forked from PowerShell/PowerShell
/
JsonObject.cs
796 lines (709 loc) · 32.5 KB
/
JsonObject.cs
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
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Management.Automation;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Threading;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
namespace Microsoft.PowerShell.Commands
{
/// <summary>
/// JsonObject class.
/// </summary>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Preferring Json over JSON")]
public static class JsonObject
{
#region HelperTypes
/// <summary>
/// Context for convert-to-json operation.
/// </summary>
public readonly struct ConvertToJsonContext
{
/// <summary>
/// Gets the maximum depth for walking the object graph.
/// </summary>
public readonly int MaxDepth;
/// <summary>
/// Gets the cancellation token.
/// </summary>
public readonly CancellationToken CancellationToken;
/// <summary>
/// Gets the StringEscapeHandling setting.
/// </summary>
public readonly StringEscapeHandling StringEscapeHandling;
/// <summary>
/// Gets the EnumsAsStrings setting.
/// </summary>
public readonly bool EnumsAsStrings;
/// <summary>
/// Gets the CompressOutput setting.
/// </summary>
public readonly bool CompressOutput;
/// <summary>
/// Gets the target cmdlet that is doing the convert-to-json operation.
/// </summary>
public readonly PSCmdlet Cmdlet;
/// <summary>
/// Constructor of ConvertToJsonContext.
/// </summary>
public ConvertToJsonContext(int maxDepth, bool enumsAsStrings, bool compressOutput)
: this(maxDepth, enumsAsStrings, compressOutput, CancellationToken.None, StringEscapeHandling.Default, targetCmdlet: null)
{
}
/// <summary>
/// Constructor of ConvertToJsonContext.
/// </summary>
public ConvertToJsonContext(
int maxDepth,
bool enumsAsStrings,
bool compressOutput,
CancellationToken cancellationToken,
StringEscapeHandling stringEscapeHandling,
PSCmdlet targetCmdlet)
{
this.MaxDepth = maxDepth;
this.CancellationToken = cancellationToken;
this.StringEscapeHandling = stringEscapeHandling;
this.EnumsAsStrings = enumsAsStrings;
this.CompressOutput = compressOutput;
this.Cmdlet = targetCmdlet;
}
}
private class DuplicateMemberHashSet : HashSet<string>
{
public DuplicateMemberHashSet(int capacity)
: base(capacity, StringComparer.OrdinalIgnoreCase)
{
}
}
/// <summary>
/// Exception used for cancellation.
/// </summary>
private class StoppingException : System.Exception
{
}
#endregion HelperTypes
#region ConvertFromJson
/// <summary>
/// Convert a Json string back to an object of type PSObject.
/// </summary>
/// <param name="input">The json text to convert.</param>
/// <param name="error">An error record if the conversion failed.</param>
/// <returns>A PSObject.</returns>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Preferring Json over JSON")]
public static object ConvertFromJson(string input, out ErrorRecord error)
{
return ConvertFromJson(input, returnHashtable: false, out error);
}
/// <summary>
/// Convert a Json string back to an object of type <see cref="System.Management.Automation.PSObject"/> or
/// <see cref="System.Collections.Hashtable"/> depending on parameter <paramref name="returnHashtable"/>.
/// </summary>
/// <param name="input">The json text to convert.</param>
/// <param name="returnHashtable">True if the result should be returned as a <see cref="System.Collections.Hashtable"/>
/// instead of a <see cref="System.Management.Automation.PSObject"/></param>
/// <param name="error">An error record if the conversion failed.</param>
/// <returns>A <see cref="System.Management.Automation.PSObject"/> or a <see cref="System.Collections.Hashtable"/>
/// if the <paramref name="returnHashtable"/> parameter is true.</returns>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Preferring Json over JSON")]
public static object ConvertFromJson(string input, bool returnHashtable, out ErrorRecord error)
{
return ConvertFromJson(input, returnHashtable, maxDepth: 1024, out error);
}
/// <summary>
/// Convert a Json string back to an object of type <see cref="System.Management.Automation.PSObject"/> or
/// <see cref="System.Collections.Hashtable"/> depending on parameter <paramref name="returnHashtable"/>.
