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| <div class="title">TopScoreDocCollector.cs</div> </div> |
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| <a href="_top_score_doc_collector_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> </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_top_score_doc_collector_8cs.html#a2a6914ea10bbe06764856e29e5674e66"> 20</a></span> <span class="keyword">using</span> <a class="code" href="_more_like_this_8cs.html#a2a6914ea10bbe06764856e29e5674e66">IndexReader</a> = Lucene.Net.Index.IndexReader;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">namespace </span>Lucene.Net.Search</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  </div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html"> 37</a></span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html" title="A Collector implementation that collects the top-scoring hits, returning them as a TopDocs...">TopScoreDocCollector</a> : TopDocsCollector<ScoreDoc></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  {</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Assumes docs are scored in order.</span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">private</span> <span class="keyword">class </span>InOrderTopScoreDocCollector:<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html" title="A Collector implementation that collects the top-scoring hits, returning them as a TopDocs...">TopScoreDocCollector</a></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  {</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">internal</span> InOrderTopScoreDocCollector(<span class="keywordtype">int</span> numHits):base(numHits)</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  {</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</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>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Collect(<span class="keywordtype">int</span> doc)</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  {</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">float</span> score = scorer.Score();</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// This collector cannot handle these scores:</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  System.Diagnostics.Debug.Assert(score != <span class="keywordtype">float</span>.NegativeInfinity);</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  System.Diagnostics.Debug.Assert(!<span class="keywordtype">float</span>.IsNaN(score));</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>  internalTotalHits++;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">if</span> (score <= pqTop.Score)</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  {</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// Since docs are returned in-order (i.e., increasing doc Id), a document</span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// with equal score to pqTop.score cannot compete since HitQueue favors</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// documents with lower doc Ids. Therefore reject those docs too.</span></div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  return ;</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  pqTop.Doc = doc + docBase;</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  pqTop.Score = score;</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  pqTop = pq.UpdateTop();</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> </div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> AcceptsDocsOutOfOrder</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> <span class="keyword">false</span>; }</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</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>  </div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// Assumes docs are scored out of order.</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">private</span> <span class="keyword">class </span>OutOfOrderTopScoreDocCollector:<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html" title="A Collector implementation that collects the top-scoring hits, returning them as a TopDocs...">TopScoreDocCollector</a></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>  <span class="keyword">internal</span> OutOfOrderTopScoreDocCollector(<span class="keywordtype">int</span> numHits):base(numHits)</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  {</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</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>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Collect(<span class="keywordtype">int</span> doc)</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">float</span> score = scorer.Score();</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// This collector cannot handle NaN</span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  System.Diagnostics.Debug.Assert(!<span class="keywordtype">float</span>.IsNaN(score));</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  internalTotalHits++;</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  doc += docBase;</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">if</span> (score < pqTop.Score || (score == pqTop.Score && doc > pqTop.Doc))</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  {</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  return ;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  pqTop.Doc = doc;</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  pqTop.Score = score;</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  pqTop = pq.UpdateTop();</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> </div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> AcceptsDocsOutOfOrder</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">get</span> { <span class="keywordflow">return</span> <span class="keyword">true</span>; }</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>  }</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div> |
| <div class="line"><a name="l00114"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html#ab20cd0063f143c8888c10731b46a6cf3"> 114</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html" title="A Collector implementation that collects the top-scoring hits, returning them as a TopDocs...">TopScoreDocCollector</a> Create(<span class="keywordtype">int</span> numHits, <span class="keywordtype">bool</span> docsScoredInOrder)</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  {</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (docsScoredInOrder)</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> InOrderTopScoreDocCollector(numHits);</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  {</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> OutOfOrderTopScoreDocCollector(numHits);</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  </div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_score_doc.html" title="Expert: Returned by low-level search implementations.">ScoreDoc</a> pqTop;</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> docBase = 0;</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_scorer.html" title="Expert: Common scoring functionality for different types of queries.">Scorer</a> scorer;</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  </div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// prevents instantiation</span></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">private</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html" title="A Collector implementation that collects the top-scoring hits, returning them as a TopDocs...">TopScoreDocCollector</a>(<span class="keywordtype">int</span> numHits):base(new <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_hit_queue.html">HitQueue</a>(numHits, true))</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// HitQueue implements getSentinelObject to return a ScoreDoc, so we know</span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">// that at this point top() is already initialized.</span></div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  pqTop = pq.Top();</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  </div> |
| <div class="line"><a name="l00139"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html#ab941a05be0f0d23b6e765980e9fd68ea"> 139</a></span>  <span class="keyword">public</span> <span class="comment">/*protected internal*/</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_docs.html" title="Represents hits returned by Searcher.Search(Query,Filter,int) and Searcher.Search(Query,int) ">TopDocs</a> NewTopDocs(<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_score_doc.html" title="Expert: Returned by low-level search implementations.">ScoreDoc</a>[] results, <span class="keywordtype">int</span> start)</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  {</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (results == null)</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  {</div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> EMPTY_TOPDOCS;</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  </div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// We need to compute maxScore in order to set it in TopDocs. If start == 0,</span></div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="comment">// it means the largest element is already in results, use its score as</span></div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// maxScore. Otherwise pop everything else, until the largest element is</span></div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// extracted and use its score as maxScore.</span></div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">float</span> maxScore = System.Single.NaN;</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (start == 0)</div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  {</div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  maxScore = results[0].<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_score_doc.html#ac4396542964216dd5e8dac1ea399cf1b" title="Expert: The score of this document for the query. ">Score</a>;</div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  {</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = pq.Size(); i > 1; i--)</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  {</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  pq.Pop();</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  maxScore = pq.Pop().Score;</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  }</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_docs.html" title="Represents hits returned by Searcher.Search(Query,Filter,int) and Searcher.Search(Query,int) ">TopDocs</a>(internalTotalHits, results, maxScore);</div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  </div> |
| <div class="line"><a name="l00167"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html#a976cb3501a573e50b163445bf4fd09d7"> 167</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SetNextReader(<a class="code" href="_more_like_this_8cs.html#a2a6914ea10bbe06764856e29e5674e66">IndexReader</a> reader, <span class="keywordtype">int</span> base_Renamed)</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  {</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  docBase = base_Renamed;</div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div> |
| <div class="line"><a name="l00172"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_top_score_doc_collector.html#a9034980204c042c188d73ada27e3a829"> 172</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SetScorer(<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_scorer.html" title="Expert: Common scoring functionality for different types of queries.">Scorer</a> scorer)</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  {</div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  this.scorer = scorer;</div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> }</div> |
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