
		all = true;
	} // endif Options

	for (cp = tdbp->GetColumns(); cp; cp = cp->GetNext())
		if (!strcmp(cp->GetName(), "_id"))
			id = true;
		else if (cp->GetFmt() && !strcmp(cp->GetFmt(), "*") && (!Options || pipe))
			all = true;

	if (pipe && Options) {
		if (trace(1))
			htrc("Pipeline: %s\n", Options);

		p = strrchr(Options, ']');

		if (!p) {
			strcpy(g->Message, "Missing ] in pipeline");
			return true;
		} else
			*(char*)p = 0;

		s = new(g) STRING(g, 1023, (PSZ)Options);

		if (filp) {
			s->Append(",{\"$match\":");

			if (MakeSelector(g, filp, s)) {
				strcpy(g->Message, "Failed making selector");
				return true;
			} else
				s->Append('}');

			tdbp->SetFilter(NULL);     // Not needed anymore
		} // endif To_Filter

		if (!all && tdbp->GetColumns()) {
			// Project list
			len = s->GetLength();
			s->Append(",{\"$project\":{\"");

			if (!id)
				s->Append("_id\":0,\"");

			for (PCOL cp = tdbp->GetColumns(); cp; cp = cp->GetNext()) {
				if (b)
					s->Append(",\"");
				else
					b = true;

				if ((jp = cp->GetJpath(g, true)))
					s->Append(jp);
				else {
					s->Truncate(len);
					goto nop;
				}	// endif Jpath

				s->Append("\":1");
			} // endfor cp

			s->Append("}}");
		} // endif all

	nop:
		s->Append("]}");
		s->Resize(s->GetLength() + 1);
		*(char*)p = ']';		 // Restore Colist for discovery
		p = s->GetStr();

		if (trace(33))
			htrc("New Pipeline: %s\n", p);

		return AggregateCollection(p);
	} else {
		if (filter || filp) {
			if (trace(1)) {
				if (filter)
					htrc("Filter: %s\n", filter);

				if (filp) {
					char buf[512];

					filp->Prints(g, buf, 511);
					htrc("To_Filter: %s\n", buf);
				} // endif To_Filter

			}	// endif trace

			s = new(g) STRING(g, 1023, (PSZ)filter);
			len = s->GetLength();

			if (filp) {
				if (filter)
					s->Append(',');

				if (MakeSelector(g, filp, s)) {
					strcpy(g->Message, "Failed making selector");
					return true;
				}	// endif Selector

				tdbp->SetFilter(NULL);     // Not needed anymore
			} // endif To_Filter

			if (trace(33))
				htrc("selector: %s\n", s->GetStr());

			s->Resize(s->GetLength() + 1);
			sf = PlugDup(g, s->GetStr());
		} // endif Filter

		if (!all) {
			if (Options && *Options) {
				if (trace(1))
					htrc("options=%s\n", Options);

				op = Options;
			} else if (tdbp->GetColumns()) {
				// Projection list
				if (s)
					s->Set("{\"");
				else
					s = new(g) STRING(g, 511, "{\"");

				if (!id)
					s->Append("_id\":0,\"");

				for (PCOL cp = tdbp->GetColumns(); cp; cp = cp->GetNext()) {
					if (b)
						s->Append(",\"");
					else
						b = true;

					if ((jp = cp->GetJpath(g, true)))
						s->Append(jp);
					else {
						// Can this happen?
						htrc("Fail getting projection path of %s\n", cp->GetName());
						goto nope;
					}	// endif Jpath

					s->Append("\":1");
				} // endfor cp

				s->Append("}");
				s->Resize(s->GetLength() + 1);
				op = s->GetStr();
			} else {
				// count(*)	?
				op = "{\"_id\":1}";
			} // endif Options

		} // endif all

	nope:
		return FindCollection(sf, op);
	} // endif Pipe

} // end of MakeCursor

/***********************************************************************/
/*  Find a collection and make cursor.                                 */
/***********************************************************************/
bool JMgoConn::FindCollection(PCSZ query, PCSZ proj)
{
	bool		 rc = true;
	jboolean brc;
	jstring  qry = nullptr, prj = nullptr;
	PGLOBAL& g = m_G;