/// </summary>
/// <param name="input">The json text to convert.</param>
/// <param name="returnHashtable">True if the result should be returned as a <see cref="System.Collections.Hashtable"/>
/// instead of a <see cref="System.Management.Automation.PSObject"/>.</param>
/// <param name="maxDepth">The max depth allowed when deserializing the json input. Set to null for no maximum.</param>
/// <param name="error">An error record if the conversion failed.</param>
/// <returns>A <see cref="System.Management.Automation.PSObject"/> or a <see cref="System.Collections.Hashtable"/>
/// if the <paramref name="returnHashtable"/> parameter is true.</returns>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Preferring Json over JSON")]
public static object ConvertFromJson(string input, bool returnHashtable, int? maxDepth, out ErrorRecord error)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
error = null;
try
{
// JsonConvert.DeserializeObject does not throw an exception when an invalid Json array is passed.
// This issue is being tracked by https://github.com/JamesNK/Newtonsoft.Json/issues/1930.
// To work around this, we need to identify when input is a Json array, and then try to parse it via JArray.Parse().
// If input starts with '[' (ignoring white spaces).
if (Regex.Match(input, @"^\s*\[").Success)
{
// JArray.Parse() will throw a JsonException if the array is invalid.
// This will be caught by the catch block below, and then throw an
// ArgumentException - this is done to have same behavior as the JavaScriptSerializer.
JArray.Parse(input);
// Please note that if the Json array is valid, we don't do anything,
// we just continue the deserialization.
}
var obj = JsonConvert.DeserializeObject(
input,
new JsonSerializerSettings
{
// This TypeNameHandling setting is required to be secure.
TypeNameHandling = TypeNameHandling.None,
MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
MaxDepth = maxDepth
});
switch (obj)
{
case JObject dictionary:
// JObject is a IDictionary
return returnHashtable
? PopulateHashTableFromJDictionary(dictionary, out error)
: PopulateFromJDictionary(dictionary, new DuplicateMemberHashSet(dictionary.Count), out error);
case JArray list:
return returnHashtable
? PopulateHashTableFromJArray(list, out error)
: PopulateFromJArray(list, out error);
default:
return obj;
}
}
catch (JsonException je)
{
var msg = string.Format(CultureInfo.CurrentCulture, WebCmdletStrings.JsonDeserializationFailed, je.Message);
// the same as JavaScriptSerializer does
throw new ArgumentException(msg, je);
}
}
// This function is a clone of PopulateFromDictionary using JObject as an input.
private static PSObject PopulateFromJDictionary(JObject entries, DuplicateMemberHashSet memberHashTracker, out ErrorRecord error)
{
error = null;
var result = new PSObject(entries.Count);
foreach (var entry in entries)
{
if (string.IsNullOrEmpty(entry.Key))
{
var errorMsg = string.Format(CultureInfo.CurrentCulture, WebCmdletStrings.EmptyKeyInJsonString);
error = new ErrorRecord(
new InvalidOperationException(errorMsg),
"EmptyKeyInJsonString",
ErrorCategory.InvalidOperation,
null);
return null;
}
// Case sensitive duplicates should normally not occur since JsonConvert.DeserializeObject
// does not throw when encountering duplicates and just uses the last entry.
if (memberHashTracker.TryGetValue(entry.Key, out var maybePropertyName)
&& string.Compare(entry.Key, maybePropertyName, StringComparison.CurrentCulture) == 0)
{
var errorMsg = string.Format(CultureInfo.CurrentCulture, WebCmdletStrings.DuplicateKeysInJsonString, entry.Key);
error = new ErrorRecord(
new InvalidOperationException(errorMsg),
"DuplicateKeysInJsonString",
ErrorCategory.InvalidOperation,
null);
return null;
}
// Compare case insensitive to tell the user to use the -AsHashTable option instead.
// This is because PSObject cannot have keys with different casing.
if (memberHashTracker.TryGetValue(entry.Key, out var propertyName))
{
var errorMsg = string.Format(CultureInfo.CurrentCulture, WebCmdletStrings.KeysWithDifferentCasingInJsonString, propertyName, entry.Key);
error = new ErrorRecord(
new InvalidOperationException(errorMsg),
"KeysWithDifferentCasingInJsonString",
ErrorCategory.InvalidOperation,
null);
return null;
}
// Array
switch (entry.Value)
{
case JArray list:
{
var listResult = PopulateFromJArray(list, out error);
if (error != null)
{
return null;
}
result.Properties.Add(new PSNoteProperty(entry.Key, listResult));
break;
}
case JObject dic:
{
// Dictionary
var dicResult = PopulateFromJDictionary(dic, new DuplicateMemberHashSet(dic.Count), out error);
if (error != null)
{
return null;
}
result.Properties.Add(new PSNoteProperty(entry.Key, dicResult));
break;
}
case JValue value:
{
result.Properties.Add(new PSNoteProperty(entry.Key, value.Value));
break;
}
}
memberHashTracker.Add(entry.Key);
}
return result;
}
// This function is a clone of PopulateFromList using JArray as input.
