-
Notifications
You must be signed in to change notification settings - Fork 10.6k
Expand file tree
/
Copy pathQueryCollection.cs
More file actions
253 lines (229 loc) · 7.58 KB
/
QueryCollection.cs
File metadata and controls
253 lines (229 loc) · 7.58 KB
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
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Diagnostics;
using Microsoft.AspNetCore.Shared;
using Microsoft.Extensions.Primitives;
namespace Microsoft.AspNetCore.Http;
/// <summary>
/// The HttpRequest query string collection
/// </summary>
[DebuggerDisplay("Count = {Count}")]
[DebuggerTypeProxy(typeof(StringValuesDictionaryDebugView))]
public class QueryCollection : IQueryCollection
{
/// <summary>
/// Gets an empty <see cref="QueryCollection"/>.
/// </summary>
public static readonly QueryCollection Empty = new QueryCollection();
private static readonly string[] EmptyKeys = Array.Empty<string>();
// Pre-box
private static readonly IEnumerator<KeyValuePair<string, StringValues>> EmptyIEnumeratorType = default(Enumerator);
private static readonly IEnumerator EmptyIEnumerator = default(Enumerator);
private Dictionary<string, StringValues>? Store { get; }
/// <summary>
/// Initializes a new instance of <see cref="QueryCollection"/>.
/// </summary>
public QueryCollection()
{
}
/// <summary>
/// Initializes a new instance of <see cref="QueryCollection"/>.
/// </summary>
/// <param name="store">The backing store.</param>
public QueryCollection(Dictionary<string, StringValues> store)
{
Store = store;
}
/// <summary>
/// Creates a shallow copy of the specified <paramref name="store"/>.
/// </summary>
/// <param name="store">The <see cref="QueryCollection"/> to clone.</param>
public QueryCollection(QueryCollection store)
{
Store = store.Store;
}
/// <summary>
/// Initializes a new instance of <see cref="QueryCollection"/>.
/// </summary>
/// <param name="capacity">The initial number of query items that this instance can contain.</param>
public QueryCollection(int capacity)
{
Store = new Dictionary<string, StringValues>(capacity, StringComparer.OrdinalIgnoreCase);
}
/// <summary>
/// Gets the associated set of values from the collection.
/// </summary>
/// <param name="key">The key name.</param>
/// <returns>the associated value from the collection as a StringValues or StringValues.Empty if the key is not present.</returns>
public StringValues this[string key]
{
get
{
if (Store == null)
{
return StringValues.Empty;
}
if (TryGetValue(key, out var value))
{
return value;
}
return StringValues.Empty;
}
}
/// <summary>
/// Gets the number of elements contained in the <see cref="QueryCollection" />;.
/// </summary>
/// <returns>The number of elements contained in the <see cref="QueryCollection" />.</returns>
public int Count
{
get
{
if (Store == null)
{
return 0;
}
return Store.Count;
}
}
/// <summary>
/// Gets the collection of query names in this instance.
/// </summary>
public ICollection<string> Keys
{
get
{
if (Store == null)
{
return EmptyKeys;
}
return Store.Keys;
}
}
/// <summary>
/// Determines whether the <see cref="QueryCollection" /> contains a specific key.
/// </summary>
/// <param name="key">The key.</param>
/// <returns>true if the <see cref="QueryCollection" /> contains a specific key; otherwise, false.</returns>
public bool ContainsKey(string key)
{
if (Store == null)
{
return false;
}
return Store.ContainsKey(key);
}
/// <summary>
/// Retrieves a value from the collection.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="value">The value.</param>
/// <returns>true if the <see cref="QueryCollection" /> contains the key; otherwise, false.</returns>
public bool TryGetValue(string key, out StringValues value)
{
if (Store == null)
{
value = default(StringValues);
return false;
}
return Store.TryGetValue(key, out value);
}
/// <summary>
/// Returns an enumerator that iterates through a collection.
/// </summary>
/// <returns>An <see cref="Enumerator" /> object that can be used to iterate through the collection.</returns>
public Enumerator GetEnumerator()
{
if (Store == null || Store.Count == 0)
{
// Non-boxed Enumerator
return default;
}
return new Enumerator(Store.GetEnumerator());
}
/// <summary>
/// Returns an enumerator that iterates through a collection.
/// </summary>
/// <returns>An <see cref="IEnumerator{T}" /> object that can be used to iterate through the collection.</returns>
IEnumerator<KeyValuePair<string, StringValues>> IEnumerable<KeyValuePair<string, StringValues>>.GetEnumerator()
{
if (Store == null || Store.Count == 0)
{
// Non-boxed Enumerator
return EmptyIEnumeratorType;
}
return Store.GetEnumerator();
}
/// <summary>
/// Returns an enumerator that iterates through a collection.
/// </summary>
/// <returns>An <see cref="IEnumerator" /> object that can be used to iterate through the collection.</returns>
IEnumerator IEnumerable.GetEnumerator()
{
if (Store == null || Store.Count == 0)
{
// Non-boxed Enumerator
return EmptyIEnumerator;
}
return Store.GetEnumerator();
}
/// <summary>
/// Enumerates a <see cref="QueryCollection"/>.
/// </summary>
public struct Enumerator : IEnumerator<KeyValuePair<string, StringValues>>
{
// Do NOT make this readonly, or MoveNext will not work
private Dictionary<string, StringValues>.Enumerator _dictionaryEnumerator;
private readonly bool _notEmpty;
internal Enumerator(Dictionary<string, StringValues>.Enumerator dictionaryEnumerator)
{
_dictionaryEnumerator = dictionaryEnumerator;
_notEmpty = true;
}
/// <summary>
/// Advances the enumerator to the next element of the <see cref="HeaderDictionary"/>.
/// </summary>
/// <returns><see langword="true"/> if the enumerator was successfully advanced to the next element;
/// <see langword="false"/> if the enumerator has passed the end of the collection.</returns>
public bool MoveNext()
{
if (_notEmpty)
{
return _dictionaryEnumerator.MoveNext();
}
return false;
}
/// <summary>
/// Gets the element at the current position of the enumerator.
/// </summary>
public KeyValuePair<string, StringValues> Current
{
get
{
if (_notEmpty)
{
return _dictionaryEnumerator.Current;
}
return default(KeyValuePair<string, StringValues>);
}
}
/// <inheritdoc />
public void Dispose()
{
}
object IEnumerator.Current
{
get
{
return Current;
}
}
void IEnumerator.Reset()
{
if (_notEmpty)
{
((IEnumerator)_dictionaryEnumerator).Reset();
}
}
}
}