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| <li class="navelem"><a class="el" href="../../dir_3a8d697be1e2feab9f01acc78e9570fb.html">contrib</a></li><li class="navelem"><a class="el" href="../../dir_5b88ab0c8cbeaf4a220fc00c661714a3.html">Queries</a></li><li class="navelem"><a class="el" href="../../dir_20b7cfd46f5815c66b6cd3848d06f4db.html">Similar</a></li> </ul> |
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| <div class="title">MoreLikeThis.cs</div> </div> |
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| <a href="../../dd/d53/_more_like_this_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> <span class="keyword">using</span> System.IO;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">using</span> System.Linq;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> Lucene.Net.Index;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">using</span> Lucene.Net.Store;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">using</span> Lucene.Net.Support;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">using</span> Lucene.Net.Util;</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a2a6914ea10bbe06764856e29e5674e66"> 26</a></span> <span class="keyword">using</span> <a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> = Lucene.Net.Index.IndexReader;</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9"> 27</a></span> <span class="keyword">using</span> <a class="code" href="../../d3/daf/class_lucene_1_1_net_1_1_index_1_1_term.html" title="A Term represents a word from text. This is the unit of search. It is composed of two elements...">Term</a> = Lucene.Net.Index.<a class="code" href="../../d3/daf/class_lucene_1_1_net_1_1_index_1_1_term.html#a8d6601bb9e6c004148076104f33d237a" title="Constructs a Term with the given field and text. Note that a null field or null text value results in...">Term</a>;</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a53e74846024ac804f694b882eea1936c"> 28</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a53e74846024ac804f694b882eea1936c">BooleanClause</a> = Lucene.Net.Search.BooleanClause;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7ad608bafa9687ad12fc944e1f4f001f"> 29</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7ad608bafa9687ad12fc944e1f4f001f">DefaultSimilarity</a> = Lucene.Net.Search.DefaultSimilarity;</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a13f0b68c1e7c8f509c3a0be1441df5d9"> 30</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a13f0b68c1e7c8f509c3a0be1441df5d9">TermQuery</a> = Lucene.Net.Search.TermQuery;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#ae2b9948961aeea34f9c4e4955536f433"> 31</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#ae2b9948961aeea34f9c4e4955536f433">BooleanQuery</a> = Lucene.Net.Search.BooleanQuery;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a507bc55818dbcde9964f629543370b6f"> 32</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a507bc55818dbcde9964f629543370b6f">IndexSearcher</a> = Lucene.Net.Search.IndexSearcher;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#accbc7c5687907350ba0e2681b41e1b0d"> 33</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#accbc7c5687907350ba0e2681b41e1b0d">Query</a> = Lucene.Net.Search.Query;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f"> 34</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f">Analyzer</a> = Lucene.Net.Analysis.Analyzer;</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a205730fc8c2839cf92051d131140dae0"> 35</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a205730fc8c2839cf92051d131140dae0">TokenStream</a> = Lucene.Net.Analysis.TokenStream;</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a95c37490d2ac2832fbd090844a6c8d23"> 36</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a95c37490d2ac2832fbd090844a6c8d23">StandardAnalyzer</a> = Lucene.Net.Analysis.Standard.StandardAnalyzer;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="../../dd/d53/_more_like_this_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd"> 37</a></span> <span class="keyword">using</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">Document</a> = Lucene.Net.Documents.Document;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">using</span> Lucene.Net.Analysis.Tokenattributes;</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div> |
| <div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="../../dd/d63/namespace_lucene_1_1_net_1_1_search_1_1_similar.html"> 40</a></span> <span class="keyword">namespace </span>Lucene.Net.Search.Similar</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {<span class="comment"></span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> /// <summary> Generate "more like this" similarity queries. </span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> /// Based on this mail:</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> /// <pre></span></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> /// Lucene does let you access the document frequency of terms, with IndexReader.DocFreq().</span></div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> /// Term frequencies can be computed by re-tokenizing the text, which, for a single document,</span></div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> /// is usually fast enough. But looking up the DocFreq() of every term in the document is</span></div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> /// probably too slow.</span></div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> /// You can use some heuristics to prune the set of terms, to avoid calling DocFreq() too much,</span></div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> /// or at all. Since you're trying to maximize a tf*idf score, you're probably most interested</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> /// in terms with a high tf. Choosing a tf threshold even as low as two or three will radically</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> /// reduce the number of terms under consideration. Another heuristic is that terms with a</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> /// high idf (i.e., a low df) tend to be longer. So you could threshold the terms by the</span></div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> /// number of characters, not selecting anything less than, e.g., six or seven characters.</span></div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> /// With these sorts of heuristics you can usually find small set of, e.g., ten or fewer terms</span></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /// that do a pretty good job of characterizing a document.</span></div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> /// It all depends on what you're trying to do. If you're trying to eek out that last percent</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> /// of precision and recall regardless of computational difficulty so that you can win a TREC</span></div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// competition, then the techniques I mention above are useless. But if you're trying to</span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> /// provide a "more like this" button on a search results page that does a decent job and has</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> /// good performance, such techniques might be useful.</span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> /// An efficient, effective "more-like-this" query generator would be a great contribution, if</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> /// anyone's interested. I'd imagine that it would take a Reader or a String (the document's</span></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> /// text), analyzer Analyzer, and return a set of representative terms using heuristics like those</span></div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> /// above. The frequency and length thresholds could be parameters, etc.</span></div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> /// Doug</span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> /// </pre></span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> /// <p/></span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> /// <h3>Initial Usage</h3></span></div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> /// This class has lots of options to try to make it efficient and flexible.</span></div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> /// See the body of <see cref="Main"/> below in the source for real code, or</span></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> /// if you want pseudo code, the simpliest possible usage is as follows. The bold</span></div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> /// fragment is specific to this class.</span></div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> /// <pre></span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> /// IndexReader ir = ...</span></div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> /// IndexSearcher is = ...</span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> /// <b></span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> /// MoreLikeThis mlt = new MoreLikeThis(ir);</span></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> /// Reader target = ... </b><em>// orig source of doc you want to find similarities to</em><b></span></div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> /// Query query = mlt.Like( target);</span></div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> /// </b></span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> /// Hits hits = is.Search(query);</span></div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /// <em>// now the usual iteration thru 'hits' - the only thing to watch for is to make sure</span></div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> /// you ignore the doc if it matches your 'target' document, as it should be similar to itself </em></span></div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> /// </pre></span></div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> /// Thus you:</span></div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> /// <ol></span></div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> /// <li> do your normal, Lucene setup for searching,</li></span></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> /// <li> create a MoreLikeThis,</li></span></div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> /// <li> get the text of the doc you want to find similaries to</li></span></div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> /// <li> then call one of the Like() calls to generate a similarity query</li></span></div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> /// <li> call the searcher to find the similar docs</li></span></div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> /// </ol></span></div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> /// <h3>More Advanced Usage</h3></span></div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> /// You may want to use <see cref="SetFieldNames"/> so you can examine</span></div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> /// multiple fields (e.g. body and title) for similarity.</span></div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> /// <p/></span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> /// Depending on the size of your index and the size and makeup of your documents you</span></div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> /// may want to call the other set methods to control how the similarity queries are</span></div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> /// generated:</span></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> /// <ul></span></div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> /// <li> <see cref="MinTermFreq"/> </li></span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> /// <li> <see cref="MinDocFreq"/> </li></span></div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> /// <li> <see cref="MaxDocFreq"/></li></span></div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> /// <li> <see cref="SetMaxDocFreqPct(int)"/></li></span></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> /// <li> <see cref="MinWordLen"/> </li></span></div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> /// <li> <see cref="MaxWordLen"/></li></span></div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> /// <li> <see cref="MaxQueryTerms"/></li></span></div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> /// <li> <see cref="MaxNumTokensParsed"/></li></span></div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> /// <li> <see cref="SetStopWords(ISet{string})"/> </li></span></div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> /// </ul> </span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> /// <hr/></span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> /// <pre></span></div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> /// Changes: Mark Harwood 29/02/04</span></div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> /// Some bugfixing, some refactoring, some optimisation.