private static ICollection<object> PopulateFromJArray(JArray list, out ErrorRecord error)
{
error = null;
var result = new object[list.Count];
for (var index = 0; index < list.Count; index++)
{
var element = list[index];
switch (element)
{
case JArray subList:
{
// Array
var listResult = PopulateFromJArray(subList, out error);
if (error != null)
{
return null;
}
result[index] = listResult;
break;
}
case JObject dic:
{
// Dictionary
var dicResult = PopulateFromJDictionary(dic, new DuplicateMemberHashSet(dic.Count), out error);
if (error != null)
{
return null;
}
result[index] = dicResult;
break;
}
case JValue value:
{
result[index] = value.Value;
break;
}
}
}
return result;
}
// This function is a clone of PopulateFromDictionary using JObject as an input.
private static Hashtable PopulateHashTableFromJDictionary(JObject entries, out ErrorRecord error)
{
error = null;
Hashtable result = new Hashtable(entries.Count);
foreach (var entry in entries)
{
// Case sensitive duplicates should normally not occur since JsonConvert.DeserializeObject
// does not throw when encountering duplicates and just uses the last entry.
if (result.ContainsKey(entry.Key))
{
string errorMsg = string.Format(CultureInfo.CurrentCulture, WebCmdletStrings.DuplicateKeysInJsonString, entry.Key);
error = new ErrorRecord(
new InvalidOperationException(errorMsg),
"DuplicateKeysInJsonString",
ErrorCategory.InvalidOperation,
null);
return null;
}
switch (entry.Value)
{
case JArray list:
{
// Array
var listResult = PopulateHashTableFromJArray(list, out error);
if (error != null)
{
return null;
}
result.Add(entry.Key, listResult);
break;
}
case JObject dic:
{
// Dictionary
var dicResult = PopulateHashTableFromJDictionary(dic, out error);
if (error != null)
{
return null;
}
result.Add(entry.Key, dicResult);
break;
}
case JValue value:
{
result.Add(entry.Key, value.Value);
break;
}
}
}
return result;
}
// This function is a clone of PopulateFromList using JArray as input.
private static ICollection<object> PopulateHashTableFromJArray(JArray list, out ErrorRecord error)
{
error = null;
var result = new object[list.Count];
for (var index = 0; index < list.Count; index++)
{
var element = list[index];
switch (element)
{
case JArray array:
{
// Array
var listResult = PopulateHashTableFromJArray(array, out error);
if (error != null)
{
return null;
}
result[index] = listResult;
break;
}
case JObject dic:
{
// Dictionary
var dicResult = PopulateHashTableFromJDictionary(dic, out error);
if (error != null)
{
return null;
}
result[index] = dicResult;
break;
}
case JValue value:
{
result[index] = value.Value;
break;
}
}
}
return result;
}
#endregion ConvertFromJson
#region ConvertToJson
/// <summary>
/// Convert an object to JSON string.
/// </summary>
public static string ConvertToJson(object objectToProcess, in ConvertToJsonContext context)
{
try
{
// Pre-process the object so that it serializes the same, except that properties whose
// values cannot be evaluated are treated as having the value null.
object preprocessedObject = ProcessValue(objectToProcess, currentDepth: 0, in context);
var jsonSettings = new JsonSerializerSettings
{
// This TypeNameHandling setting is required to be secure.
TypeNameHandling = TypeNameHandling.None,
MaxDepth = 1024,
StringEscapeHandling = context.StringEscapeHandling
};
if (context.EnumsAsStrings)
{
jsonSettings.Converters.Add(new StringEnumConverter());
}
if (!context.CompressOutput)
{
jsonSettings.Formatting = Formatting.Indented;
}
return JsonConvert.SerializeObject(preprocessedObject, jsonSettings);
}
catch (StoppingException)
{
return null;
}
}
/// <summary>
/// Return an alternate representation of the specified object that serializes the same JSON, except
/// that properties that cannot be evaluated are treated as having the value null.
/// Primitive types are returned verbatim. Aggregate types are processed recursively.
