summaryrefslogtreecommitdiffstats
path: root/c++/src/H5Location.cpp
blob: 98878d77d72da3dfc10f01d0b913d6ec46542ddc (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <string>

#include "H5Include.h"
#include "H5Exception.h"
#include "H5IdComponent.h"
#include "H5PropList.h"
#include "H5Location.h"
#include "H5Object.h"
#include "H5DcreatProp.h"
#include "H5DxferProp.h"
#include "H5FaccProp.h"
#include "H5FcreatProp.h"
#include "H5CommonFG.h"
#include "H5DataType.h"
#include "H5DataSpace.h"
#include "H5AbstractDs.h"
#include "H5File.h"
#include "H5DataSet.h"
#include "H5Attribute.h"

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

#ifndef DOXYGEN_SHOULD_SKIP_THIS
// userAttrOpWrpr simply interfaces between the user's function and the
// C library function H5Aiterate2; used to resolve the different prototype
// problem.  May be moved to Iterator later.
extern "C" herr_t userAttrOpWrpr(hid_t loc_id, const char *attr_name,
    const H5A_info_t *ainfo, void *op_data)
{
   H5std_string s_attr_name = H5std_string( attr_name );
#ifdef NO_STATIC_CAST
   UserData4Aiterate* myData = (UserData4Aiterate *) op_data;
#else
   UserData4Aiterate* myData = static_cast <UserData4Aiterate *> (op_data);
#endif
   myData->op( *myData->location, s_attr_name, myData->opData );
   return 0;
}

//--------------------------------------------------------------------------
// Function:    H5Location default constructor (protected)
// Programmer   Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Location::H5Location() : IdComponent(0) {}

//--------------------------------------------------------------------------
// Function:    H5Location overloaded constructor (protected)
// Purpose      Creates an H5Location object using the id of an existing HDF5
//              object.
// Parameters   object_id - IN: Id of an existing HDF5 object
// Programmer   Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Location::H5Location(const hid_t object_id) : IdComponent(object_id) {}

#endif // DOXYGEN_SHOULD_SKIP_THIS

//--------------------------------------------------------------------------
// Function:	H5Location copy constructor
///\brief	Copy constructor: makes a copy of the original H5Location
///		instance.
///\param	original - IN: H5Location instance to copy
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Location::H5Location( const H5Location& original ) : IdComponent( original ) {}

//--------------------------------------------------------------------------
// Function:	H5Location::createAttribute
///\brief	Creates an attribute for a group, dataset, or named datatype.
///\param	name - IN: Name of the attribute
///\param	data_type - IN: Datatype for the attribute
///\param	data_space - IN: Dataspace for the attribute - only simple
///		dataspaces are allowed at this time
///\param	create_plist - IN: Creation property list - default to
///		PropList::DEFAULT
///\return	Attribute instance
///\exception	H5::AttributeIException
///\par Description
///		The attribute name specified in \a name must be unique.
///		Attempting to create an attribute with the same name as an
///		existing attribute will raise an exception, leaving the
///		pre-existing attribute intact. To overwrite an existing
///		attribute with a new attribute of the same name, first
///		delete the existing one with \c H5Location::removeAttr, then
///		recreate it with this function.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
Attribute H5Location::createAttribute( const char* name, const DataType& data_type, const DataSpace& data_space, const PropList& create_plist ) const
{
   hid_t type_id = data_type.getId();
   hid_t space_id = data_space.getId();
   hid_t plist_id = create_plist.getId();
   hid_t attr_id = H5Acreate2(getId(), name, type_id, space_id, plist_id, H5P_DEFAULT );

   // If the attribute id is valid, create and return the Attribute object
   if( attr_id > 0 )
   {
      Attribute attr( attr_id );
      return( attr );
   }
   else
      throw AttributeIException(inMemFunc("createAttribute"), "H5Acreate2 failed");
}

