wasSharp – Blame information for rev 44
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22 | office | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
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3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
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4 | // rights of fair usage, the disclaimer and warranty conditions. // |
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5 | /////////////////////////////////////////////////////////////////////////// |
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6 | |||
7 | using System.Collections; |
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8 | using System.Collections.Generic; |
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9 | using System.Collections.Specialized; |
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39 | office | 10 | using System.Threading; |
22 | office | 11 | |
12 | namespace wasSharp.Collections.Specialized |
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13 | { |
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14 | /////////////////////////////////////////////////////////////////////////// |
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15 | // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 // |
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16 | /////////////////////////////////////////////////////////////////////////// |
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17 | /// <summary> |
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18 | /// An implementation of an observable Dictionary. |
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19 | /// </summary> |
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20 | /// <typeparam name="K">the key type</typeparam> |
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21 | /// <typeparam name="V">the value type</typeparam> |
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22 | public class ObservableDictionary<K, V> : IDictionary<K, V>, INotifyCollectionChanged |
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23 | { |
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44 | office | 24 | private readonly ReaderWriterLockSlim _lock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion); |
22 | office | 25 | private readonly Dictionary<K, V> store = new Dictionary<K, V>(); |
26 | |||
27 | public bool IsVirgin { get; private set; } = true; |
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28 | |||
29 | public V this[K key] |
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30 | { |
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39 | office | 31 | get |
32 | { |
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44 | office | 33 | _lock.EnterReadLock(); |
34 | try |
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35 | { |
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36 | return store[key]; |
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37 | } |
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38 | finally |
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39 | { |
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40 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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41 | } |
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39 | office | 42 | } |
22 | office | 43 | |
39 | office | 44 | set |
45 | { |
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44 | office | 46 | _lock.EnterWriteLock(); |
47 | try |
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48 | { |
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49 | store[key] = value; |
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50 | } |
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51 | finally |
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52 | { |
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53 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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54 | } |
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39 | office | 55 | } |
22 | office | 56 | } |
57 | |||
58 | public int Count => store.Count; |
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59 | |||
60 | public bool IsReadOnly => false; |
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61 | |||
39 | office | 62 | public ICollection<K> Keys |
63 | { |
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64 | get |
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65 | { |
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44 | office | 66 | _lock.EnterReadLock(); |
67 | try |
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68 | { |
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69 | return store.Keys; |
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70 | } |
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71 | finally |
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72 | { |
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73 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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74 | } |
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39 | office | 75 | } |
76 | } |
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22 | office | 77 | |
39 | office | 78 | public ICollection<V> Values |
79 | { |
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80 | get |
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81 | { |
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44 | office | 82 | _lock.EnterReadLock(); |
83 | try |
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84 | { |
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85 | return store.Values; |
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86 | } |
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87 | finally |
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88 | { |
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89 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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90 | } |
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39 | office | 91 | } |
92 | } |
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22 | office | 93 | |
94 | public void Add(KeyValuePair<K, V> item) |
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95 | { |
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44 | office | 96 | _lock.EnterWriteLock(); |
97 | try |
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98 | { |
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99 | ((IDictionary<K, V>) store).Add(item); |
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100 | } |
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101 | finally |
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102 | { |
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103 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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104 | } |
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22 | office | 105 | IsVirgin = false; |
106 | OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item)); |
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107 | } |
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108 | |||
109 | public void Add(K key, V value) |
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110 | { |
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44 | office | 111 | _lock.EnterWriteLock(); |
112 | try |
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113 | { |
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114 | store.Add(key, value); |
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115 | } |
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116 | finally |
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117 | { |
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118 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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119 | } |
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22 | office | 120 | IsVirgin = false; |
121 | OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, |
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122 | new KeyValuePair<K, V>(key, value))); |
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123 | } |
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124 | |||
125 | public void Clear() |
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126 | { |
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44 | office | 127 | _lock.EnterWriteLock(); |
128 | try |
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129 | { |
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130 | store.Clear(); |
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131 | } |
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132 | finally |
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133 | { |
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134 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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135 | } |
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22 | office | 136 | if (!IsVirgin) |
137 | OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)); |