</span></div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> /// - bugfix: retrieveTerms(int docNum) was not working for indexes without a termvector -added missing code</span></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> /// - bugfix: No significant terms being created for fields with a termvector - because </span></div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> /// was only counting one occurence per term/field pair in calculations(ie not including frequency info from TermVector) </span></div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> /// - refactor: moved common code into isNoiseWord()</span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> /// - optimise: when no termvector support available - used maxNumTermsParsed to limit amount of tokenization</span></div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> /// </pre></span></div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00138"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html"> 138</a></span> <span class="comment"></span> <span class="keyword">public</span> sealed <span class="keyword">class </span><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html" title="Generate "more like this" similarity queries. Based on this mail:">MoreLikeThis</a></div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</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"> /// <summary> Default maximum number of tokens to parse in each example doc field that is not stored with TermVector support.</summary></span></div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> /// <seealso cref="MaxNumTokensParsed"></span></div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ac1949c8c1e8afbc543b248b8f97476bb"> 144</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MAX_NUM_TOKENS_PARSED = 5000;</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"></span></div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> /// <summary> Default analyzer to parse source doc with.</summary></span></div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> /// <seealso cref="Analyzer"></span></div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00150"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a4d5ea4426b25bd123d874022ef3c6d36"> 150</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">static</span> readonly <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f">Analyzer</a> DEFAULT_ANALYZER = <span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a95c37490d2ac2832fbd090844a6c8d23">StandardAnalyzer</a>(Util.Version.LUCENE_CURRENT);</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"> /// <summary> Ignore terms with less than this frequency in the source doc.</summary></span></div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> /// <seealso cref="MinTermFreq"></span></div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> /// <seealso cref="MinTermFreq"></span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00157"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a730dd62cd19edfecedd47ae2ebb5076a"> 157</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MIN_TERM_FREQ = 2;</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> /// <summary> Ignore words which do not occur in at least this many docs.</summary></span></div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> /// <seealso cref="MinDocFreq"></span></div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> /// <seealso cref="MinDocFreq"></span></div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00164"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#afb4c15e7a2cf7aa0e13da83d95d6298c"> 164</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MIN_DOC_FREQ = 5;</div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> /// Ignore words wich occur in more than this many docs</span></div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> /// <seealso cref="MaxDocFreq"/></span></div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> /// <seealso cref="MaxDocFreq"/></span></div> |
| <div class="line"><a name="l00171"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ad59f2a01524b21154f707dcbeb2a7aa1"> 171</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MAX_DOC_FREQ = <span class="keywordtype">int</span>.MaxValue;</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> /// <summary> Boost terms in query based on score.</summary></span></div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> /// <seealso cref="Boost"></span></div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> /// <seealso cref="Boost"></span></div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00178"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a1a29c10967219376dcb6cec7e5b107be"> 178</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> DEFAULT_BOOST = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> /// <summary> Default field names. Null is used to specify that the field names should be looked</span></div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> /// up at runtime from the provided reader.</span></div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00183"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#aadbdcec74b7a82432f64584795ff83a4"> 183</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">static</span> readonly System.String[] DEFAULT_FIELD_NAMES = <span class="keyword">new</span> System.String[] { <span class="stringliteral">"contents"</span> };</div> |
| <div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> /// <summary> Ignore words less than this length or if 0 then this has no effect.</summary></span></div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> /// <seealso cref="MinWordLen"></span></div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> /// <seealso cref="MinWordLen"></span></div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00190"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a2e1a9b979fa9ce1eaebd94019b22c5eb"> 190</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MIN_WORD_LENGTH = 0;</div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> /// <summary> Ignore words greater than this length or if 0 then this has no effect.</summary></span></div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> /// <seealso cref="MaxWordLen"></span></div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> /// <seealso cref="MaxWordLen"></span></div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00197"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a76f82404cc474ff58d1e3b07e1750569"> 197</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MAX_WORD_LENGTH = 0;</div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> /// <summary> Default set of stopwords.</span></div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> /// If null means to allow stop words.</span></div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> /// <seealso cref="SetStopWords"></span></div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"> /// <seealso cref="GetStopWords"></span></div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00207"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a0fe76aa5a10219b60b588f1c4c1e4a36"> 207</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">static</span> readonly ISet<string> DEFAULT_STOP_WORDS = null;</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> /// <summary> Current set of stop words.</summary></span></div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"></span> <span class="keyword">private</span> ISet<string> stopWords = DEFAULT_STOP_WORDS;</div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> /// <summary> Return a Query with no more than this many terms.</span></div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment"> /// <seealso cref="BooleanQuery.MaxClauseCount"></span></div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"> /// <seealso cref="MaxQueryTerms"></span></div> |
| <div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> /// <seealso cref="MaxQueryTerms"></span></div> |
| <div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00221"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a2c328c933818ccdca3733bc0642e45cd"> 221</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_MAX_QUERY_TERMS = 25;</div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> /// <summary> Analyzer that will be used to parse the doc.</summary></span></div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"></span> <span class="keyword">private</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f">Analyzer</a> analyzer = DEFAULT_ANALYZER;</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> /// <summary> Ignore words less freqent that this.</summary></span></div> |
| <div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> minTermFreq = DEFAULT_MIN_TERM_FREQ;</div> |
| <div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> /// <summary> Ignore words which do not occur in at least this many docs.</summary></span></div> |
| <div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> minDocFreq = DEFAULT_MIN_DOC_FREQ;</div> |
| <div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> /// Ignore words which occur in more than this many docs.</span></div> |
| <div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> maxDocfreq = DEFAULT_MAX_DOC_FREQ;</div> |
| <div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> /// <summary> Should we apply a boost to the Query based on the scores?</summary></span></div> |
| <div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">bool</span> boost = DEFAULT_BOOST;</div> |
| <div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment"> /// <summary> Field name we'll analyze.</summary></span></div> |
| <div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"></span> <span class="keyword">private</span> System.String[] fieldNames = DEFAULT_FIELD_NAMES;</div> |
| <div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"> /// <summary> The maximum number of tokens to parse in each example doc field that is not stored with TermVector support</summary></span></div> |
| <div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> maxNumTokensParsed = DEFAULT_MAX_NUM_TOKENS_PARSED;</div> |
| <div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> /// <summary> Ignore words if less than this len.</summary></span></div> |
| <div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> minWordLen = DEFAULT_MIN_WORD_LENGTH;</div> |
| <div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> /// <summary> Ignore words if greater than this len.</summary></span></div> |
| <div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> maxWordLen = DEFAULT_MAX_WORD_LENGTH;</div> |
| <div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> /// <summary> Don't return a query longer than this.</summary></span></div> |
| <div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">int</span> maxQueryTerms = DEFAULT_MAX_QUERY_TERMS;</div> |
| <div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment"> /// <summary> For idf() calculations.</summary></span></div> |
| <div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"></span> <span class="keyword">private</span> Lucene.Net.Search.Similarity similarity = null;</div> |
| <div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> /// <summary> IndexReader to use</summary></span></div> |
| <div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment"></span> <span class="keyword">private</span> <a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> ir;</div> |
| <div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment"> /// <summary> Boost factor to use when boosting the terms </summary></span></div> |
| <div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">float</span> boostFactor = 1;</div> |
| <div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> /// Gets or sets the boost factor used when boosting terms</span></div> |
| <div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">float</span> BoostFactor</div> |