//--------------------------------------------------------------------------
// Function:	H5Location::createAttribute
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it takes
///		a reference to an \c H5std_string for \a name.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
Attribute H5Location::createAttribute( const H5std_string& name, const DataType& data_type, const DataSpace& data_space, const PropList& create_plist ) const
{
   return( createAttribute( name.c_str(), data_type, data_space, create_plist ));
}

//--------------------------------------------------------------------------
// Function:	H5Location::openAttribute
///\brief	Opens an attribute given its name.
///\param	name - IN: Name of the attribute
///\return	Attribute instance
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
Attribute H5Location::openAttribute( const char* name ) const
{
   hid_t attr_id = H5Aopen(getId(), name, H5P_DEFAULT);
   if( attr_id > 0 )
   {
      Attribute attr( attr_id );
      return( attr );
   }
   else
   {
      throw AttributeIException(inMemFunc("openAttribute"), "H5Aopen failed");
   }
}

//--------------------------------------------------------------------------
// Function:	H5Location::openAttribute
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it takes
///		a reference to an \c H5std_string for \a name.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
Attribute H5Location::openAttribute( const H5std_string& name ) const
{
   return( openAttribute( name.c_str()) );
}

//--------------------------------------------------------------------------
// Function:	H5Location::openAttribute
///\brief	Opens an attribute given its index.
///\param	idx - IN: Index of the attribute, a 0-based, non-negative integer
///\return	Attribute instance
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
Attribute H5Location::openAttribute( const unsigned int idx ) const
{
   hid_t attr_id = H5Aopen_by_idx(getId(), ".", H5_INDEX_CRT_ORDER,
			H5_ITER_INC, (hsize_t)idx, H5P_DEFAULT, H5P_DEFAULT);
   if( attr_id > 0 )
   {
      Attribute attr( attr_id );
      return( attr );
   }
   else
   {
      throw AttributeIException(inMemFunc("openAttribute"), "H5Aopen_by_idx failed");
   }
}

//--------------------------------------------------------------------------
// Function:	H5Location::iterateAttrs
///\brief	Iterates a user's function over all the attributes of an H5
///		object, which may be a group, dataset or named datatype.
///\param	user_op - IN: User's function to operate on each attribute
///\param	_idx - IN/OUT: Starting (IN) and ending (OUT) attribute indices
///\param	op_data - IN: User's data to pass to user's operator function
///\return	Returned value of the last operator if it was non-zero, or
///		zero if all attributes were processed
///\exception	H5::AttributeIException
///\par Description
///		The signature of user_op is
///		void (*)(H5::H5Location&, H5std_string, void*).
///		For information, please refer to the C layer Reference Manual
///		at:
/// http://www.hdfgroup.org/HDF5/doc/RM/RM_H5A.html#Annot-Iterate
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
int H5Location::iterateAttrs( attr_operator_t user_op, unsigned *_idx, void *op_data )
{
   // store the user's function and data
   UserData4Aiterate* userData = new UserData4Aiterate;
   userData->opData = op_data;
   userData->op = user_op;
   userData->location = this;

   // call the C library routine H5Aiterate2 to iterate the attributes
   hsize_t idx = _idx ? (hsize_t)*_idx : 0;
   int ret_value = H5Aiterate2(getId(), H5_INDEX_NAME, H5_ITER_INC, &idx,
			userAttrOpWrpr, (void *) userData);

   // release memory
   delete userData;

   if( ret_value >= 0 ) {
      /* Pass back update index value to calling code */
      if (_idx)
	 *_idx = (unsigned)idx;

      return( ret_value );
   }
   else  // raise exception when H5Aiterate returns a negative value
      throw AttributeIException(inMemFunc("iterateAttrs"), "H5Aiterate2 failed");
}

//--------------------------------------------------------------------------
// Function:	H5Location::getNumAttrs
///\brief	Returns the number of attributes attached to this HDF5 object.
///\return	Number of attributes
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
int H5Location::getNumAttrs() const
{
   H5O_info_t oinfo;    /* Object info */

   if(H5Oget_info(getId(), &oinfo) < 0)
      throw AttributeIException(inMemFunc("getNumAttrs"), "H5Oget_info failed");
   else
      return( (int)oinfo.num_attrs );
}

