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| <a href="_similarity_queries_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> Lucene.Net.Analysis;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">using</span> Lucene.Net.Index;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> Lucene.Net.Analysis.Tokenattributes;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">namespace </span>Lucene.Net.Search.Similar</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> {</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similar_1_1_similarity_queries.html"> 33</a></span>  <span class="keyword">public</span> sealed <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similar_1_1_similarity_queries.html" title="Simple similarity measures.">SimilarityQueries</a></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  {</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">private</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similar_1_1_similarity_queries.html" title="Simple similarity measures.">SimilarityQueries</a>()</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  {</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  }</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div> |
| <div class="line"><a name="l00080"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similar_1_1_similarity_queries.html#a7ed39dbe747d7dc9bec0dfd5ea8cf419"> 80</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_query.html" title="The abstract base class for queries. Instantiable subclasses are: TermQuery MultiTermQuery BooleanQ...">Query</a> FormSimilarQuery(System.String body, <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html" title="An Analyzer builds TokenStreams, which analyze text. It thus represents a policy for extracting index...">Analyzer</a> a, System.String field, ISet<string> stop)</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html" title="A TokenStream enumerates the sequence of tokens, either from Fields of a Document or from query text...">TokenStream</a> ts = a.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_analyzer.html#ac031bae47f64e6bbe2117c991996f5fc" title="Creates a TokenStream which tokenizes all the text in the provided Reader. Must be able to handle nul...">TokenStream</a>(field, <span class="keyword">new</span> System.IO.StringReader(body));</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="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="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="l00084"></a><span class="lineno"> 84</span> </div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="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> tmp = <span class="keyword">new</span> <a class="code" href="_more_like_this_8cs.html#ae2b9948961aeea34f9c4e4955536f433">BooleanQuery</a>();</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  ISet<string> already = Lucene.Net.Support.Compatibility.SetFactory.CreateHashSet<<span class="keywordtype">string</span>>(); <span class="comment">// ignore dups</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">while</span> (ts.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html#a358a544108511440a57b134e722f6027" title="Consumers (i.e., IndexWriter) use this method to advance the stream to the next token. Implementing classes must implement this method and update the appropriate Util.Attributes with the attributes of the next token.">IncrementToken</a>())</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  {</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  String word = termAtt.<a class="code" href="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="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// ignore opt stop words</span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span> (stop != null && stop.Contains(word))</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">continue</span>;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// ignore dups</span></div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (already.Contains(word))</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">continue</span>;</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  already.Add(word);</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// add to query</span></div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="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="_more_like_this_8cs.html#a13f0b68c1e7c8f509c3a0be1441df5d9">TermQuery</a>(<span class="keyword">new</span> <a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a>(field, word));</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">try</span></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  {</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  tmp.Add(tq, <a class="code" href="namespace_lucene_1_1_net_1_1_search.html#a99a7442e50a0ff52bf00ddb319eb9d34">Occur</a>.SHOULD);</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">catch</span> (<a class="code" href="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>.TooManyClauses)</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// fail-safe, just return what we have, not the end of the world</span></div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> tmp;</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</div> |
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