| <div class="line"><a name="l00268"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#abc185edd35e3647a8067d029ea6d4663"> 268</a></span>  {</div> |
| <div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> boostFactor; }</div> |
| <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keyword">set</span> { this.boostFactor = value; }</div> |
| <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  }</div> |
| <div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment"> /// <summary> Constructor requiring an IndexReader.</summary></span></div> |
| <div class="line"><a name="l00274"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ade9e667d468f30ba63449aa545dfdcd2"> 274</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html" title="Generate "more like this" similarity queries. Based on this mail:">MoreLikeThis</a>(<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> ir) : this(ir,new <a class="code" href="../../d6/d95/class_lucene_1_1_net_1_1_search_1_1_default_similarity.html" title="Expert: Default scoring implementation. ">DefaultSimilarity</a>())</div> |
| <div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  {</div> |
| <div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div> |
| <div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div> |
| <div class="line"><a name="l00278"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a33b9ea6e0dc34f0a659b91a134181f0e"> 278</a></span>  <span class="keyword">public</span> <a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html" title="Generate "more like this" similarity queries. Based on this mail:">MoreLikeThis</a>(<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> ir, Lucene.Net.Search.Similarity sim)</div> |
| <div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  {</div> |
| <div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  this.ir = ir;</div> |
| <div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  this.similarity = sim;</div> |
| <div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div> |
| <div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div> |
| <div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keyword">public</span> <a class="code" href="../../df/dc2/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="../../df/dc2/class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a></div> |
| <div class="line"><a name="l00285"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a452e7c398ceb7223abd30d76f74413dd"> 285</a></span>  {</div> |
| <div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> similarity; }</div> |
| <div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">set</span> { this.similarity = value; }</div> |
| <div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</div> |
| <div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment"> /// <summary> Gets or sets the analyzer used to parse source doc with. The default analyzer</span></div> |
| <div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment"> /// is the <see cref="DEFAULT_ANALYZER"/>.</span></div> |
| <div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment"> /// <para /></span></div> |
| <div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment"> /// An analyzer is not required for generating a query with the</span></div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment"> /// <see cref="Like(int)"/> method, all other 'like' methods require an analyzer.</span></div> |
| <div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"> /// <value> the analyzer that will be used to parse source doc with. </value></span></div> |
| <div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment"> /// <seealso cref="DEFAULT_ANALYZER"></span></div> |
| <div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f">Analyzer</a> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a7f807a855319cb4e1efa0e1fcd2a537f">Analyzer</a></div> |
| <div class="line"><a name="l00300"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#af345b016d0ffa3bb562e6f8ec2fbd4b7"> 300</a></span>  {</div> |
| <div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> analyzer; }</div> |
| <div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">set</span> { this.analyzer = value; }</div> |
| <div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  }</div> |
| <div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"> /// Gets or sets the frequency below which terms will be ignored in the source doc. The default</span></div> |
| <div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment"> /// frequency is the <see cref="DEFAULT_MIN_TERM_FREQ"/>.</span></div> |
| <div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MinTermFreq</div> |
| <div class="line"><a name="l00310"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ade0a1363b76e46295be5c1dc7b4b9e3a"> 310</a></span>  {</div> |
| <div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> minTermFreq; }</div> |
| <div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keyword">set</span> { this.minTermFreq = value; }</div> |
| <div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div> |
| <div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> /// Gets or sets the frequency at which words will be ignored which do not occur in at least this</span></div> |
| <div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> /// many docs. The default frequency is <see cref="DEFAULT_MIN_DOC_FREQ"/>.</span></div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MinDocFreq</div> |
| <div class="line"><a name="l00320"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a22fbf09750327ac200b634e6603eb87f"> 320</a></span>  {</div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> minDocFreq; }</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keyword">set</span> { this.minDocFreq = value; }</div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div> |
| <div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment"> /// Gets or sets the maximum frequency in which words may still appear. </span></div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> /// Words that appear in more than this many docs will be ignored. The default frequency is </span></div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> /// <see cref="DEFAULT_MAX_DOC_FREQ"/></span></div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MaxDocFreq</div> |
| <div class="line"><a name="l00331"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a0dfc9b91314b0eb171d2e1a4abba0a31"> 331</a></span>  {</div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> this.maxDocfreq; }</div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keyword">set</span> { this.maxDocfreq = value; }</div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"> /// Set the maximum percentage in which words may still appear. Words that appear</span></div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"> /// in more than this many percent of all docs will be ignored.</span></div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment"> /// <param name="maxPercentage"></span></div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> /// the maximum percentage of documents (0-100) that a term may appear </span></div> |
| <div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment"> /// in to be still considered relevant</span></div> |
| <div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00344"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a41e829f9c2eff5479363d1a7bf460754"> 344</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">void</span> SetMaxDocFreqPct(<span class="keywordtype">int</span> maxPercentage)</div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  {</div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  this.maxDocfreq = maxPercentage * ir.NumDocs() / 100;</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"> /// <summary> Gets or sets a boolean indicating whether to boost terms in query based </span></div> |
| <div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> /// on "score" or not. The default is <see cref="DEFAULT_BOOST"/>.</span></div> |
| <div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">bool</span> Boost</div> |
| <div class="line"><a name="l00353"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#af2f8ce7bb5d502c7e496075297ea87fe"> 353</a></span>  {</div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> boost; }</div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keyword">set</span> { this.boost = value; }</div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  }</div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> /// <summary> Returns the field names that will be used when generating the 'More Like This' query.</span></div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment"> /// The default field names that will be used is <see cref="DEFAULT_FIELD_NAMES"/>.</span></div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"> /// <returns> the field names that will be used when generating the 'More Like This' query.</span></div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00364"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a5fcb128a8b143a9015fb11996cf0e874"> 364</a></span> <span class="comment"></span> <span class="keyword">public</span> System.String[] GetFieldNames()</div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  {</div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">return</span> fieldNames;</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  }</div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment"> /// <summary> Sets the field names that will be used when generating the 'More Like This' query.</span></div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment"> /// Set this to null for the field names to be determined at runtime from the IndexReader</span></div> |
| <div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment"> /// provided in the constructor.</span></div> |
| <div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment"> /// <param name="fieldNames">the field names that will be used when generating the 'More Like This'</span></div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment"> /// query.</span></div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00377"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#acd9239078fd53f28aeee0384614f5bac"> 377</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">void</span> SetFieldNames(System.String[] fieldNames)</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  {</div> |
| <div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  this.fieldNames = fieldNames;</div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div> |
| <div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment"> /// Gets or sets the minimum word length below which words will be ignored. </span></div> |
| <div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment"> /// Set this to 0 for no minimum word length. The default is <see cref="DEFAULT_MIN_WORD_LENGTH"/>.</span></div> |
| <div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MinWordLen</div> |
| <div class="line"><a name="l00387"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a8ad811cd0d9c44fa8308c6fdffa04378"> 387</a></span>  {</div> |
| <div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> minWordLen; }</div> |
| <div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keyword">set</span> { this.minWordLen = value; }</div> |
| <div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> /// Gets or sets the maximum word length above which words will be ignored. Set this to 0 for no</span></div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment"> /// maximum word length. The default is <see cref="DEFAULT_MAX_WORD_LENGTH"/>.</span></div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MaxWordLen</div> |
| <div class="line"><a name="l00397"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a45ae63c3b6f59ad8000b027f264ab97c"> 397</a></span>  {</div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> maxWordLen; }</div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keyword">set</span> { this.maxWordLen = value; }</div> |
| <div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  }</div> |
| <div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment"> /// <summary> Set the set of stopwords.</span></div> |
| <div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment"> /// Any word in this set is considered "uninteresting" and ignored.</span></div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment"> /// Even if your Analyzer allows stopwords, you might want to tell the MoreLikeThis code to ignore them, as</span></div> |
