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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_56f9b3c34a852b92179da152ee78b823.html">Search</a></li><li class="navelem"><a class="el" href="dir_969a26ab3e94e3ca0984802fc6c3fa57.html">Spans</a></li> </ul> |
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| <div class="title">SpanScorer.cs</div> </div> |
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| <a href="_span_scorer_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="_span_scorer_8cs.html#aea5b3dcb7c8a52294feb57dcaa878033"> 20</a></span> <span class="keyword">using</span> <a class="code" href="_custom_score_query_8cs.html#aea5b3dcb7c8a52294feb57dcaa878033">Explanation</a> = Lucene.Net.Search.Explanation;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_span_scorer_8cs.html#a83f1a9bf052559c9fc4b5dc2c3d490f1"> 21</a></span> <span class="keyword">using</span> <a class="code" href="_documents_writer_8cs.html#a83f1a9bf052559c9fc4b5dc2c3d490f1">Scorer</a> = Lucene.Net.Search.Scorer;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"><a class="code" href="_span_scorer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31"> 22</a></span> <span class="keyword">using</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> = Lucene.Net.Search.Similarity;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="_span_scorer_8cs.html#af0d29c976e72f83236dc8d0fa23aaf32"> 23</a></span> <span class="keyword">using</span> <a class="code" href="_documents_writer_8cs.html#af0d29c976e72f83236dc8d0fa23aaf32">Weight</a> = Lucene.Net.Search.Weight;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">namespace </span>Lucene.Net.Search.Spans</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> {</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html"> 28</a></span>  <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html" title="Public for extension only.">SpanScorer</a>:<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></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html" title="Expert: an enumeration of span matches. Used to implement span searching. Each span represents a rang...">Spans</a> spans;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_weight.html" title="Expert: Calculate query weights and build query scorers. The purpose of Weight is to ensure searching...">Weight</a> weight;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> byte[] norms;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keywordtype">float</span> value_Renamed;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keywordtype">bool</span> more = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keywordtype">int</span> doc;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keywordtype">float</span> freq;</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="keyword">protected</span> <span class="keyword">internal</span> <a class="code" href="_payload_near_query_8cs.html#afc2d1c993e3e1aaca2d065feac3a558d">SpanScorer</a>(<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html" title="Expert: an enumeration of span matches. Used to implement span searching. Each span represents a rang...">Spans</a> spans, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_weight.html" title="Expert: Calculate query weights and build query scorers. The purpose of Weight is to ensure searching...">Weight</a> weight, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a> similarity, byte[] norms):base(similarity)</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  {</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  this.spans = spans;</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  this.norms = norms;</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  this.weight = weight;</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  this.value_Renamed = weight.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_weight.html#a3c76b2c40a71faaa86352b5fe90a4bd0" title="The weight for this query. ">Value</a>;</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (this.spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#ac0b2eadf3f45f2d2df28ebb3d4ae05f9" title="Move to the next match, returning true iff any such exists. ">Next</a>())</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  doc = - 1;</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  }</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">else</span></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>  doc = NO_MORE_DOCS;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  more = <span class="keyword">false</span>;</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>  }</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div> |
| <div class="line"><a name="l00057"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html#aa363bb7a35480c0eeade97adbbf52d65"> 57</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> NextDoc()</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  {</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span> (!SetFreqCurrentDoc())</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  {</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  doc = NO_MORE_DOCS;</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>  <span class="keywordflow">return</span> doc;</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div> |
| <div class="line"><a name="l00066"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html#a37e9ac83c6550779e1c71763c7826956"> 66</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> Advance(<span class="keywordtype">int</span> target)</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="keywordflow">if</span> (!more)</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="keywordflow">return</span> doc = NO_MORE_DOCS;</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>  <span class="keywordflow">if</span> (spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a51674bd6a0ad58587b30a76a6ed550ea" title="Returns the document number of the current match. Initially invalid. ">Doc</a>() < target)</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">// setFreqCurrentDoc() leaves spans.doc() ahead</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  more = spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a122cfabd2c1398c1010f35ec8232a552" title="Skips to the first match beyond the current, whose document number is greater than or equal to target...">SkipTo</a>(target);</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="keywordflow">if</span> (!SetFreqCurrentDoc())</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>  doc = NO_MORE_DOCS;</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="keywordflow">return</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>  </div> |