/// </summary>
/// <param name="obj">The object to be processed.</param>
/// <param name="currentDepth">The current depth into the object graph.</param>
/// <param name="context">The context to use for the convert-to-json operation.</param>
/// <returns>An object suitable for serializing to JSON.</returns>
private static object ProcessValue(object obj, int currentDepth, in ConvertToJsonContext context)
{
if (context.CancellationToken.IsCancellationRequested)
{
throw new StoppingException();
}
PSObject pso = obj as PSObject;
if (pso != null)
{
obj = pso.BaseObject;
}
object rv = obj;
bool isPurePSObj = false;
bool isCustomObj = false;
if (obj == null
|| DBNull.Value.Equals(obj)
|| obj is string
|| obj is char
|| obj is bool
|| obj is DateTime
|| obj is DateTimeOffset
|| obj is Guid
|| obj is Uri
|| obj is double
|| obj is float
|| obj is decimal)
{
rv = obj;
}
else if (obj is Newtonsoft.Json.Linq.JObject jObject)
{
rv = jObject.ToObject<Dictionary<object, object>>();
}
else
{
Type t = obj.GetType();
if (t.IsPrimitive)
{
rv = obj;
}
else if (t.IsEnum)
{
// Win8:378368 Enums based on System.Int64 or System.UInt64 are not JSON-serializable
// because JavaScript does not support the necessary precision.
Type enumUnderlyingType = Enum.GetUnderlyingType(obj.GetType());
if (enumUnderlyingType.Equals(typeof(Int64)) || enumUnderlyingType.Equals(typeof(UInt64)))
{
rv = obj.ToString();
}
else
{
rv = obj;
}
}
else
{
if (currentDepth > context.MaxDepth)
{
if (pso != null && pso.immediateBaseObjectIsEmpty)
{
// The obj is a pure PSObject, we convert the original PSObject to a string,
// instead of its base object in this case
rv = LanguagePrimitives.ConvertTo(pso, typeof(string),
CultureInfo.InvariantCulture);
isPurePSObj = true;
}
else
{
rv = LanguagePrimitives.ConvertTo(obj, typeof(String),
CultureInfo.InvariantCulture);
}
}
else
{
IDictionary dict = obj as IDictionary;
if (dict != null)
{
rv = ProcessDictionary(dict, currentDepth, in context);
}
else
{
IEnumerable enumerable = obj as IEnumerable;
if (enumerable != null)
{
rv = ProcessEnumerable(enumerable, currentDepth, in context);
}
else
{
rv = ProcessCustomObject<JsonIgnoreAttribute>(obj, currentDepth, in context);
isCustomObj = true;
}
}
}
}
}
rv = AddPsProperties(pso, rv, currentDepth, isPurePSObj, isCustomObj, in context);
return rv;
}
/// <summary>
/// Add to a base object any properties that might have been added to an object (via PSObject) through the Add-Member cmdlet.
/// </summary>
/// <param name="psObj">The containing PSObject, or null if the base object was not contained in a PSObject.</param>
/// <param name="obj">The base object that might have been decorated with additional properties.</param>
/// <param name="depth">The current depth into the object graph.</param>
/// <param name="isPurePSObj">The processed object is a pure PSObject.</param>
/// <param name="isCustomObj">The processed object is a custom object.</param>
/// <param name="context">The context for the operation.</param>
/// <returns>
/// The original base object if no additional properties had been added,
/// otherwise a dictionary containing the value of the original base object in the "value" key
/// as well as the names and values of an additional properties.
/// </returns>
private static object AddPsProperties(object psObj, object obj, int depth, bool isPurePSObj, bool isCustomObj, in ConvertToJsonContext context)
{
PSObject pso = psObj as PSObject;
if (pso == null)
{
return obj;
}
// when isPurePSObj is true, the obj is guaranteed to be a string converted by LanguagePrimitives
if (isPurePSObj)
{
return obj;
}
bool wasDictionary = true;
IDictionary dict = obj as IDictionary;
if (dict == null)
{
wasDictionary = false;
dict = new Dictionary<string, object>();
dict.Add("value", obj);
}
AppendPsProperties(pso, dict, depth, isCustomObj, in context);
if (wasDictionary == false && dict.Count == 1)
{
return obj;
}
return dict;
}
/// <summary>
/// Append to a dictionary any properties that might have been added to an object (via PSObject) through the Add-Member cmdlet.
/// If the passed in object is a custom object (not a simple object, not a dictionary, not a list, get processed in ProcessCustomObject method),
/// we also take Adapted properties into account. Otherwise, we only consider the Extended properties.