| <div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment"> /// for the purposes of document similarity it seems reasonable to assume that "a stop word is never interesting".</span></div> |
| <div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"> /// <param name="stopWords">set of stopwords, if null it means to allow stop words</span></div> |
| <div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment"> /// <seealso cref="Lucene.Net.Analysis.StopFilter.MakeStopSet(string[])"></span></div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment"> /// <seealso cref="GetStopWords"></span></div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00415"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a6ad2b31d0990258ee59a0096fd1986d0"> 415</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">void</span> SetStopWords(ISet<string> stopWords)</div> |
| <div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  {</div> |
| <div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  this.stopWords = stopWords;</div> |
| <div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div> |
| <div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment"> /// <summary> Get the current stop words being used.</summary></span></div> |
| <div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> /// <seealso cref="SetStopWords"></span></div> |
| <div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00423"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ad8743b81b0b5bc642c0608c455351d5e"> 423</a></span> <span class="comment"></span> <span class="keyword">public</span> ISet<string> GetStopWords()</div> |
| <div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  {</div> |
| <div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">return</span> stopWords;</div> |
| <div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  }</div> |
| <div class="line"><a name="l00427"></a><span class="lineno"> 427</span> </div> |
| <div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00430"></a><span class="lineno"> 430</span> <span class="comment"> /// Gets or sets the maximum number of query terms that will be included in any generated query.</span></div> |
| <div class="line"><a name="l00431"></a><span class="lineno"> 431</span> <span class="comment"> /// The default is <see cref="DEFAULT_MAX_QUERY_TERMS"/>.</span></div> |
| <div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MaxQueryTerms</div> |
| <div class="line"><a name="l00434"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ab213de904f424a356878274a0c99fea6"> 434</a></span>  {</div> |
| <div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> maxQueryTerms; }</div> |
| <div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keyword">set</span> { this.maxQueryTerms = value; }</div> |
| <div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div> |
| <div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> /// <summary></span></div> |
| <div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> /// Gets or sets the maximum number of tokens to parse in each example doc</span></div> |
| <div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment"> /// field that is not stored with TermVector support</span></div> |
| <div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment"> /// <seealso cref="DEFAULT_MAX_NUM_TOKENS_PARSED" /></span></div> |
| <div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keywordtype">int</span> MaxNumTokensParsed</div> |
| <div class="line"><a name="l00445"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a34be8cfcff4168d5ffbc1f3347959f0e"> 445</a></span>  {</div> |
| <div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> maxNumTokensParsed; }</div> |
| <div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keyword">set</span> { maxNumTokensParsed = value; }</div> |
| <div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div> |
| <div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"> /// <summary>Return a query that will return docs like the passed lucene document ID.</summary></span></div> |
| <div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment"> /// <param name="docNum">the documentID of the lucene doc to generate the 'More Like This" query for.</param></span></div> |
| <div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"> /// <returns> a query that will return docs like the passed lucene document ID.</returns></span></div> |
| <div class="line"><a name="l00453"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a1f2e0341982b35088a6de9765e232dba"> 453</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> Like(<span class="keywordtype">int</span> docNum)</div> |
| <div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  {</div> |
| <div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (fieldNames == null)</div> |
| <div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  {</div> |
| <div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="comment">// gather list of valid fields from lucene</span></div> |
| <div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  ICollection<string> fields = ir.GetFieldNames(<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a>.FieldOption.INDEXED);</div> |
| <div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  fieldNames = fields.ToArray();</div> |
| <div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  }</div> |
| <div class="line"><a name="l00461"></a><span class="lineno"> 461</span> </div> |
| <div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordflow">return</span> CreateQuery(RetrieveTerms(docNum));</div> |
| <div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  }</div> |
| <div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment"> /// <summary> Return a query that will return docs like the passed file.</span></div> |
| <div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="comment"> /// <returns> a query that will return docs like the passed file.</span></div> |
| <div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00470"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a617a370d5a6db91ce545353540fcd577"> 470</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> Like(System.IO.FileInfo f)</div> |
| <div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  {</div> |
| <div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">if</span> (fieldNames == null)</div> |
| <div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  {</div> |
| <div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="comment">// gather list of valid fields from lucene</span></div> |
| <div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  ICollection<string> fields = ir.GetFieldNames(<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a>.FieldOption.INDEXED);</div> |
| <div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  fieldNames = fields.ToArray();</div> |
| <div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  }</div> |
| <div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div> |
| <div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">return</span> Like(<span class="keyword">new</span> System.IO.StreamReader(f.FullName, System.Text.Encoding.Default));</div> |
| <div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  }</div> |
| <div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="comment"> /// <summary> Return a query that will return docs like the passed URL.</span></div> |
| <div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment"> /// <returns> a query that will return docs like the passed URL.</span></div> |
| <div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00487"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a2317f208f51c7ed38a5d85117e498c9f"> 487</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> Like(System.Uri u)</div> |
| <div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  {</div> |
| <div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">return</span> Like(<span class="keyword">new</span> System.IO.StreamReader((System.Net.WebRequest.Create(u)).GetResponse().GetResponseStream(), System.Text.Encoding.Default));</div> |
| <div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  }</div> |
| <div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"> /// <summary> Return a query that will return docs like the passed stream.</span></div> |
| <div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment"> /// <returns> a query that will return docs like the passed stream.</span></div> |
| <div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00497"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ad18b79b83980de5b652a10c3e5d9ba38"> 497</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> Like(System.IO.Stream is_Renamed)</div> |
| <div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  {</div> |
| <div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">return</span> Like(<span class="keyword">new</span> System.IO.StreamReader(is_Renamed, System.Text.Encoding.Default));</div> |
| <div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  }</div> |
| <div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment"> /// <summary> Return a query that will return docs like the passed Reader.</span></div> |
| <div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment"> /// <returns> a query that will return docs like the passed Reader.</span></div> |
| <div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00507"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ad4e7a170a934d04c482359c4dbedfb7a"> 507</a></span> <span class="comment"></span> <span class="keyword">public</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> Like(System.IO.TextReader r)</div> |
| <div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  {</div> |
| <div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordflow">return</span> CreateQuery(RetrieveTerms(r));</div> |
| <div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  }</div> |
| <div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment"> /// <summary> Create the More like query from a PriorityQueue</summary></span></div> |
| <div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"></span> <span class="keyword">private</span> <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> CreateQuery(<a class="code" href="../../d3/d14/namespace_spell_checker_1_1_net_1_1_search_1_1_spell.html#a050da50134c60f7d9891255871a07fc1">PriorityQueue</a><<span class="keywordtype">object</span>[]> q)</div> |
| <div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  {</div> |
| <div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <a class="code" href="../../d8/d7c/class_lucene_1_1_net_1_1_search_1_1_boolean_query.html" title="A Query that matches documents matching boolean combinations of other queries, e.g. TermQuerys, PhraseQuerys or other BooleanQuerys. ">BooleanQuery</a> query = <span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#ae2b9948961aeea34f9c4e4955536f433">BooleanQuery</a>();</div> |
| <div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  System.Object cur;</div> |
| <div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordtype">int</span> qterms = 0;</div> |
| <div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keywordtype">float</span> bestScore = 0;</div> |
| <div class="line"><a name="l00519"></a><span class="lineno"> 519</span> </div> |
| <div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keywordflow">while</span> (((cur = q.Pop()) != null))</div> |
| <div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  {</div> |
| <div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  System.Object[] ar = (System.Object[])cur;</div> |
| <div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <a class="code" href="../../da/d32/class_lucene_1_1_net_1_1_search_1_1_term_query.html" title="A Query that matches documents containing a term. This may be combined with other terms with a Boolea...">TermQuery</a> tq = <span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a13f0b68c1e7c8f509c3a0be1441df5d9">TermQuery</a>(<span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a>((System.String)ar[1], (System.String)ar[0]));</div> |
| <div class="line"><a name="l00524"></a><span class="lineno"> 524</span> </div> |
| <div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keywordflow">if</span> (boost)</div> |
| <div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  {</div> |
| <div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">if</span> (qterms == 0)</div> |
| <div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  {</div> |
| <div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  bestScore = (float)ar[2];</div> |