	// Get the methods used to execute a query and get the result
	if (!gmID(g, fcollid, "FindColl",	"(Ljava/lang/String;Ljava/lang/String;)Z")) {
		if (query)
			qry = env->NewStringUTF(query);

		if (proj)
			prj = env->NewStringUTF(proj);

		brc = env->CallBooleanMethod(job, fcollid, qry, prj);

		if (!Check(brc ? -1 : 0)) {
			rc = false;
		} else
			sprintf(g->Message, "FindColl: %s", Msg);

		if (query)
			env->DeleteLocalRef(qry);

		if (proj)
			env->DeleteLocalRef(prj);

	} // endif xqid

	return rc;
} // end of FindCollection

/***********************************************************************/
/*  Find a collection and make cursor.                                 */
/***********************************************************************/
bool JMgoConn::AggregateCollection(PCSZ pipeline)
{
	bool		 rc = true;
	jboolean brc;
	jstring  pip = nullptr;
	PGLOBAL& g = m_G;

	// Get the methods used to execute a query and get the result
	if (!gmID(g, acollid, "AggregateColl", "(Ljava/lang/String;)Z")) {
		pip = env->NewStringUTF(pipeline);

		brc = env->CallBooleanMethod(job, acollid, pip);

		if (!Check(brc ? -1 : 0)) {
			rc = false;
		} else
			sprintf(g->Message, "AggregateColl: %s", Msg);

		env->DeleteLocalRef(pip);
	} // endif acollid

	return rc;
} // end of AggregateCollection

/***********************************************************************/
/*  Fetch next row.                                                    */
/***********************************************************************/
int JMgoConn::Fetch(int pos)
{
	jint     rc = JNI_ERR;
	PGLOBAL& g = m_G;

	//if (m_Full)						// Result set has one row
	//	return 1;

	//if (pos) {
	//	if (!m_Scrollable) {
	//		strcpy(g->Message, "Cannot fetch(pos) if FORWARD ONLY");
	//		return rc;
	//	} else if (gmID(m_G, fetchid, "Fetch", "(I)Z"))
	//		return rc;

	//	if (env->CallBooleanMethod(job, fetchid, pos))
	//		rc = m_Rows;

	//} else {
		if (gmID(g, readid, "ReadNext", "()I"))
			return (int)rc;

		rc = env->CallIntMethod(job, readid);

		if (!Check(rc)) {
			//if (rc == 0)
			//	m_Full = (m_Fetch == 1);
			//else
			//	m_Fetch++;

			m_Ncol = (int)rc;
			rc = MY_MIN(rc, 1);
			m_Rows += rc;
		} else
			sprintf(g->Message, "Fetch: %s", Msg);

	//} // endif pos

	return rc;
} // end of Fetch

/***********************************************************************/
/*  Get the Json string of the current document.                       */
/***********************************************************************/
PSZ JMgoConn::GetDocument(void)
{
	PGLOBAL& g = m_G;
	PSZ      doc = NULL;
	jstring  jdc;

	if (!gmID(g, getdocid, "GetDoc", "()Ljava/lang/String;")) {
		jdc = (jstring)env->CallObjectMethod(job, getdocid);

		if (jdc)
			doc = (PSZ)GetUTFString(jdc);

	} // endif getdocid

	return doc;
	} // end of GetDocument

/***********************************************************************/
/*  Group columns for inserting or updating.                           */
/***********************************************************************/
void JMgoConn::MakeColumnGroups(PGLOBAL g, PTDB tdbp)
{
	Fpc = new(g) JNCOL(false);

	for (PCOL colp = tdbp->GetColumns(); colp; colp = colp->GetNext())
		if (!colp->IsSpecial())
			Fpc->AddCol(g, colp, colp->GetJpath(g, false));

} // end of MakeColumnGroups

/***********************************************************************/
/*  Get additional method ID.                                          */
/***********************************************************************/
bool JMgoConn::GetMethodId(PGLOBAL g, MODE mode)
{
	if (mode == MODE_UPDATE) {
		if (gmID(g, mkdocid, "MakeDocument", "()Ljava/lang/Object;"))
			return true;

		if (gmID(g, docaddid, "DocAdd",
			"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z"))
			return true;

		if (gmID(g, updateid, "CollUpdate", "(Ljava/lang/Object;)J"))
			return true;

