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&#160;<span id="projectnumber">3.0.3</span>
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<li class="navelem"><a class="el" href="dir_1efe588324fc547683bba4a3f1bac847.html">core</a></li><li class="navelem"><a class="el" href="dir_508bd2a9867f606940156debe4946ca8.html">Index</a></li> </ul>
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<div class="title">MultiLevelSkipListReader.cs</div> </div>
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<a href="_multi_level_skip_list_reader_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>&#160;<span class="comment">/* </span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<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>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment"> * (the &quot;License&quot;); you may not use this file except in compliance with</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<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>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<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>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<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>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<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>&#160;<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>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_multi_level_skip_list_reader_8cs.html#a4770f48c7bfb99d5245f65069d5ff4e0"> 20</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_compound_file_reader_8cs.html#a4770f48c7bfb99d5245f65069d5ff4e0">BufferedIndexInput</a> = Lucene.Net.Store.BufferedIndexInput;</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_multi_level_skip_list_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee"> 21</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> = Lucene.Net.Store.IndexInput;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Index</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;{</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html"> 34</a></span>&#160; <span class="keyword">abstract</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html" title="This abstract class reads skip lists with multiple levels.">MultiLevelSkipListReader</a> : IDisposable</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="comment">// the maximum number of skip levels possible for this index</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">int</span> maxNumberOfSkipLevels;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="comment">// number of levels in this skip list</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> numberOfSkipLevels;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// Expert: defines the number of top skip levels to buffer in memory.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="comment">// Reducing this number results in less memory usage, but possibly</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="comment">// slower performance due to more random I/Os.</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="comment">// Please notice that the space each level occupies is limited by</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="comment">// the skipInterval. The top level can not contain more than</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="comment">// skipLevel entries, the second top level can not contain more</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="comment">// than skipLevel^2 entries and so forth.</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keyword">private</span> <span class="keyword">const</span> <span class="keywordtype">int</span> numberOfLevelsToBuffer = 1;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> docCount;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> haveSkipped;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">private</span> readonly <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>[] skipStream; <span class="comment">// skipStream for each level</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">long</span>[] skipPointer; <span class="comment">// the start pointer of each skip level</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">int</span>[] skipInterval; <span class="comment">// skipInterval of each level</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">int</span>[] numSkipped; <span class="comment">// number of docs skipped per level</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">int</span>[] skipDoc; <span class="comment">// doc id of current skip entry per level </span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> lastDoc; <span class="comment">// doc id of last read skip entry with docId &lt;= target</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">long</span>[] childPointer; <span class="comment">// child pointer of current skip entry per level</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">private</span> <span class="keywordtype">long</span> lastChildPointer; <span class="comment">// childPointer of last read skip entry with docId &lt;= target</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">bool</span> inputIsBuffered;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html#a8d6d7bd1cd8ac237fe4d87ca0bef9961"> 68</a></span>&#160; <span class="keyword">protected</span> <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html" title="This abstract class reads skip lists with multiple levels.">MultiLevelSkipListReader</a>(<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> skipStream, <span class="keywordtype">int</span> maxSkipLevels, <span class="keywordtype">int</span> skipInterval)</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; this.skipStream = <span class="keyword">new</span> <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>[maxSkipLevels];</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; this.skipPointer = <span class="keyword">new</span> <span class="keywordtype">long</span>[maxSkipLevels];</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; this.childPointer = <span class="keyword">new</span> <span class="keywordtype">long</span>[maxSkipLevels];</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; this.numSkipped = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxSkipLevels];</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; this.maxNumberOfSkipLevels = maxSkipLevels;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; this.skipInterval = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxSkipLevels];</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; this.skipStream[0] = skipStream;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; this.inputIsBuffered = (skipStream is <a class="code" href="_compound_file_reader_8cs.html#a4770f48c7bfb99d5245f65069d5ff4e0">BufferedIndexInput</a>);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; this.skipInterval[0] = skipInterval;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; maxSkipLevels; i++)</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="comment">// cache skip intervals</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; this.skipInterval[i] = this.skipInterval[i - 1] * skipInterval;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; skipDoc = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxSkipLevels];</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; }</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> GetDoc()</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keywordflow">return</span> lastDoc;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; }</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> SkipTo(<span class="keywordtype">int</span> target)</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; {</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">if</span> (!haveSkipped)</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="comment">// first time, load skip levels</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; LoadSkipLevels();</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; haveSkipped = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="comment">// walk up the levels until highest level is found that has a skip</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="comment">// for this target</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <span class="keywordtype">int</span> level = 0;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">while</span> (level &lt; numberOfSkipLevels - 1 &amp;&amp; target &gt; skipDoc[level + 1])</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; level++;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordflow">while</span> (level &gt;= 0)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keywordflow">if</span> (target &gt; skipDoc[level])</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">if</span> (!LoadNextSkip(level))</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; }</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="comment">// no more skips on this level, go down one level</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keywordflow">if</span> (level &gt; 0 &amp;&amp; lastChildPointer &gt; skipStream[level - 1].FilePointer)</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; SeekChild(level - 1);</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; level--;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; }</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keywordflow">return</span> numSkipped[0] - skipInterval[0] - 1;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> LoadNextSkip(<span class="keywordtype">int</span> level)</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="comment">// we have to skip, the target document is greater than the current</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="comment">// skip list entry </span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; SetLastSkipData(level);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; numSkipped[level] += skipInterval[level];</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="keywordflow">if</span> (numSkipped[level] &gt; docCount)</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <span class="comment">// this skip list is exhausted</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; skipDoc[level] = System.Int32.MaxValue;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">if</span> (numberOfSkipLevels &gt; level)</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; numberOfSkipLevels = level;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; }</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; </div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="comment">// read next skip entry</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; skipDoc[level] += ReadSkipData(level, skipStream[level]);</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="keywordflow">if</span> (level != 0)</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; {</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="comment">// read the child pointer if we are not on the leaf level</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; childPointer[level] = skipStream[level].ReadVLong() + skipPointer[level - 1];</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; }</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; </div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; }</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; </div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> SeekChild(<span class="keywordtype">int</span> level)</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; skipStream[level].Seek(lastChildPointer);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; numSkipped[level] = numSkipped[level + 1] - skipInterval[level + 1];</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; skipDoc[level] = lastDoc;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordflow">if</span> (level &gt; 0)</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; childPointer[level] = skipStream[level].ReadVLong() + skipPointer[level - 1];</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; }</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; }</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html#a6796c6a583d12ec536421f419708dabc"> 181</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> Dispose()</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; {</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; Dispose(<span class="keyword">true</span>);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html#acdc34b69ddb93069a53cbc6a6cf1f912"> 186</a></span>&#160; <span class="keyword">protected</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; {</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keywordflow">if</span> (disposing)</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; skipStream.Length; i++)</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; {</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="keywordflow">if</span> (skipStream[i] != null)</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; {</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; skipStream[i].Close();</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; }</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; }</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> Init(<span class="keywordtype">long</span> skipPointer, <span class="keywordtype">int</span> df)</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; {</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; this.skipPointer[0] = skipPointer;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; this.docCount = df;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; System.Array.Clear(skipDoc, 0, skipDoc.Length);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; System.Array.Clear(numSkipped, 0, numSkipped.Length);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; System.Array.Clear(childPointer, 0, childPointer.Length);</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; haveSkipped = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; numberOfSkipLevels; i++)</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; skipStream[i] = null;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> LoadSkipLevels()</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; numberOfSkipLevels = docCount == 0?0:(int) System.Math.Floor(System.Math.Log(docCount) / System.Math.Log(skipInterval[0]));</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="keywordflow">if</span> (numberOfSkipLevels &gt; maxNumberOfSkipLevels)</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; numberOfSkipLevels = maxNumberOfSkipLevels;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; }</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; </div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; skipStream[0].Seek(skipPointer[0]);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="keywordtype">int</span> toBuffer = numberOfLevelsToBuffer;</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = numberOfSkipLevels - 1; i &gt; 0; i--)</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; {</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="comment">// the length of the current level</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="keywordtype">long</span> length = skipStream[0].ReadVLong();</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="comment">// the start pointer of the current level</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; skipPointer[i] = skipStream[0].FilePointer;</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; <span class="keywordflow">if</span> (toBuffer &gt; 0)</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="comment">// buffer this level</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; skipStream[i] = <span class="keyword">new</span> SkipBuffer(skipStream[0], (<span class="keywordtype">int</span>) length);</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; toBuffer--;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; }</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; {</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; <span class="comment">// clone this stream, it is already at the start of the current level</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; skipStream[i] = (<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>) skipStream[0].Clone();</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keywordflow">if</span> (inputIsBuffered &amp;&amp; length &lt; <a class="code" href="_compound_file_reader_8cs.html#a4770f48c7bfb99d5245f65069d5ff4e0">BufferedIndexInput</a>.BUFFER_SIZE)</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; {</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; ((<a class="code" href="_compound_file_reader_8cs.html#a4770f48c7bfb99d5245f65069d5ff4e0">BufferedIndexInput</a>) skipStream[i]).SetBufferSize((<span class="keywordtype">int</span>) length);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; }</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <span class="comment">// move base stream beyond the current level</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; skipStream[0].Seek(skipStream[0].FilePointer + length);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; }</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; }</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="comment">// use base stream for the lowest level</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; skipPointer[0] = skipStream[0].FilePointer;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">abstract</span> <span class="keywordtype">int</span> ReadSkipData(<span class="keywordtype">int</span> level, <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> skipStream);</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; </div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> SetLastSkipData(<span class="keywordtype">int</span> level)</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; {</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; lastDoc = skipDoc[level];</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; lastChildPointer = childPointer[level];</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; }</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; </div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; <span class="keyword">private</span> sealed <span class="keyword">class </span>SkipBuffer : <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; {</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; <span class="keyword">private</span> byte[] data;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; <span class="keyword">private</span> readonly <span class="keywordtype">long</span> pointer;</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> pos;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <span class="keyword">internal</span> SkipBuffer(<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> input, <span class="keywordtype">int</span> length)</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; data = <span class="keyword">new</span> byte[length];</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; pointer = input.FilePointer;</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; input.ReadBytes(data, 0, length);</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; }</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160;</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; {</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="keywordflow">if</span> (disposing)</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; {</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; data = null;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; }</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> FilePointer</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; {</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> pointer + pos; }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; }</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160;</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length()</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; {</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="keywordflow">return</span> data.Length;</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; }</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; </div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> byte ReadByte()</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; {</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; <span class="keywordflow">return</span> data[pos++];</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; }</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; </div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> ReadBytes(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> len)</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; {</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; Array.Copy(data, pos, b, offset, len);</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; pos += len;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; }</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Seek(<span class="keywordtype">long</span> pos)</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; {</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; this.pos = (int) (pos - pointer);</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; }</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <span class="keyword">override</span> <span class="keyword">public</span> System.Object Clone()</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; {</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; System.Diagnostics.Debug.Fail(<span class="stringliteral">&quot;Port issue:&quot;</span>, <span class="stringliteral">&quot;Lets see if we need this FilterIndexReader.Clone()&quot;</span>); <span class="comment">// {{Aroush-2.9}}</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; <span class="keywordflow">return</span> null;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; }</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; }</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; }</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160;}</div>
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