| <div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div> |
| <div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keywordtype">float</span> myScore = (float)ar[2];</div> |
| <div class="line"><a name="l00532"></a><span class="lineno"> 532</span> </div> |
| <div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  tq.<a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html#a2a58b600e864bed65cc21815fffa0218" title="Gets or sets the boost for this query clause to b. Documents matching this clause will (in addition t...">Boost</a> = boostFactor * myScore / bestScore;</div> |
| <div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  }</div> |
| <div class="line"><a name="l00535"></a><span class="lineno"> 535</span> </div> |
| <div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keywordflow">try</span></div> |
| <div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  {</div> |
| <div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  query.<a class="code" href="../../d8/d7c/class_lucene_1_1_net_1_1_search_1_1_boolean_query.html#abb13cef2c294c50e9224afd45239bfb5" title="Adds a clause to a boolean query.">Add</a>(tq, <a class="code" href="../../d4/dbc/_boolean_query_8cs.html#a465cf9485f9f5eca4050230ebdbb8ed4">Occur</a>.SHOULD);</div> |
| <div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  }</div> |
| <div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">catch</span> (<a class="code" href="../../dd/d53/_more_like_this_8cs.html#ae2b9948961aeea34f9c4e4955536f433">BooleanQuery</a>.TooManyClauses ignore)</div> |
| <div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  {</div> |
| <div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  }</div> |
| <div class="line"><a name="l00544"></a><span class="lineno"> 544</span> </div> |
| <div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  qterms++;</div> |
| <div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">if</span> (maxQueryTerms > 0 && qterms >= maxQueryTerms)</div> |
| <div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  {</div> |
| <div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  }</div> |
| <div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  }</div> |
| <div class="line"><a name="l00551"></a><span class="lineno"> 551</span> </div> |
| <div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">return</span> query;</div> |
| <div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  }</div> |
| <div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment"> /// <summary> Create a PriorityQueue from a word->tf map.</span></div> |
| <div class="line"><a name="l00556"></a><span class="lineno"> 556</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment"> /// <param name="words">a map of words keyed on the word(String) with Int objects as the values.</span></div> |
| <div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"></span> <span class="keyword">private</span> PriorityQueue<object[]> CreateQueue(IDictionary<string,Int> words)</div> |
| <div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  {</div> |
| <div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="comment">// have collected all words in doc and their freqs</span></div> |
| <div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <span class="keywordtype">int</span> numDocs = ir.NumDocs();</div> |
| <div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  FreqQ res = <span class="keyword">new</span> FreqQ(words.Count); <span class="comment">// will order words by score</span></div> |
| <div class="line"><a name="l00565"></a><span class="lineno"> 565</span> </div> |
| <div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  var it = words.Keys.GetEnumerator();</div> |
| <div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="keywordflow">while</span> (it.MoveNext())</div> |
| <div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  {</div> |
| <div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <span class="comment">// for every word</span></div> |
| <div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  System.String word = it.Current;</div> |
| <div class="line"><a name="l00571"></a><span class="lineno"> 571</span> </div> |
| <div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keywordtype">int</span> tf = words[word].x; <span class="comment">// term freq in the source doc</span></div> |
| <div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordflow">if</span> (minTermFreq > 0 && tf < minTermFreq)</div> |
| <div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  {</div> |
| <div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">continue</span>; <span class="comment">// filter out words that don't occur enough times in the source</span></div> |
| <div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  }</div> |
| <div class="line"><a name="l00577"></a><span class="lineno"> 577</span> </div> |
| <div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="comment">// go through all the fields and find the largest document frequency</span></div> |
| <div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  System.String topField = fieldNames[0];</div> |
| <div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordtype">int</span> docFreq = 0;</div> |
| <div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < fieldNames.Length; i++)</div> |
| <div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  {</div> |
| <div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordtype">int</span> freq = ir.DocFreq(<span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a>(fieldNames[i], word));</div> |
| <div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  topField = (freq > docFreq) ? fieldNames[i] : topField;</div> |
| <div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  docFreq = (freq > docFreq) ? freq : docFreq;</div> |
| <div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  }</div> |
| <div class="line"><a name="l00587"></a><span class="lineno"> 587</span> </div> |
| <div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">if</span> (minDocFreq > 0 && docFreq < minDocFreq)</div> |
| <div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  {</div> |
| <div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">continue</span>; <span class="comment">// filter out words that don't occur in enough docs</span></div> |
| <div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  }</div> |
| <div class="line"><a name="l00592"></a><span class="lineno"> 592</span> </div> |
| <div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keywordflow">if</span> (docFreq > maxDocfreq)</div> |
| <div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  {</div> |
| <div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keywordflow">continue</span>; <span class="comment">// filter out words that occur in too many docs</span></div> |
| <div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  }</div> |
| <div class="line"><a name="l00597"></a><span class="lineno"> 597</span> </div> |
| <div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <span class="keywordflow">if</span> (docFreq == 0)</div> |
| <div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  {</div> |
| <div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keywordflow">continue</span>; <span class="comment">// index update problem?</span></div> |
| <div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  }</div> |
| <div class="line"><a name="l00602"></a><span class="lineno"> 602</span> </div> |
| <div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordtype">float</span> idf = similarity.Idf(docFreq, numDocs);</div> |
| <div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <span class="keywordtype">float</span> score = tf * idf;</div> |
| <div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div> |
| <div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="comment">// only really need 1st 3 entries, other ones are for troubleshooting</span></div> |
| <div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  res.InsertWithOverflow(<span class="keyword">new</span> System.Object[] { word, topField, score, idf, docFreq, tf });</div> |
| <div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  }</div> |
| <div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keywordflow">return</span> res;</div> |
| <div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  }</div> |
| <div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00612"></a><span class="lineno"> 612</span> <span class="comment"> /// <summary> Describe the parameters that control how the "more like this" query is formed.</summary></span></div> |
| <div class="line"><a name="l00613"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ae6d047e909592b8c4917b001e822a9c3"> 613</a></span> <span class="comment"></span> <span class="keyword">public</span> System.String DescribeParams()</div> |
| <div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  {</div> |
| <div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  System.Text.StringBuilder sb = <span class="keyword">new</span> System.Text.StringBuilder();</div> |
| <div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"maxQueryTerms : "</span> + maxQueryTerms + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"minWordLen : "</span> + minWordLen + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"maxWordLen : "</span> + maxWordLen + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"fieldNames : \""</span>);</div> |
| <div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  System.String delim = <span class="stringliteral">""</span>;</div> |
| <div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < fieldNames.Length; i++)</div> |
| <div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  {</div> |
| <div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  System.String fieldName = fieldNames[i];</div> |
| <div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  sb.Append(delim).Append(fieldName);</div> |
| <div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  delim = <span class="stringliteral">", "</span>;</div> |
| <div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  }</div> |
| <div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  sb.Append(<span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"boost : "</span> + boost + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"minTermFreq : "</span> + minTermFreq + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  sb.Append(<span class="stringliteral">"\t"</span> + <span class="stringliteral">"minDocFreq : "</span> + minDocFreq + <span class="stringliteral">"\n"</span>);</div> |
| <div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="keywordflow">return</span> sb.ToString();</div> |
| <div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  }</div> |
| <div class="line"><a name="l00633"></a><span class="lineno"> 633</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00634"></a><span class="lineno"> 634</span> <span class="comment"> /// <summary> Test driver.</span></div> |
| <div class="line"><a name="l00635"></a><span class="lineno"> 635</span> <span class="comment"> /// Pass in "-i INDEX" and then either "-fn FILE" or "-url URL".</span></div> |
| <div class="line"><a name="l00636"></a><span class="lineno"> 636</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00637"></a><span class="lineno"> 637</span> <span class="comment"></span> [STAThread]</div> |
| <div class="line"><a name="l00638"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ae37c6e614772f48cd4b75d8729668781"> 638</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">void</span> Main(System.String[] a)</div> |
| <div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  {</div> |
| <div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  System.String indexName = <span class="stringliteral">"localhost_index"</span>;</div> |
| <div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  System.String fn = <span class="stringliteral">"c:/Program Files/Apache Group/Apache/htdocs/manual/vhosts/index.html.en"</span>;</div> |
| <div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  System.Uri url = null;</div> |
| <div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < a.Length; i++)</div> |
| <div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  {</div> |
| <div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordflow">if</span> (a[i].Equals(<span class="stringliteral">"-i"</span>))</div> |
| <div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  {</div> |
| <div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  indexName = a[++i];</div> |
