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
|
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
* This software is subject to the Microsoft Public License (Ms-PL).
* A copy of the license can be found in the license.htm file included
* in this distribution.
*
* You must not remove this notice, or any other, from this software.
*
* ***************************************************************************/
namespace System.Web.Mvc {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Runtime.Serialization;
[Serializable]
public class TempDataDictionary : IDictionary<string, object>, ISerializable {
internal const string _tempDataSerializationKey = "__tempData";
private Dictionary<string, object> _data;
private HashSet<string> _initialKeys = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
private HashSet<string> _retainedKeys = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
public TempDataDictionary() {
_data = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
}
protected TempDataDictionary(SerializationInfo info, StreamingContext context) {
_data = info.GetValue(_tempDataSerializationKey, typeof(Dictionary<string, object>)) as Dictionary<string, object>;
}
public int Count {
get {
return _data.Count;
}
}
public ICollection<string> Keys {
get {
return _data.Keys;
}
}
public void Keep() {
_retainedKeys.Clear();
_retainedKeys.UnionWith(_data.Keys);
}
public void Keep(string key) {
_retainedKeys.Add(key);
}
public void Load(ControllerContext controllerContext, ITempDataProvider tempDataProvider) {
IDictionary<string, object> providerDictionary = tempDataProvider.LoadTempData(controllerContext);
_data = (providerDictionary != null) ? new Dictionary<string, object>(providerDictionary, StringComparer.OrdinalIgnoreCase) :
new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
_initialKeys = new HashSet<string>(_data.Keys, StringComparer.OrdinalIgnoreCase);
_retainedKeys.Clear();
}
public object Peek(string key) {
object value;
_data.TryGetValue(key, out value);
return value;
}
public void Save(ControllerContext controllerContext, ITempDataProvider tempDataProvider) {
string[] keysToKeep = _initialKeys.Union(_retainedKeys, StringComparer.OrdinalIgnoreCase).ToArray();
string[] keysToRemove = _data.Keys.Except(keysToKeep, StringComparer.OrdinalIgnoreCase).ToArray();
foreach (string key in keysToRemove) {
_data.Remove(key);
}
tempDataProvider.SaveTempData(controllerContext, _data);
}
public ICollection<object> Values {
get {
return _data.Values;
}
}
public object this[string key] {
get {
object value;
if (TryGetValue(key, out value)) {
_initialKeys.Remove(key);
return value;
}
return null;
}
set {
_data[key] = value;
_initialKeys.Add(key);
}
}
public void Add(string key, object value) {
_data.Add(key, value);
_initialKeys.Add(key);
}
public void Clear() {
_data.Clear();
_retainedKeys.Clear();
_initialKeys.Clear();
}
public bool ContainsKey(string key) {
return _data.ContainsKey(key);
}
public bool ContainsValue(object value) {
return _data.ContainsValue(value);
}
public IEnumerator<KeyValuePair<string, object>> GetEnumerator() {
return new TempDataDictionaryEnumerator(this);
}
protected virtual void GetObjectData(SerializationInfo info, StreamingContext context) {
info.AddValue(_tempDataSerializationKey, _data);
}
public bool Remove(string key) {
_retainedKeys.Remove(key);
_initialKeys.Remove(key);
return _data.Remove(key);
}
public bool TryGetValue(string key, out object value) {
_initialKeys.Remove(key);
return _data.TryGetValue(key, out value);
}
#region ICollection<KeyValuePair<string, object>> Implementation
bool ICollection<KeyValuePair<string, object>>.IsReadOnly {
get {
return ((ICollection<KeyValuePair<string, object>>)_data).IsReadOnly;
}
}
void ICollection<KeyValuePair<string, object>>.CopyTo(KeyValuePair<string, object>[] array, int index) {
((ICollection<KeyValuePair<string, object>>)_data).CopyTo(array, index);
}
void ICollection<KeyValuePair<string, object>>.Add(KeyValuePair<string, object> keyValuePair) {
_initialKeys.Add(keyValuePair.Key);
((ICollection<KeyValuePair<string, object>>)_data).Add(keyValuePair);
}
bool ICollection<KeyValuePair<string, object>>.Contains(KeyValuePair<string, object> keyValuePair) {
return ((ICollection<KeyValuePair<string, object>>)_data).Contains(keyValuePair);
}
bool ICollection<KeyValuePair<string, object>>.Remove(KeyValuePair<string, object> keyValuePair) {
_initialKeys.Remove(keyValuePair.Key);
return ((ICollection<KeyValuePair<string, object>>)_data).Remove(keyValuePair);
}
#endregion
#region IEnumerable Implementation
IEnumerator IEnumerable.GetEnumerator() {
return (IEnumerator)(new TempDataDictionaryEnumerator(this));
}
#endregion
#region ISerializable Members
[SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) {
GetObjectData(info, context);
}
#endregion
private sealed class TempDataDictionaryEnumerator : IEnumerator<KeyValuePair<string, object>> {
private IEnumerator<KeyValuePair<string, object>> _enumerator;
private TempDataDictionary _tempData;
public TempDataDictionaryEnumerator(TempDataDictionary tempData) {
_tempData = tempData;
_enumerator = _tempData._data.GetEnumerator();
}
public KeyValuePair<string, object> Current {
get {
KeyValuePair<string, object> kvp = _enumerator.Current;
_tempData._initialKeys.Remove(kvp.Key);
return kvp;
}
}
public bool MoveNext() {
return _enumerator.MoveNext();
}
public void Reset() {
_enumerator.Reset();
}
#region IEnumerator Implementation
object IEnumerator.Current {
get {
return Current;
}
}
#endregion
#region IDisposable Implementation
void IDisposable.Dispose() {
_enumerator.Dispose();
}
#endregion
}
}
}
|