//--------------------------------------------------------------------------
// Function:	H5Location::attrExists
///\brief	Checks whether the named attribute exists at this location.
///\param	name - IN: Name of the attribute to be queried
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2013
//--------------------------------------------------------------------------
bool H5Location::attrExists(const char* name) const
{
   // Call C routine H5Aexists to determine whether an attribute exists
   // at this location, which could be specified by a file, group, dataset,
   // or named datatype.
   herr_t ret_value = H5Aexists(getId(), name);
   if( ret_value > 0 )
      return true;
   else if(ret_value == 0)
      return false;
   else // Raise exception when H5Aexists returns a negative value
      throw AttributeIException(inMemFunc("attrExists"), "H5Aexists failed");
}

//--------------------------------------------------------------------------
// Function:	H5Location::attrExists
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it takes
///		a reference to an \c H5std_string for \a name.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
bool H5Location::attrExists(const H5std_string& name) const
{
   return(attrExists(name.c_str()));
}

//--------------------------------------------------------------------------
// Function:	H5Location::removeAttr
///\brief	Removes the named attribute from this object.
///\param	name - IN: Name of the attribute to be removed
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void H5Location::removeAttr( const char* name ) const
{
   herr_t ret_value = H5Adelete(getId(), name);
   if( ret_value < 0 )
      throw AttributeIException(inMemFunc("removeAttr"), "H5Adelete failed");
}

//--------------------------------------------------------------------------
// Function:	H5Location::removeAttr
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it takes
///		a reference to an \c H5std_string for \a name.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void H5Location::removeAttr( const H5std_string& name ) const
{
   removeAttr( name.c_str() );
}

//--------------------------------------------------------------------------
// Function:	H5Location::renameAttr
///\brief	Renames the named attribute from this object.
///\param	oldname - IN: Name of the attribute to be renamed
///\param	newname - IN: New name ame of the attribute
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - Mar, 2005
//--------------------------------------------------------------------------
void H5Location::renameAttr(const char* oldname, const char* newname) const
{
   herr_t ret_value = H5Arename(getId(), oldname, newname);
   if (ret_value < 0)
      throw AttributeIException(inMemFunc("renameAttr"), "H5Arename failed");
}

//--------------------------------------------------------------------------
// Function:	H5Location::renameAttr
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it takes
///		a reference to an \c H5std_string for the names.
// Programmer	Binh-Minh Ribler - Mar, 2005
//--------------------------------------------------------------------------
void H5Location::renameAttr(const H5std_string& oldname, const H5std_string& newname) const
{
   renameAttr (oldname.c_str(), newname.c_str());
}

//--------------------------------------------------------------------------
// Function:	H5Location::flush
///\brief	Flushes all buffers associated with a location to disk.
///\param	scope - IN: Specifies the scope of the flushing action,
///		which can be either of these values:
///		\li \c H5F_SCOPE_GLOBAL - Flushes the entire virtual file
///		\li \c H5F_SCOPE_LOCAL - Flushes only the specified file
///\exception	H5::FileIException
///\par Description
///		This location is used to identify the file to be flushed.
// Programmer	Binh-Minh Ribler - 2012
// Modification
//	Sep 2012 - BMR
//		Moved from H5File/H5Object
//--------------------------------------------------------------------------
void H5Location::flush(H5F_scope_t scope) const
{
   herr_t ret_value = H5Fflush(getId(), scope);
   if( ret_value < 0 )
   {
      throw FileIException(inMemFunc("flush"), "H5Fflush failed");
   }
}