| <div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  }</div> |
| <div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (a[i].Equals(<span class="stringliteral">"-f"</span>))</div> |
| <div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  {</div> |
| <div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  fn = a[++i];</div> |
| <div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  }</div> |
| <div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (a[i].Equals(<span class="stringliteral">"-url"</span>))</div> |
| <div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  {</div> |
| <div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  url = <span class="keyword">new</span> System.Uri(a[++i]);</div> |
| <div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  }</div> |
| <div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  }</div> |
| <div class="line"><a name="l00658"></a><span class="lineno"> 658</span> </div> |
| <div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  System.IO.StreamWriter temp_writer;</div> |
| <div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  temp_writer = <span class="keyword">new</span> System.IO.StreamWriter(System.Console.OpenStandardOutput(), System.Console.Out.Encoding);</div> |
| <div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  temp_writer.AutoFlush = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  System.IO.StreamWriter o = temp_writer;</div> |
| <div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <a class="code" href="../../d7/d0e/class_lucene_1_1_net_1_1_store_1_1_f_s_directory.html" title=" Base class for Directory implementations that store index files in the file system. There are currently three core subclasses:">FSDirectory</a> dir = <a class="code" href="../../d7/d0e/class_lucene_1_1_net_1_1_store_1_1_f_s_directory.html" title=" Base class for Directory implementations that store index files in the file system. There are currently three core subclasses:">FSDirectory</a>.<a class="code" href="../../d7/d0e/class_lucene_1_1_net_1_1_store_1_1_f_s_directory.html#a33ea2927779ca535c4cb90ea0dc76cfa" title="Creates an FSDirectory instance, trying to pick the best implementation given the current environment...">Open</a>(<span class="keyword">new</span> DirectoryInfo(indexName));</div> |
| <div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> r = <a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a>.<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html#ad51f1feca975e447b6486d01ed24e1ea" title="Returns an IndexReader reading the index in the given Directory. You should pass readOnly=true, since it gives much better concurrent performance, unless you intend to do write operations (delete documents or change norms) with the reader. ">Open</a>(dir, <span class="keyword">true</span>);</div> |
| <div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  o.WriteLine(<span class="stringliteral">"Open index "</span> + indexName + <span class="stringliteral">" which has "</span> + r.<a class="code" href="../../d6/d27/class_lucene_1_1_net_1_1_index_1_1_index_reader.html#a300ecbc61b021d9ae600e1b00c61a851" title="Returns the number of documents in this index. ">NumDocs</a>() + <span class="stringliteral">" docs"</span>);</div> |
| <div class="line"><a name="l00666"></a><span class="lineno"> 666</span> </div> |
| <div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html" title="Generate "more like this" similarity queries. Based on this mail:">MoreLikeThis</a> mlt = <span class="keyword">new</span> <a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html" title="Generate "more like this" similarity queries. Based on this mail:">MoreLikeThis</a>(r);</div> |
| <div class="line"><a name="l00668"></a><span class="lineno"> 668</span> </div> |
| <div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  o.WriteLine(<span class="stringliteral">"Query generation parameters:"</span>);</div> |
| <div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  o.WriteLine(mlt.<a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ae6d047e909592b8c4917b001e822a9c3" title="Describe the parameters that control how the "more like this" query is formed.">DescribeParams</a>());</div> |
| <div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  o.WriteLine();</div> |
| <div class="line"><a name="l00672"></a><span class="lineno"> 672</span> </div> |
| <div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <a class="code" href="../../de/db5/class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> query = null;</div> |
| <div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keywordflow">if</span> (url != null)</div> |
| <div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  {</div> |
| <div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  o.WriteLine(<span class="stringliteral">"Parsing URL: "</span> + url);</div> |
| <div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  query = mlt.<a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a1f2e0341982b35088a6de9765e232dba" title="Return a query that will return docs like the passed lucene document ID.">Like</a>(url);</div> |
| <div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  }</div> |
| <div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (fn != null)</div> |
| <div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  {</div> |
| <div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  o.WriteLine(<span class="stringliteral">"Parsing file: "</span> + fn);</div> |
| <div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  query = mlt.<a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a1f2e0341982b35088a6de9765e232dba" title="Return a query that will return docs like the passed lucene document ID.">Like</a>(<span class="keyword">new</span> System.IO.FileInfo(fn));</div> |
| <div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  }</div> |
| <div class="line"><a name="l00684"></a><span class="lineno"> 684</span> </div> |
| <div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  o.WriteLine(<span class="stringliteral">"q: "</span> + query);</div> |
| <div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  o.WriteLine();</div> |
| <div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <a class="code" href="../../df/dbe/class_lucene_1_1_net_1_1_search_1_1_index_searcher.html" title="Implements search over a single IndexReader.">IndexSearcher</a> searcher = <span class="keyword">new</span> <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a507bc55818dbcde9964f629543370b6f">IndexSearcher</a>(dir, <span class="keyword">true</span>);</div> |
| <div class="line"><a name="l00688"></a><span class="lineno"> 688</span> </div> |
| <div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <a class="code" href="../../d6/d30/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> hits = searcher.<a class="code" href="../../df/dbe/class_lucene_1_1_net_1_1_search_1_1_index_searcher.html#abf7c93a75b6328ce85bb40ef1146e86d" title="Expert: Low-level search implementation. Finds the top n hits for query, applying filter if non-null...">Search</a>(query, null, 25);</div> |
| <div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keywordtype">int</span> len = hits.<a class="code" href="../../d6/d30/class_lucene_1_1_net_1_1_search_1_1_top_docs.html#aba287c6fbd4cb6c821b284cfe4e38a44" title="The total number of hits for the query.">TotalHits</a>;</div> |
| <div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  o.WriteLine(<span class="stringliteral">"found: "</span> + len + <span class="stringliteral">" documents matching"</span>);</div> |
| <div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  o.WriteLine();</div> |
| <div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <a class="code" href="../../d0/ded/class_lucene_1_1_net_1_1_search_1_1_score_doc.html" title="Expert: Returned by low-level search implementations.">ScoreDoc</a>[] scoreDocs = hits.<a class="code" href="../../d6/d30/class_lucene_1_1_net_1_1_search_1_1_top_docs.html#a8feb2dcca2a99b29432ca59e4135c36c" title="The top hits for the query. ">ScoreDocs</a>;</div> |
| <div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < System.Math.Min(25, len); i++)</div> |
| <div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  {</div> |
| <div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">Document</a> d = searcher.<a class="code" href="../../df/dbe/class_lucene_1_1_net_1_1_search_1_1_index_searcher.html#aed5283dc1e8c56fa09bb2c82337e9d8b" title="Expert: Returns the stored fields of document i.">Doc</a>(scoreDocs[i].Doc);</div> |
| <div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  System.String summary = d.Get(<span class="stringliteral">"summary"</span>);</div> |
| <div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  o.WriteLine(<span class="stringliteral">"score : "</span> + scoreDocs[i].Score);</div> |
| <div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  o.WriteLine(<span class="stringliteral">"url : "</span> + d.Get(<span class="stringliteral">"url"</span>));</div> |
| <div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  o.WriteLine(<span class="stringliteral">"\ttitle : "</span> + d.Get(<span class="stringliteral">"title"</span>));</div> |
| <div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keywordflow">if</span> (summary != null)</div> |
| <div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  o.WriteLine(<span class="stringliteral">"\tsummary: "</span> + d.Get(<span class="stringliteral">"summary"</span>));</div> |
| <div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  o.WriteLine();</div> |
| <div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  }</div> |
| <div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  }</div> |
| <div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00707"></a><span class="lineno"> 707</span> <span class="comment"> /// <summary> Find words for a more-like-this query former.</span></div> |
| <div class="line"><a name="l00708"></a><span class="lineno"> 708</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <span class="comment"> /// <param name="docNum">the id of the lucene document from which to find terms</span></div> |
| <div class="line"><a name="l00711"></a><span class="lineno"> 711</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment"></span> <span class="keyword">private</span> PriorityQueue<object[]> RetrieveTerms(<span class="keywordtype">int</span> docNum)</div> |
| <div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  {</div> |
| <div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  IDictionary<string,Int> termFreqMap = <span class="keyword">new</span> HashMap<string,Int>();</div> |
| <div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < fieldNames.Length; i++)</div> |
| <div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  {</div> |
| <div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  System.String fieldName = fieldNames[i];</div> |
| <div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <a class="code" href="../../dc/d14/interface_lucene_1_1_net_1_1_index_1_1_i_term_freq_vector.html" title="Provides access to stored term vector of a document field. The vector consists of the name of the fie...">ITermFreqVector</a> vector = ir.GetTermFreqVector(docNum, fieldName);</div> |
| <div class="line"><a name="l00719"></a><span class="lineno"> 719</span> </div> |
| <div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="comment">// field does not store term vector info</span></div> |
| <div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  <span class="keywordflow">if</span> (vector == null)</div> |
| <div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  {</div> |
| <div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a2ad6aef8641c7b7a6cf9277f7d54b2cd">Document</a> d = ir.Document(docNum);</div> |
| <div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  System.String[] text = d.GetValues(fieldName);</div> |
| <div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <span class="keywordflow">if</span> (text != null)</div> |
| <div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  {</div> |
| <div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < text.Length; j++)</div> |
| <div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  {</div> |
| <div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  AddTermFrequencies(<span class="keyword">new</span> System.IO.StringReader(text[j]), termFreqMap, fieldName);</div> |
| <div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  }</div> |
| <div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  }</div> |
| <div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  }</div> |
