/
XmlAtomicValue.cs
423 lines (359 loc) · 14.6 KB
/
XmlAtomicValue.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
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Xml.XPath;
using System.Diagnostics;
namespace System.Xml.Schema
{
/// <summary>
/// This class contains a (CLR Object, XmlType) pair that represents an instance of an Xml atomic value.
/// It is optimized to avoid boxing.
/// </summary>
public sealed class XmlAtomicValue : XPathItem, ICloneable
{
private readonly XmlSchemaType _xmlType;
private readonly object? _objVal;
private readonly TypeCode _clrType;
private Union _unionVal;
private readonly NamespacePrefixForQName? _nsPrefix;
[StructLayout(LayoutKind.Explicit, Size = 8)]
private struct Union
{
[FieldOffset(0)]
public bool boolVal;
[FieldOffset(0)]
public double dblVal;
[FieldOffset(0)]
public long i64Val;
[FieldOffset(0)]
public int i32Val;
[FieldOffset(0)]
public DateTime dtVal;
}
private sealed class NamespacePrefixForQName : IXmlNamespaceResolver
{
public string prefix;
public string ns;
public NamespacePrefixForQName(string prefix, string ns)
{
this.ns = ns;
this.prefix = prefix;
}
public string? LookupNamespace(string? prefix)
{
if (prefix == this.prefix)
{
return ns;
}
return null;
}
public string? LookupPrefix(string? namespaceName)
{
if (ns == namespaceName)
{
return prefix;
}
return null;
}
public IDictionary<string, string> GetNamespacesInScope(XmlNamespaceScope scope)
{
Dictionary<string, string> dict = new Dictionary<string, string>(1);
dict[prefix] = ns;
return dict;
}
}
//-----------------------------------------------
// XmlAtomicValue constructors and methods
//-----------------------------------------------
internal XmlAtomicValue(XmlSchemaType xmlType, bool value)
{
ArgumentNullException.ThrowIfNull(xmlType);
_xmlType = xmlType;
_clrType = TypeCode.Boolean;
_unionVal.boolVal = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, DateTime value)
{
ArgumentNullException.ThrowIfNull(xmlType);
_xmlType = xmlType;
_clrType = TypeCode.DateTime;
_unionVal.dtVal = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, double value)
{
ArgumentNullException.ThrowIfNull(xmlType);
_xmlType = xmlType;
_clrType = TypeCode.Double;
_unionVal.dblVal = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, int value)
{
ArgumentNullException.ThrowIfNull(xmlType);
_xmlType = xmlType;
_clrType = TypeCode.Int32;
_unionVal.i32Val = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, long value)
{
ArgumentNullException.ThrowIfNull(xmlType);
_xmlType = xmlType;
_clrType = TypeCode.Int64;
_unionVal.i64Val = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, string value)
{
ArgumentNullException.ThrowIfNull(xmlType);
ArgumentNullException.ThrowIfNull(value);
_xmlType = xmlType;
_objVal = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, string value, IXmlNamespaceResolver? nsResolver)
{
ArgumentNullException.ThrowIfNull(xmlType);
ArgumentNullException.ThrowIfNull(value);
_xmlType = xmlType;
_objVal = value;
if (nsResolver != null && (_xmlType.TypeCode == XmlTypeCode.QName || _xmlType.TypeCode == XmlTypeCode.Notation))
{
string prefix = GetPrefixFromQName(value)!;
_nsPrefix = new NamespacePrefixForQName(prefix, nsResolver.LookupNamespace(prefix)!);
}
}
internal XmlAtomicValue(XmlSchemaType xmlType, object value)
{
ArgumentNullException.ThrowIfNull(xmlType);
ArgumentNullException.ThrowIfNull(value);
_xmlType = xmlType;
_objVal = value;
}
internal XmlAtomicValue(XmlSchemaType xmlType, object value, IXmlNamespaceResolver? nsResolver)
{
ArgumentNullException.ThrowIfNull(xmlType);
ArgumentNullException.ThrowIfNull(value);
_xmlType = xmlType;
_objVal = value;
if (nsResolver != null && (_xmlType.TypeCode == XmlTypeCode.QName || _xmlType.TypeCode == XmlTypeCode.Notation))
{ //Its a qualifiedName
XmlQualifiedName qname = (_objVal as XmlQualifiedName)!;
Debug.Assert(qname != null); //string representation is handled in a different overload
string ns = qname.Namespace;
_nsPrefix = new NamespacePrefixForQName(nsResolver.LookupPrefix(ns)!, ns);
}
}
/// <summary>
/// Since XmlAtomicValue is immutable, clone simply returns this.
/// </summary>
public XmlAtomicValue Clone()
{
return this;
}
//-----------------------------------------------
// ICloneable methods
//-----------------------------------------------
/// <summary>
/// Since XmlAtomicValue is immutable, clone simply returns this.