	} else if (mode == MODE_INSERT) {
		if (gmID(g, mkdocid, "MakeDocument", "()Ljava/lang/Object;"))
			return true;

		if (gmID(g, docaddid, "DocAdd",
			"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z"))
			return true;

		if (gmID(g, mkarid, "MakeArray", "()Ljava/lang/Object;"))
			return true;

		if (gmID(g, araddid, "ArrayAdd", "(Ljava/lang/Object;ILjava/lang/Object;)Z"))
			return true;

		if (gmID(g, insertid, "CollInsert", "(Ljava/lang/Object;)Z"))
			return true;

	} else if (mode == MODE_DELETE)
		if (gmID(g, deleteid, "CollDelete", "(Z)J"))
			return true;

	return gmID(g, rewindid, "Rewind", "()Z");
} // end of GetMethodId

/***********************************************************************/
/*  MakeObject.                                                        */
/***********************************************************************/
jobject JMgoConn::MakeObject(PGLOBAL g, PCOL colp, bool&error )
{
	jclass    cls;
	jmethodID cns = nullptr;								// Constructor
	jobject   val = nullptr;
	PVAL      valp = colp->GetValue();

	error = false;

	if (valp->IsNull())
		return NULL;

	try {
		switch (valp->GetType()) {
			case TYPE_STRING:
				val = env->NewStringUTF(valp->GetCharValue());
				break;
			case TYPE_INT:
			case TYPE_SHORT:
				cls = env->FindClass("java/lang/Integer");
				cns = env->GetMethodID(cls, "<init>", "(I)V");
				val = env->NewObject(cls, cns, valp->GetIntValue());
				break;
			case TYPE_TINY:
				cls = env->FindClass("java/lang/Boolean");
				cns = env->GetMethodID(cls, "<init>", "(Z)V");
				val = env->NewObject(cls, cns, (valp->GetIntValue() != 0));
				break;
			case TYPE_BIGINT:
				cls = env->FindClass("java/lang/Long");
				cns = env->GetMethodID(cls, "<init>", "(J)V");
				val = env->NewObject(cls, cns, valp->GetBigintValue());
				break;
			case TYPE_DOUBLE:
				cls = env->FindClass("java/lang/Double");
				cns = env->GetMethodID(cls, "<init>", "(D)V");
				val = env->NewObject(cls, cns, valp->GetFloatValue());
				break;
			default:
				sprintf(g->Message, "Cannot make object from %d type", valp->GetType());
				error = true;
				break;
		}	// endswitch Type

	} catch (...) {
		sprintf(g->Message, "Cannot make object from %s value", colp->GetName());
		error = true;
	}	// end try/catch

	return val;
}	// end of MakeObject

/***********************************************************************/
/*  MakeDoc.                                                           */
/***********************************************************************/
jobject JMgoConn::MakeDoc(PGLOBAL g, PJNCOL jcp)
{
	bool    error = false;
	jobject parent, child, val;
	jstring jkey;
	
	if (jcp->Array)
		parent = env->CallObjectMethod(job, mkarid);
	else
		parent = env->CallObjectMethod(job, mkdocid);

	for (PJKC kp = jcp->Klist; kp; kp = kp->Next)
		if (kp->Jncolp) {
			if (!(child = MakeDoc(g, kp->Jncolp)))
				return NULL;

			if (!jcp->Array) {
				jkey = env->NewStringUTF(kp->Key);

				if (env->CallBooleanMethod(job, docaddid, parent, jkey, child))
					return NULL;

				env->DeleteLocalRef(jkey);
			} else
				if (env->CallBooleanMethod(job, araddid, parent, kp->N, child))
					return NULL;

		} else {
			if (!(val = MakeObject(g, kp->Colp, error))) {
				if (error)
					return NULL;