| <div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  {</div> |
| <div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  AddTermFrequencies(termFreqMap, vector);</div> |
| <div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  }</div> |
| <div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  }</div> |
| <div class="line"><a name="l00738"></a><span class="lineno"> 738</span> </div> |
| <div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="keywordflow">return</span> CreateQueue(termFreqMap);</div> |
| <div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  }</div> |
| <div class="line"><a name="l00741"></a><span class="lineno"> 741</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00742"></a><span class="lineno"> 742</span> <span class="comment"> /// <summary> Adds terms and frequencies found in vector into the Map termFreqMap</summary></span></div> |
| <div class="line"><a name="l00743"></a><span class="lineno"> 743</span> <span class="comment"> /// <param name="termFreqMap">a Map of terms and their frequencies</span></div> |
| <div class="line"><a name="l00744"></a><span class="lineno"> 744</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00745"></a><span class="lineno"> 745</span> <span class="comment"> /// <param name="vector">List of terms and their frequencies for a doc/field</span></div> |
| <div class="line"><a name="l00746"></a><span class="lineno"> 746</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">void</span> AddTermFrequencies(IDictionary<string, Int> termFreqMap, <a class="code" href="../../dc/d14/interface_lucene_1_1_net_1_1_index_1_1_i_term_freq_vector.html" title="Provides access to stored term vector of a document field. The vector consists of the name of the fie...">ITermFreqVector</a> vector)</div> |
| <div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  {</div> |
| <div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  System.String[] terms = vector.<a class="code" href="../../dc/d14/interface_lucene_1_1_net_1_1_index_1_1_i_term_freq_vector.html#a9a0fd66926229e5509e05a7e7358e8f5">GetTerms</a>();</div> |
| <div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keywordtype">int</span>[] freqs = vector.<a class="code" href="../../dc/d14/interface_lucene_1_1_net_1_1_index_1_1_i_term_freq_vector.html#ac369bbcf6b0c91d554f7b5c6ad037fa8" title="Array of term frequencies. Locations of the array correspond one to one to the terms in the array obt...">GetTermFrequencies</a>();</div> |
| <div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < terms.Length; j++)</div> |
| <div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  {</div> |
| <div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  System.String term = terms[j];</div> |
| <div class="line"><a name="l00754"></a><span class="lineno"> 754</span> </div> |
| <div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="keywordflow">if</span> (IsNoiseWord(term))</div> |
| <div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  {</div> |
| <div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordflow">continue</span>;</div> |
| <div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  }</div> |
| <div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="comment">// increment frequency</span></div> |
| <div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  Int cnt = termFreqMap[term];</div> |
| <div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordflow">if</span> (cnt == null)</div> |
| <div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  {</div> |
| <div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  cnt = <span class="keyword">new</span> Int();</div> |
| <div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  termFreqMap[term] = cnt;</div> |
| <div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  cnt.x = freqs[j];</div> |
| <div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  }</div> |
| <div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  {</div> |
| <div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  cnt.x += freqs[j];</div> |
| <div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  }</div> |
| <div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  }</div> |
| <div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  }<span class="comment"></span></div> |
| <div class="line"><a name="l00773"></a><span class="lineno"> 773</span> <span class="comment"> /// <summary> Adds term frequencies found by tokenizing text from reader into the Map words</summary></span></div> |
| <div class="line"><a name="l00774"></a><span class="lineno"> 774</span> <span class="comment"> /// <param name="r">a source of text to be tokenized</span></div> |
| <div class="line"><a name="l00775"></a><span class="lineno"> 775</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00776"></a><span class="lineno"> 776</span> <span class="comment"> /// <param name="termFreqMap">a Map of terms and their frequencies</span></div> |
| <div class="line"><a name="l00777"></a><span class="lineno"> 777</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00778"></a><span class="lineno"> 778</span> <span class="comment"> /// <param name="fieldName">Used by analyzer for any special per-field analysis</span></div> |
| <div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00780"></a><span class="lineno"> 780</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">void</span> AddTermFrequencies(System.IO.TextReader r, IDictionary<string,Int> termFreqMap, System.String fieldName)</div> |
| <div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  {</div> |
| <div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <a class="code" href="../../dd/d53/_more_like_this_8cs.html#a205730fc8c2839cf92051d131140dae0">TokenStream</a> ts = analyzer.TokenStream(fieldName, r);</div> |
| <div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keywordtype">int</span> tokenCount=0;</div> |
| <div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="comment">// for every token</span></div> |
| <div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  <a class="code" href="../../d2/d65/interface_lucene_1_1_net_1_1_analysis_1_1_tokenattributes_1_1_i_term_attribute.html" title="The term text of a Token.">ITermAttribute</a> termAtt = ts.AddAttribute<<a class="code" href="../../d2/d65/interface_lucene_1_1_net_1_1_analysis_1_1_tokenattributes_1_1_i_term_attribute.html" title="The term text of a Token.">ITermAttribute</a>>();</div> |
| <div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  </div> |
| <div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keywordflow">while</span> (ts.IncrementToken()) {</div> |
| <div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="keywordtype">string</span> word = termAtt.<a class="code" href="../../d2/d65/interface_lucene_1_1_net_1_1_analysis_1_1_tokenattributes_1_1_i_term_attribute.html#acdcd805612ee71187baaf3ab48d73536" title="Returns the Token's term text.">Term</a>;</div> |
| <div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  tokenCount++;</div> |
| <div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="keywordflow">if</span>(tokenCount>maxNumTokensParsed)</div> |
| <div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  {</div> |
| <div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  }</div> |
| <div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  <span class="keywordflow">if</span>(IsNoiseWord(word)){</div> |
| <div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <span class="keywordflow">continue</span>;</div> |
| <div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  }</div> |
| <div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  </div> |
| <div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  <span class="comment">// increment frequency</span></div> |
| <div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  Int cnt = termFreqMap[word];</div> |
| <div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="keywordflow">if</span> (cnt == null) {</div> |
| <div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  termFreqMap[word] = <span class="keyword">new</span> Int();</div> |
| <div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  }</div> |
| <div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  cnt.x++;</div> |
| <div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  }</div> |
| <div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  }</div> |
| <div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  }</div> |
| <div class="line"><a name="l00808"></a><span class="lineno"> 808</span> </div> |
| <div class="line"><a name="l00809"></a><span class="lineno"> 809</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00810"></a><span class="lineno"> 810</span> <span class="comment"> /// <summary>determines if the passed term is likely to be of interest in "more like" comparisons </span></div> |
| <div class="line"><a name="l00811"></a><span class="lineno"> 811</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00812"></a><span class="lineno"> 812</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00813"></a><span class="lineno"> 813</span> <span class="comment"> /// <param name="term">The word being considered</span></div> |
| <div class="line"><a name="l00814"></a><span class="lineno"> 814</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00815"></a><span class="lineno"> 815</span> <span class="comment"> /// <returns> true if should be ignored, false if should be used in further analysis</span></div> |
| <div class="line"><a name="l00816"></a><span class="lineno"> 816</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00817"></a><span class="lineno"> 817</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keywordtype">bool</span> IsNoiseWord(System.String term)</div> |
| <div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  {</div> |
| <div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <span class="keywordtype">int</span> len = term.Length;</div> |
| <div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  <span class="keywordflow">if</span> (minWordLen > 0 && len < minWordLen)</div> |
| <div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  {</div> |
| <div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  }</div> |
| <div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="keywordflow">if</span> (maxWordLen > 0 && len > maxWordLen)</div> |
| <div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  {</div> |
| <div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  }</div> |
| <div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="keywordflow">if</span> (stopWords != null && stopWords.Contains(term))</div> |
| <div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  {</div> |
| <div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  }</div> |
| <div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  }</div> |
| <div class="line"><a name="l00834"></a><span class="lineno"> 834</span> </div> |
| <div class="line"><a name="l00835"></a><span class="lineno"> 835</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00836"></a><span class="lineno"> 836</span> <span class="comment"> /// <summary> Find words for a more-like-this query former.</span></div> |
| <div class="line"><a name="l00837"></a><span class="lineno"> 837</span> <span class="comment"> /// The result is a priority queue of arrays with one entry for <b>every word</b> in the document.</span></div> |
| <div class="line"><a name="l00838"></a><span class="lineno"> 838</span> <span class="comment"> /// Each array has 6 elements.</span></div> |
| <div class="line"><a name="l00839"></a><span class="lineno"> 839</span> <span class="comment"> /// The elements are:</span></div> |
| <div class="line"><a name="l00840"></a><span class="lineno"> 840</span> <span class="comment"> /// <ol></span></div> |
| <div class="line"><a name="l00841"></a><span class="lineno"> 841</span> <span class="comment"> /// <li> The word (String)</li></span></div> |
| <div class="line"><a name="l00842"></a><span class="lineno"> 842</span> <span class="comment"> /// <li> The top field that this word comes from (String)</li></span></div> |
| <div class="line"><a name="l00843"></a><span class="lineno"> 843</span> <span class="comment"> /// <li> The score for this word (Float)</li></span></div> |
| <div class="line"><a name="l00844"></a><span class="lineno"> 844</span> <span class="comment"> /// <li> The IDF value (Float)</li></span></div> |
| <div class="line"><a name="l00845"></a><span class="lineno"> 845</span> <span class="comment"> /// <li> The frequency of this word in the index (Integer)</li></span></div> |