//--------------------------------------------------------------------------
// Function:	H5Location::getFileName
///\brief	Gets the name of the file, in which this HDF5 object belongs.
///\return	File name
///\exception	H5::IdComponentException
// Programmer	Binh-Minh Ribler - Jul, 2004
//--------------------------------------------------------------------------
H5std_string H5Location::getFileName() const
{
   try {
      return(p_get_file_name());
   }
   catch (IdComponentException E) {
      throw FileIException(inMemFunc("getFileName"), E.getDetailMsg());
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::p_reference (protected)
// Purpose      Creates a reference to an HDF5 object or a dataset region.
// Parameters
//              name - IN: Name of the object to be referenced
//              dataspace - IN: Dataspace with selection
//              ref_type - IN: Type of reference; default to \c H5R_DATASET_REGION
// Exception    H5::IdComponentException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
void H5Location::p_reference(void* ref, const char* name, hid_t space_id, H5R_type_t ref_type) const
{
   herr_t ret_value = H5Rcreate(ref, getId(), name, ref_type, space_id);
   if (ret_value < 0)
   {
      throw ReferenceException("", "H5Rcreate failed");
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::reference
///\brief       Creates a reference to an HDF5 object or a dataset region.
///\param       ref - IN: Reference pointer
///\param       name - IN: Name of the object to be referenced
///\param       dataspace - IN: Dataspace with selection
///\param       ref_type - IN: Type of reference to query, valid values are:
///		\li \c H5R_OBJECT         - Reference is an object reference.
///		\li \c H5R_DATASET_REGION - Reference is a dataset region
///			reference. - this is the default
///\exception   H5::ReferenceException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
void H5Location::reference(void* ref, const char* name, const DataSpace& dataspace, H5R_type_t ref_type) const
{
   try {
      p_reference(ref, name, dataspace.getId(), ref_type);
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::reference", E.getDetailMsg());
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::reference
///\brief       This is an overloaded function, provided for your convenience.
///             It differs from the above function in that it only creates
///             a reference to an HDF5 object, not to a dataset region.
///\param       ref - IN: Reference pointer
///\param       name - IN: Name of the object to be referenced - \c char pointer
///\exception   H5::ReferenceException
///\par Description
//              This function passes H5R_OBJECT and -1 to the protected
//              function for it to pass to the C API H5Rcreate
//              to create a reference to the named object.
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
void H5Location::reference(void* ref, const char* name) const
{
   try {
      p_reference(ref, name, -1, H5R_OBJECT);
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::reference", E.getDetailMsg());
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::reference
///\brief       This is an overloaded function, provided for your convenience.
///             It differs from the above function in that it takes an
///             \c H5std_string for the object's name.
///\param       ref - IN: Reference pointer
///\param       name - IN: Name of the object to be referenced - \c H5std_string
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
void H5Location::reference(void* ref, const H5std_string& name) const
{
   reference(ref, name.c_str());
}

//--------------------------------------------------------------------------
// Function:	H5Location::p_dereference (protected)
// Purpose	Dereference a ref into an hdf5 object.
// Parameters
//		loc_id - IN: An hdf5 identifier specifying the location of the
//			 referenced object
//		ref - IN: Reference pointer
//		ref_type - IN: Reference type
// Exception	H5::ReferenceException
// Programmer	Binh-Minh Ribler - Oct, 2006
// Modification
//	May 2008 - BMR
//		Moved from IdComponent.
//--------------------------------------------------------------------------
hid_t H5Location::p_dereference(hid_t loc_id, const void* ref, H5R_type_t ref_type)
{
   hid_t temp_id;
   temp_id = H5Rdereference2(loc_id, H5P_DEFAULT, ref_type, ref);
   if (temp_id < 0)
   {
      throw ReferenceException("", "H5Rdereference failed");
   }