/// When the object is a pure PSObject, it also gets processed in "ProcessCustomObject" before reaching this method, so we will
/// iterate both extended and adapted properties for it. Since it's a pure PSObject, there will be no adapted properties.
/// </summary>
/// <param name="psObj">The containing PSObject, or null if the base object was not contained in a PSObject.</param>
/// <param name="receiver">The dictionary to which any additional properties will be appended.</param>
/// <param name="depth">The current depth into the object graph.</param>
/// <param name="isCustomObject">The processed object is a custom object.</param>
/// <param name="context">The context for the operation.</param>
private static void AppendPsProperties(PSObject psObj, IDictionary receiver, int depth, bool isCustomObject, in ConvertToJsonContext context)
{
// serialize only Extended and Adapted properties..
PSMemberInfoCollection<PSPropertyInfo> srcPropertiesToSearch =
new PSMemberInfoIntegratingCollection<PSPropertyInfo>(psObj,
isCustomObject ? PSObject.GetPropertyCollection(PSMemberViewTypes.Extended | PSMemberViewTypes.Adapted) :
PSObject.GetPropertyCollection(PSMemberViewTypes.Extended));
foreach (PSPropertyInfo prop in srcPropertiesToSearch)
{
object value = null;
try
{
value = prop.Value;
}
catch (Exception)
{
}
if (!receiver.Contains(prop.Name))
{
receiver[prop.Name] = ProcessValue(value, depth + 1, in context);
}
}
}
/// <summary>
/// Return an alternate representation of the specified dictionary that serializes the same JSON, except
/// that any contained properties that cannot be evaluated are treated as having the value null.
/// </summary>
private static object ProcessDictionary(IDictionary dict, int depth, in ConvertToJsonContext context)
{
Dictionary<string, object> result = new Dictionary<string, object>(dict.Count);
foreach (DictionaryEntry entry in dict)
{
string name = entry.Key as string;
if (name == null)
{
// use the error string that matches the message from JavaScriptSerializer
string errorMsg = string.Format(
CultureInfo.CurrentCulture,
WebCmdletStrings.NonStringKeyInDictionary,
dict.GetType().FullName);
var exception = new InvalidOperationException(errorMsg);
if (context.Cmdlet != null)
{
var errorRecord = new ErrorRecord(exception, "NonStringKeyInDictionary", ErrorCategory.InvalidOperation, dict);
context.Cmdlet.ThrowTerminatingError(errorRecord);
}
else
{
throw exception;
}
}
result.Add(name, ProcessValue(entry.Value, depth + 1, in context));
}
return result;
}
/// <summary>
/// Return an alternate representation of the specified collection that serializes the same JSON, except
/// that any contained properties that cannot be evaluated are treated as having the value null.
/// </summary>
private static object ProcessEnumerable(IEnumerable enumerable, int depth, in ConvertToJsonContext context)
{
List<object> result = new List<object>();
foreach (object o in enumerable)
{
result.Add(ProcessValue(o, depth + 1, in context));
}
return result;
}
/// <summary>
/// Return an alternate representation of the specified aggregate object that serializes the same JSON, except
/// that any contained properties that cannot be evaluated are treated as having the value null.
///
/// The result is a dictionary in which all public fields and public gettable properties of the original object
/// are represented. If any exception occurs while retrieving the value of a field or property, that entity
/// is included in the output dictionary with a value of null.
/// </summary>
private static object ProcessCustomObject<T>(object o, int depth, in ConvertToJsonContext context)
{
Dictionary<string, object> result = new Dictionary<string, object>();
Type t = o.GetType();
foreach (FieldInfo info in t.GetFields(BindingFlags.Public | BindingFlags.Instance))
{
if (!info.IsDefined(typeof(T), true))
{
object value;
try
{
value = info.GetValue(o);
}
catch (Exception)
{
value = null;
}
result.Add(info.Name, ProcessValue(value, depth + 1, in context));
}
}
foreach (PropertyInfo info2 in t.GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!info2.IsDefined(typeof(T), true))
{
MethodInfo getMethod = info2.GetGetMethod();
if ((getMethod != null) && (getMethod.GetParameters().Length <= 0))
{
object value;
try
{
value = getMethod.Invoke(o, new object[0]);
}
catch (Exception)
{
value = null;
}
result.Add(info2.Name, ProcessValue(value, depth + 1, in context));
}
}
}
return result;
}
#endregion ConvertToJson
}
}