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| <div class="title">SimpleLRUCache.cs</div> </div> |
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| <a href="_simple_l_r_u_cache_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* </span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * limitations under the License.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using</span> System;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">using</span> System.Collections.Generic;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>Lucene.Net.Util.Cache</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_util_1_1_cache_1_1_simple_l_r_u_cache_3_01_t_key_00_01_t_value_01_4.html"> 23</a></span>  <span class="keyword">public</span> <span class="keyword">class </span>SimpleLRUCache<TKey, TValue> : SimpleMapCache<TKey, TValue></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  {</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> capacity;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">private</span> LinkedList<ListValueEntry<TKey, TValue>> list;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">private</span> Dictionary<TKey, LinkedListNode<ListValueEntry<TKey, TValue>>> lookup;</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">private</span> LinkedListNode<ListValueEntry<TKey, TValue>> openNode;</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div> |
| <div class="line"><a name="l00045"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_util_1_1_cache_1_1_simple_l_r_u_cache_3_01_t_key_00_01_t_value_01_4.html#adb04692fd49a1f4e4082aee049e128dd"> 45</a></span>  <span class="keyword">public</span> SimpleLRUCache(<span class="keywordtype">int</span> Capacity)</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  {</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  this.capacity = Capacity;</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  this.list = <span class="keyword">new</span> LinkedList<ListValueEntry<TKey, TValue>>();</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  this.lookup = <span class="keyword">new</span> Dictionary<TKey, LinkedListNode<ListValueEntry<TKey, TValue>>>(Capacity + 1);</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  this.openNode = <span class="keyword">new</span> LinkedListNode<ListValueEntry<TKey, TValue>>(<span class="keyword">new</span> ListValueEntry<TKey, TValue>(<span class="keywordflow">default</span>(TKey), <span class="keywordflow">default</span>(TValue)));</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a name="l00053"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_util_1_1_cache_1_1_simple_l_r_u_cache_3_01_t_key_00_01_t_value_01_4.html#ab553a35a96045f34d42501f0cadb0b9e"> 53</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Put(TKey Key, TValue Value)</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  {</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (Get(Key) == null)</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  {</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  this.openNode.Value.ItemKey = Key;</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  this.openNode.Value.ItemValue = Value;</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  this.list.AddFirst(this.openNode);</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  this.lookup.Add(Key, this.openNode);</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (this.list.Count > <span class="keyword">this</span>.capacity)</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// last node is to be removed and saved for the next addition to the cache</span></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  this.openNode = this.list.Last;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// remove from list & dictionary</span></div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  this.list.RemoveLast();</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  this.lookup.Remove(this.openNode.Value.ItemKey);</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  {</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// still filling the cache, create a new open node for the next time</span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  this.openNode = <span class="keyword">new</span> LinkedListNode<ListValueEntry<TKey, TValue>>(<span class="keyword">new</span> ListValueEntry<TKey, TValue>(<span class="keywordflow">default</span>(TKey), <span class="keywordflow">default</span>(TValue)));</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div> |
| <div class="line"><a name="l00079"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_util_1_1_cache_1_1_simple_l_r_u_cache_3_01_t_key_00_01_t_value_01_4.html#ae7c5bde8903f94c5f883a053e6f3fe66"> 79</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> TValue Get(<span class="keywordtype">object</span> Key)</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  {</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  LinkedListNode<ListValueEntry<TKey, TValue>> node = null;</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (!this.lookup.TryGetValue((TKey)Key, out node))</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> <span class="keywordflow">default</span>(TValue);</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  this.list.Remove(node);</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  this.list.AddFirst(node);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> node.Value.ItemValue;</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">class </span>ListValueEntry<K, V> where K : TKey </div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  where V : TValue</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  {</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">internal</span> V ItemValue;</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">internal</span> K ItemKey;</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">internal</span> ListValueEntry(K key, V value)</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  {</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  this.ItemKey = key;</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  this.ItemValue = value;</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#region NOT_USED_FROM_JLCA_PORT</span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor"></span><span class="comment">/*</span></div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> //</span></div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> // This is the oringal port as it was generated via JLCA.</span></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> // This code is not used. It's here for referance only.</span></div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> //</span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> public class SimpleLRUCache:SimpleMapCache</span></div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> private class AnonymousClassLinkedHashMap : LinkedHashMap</span></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> public AnonymousClassLinkedHashMap(SimpleLRUCache enclosingInstance)</span></div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> InitBlock(enclosingInstance);</span></div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> private void InitBlock(SimpleLRUCache enclosingInstance)</span></div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> this.enclosingInstance = enclosingInstance;</span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> private SimpleLRUCache enclosingInstance;</span></div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> public SimpleLRUCache Enclosing_Instance</span></div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> get</span></div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> return enclosingInstance;</span></div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> protected internal virtual bool RemoveEldestEntry(System.Collections.DictionaryEntry eldest)</span></div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> return size() > Enclosing_Instance.cacheSize;</span></div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> private const float LOADFACTOR = 0.75f;</span></div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> private int cacheSize;</span></div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> public SimpleLRUCache(int cacheSize):base(null)</span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> {</span></div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> this.cacheSize = cacheSize;</span></div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> int capacity = (int) System.Math.Ceiling(cacheSize / LOADFACTOR) + 1;</span></div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> </span></div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> base.map = new AnonymousClassLinkedHashMap(this, capacity, LOADFACTOR, true);</span></div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> }</span></div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment">*/</span></div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor">#endregion</span></div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> }</div> |
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