| <div class="line"><a name="l00084"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html#a3633c4a3910c8f11d764dea66eb3037c"> 84</a></span>  <span class="keyword">public</span> <span class="comment">/*protected internal*/</span> <span class="keyword">virtual</span> <span class="keywordtype">bool</span> SetFreqCurrentDoc()</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>  <span class="keywordflow">if</span> (!more)</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  doc = spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a51674bd6a0ad58587b30a76a6ed550ea" title="Returns the document number of the current match. Initially invalid. ">Doc</a>();</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  freq = 0.0f;</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">do</span> </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>  <span class="keywordtype">int</span> matchLength = spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a26fb994fba6afc5a5c065632631106f7" title="Returns the end position of the current match. Initially invalid. ">End</a>() - spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a29d4939a4087a07a0789c5970dc6e38e" title="Returns the start position of the current match. Initially invalid. ">Start</a>();</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  freq += <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a>.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a58d84da69da3185f4c2548d80d02fd26" title="Computes the amount of a sloppy phrase match, based on an edit distance. This value is summed for eac...">SloppyFreq</a>(matchLength);</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  more = spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#ac0b2eadf3f45f2d2df28ebb3d4ae05f9" title="Move to the next match, returning true iff any such exists. ">Next</a>();</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="keywordflow">while</span> (more && (doc == spans.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_spans.html#a51674bd6a0ad58587b30a76a6ed550ea" title="Returns the document number of the current match. Initially invalid. ">Doc</a>()));</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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>  </div> |
| <div class="line"><a name="l00102"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html#aa781fdc809539f2006392f7db9f3f075"> 102</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> DocID()</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>  <span class="keywordflow">return</span> doc;</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"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_spans_1_1_span_scorer.html#a26449ead756641b9bd9117aaa897edd2"> 107</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">float</span> Score()</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>  <span class="keywordtype">float</span> raw = <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a>.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#ab08940fe117d42b282f342a09b6beba9" title="Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied...">Tf</a>(freq) * value_Renamed; <span class="comment">// raw score</span></div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">return</span> norms == null?raw:raw * <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a>.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#acd2a4329c78ea23877a82c425fe76188" title="Decodes a normalization factor stored in an index.">DecodeNorm</a>(norms[doc]); <span class="comment">// normalize</span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">virtual</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_explanation.html" title="Expert: Describes the score computation for document and query. ">Explanation</a> Explain(<span class="keywordtype">int</span> doc)</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>  <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_explanation.html" title="Expert: Describes the score computation for document and query. ">Explanation</a> tfExplanation = <span class="keyword">new</span> <a class="code" href="_custom_score_query_8cs.html#aea5b3dcb7c8a52294feb57dcaa878033">Explanation</a>();</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="keywordtype">int</span> expDoc = Advance(doc);</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="keywordtype">float</span> phraseFreq = (expDoc == doc)?freq:0.0f;</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  tfExplanation.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_explanation.html#ae7933fa7759da03b13211cf2804c40af" title="The value assigned to this explanation node. ">Value</a> = <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a>.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#ab08940fe117d42b282f342a09b6beba9" title="Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied...">Tf</a>(phraseFreq);</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  tfExplanation.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_explanation.html#a6ea561368bd5826af73342c3fe2e5eb5" title="A description of this explanation node. ">Description</a> = <span class="stringliteral">"tf(phraseFreq="</span> + phraseFreq + <span class="stringliteral">")"</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="keywordflow">return</span> tfExplanation;</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div> |
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