   // No failure, set id to the object
   return(temp_id);
}

//--------------------------------------------------------------------------
// Function:	H5Location::dereference
///\brief	Dereferences a reference into an HDF5 object, given an HDF5 object.
///\param	obj - IN: Object specifying the location of the referenced object
///\param	ref - IN: Reference pointer
///\param	ref_type - IN: Reference type
///\exception	H5::ReferenceException
// Programmer   Binh-Minh Ribler - Oct, 2006
// Modification
//	May, 2008
//		Corrected missing parameters. - BMR
//--------------------------------------------------------------------------
void H5Location::dereference(H5Object& obj, const void* ref, H5R_type_t ref_type)
{
   hid_t temp_id;
   try {
      temp_id = p_dereference(obj.getId(), ref, ref_type);
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::dereference - located by object", E.getDetailMsg());
   }
   p_setId(temp_id);
}

//--------------------------------------------------------------------------
// Function:	H5Location::dereference
///\brief	Dereferences a reference into an HDF5 object, given an HDF5 file.
///\param	h5file - IN: HDF5 file specifying the location of the referenced object
///\param	ref - IN: Reference pointer
///\param	ref_type - IN: Reference type
///\exception	H5::ReferenceException
// Programmer   Binh-Minh Ribler - Oct, 2006
// Modification
//	May, 2008
//		Corrected missing parameters. - BMR
//--------------------------------------------------------------------------
void H5Location::dereference(H5File& h5file, const void* ref, H5R_type_t ref_type)
{
   hid_t temp_id;
   try {
      temp_id = p_dereference(h5file.getId(), ref, ref_type);
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::dereference - located by file", E.getDetailMsg());
   }
   p_setId(temp_id);
}

//--------------------------------------------------------------------------
// Function:	H5Location::dereference
///\brief	Dereferences a reference into an HDF5 object, given an attribute.
///\param	attr - IN: Attribute specifying the location of the referenced object
///\param	ref - IN: Reference pointer
///\param	ref_type - IN: Reference type
///\exception	H5::ReferenceException
// Programmer   Binh-Minh Ribler - Oct, 2006
// Modification
//	May, 2008
//		Corrected missing parameters. - BMR
//--------------------------------------------------------------------------
void H5Location::dereference(Attribute& attr, const void* ref, H5R_type_t ref_type)
{
   hid_t temp_id;
   try {
      temp_id = p_dereference(attr.getId(), ref, ref_type);
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::dereference - located by attribute", E.getDetailMsg());
   }
   p_setId(temp_id);
}

#ifndef H5_NO_DEPRECATED_SYMBOLS
//--------------------------------------------------------------------------
// Function:	H5Location::getObjType
///\brief	Retrieves the type of object that an object reference points to.
///\param	ref_type - IN: Type of reference to query, valid values are:
///		\li \c H5R_OBJECT \tReference is an object reference.
///		\li \c H5R_DATASET_REGION \tReference is a dataset region reference.
///\param	ref      - IN: Reference to query
///\return	An object type, which can be one of the following:
///		\li \c H5G_UNKNOWN \tA failure occurs. (-1)
///		\li \c H5G_GROUP \tObject is a group.
///		\li \c H5G_DATASET \tObject is a dataset.
///		\li \c H5G_TYPE Object \tis a named datatype
///		\li \c H5G_LINK \tObject is a symbolic link.
///		\li \c H5G_UDLINK \tObject is a user-defined link.
///\exception	H5::ReferenceException
// Programmer	Binh-Minh Ribler - May, 2004
// Modification
//	Sep 2012: Moved up from H5File, Group, DataSet, and DataType
//--------------------------------------------------------------------------
H5G_obj_t H5Location::getObjType(void *ref, H5R_type_t ref_type) const
{
   try {
      return(p_get_obj_type(ref, ref_type));
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::getObjType", E.getDetailMsg());
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::p_get_obj_type (protected)
// Purpose      Retrieves the type of object that an object reference points to.
// Parameters
//              ref      - IN: Reference to query
//              ref_type - IN: Type of reference to query
// Return       An object type, which can be one of the following:
//                      H5G_UNKNOWN \tFailure occurs (-1)
//                      H5G_GROUP \tObject is a group.
//                      H5G_DATASET \tObject is a dataset.
//                      H5G_TYPE Object \tis a named datatype.
//                      H5G_LINK \tObject is a symbolic link.
//                      H5G_UDLINK \tObject is a user-defined link.
// Exception    H5::ReferenceException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
H5G_obj_t H5Location::p_get_obj_type(void *ref, H5R_type_t ref_type) const
{
   H5G_obj_t obj_type = H5Rget_obj_type1(getId(), ref_type, ref);

   if (obj_type == H5G_UNKNOWN)
   {
      throw ReferenceException("", "H5Rget_obj_type1 failed");
   }
   return(obj_type);
}
#endif /* H5_NO_DEPRECATED_SYMBOLS */