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138 | IsVirgin = false; |
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139 | } |
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140 | |||
141 | public bool Contains(KeyValuePair<K, V> item) |
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142 | { |
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44 | office | 143 | _lock.EnterReadLock(); |
144 | try |
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145 | { |
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146 | return ((IDictionary<K, V>) store).Contains(item); |
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147 | } |
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148 | finally |
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149 | { |
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150 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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151 | } |
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22 | office | 152 | } |
153 | |||
154 | public bool ContainsKey(K key) |
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155 | { |
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44 | office | 156 | _lock.EnterReadLock(); |
157 | try |
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158 | { |
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159 | return store.ContainsKey(key); |
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160 | } |
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161 | finally |
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162 | { |
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163 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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164 | } |
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22 | office | 165 | } |
166 | |||
167 | public void CopyTo(KeyValuePair<K, V>[] array, int arrayIndex) |
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168 | { |
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44 | office | 169 | _lock.EnterReadLock(); |
170 | try |
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171 | { |
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172 | ((IDictionary<K, V>) store).CopyTo(array, arrayIndex); |
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173 | } |
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174 | finally |
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175 | { |
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176 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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177 | } |
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22 | office | 178 | } |
179 | |||
180 | public IEnumerator<KeyValuePair<K, V>> GetEnumerator() |
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181 | { |
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44 | office | 182 | _lock.EnterReadLock(); |
183 | try |
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184 | { |
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185 | using (var enumerator = ((IDictionary<K, V>)store).GetEnumerator()) |
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186 | { |
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187 | while (enumerator.MoveNext()) |
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188 | yield return enumerator.Current; |
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189 | } |
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190 | } |
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191 | finally |
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192 | { |
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193 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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194 | } |
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22 | office | 195 | } |
196 | |||
197 | public bool Remove(KeyValuePair<K, V> item) |
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198 | { |
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44 | office | 199 | _lock.EnterWriteLock(); |
200 | bool removed; |
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201 | try |
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202 | { |
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203 | removed = ((IDictionary<K, V>) store).Remove(item); |
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204 | } |
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205 | finally |
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206 | { |
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207 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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208 | } |
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22 | office | 209 | IsVirgin = false; |
210 | if (removed) |
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211 | OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item)); |
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212 | return removed; |
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213 | } |
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214 | |||
215 | public bool Remove(K key) |
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216 | { |
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217 | KeyValuePair<K, V> item; |
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44 | office | 218 | _lock.EnterWriteLock(); |
219 | bool removed; |
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220 | try |
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221 | { |
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222 | if (store.ContainsKey(key)) |
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223 | item = new KeyValuePair<K, V>(key, store[key]); |
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22 | office | 224 | |
44 | office | 225 | removed = store.Remove(key); |
226 | } |
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227 | finally |
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228 | { |
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229 | if (_lock.IsWriteLockHeld) _lock.ExitWriteLock(); |
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230 | } |
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22 | office | 231 | IsVirgin = false; |
232 | if (removed) |
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233 | OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item)); |
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234 | return removed; |
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235 | } |
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236 | |||
237 | public bool TryGetValue(K key, out V value) |
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238 | { |
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44 | office | 239 | _lock.EnterReadLock(); |
240 | try |
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241 | { |
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242 | return store.TryGetValue(key, out value); |
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243 | } |
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244 | finally |
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245 | { |
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246 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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247 | } |
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22 | office | 248 | } |
249 | |||
250 | IEnumerator IEnumerable.GetEnumerator() |
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251 | { |
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44 | office | 252 | _lock.EnterReadLock(); |
253 | try |
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254 | { |
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255 | using (var enumerator = ((IDictionary<K, V>)store).GetEnumerator()) |
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256 | { |
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257 | while (enumerator.MoveNext()) |
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258 | yield return enumerator.Current; |
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259 | } |
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260 | } |
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261 | finally |
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262 | { |
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263 | if (_lock.IsReadLockHeld) _lock.ExitReadLock(); |
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264 | } |
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22 | office | 265 | } |
266 | |||
267 | public event NotifyCollectionChangedEventHandler CollectionChanged; |
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268 | |||
269 | private void OnCollectionChanged(NotifyCollectionChangedEventArgs args) |
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270 | { |
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271 | CollectionChanged?.Invoke(this, args); |
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272 | } |
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273 | } |
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27 | office | 274 | } |