| <div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="comment"> /// <li> The frequency of this word in the source document (Integer)</li></span></div> |
| <div class="line"><a name="l00847"></a><span class="lineno"> 847</span> <span class="comment"> /// </ol></span></div> |
| <div class="line"><a name="l00848"></a><span class="lineno"> 848</span> <span class="comment"> /// This is a somewhat "advanced" routine, and in general only the 1st entry in the array is of interest.</span></div> |
| <div class="line"><a name="l00849"></a><span class="lineno"> 849</span> <span class="comment"> /// This method is exposed so that you can identify the "interesting words" in a document.</span></div> |
| <div class="line"><a name="l00850"></a><span class="lineno"> 850</span> <span class="comment"> /// For an easier method to call see <see cref="RetrieveInterestingTerms(System.IO.TextReader)"/>.</span></div> |
| <div class="line"><a name="l00851"></a><span class="lineno"> 851</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00852"></a><span class="lineno"> 852</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00853"></a><span class="lineno"> 853</span> <span class="comment"> /// <param name="r">the reader that has the content of the document</span></div> |
| <div class="line"><a name="l00854"></a><span class="lineno"> 854</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00855"></a><span class="lineno"> 855</span> <span class="comment"> /// <returns> the most intresting words in the document ordered by score, with the highest scoring, or best entry, first</span></div> |
| <div class="line"><a name="l00856"></a><span class="lineno"> 856</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00858"></a><span class="lineno"> 858</span> <span class="comment"> /// <seealso cref="RetrieveInterestingTerms(System.IO.TextReader)"></span></div> |
| <div class="line"><a name="l00859"></a><span class="lineno"> 859</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00860"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#a5361a52d9ea2eaf432118ca8a1a71d9e"> 860</a></span> <span class="comment"></span> <span class="keyword">public</span> PriorityQueue<object[]> RetrieveTerms(System.IO.TextReader r)</div> |
| <div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  {</div> |
| <div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  IDictionary<string, Int> words = <span class="keyword">new</span> HashMap<string,Int>();</div> |
| <div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < fieldNames.Length; i++)</div> |
| <div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  {</div> |
| <div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  System.String fieldName = fieldNames[i];</div> |
| <div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  AddTermFrequencies(r, words, fieldName);</div> |
| <div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  }</div> |
| <div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <span class="keywordflow">return</span> CreateQueue(words);</div> |
| <div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  }</div> |
| <div class="line"><a name="l00870"></a><span class="lineno"> 870</span> </div> |
| <div class="line"><a name="l00871"></a><span class="lineno"> 871</span> </div> |
| <div class="line"><a name="l00872"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#acc344770e52b25fc6672cb20dff57bb2"> 872</a></span>  <span class="keyword">public</span> System.String[] RetrieveInterestingTerms(<span class="keywordtype">int</span> docNum)</div> |
| <div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  {</div> |
| <div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  List<object> al = <span class="keyword">new</span> List<object>(maxQueryTerms);</div> |
| <div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  PriorityQueue<object[]> pq = RetrieveTerms(docNum);</div> |
| <div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  System.Object cur;</div> |
| <div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  <span class="keywordtype">int</span> lim = maxQueryTerms; <span class="comment">// have to be careful, retrieveTerms returns all words but that's probably not useful to our caller...</span></div> |
| <div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <span class="comment">// we just want to return the top words</span></div> |
| <div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  <span class="keywordflow">while</span> (((cur = pq.Pop()) != null) && lim-- > 0)</div> |
| <div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  {</div> |
| <div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  System.Object[] ar = (System.Object[])cur;</div> |
| <div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  al.Add(ar[0]); <span class="comment">// the 1st entry is the interesting word</span></div> |
| <div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  }</div> |
| <div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  <span class="comment">//System.String[] res = new System.String[al.Count];</span></div> |
| <div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <span class="comment">//return al.toArray(res);</span></div> |
| <div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  <span class="keywordflow">return</span> al.Select(x => x.ToString()).ToArray();</div> |
| <div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  }</div> |
| <div class="line"><a name="l00888"></a><span class="lineno"> 888</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00889"></a><span class="lineno"> 889</span> <span class="comment"> /// <summary> Convenience routine to make it easy to return the most interesting words in a document.</span></div> |
| <div class="line"><a name="l00890"></a><span class="lineno"> 890</span> <span class="comment"> /// More advanced users will call <see cref="RetrieveTerms(System.IO.TextReader)"/> directly.</span></div> |
| <div class="line"><a name="l00891"></a><span class="lineno"> 891</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00892"></a><span class="lineno"> 892</span> <span class="comment"> /// <param name="r">the source document</span></div> |
| <div class="line"><a name="l00893"></a><span class="lineno"> 893</span> <span class="comment"> /// </param></span></div> |
| <div class="line"><a name="l00894"></a><span class="lineno"> 894</span> <span class="comment"> /// <returns> the most interesting words in the document</span></div> |
| <div class="line"><a name="l00895"></a><span class="lineno"> 895</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00896"></a><span class="lineno"> 896</span> <span class="comment"> /// </returns></span></div> |
| <div class="line"><a name="l00897"></a><span class="lineno"> 897</span> <span class="comment"> /// <seealso cref="RetrieveTerms(System.IO.TextReader)"></span></div> |
| <div class="line"><a name="l00898"></a><span class="lineno"> 898</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00899"></a><span class="lineno"> 899</span> <span class="comment"> /// <seealso cref="MaxQueryTerms"></span></div> |
| <div class="line"><a name="l00900"></a><span class="lineno"> 900</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00901"></a><span class="lineno"><a class="code" href="../../dd/dd0/class_lucene_1_1_net_1_1_search_1_1_similar_1_1_more_like_this.html#ac7a96486573d69fc863a5944a3765839"> 901</a></span> <span class="comment"></span> <span class="keyword">public</span> System.String[] RetrieveInterestingTerms(System.IO.TextReader r)</div> |
| <div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  {</div> |
| <div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  List<object> al = <span class="keyword">new</span> List<object>(maxQueryTerms);</div> |
| <div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  PriorityQueue<object[]> pq = RetrieveTerms(r);</div> |
| <div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  System.Object cur;</div> |
| <div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  <span class="keywordtype">int</span> lim = maxQueryTerms; <span class="comment">// have to be careful, retrieveTerms returns all words but that's probably not useful to our caller...</span></div> |
| <div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  <span class="comment">// we just want to return the top words</span></div> |
| <div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  <span class="keywordflow">while</span> (((cur = pq.Pop()) != null) && lim-- > 0)</div> |
| <div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  {</div> |
| <div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  System.Object[] ar = (System.Object[])cur;</div> |
| <div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  al.Add(ar[0]); <span class="comment">// the 1st entry is the interesting word</span></div> |
| <div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  }</div> |
| <div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  <span class="comment">//System.String[] res = new System.String[al.Count];</span></div> |
| <div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  <span class="comment">// return (System.String[]) SupportClass.ICollectionSupport.ToArray(al, res);</span></div> |
| <div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  <span class="keywordflow">return</span> al.Select(x => x.ToString()).ToArray();</div> |
| <div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  }</div> |
| <div class="line"><a name="l00917"></a><span class="lineno"> 917</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00918"></a><span class="lineno"> 918</span> <span class="comment"> /// <summary> PriorityQueue that orders words by score.</summary></span></div> |
| <div class="line"><a name="l00919"></a><span class="lineno"> 919</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keyword">class </span>FreqQ : <a class="code" href="../../d3/d14/namespace_spell_checker_1_1_net_1_1_search_1_1_spell.html#a050da50134c60f7d9891255871a07fc1">PriorityQueue</a><object[]></div> |
| <div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  {</div> |
| <div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <span class="keyword">internal</span> FreqQ(<span class="keywordtype">int</span> s)</div> |
| <div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  {</div> |
| <div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  Initialize(s);</div> |
| <div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  }</div> |
| <div class="line"><a name="l00925"></a><span class="lineno"> 925</span> </div> |
| <div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  <span class="keyword">override</span> <span class="keyword">public</span> <span class="keywordtype">bool</span> LessThan(System.Object[] aa, System.Object[] bb)</div> |
| <div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  {</div> |
| <div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  <span class="keywordtype">float</span> fa = (float)aa[2];</div> |
| <div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  <span class="keywordtype">float</span> fb = (float)bb[2];</div> |
| <div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <span class="keywordflow">return</span> (<span class="keywordtype">float</span>)fa > (float)fb;</div> |
| <div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  }</div> |
| <div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  }</div> |
| <div class="line"><a name="l00933"></a><span class="lineno"> 933</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00934"></a><span class="lineno"> 934</span> <span class="comment"> /// <summary> Use for frequencies and to avoid renewing Integers.</summary></span></div> |
| <div class="line"><a name="l00935"></a><span class="lineno"> 935</span> <span class="comment"></span> <span class="keyword">private</span> <span class="keyword">class </span>Int</div> |
| <div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  {</div> |
| <div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> x;</div> |
| <div class="line"><a name="l00938"></a><span class="lineno"> 938</span> </div> |
| <div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <span class="keyword">internal</span> Int()</div> |
| <div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  {</div> |
| <div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  x = 1;</div> |
| <div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  }</div> |
| <div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  }</div> |
| <div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  }</div> |
| <div class="line"><a name="l00945"></a><span class="lineno"> 945</span> }</div> |
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