//--------------------------------------------------------------------------
// Function:    H5Location::getRefObjType
///\brief       Retrieves the type of object that an object reference points to.
///\param       ref      - IN: Reference to query
///\param       ref_type - IN: Type of reference to query, valid values are:
///             \li \c H5R_OBJECT         - Reference is an object reference.
///             \li \c H5R_DATASET_REGION - Reference is a dataset region reference.
///\return      An object type, which can be one of the following:
///             \li \c H5O_TYPE_UNKNOWN	- Unknown object type (-1)
///             \li \c H5O_TYPE_GROUP	- Object is a group
///             \li \c H5O_TYPE_DATASET	- Object is a dataset
///             \li \c H5O_TYPE_NAMED_DATATYPE - Object is a named datatype
///             \li \c H5O_TYPE_NTYPES	- Number of different object types
///\exception   H5::ReferenceException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
H5O_type_t H5Location::getRefObjType(void *ref, H5R_type_t ref_type) const
{
   try {
      return(p_get_ref_obj_type(ref, ref_type));
   }
   catch (ReferenceException E) {
      throw ReferenceException("H5Location::getRefObjType", E.getDetailMsg());
   }
}

//--------------------------------------------------------------------------
// Function:    H5Location::p_get_ref_obj_type (protected)
// Purpose      Retrieves the type of object that an object reference points to.
// Parameters
//              ref      - IN: Reference to query
//              ref_type - IN: Type of reference to query
// Return       An object type, which can be one of the following:
//			H5O_TYPE_UNKNOWN	- Unknown object type (-1)
//			H5O_TYPE_GROUP		- Object is a group
//			H5O_TYPE_DATASET	- Object is a dataset
//			H5O_TYPE_NAMED_DATATYPE - Object is a named datatype
//			H5O_TYPE_NTYPES		- Number of object types
// Exception    H5::ReferenceException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
H5O_type_t H5Location::p_get_ref_obj_type(void *ref, H5R_type_t ref_type) const
{
   H5O_type_t obj_type = H5O_TYPE_UNKNOWN;
   herr_t ret_value = H5Rget_obj_type2(getId(), ref_type, ref, &obj_type);

   if (obj_type == H5O_TYPE_UNKNOWN || obj_type >= H5O_TYPE_NTYPES)
   {
      throw ReferenceException("", "H5Rget_obj_type2 failed");
   }
   return(obj_type);
}


//--------------------------------------------------------------------------
// Function:    H5Location::p_get_region (protected)
// Purpose      Retrieves a dataspace with the region pointed to selected.
// Parameters
//              ref_type - IN: Type of reference to get region of - default
//                              to H5R_DATASET_REGION
//              ref      - IN: Reference to get region of
// Return       Dataspace id
// Exception    H5::ReferenceException
// Programmer   Binh-Minh Ribler - May, 2004
//--------------------------------------------------------------------------
hid_t H5Location::p_get_region(void *ref, H5R_type_t ref_type) const
{
   hid_t space_id = H5Rget_region(getId(), ref_type, ref);
   if (space_id < 0)
   {
      throw ReferenceException("", "H5Rget_region failed");
   }
   return(space_id);
}


//--------------------------------------------------------------------------
// Function:	H5Location destructor
///\brief	Noop destructor.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Location::~H5Location() {}

#ifndef H5_NO_NAMESPACE
} // end namespace
#endif