/// </summary>
object ICloneable.Clone()
{
return this;
}
//-----------------------------------------------
// XPathItem methods
//-----------------------------------------------
public override bool IsNode
{
get { return false; }
}
public override XmlSchemaType XmlType
{
get { return _xmlType; }
}
public override Type ValueType
{
get { return _xmlType.Datatype!.ValueType; }
}
public override object TypedValue
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ChangeType(_unionVal.boolVal, ValueType);
case TypeCode.Int32: return valueConverter.ChangeType(_unionVal.i32Val, ValueType);
case TypeCode.Int64: return valueConverter.ChangeType(_unionVal.i64Val, ValueType);
case TypeCode.Double: return valueConverter.ChangeType(_unionVal.dblVal, ValueType);
case TypeCode.DateTime: return valueConverter.ChangeType(_unionVal.dtVal, ValueType);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ChangeType(_objVal, ValueType, _nsPrefix);
}
}
public override bool ValueAsBoolean
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return _unionVal.boolVal;
case TypeCode.Int32: return valueConverter.ToBoolean(_unionVal.i32Val);
case TypeCode.Int64: return valueConverter.ToBoolean(_unionVal.i64Val);
case TypeCode.Double: return valueConverter.ToBoolean(_unionVal.dblVal);
case TypeCode.DateTime: return valueConverter.ToBoolean(_unionVal.dtVal);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToBoolean(_objVal);
}
}
public override DateTime ValueAsDateTime
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ToDateTime(_unionVal.boolVal);
case TypeCode.Int32: return valueConverter.ToDateTime(_unionVal.i32Val);
case TypeCode.Int64: return valueConverter.ToDateTime(_unionVal.i64Val);
case TypeCode.Double: return valueConverter.ToDateTime(_unionVal.dblVal);
case TypeCode.DateTime: return _unionVal.dtVal;
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToDateTime(_objVal);
}
}
public override double ValueAsDouble
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ToDouble(_unionVal.boolVal);
case TypeCode.Int32: return valueConverter.ToDouble(_unionVal.i32Val);
case TypeCode.Int64: return valueConverter.ToDouble(_unionVal.i64Val);
case TypeCode.Double: return _unionVal.dblVal;
case TypeCode.DateTime: return valueConverter.ToDouble(_unionVal.dtVal);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToDouble(_objVal);
}
}
public override int ValueAsInt
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ToInt32(_unionVal.boolVal);
case TypeCode.Int32: return _unionVal.i32Val;
case TypeCode.Int64: return valueConverter.ToInt32(_unionVal.i64Val);
case TypeCode.Double: return valueConverter.ToInt32(_unionVal.dblVal);
case TypeCode.DateTime: return valueConverter.ToInt32(_unionVal.dtVal);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToInt32(_objVal);
}
}
public override long ValueAsLong
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ToInt64(_unionVal.boolVal);
case TypeCode.Int32: return valueConverter.ToInt64(_unionVal.i32Val);
case TypeCode.Int64: return _unionVal.i64Val;
case TypeCode.Double: return valueConverter.ToInt64(_unionVal.dblVal);
case TypeCode.DateTime: return valueConverter.ToInt64(_unionVal.dtVal);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToInt64(_objVal);
}
}
public override object ValueAs(Type type, IXmlNamespaceResolver? nsResolver)
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (type == typeof(XPathItem) || type == typeof(XmlAtomicValue))
return this;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ChangeType(_unionVal.boolVal, type);
case TypeCode.Int32: return valueConverter.ChangeType(_unionVal.i32Val, type);
case TypeCode.Int64: return valueConverter.ChangeType(_unionVal.i64Val, type);
case TypeCode.Double: return valueConverter.ChangeType(_unionVal.dblVal, type);
case TypeCode.DateTime: return valueConverter.ChangeType(_unionVal.dtVal, type);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ChangeType(_objVal, type, nsResolver);
}
public override string Value
{
get
{
XmlValueConverter valueConverter = _xmlType.ValueConverter;
if (_objVal == null)
{
switch (_clrType)
{
case TypeCode.Boolean: return valueConverter.ToString(_unionVal.boolVal);
case TypeCode.Int32: return valueConverter.ToString(_unionVal.i32Val);
case TypeCode.Int64: return valueConverter.ToString(_unionVal.i64Val);
case TypeCode.Double: return valueConverter.ToString(_unionVal.dblVal);
case TypeCode.DateTime: return valueConverter.ToString(_unionVal.dtVal);
default: Debug.Fail("Should never get here"); break;
}
}
return valueConverter.ToString(_objVal, _nsPrefix);
}
}
public override string ToString()
{
return Value;
}
private static string? GetPrefixFromQName(string value)
{
int colonOffset;
int len = ValidateNames.ParseQName(value, 0, out colonOffset);
if (len == 0 || len != value.Length)
{
return null;
}
if (colonOffset != 0)
{
return value.Substring(0, colonOffset);
}
else
{
return string.Empty;
}
}
}
}