			} else if (!jcp->Array) {
				jkey = env->NewStringUTF(kp->Key);

				if (env->CallBooleanMethod(job, docaddid, parent, jkey, val))
					return NULL;

				env->DeleteLocalRef(jkey);
			} else if (env->CallBooleanMethod(job, araddid, parent, kp->N, val)) {
				if (Check(-1))
					sprintf(g->Message, "ArrayAdd: %s", Msg);
				else
					sprintf(g->Message, "ArrayAdd: unknown error");

				return NULL;
			}	// endif ArrayAdd

		} // endif Jncolp

	return parent;
} // end of MakeDoc

/***********************************************************************/
/*  Insert a new document in the collation.                            */
/***********************************************************************/
int JMgoConn::DocWrite(PGLOBAL g)
{
	jobject doc;

	if (!Fpc || !(doc = MakeDoc(g, Fpc)))
		return RC_FX;

	if (env->CallBooleanMethod(job, insertid, doc)) {
		if (Check(-1))
			sprintf(g->Message, "CollInsert: %s", Msg);
		else
			sprintf(g->Message, "CollInsert: unknown error");

		return RC_FX;
	} // endif Insert

	return RC_OK;
} // end of DocWrite

/***********************************************************************/
/*  Update the current document from the collection.                   */
/***********************************************************************/
int JMgoConn::DocUpdate(PGLOBAL g, PTDB tdbp)
{
	int     rc = RC_OK;
	bool    error;
	PCOL    colp;
	jstring jkey;
	jobject val, upd, updlist = env->CallObjectMethod(job, mkdocid);

	// Make the list of changes to do
	for (colp = tdbp->GetSetCols(); colp; colp = colp->GetNext()) {
		jkey = env->NewStringUTF(colp->GetJpath(g, false));
		val = MakeObject(g, colp, error);

		if (error)
			return RC_FX;

		if (env->CallBooleanMethod(job, docaddid, updlist, jkey, val))
			return RC_OK;

		env->DeleteLocalRef(jkey);
	}	// endfor colp

	// Make the update parameter
	upd = env->CallObjectMethod(job, mkdocid);
	jkey = env->NewStringUTF("$set");

	if (env->CallBooleanMethod(job, docaddid, upd, jkey, updlist))
		return RC_OK;

	env->DeleteLocalRef(jkey);

	jlong ar = env->CallLongMethod(job, updateid, upd);

	if (trace(1))
		htrc("DocUpdate: ar = %ld\n", ar);

	if (Check((int)ar)) {
		sprintf(g->Message, "CollUpdate: %s", Msg);
		rc = RC_FX;
	} // endif ar

	return rc;
} // end of DocUpdate

/***********************************************************************/
/*  Remove all or only the current document from the collection.       */
/***********************************************************************/
int JMgoConn::DocDelete(PGLOBAL g, bool all)
{
	int   rc = RC_OK;
	jlong ar = env->CallLongMethod(job, deleteid, all);

	if (trace(1))
		htrc("DocDelete: ar = %ld\n", ar);

	if (Check((int)ar)) {
		sprintf(g->Message, "CollDelete: %s", Msg);
		rc = RC_FX;
	} // endif ar

	return rc;
} // end of DocDelete

/***********************************************************************/
/*  Rewind the collection.                                             */
/***********************************************************************/
bool JMgoConn::Rewind(void)
{
	return env->CallBooleanMethod(job, rewindid);
} // end of Rewind

/***********************************************************************/
/*  Retrieve the column string value from the document.                */
/***********************************************************************/
PSZ JMgoConn::GetColumnValue(PSZ path)
{
	PGLOBAL& g = m_G;
	PSZ      fld = NULL;
	jstring  fn, jn = nullptr;

	if (!path || (jn = env->NewStringUTF(path)) == nullptr) {
		sprintf(g->Message, "Fail to allocate jstring %s", SVP(path));
		throw (int)TYPE_AM_MGO;
	}	// endif name

	if (!gmID(g, objfldid, "GetField", "(Ljava/lang/String;)Ljava/lang/String;")) {
		fn = (jstring)env->CallObjectMethod(job, objfldid, jn);

		if (fn)
			fld = (PSZ)GetUTFString(fn);

	}	// endif objfldid

	return fld;
} // end of GetColumnValue