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| <div class="title">ArabicAnalyzer.cs</div> </div> |
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| <a href="_arabic_analyzer_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.Collections;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> System.Linq;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">using</span> Lucene.Net.Analysis;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4"> 24</a></span> <span class="keyword">using</span> <a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> = Lucene.Net.Util.Version;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">using</span> Lucene.Net.Support.Compatibility;</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> |
| <div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="namespace_lucene_1_1_net_1_1_analysis_1_1_a_r.html"> 27</a></span> <span class="keyword">namespace </span>Lucene.Net.Analysis.AR</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> {</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * <see cref="Analyzer"/> for Arabic. </span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * <p/></span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * This analyzer implements light-stemming as specified by:</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * <i></span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * Light Stemming for Arabic Information Retrieval</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * </i> </span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * http://www.mtholyoke.edu/~lballest/Pubs/arab_stem05.pdf</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * <p/></span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * The analysis package contains three primary components:</span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * <ul></span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * <li><see cref="ArabicNormalizationFilter"/>: Arabic orthographic normalization.</li></span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * <li><see cref="ArabicStemFilter"/>: Arabic light stemming</li></span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * <li>Arabic stop words file: a set of default Arabic stop words.</li></span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * </ul></span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html"> 46</a></span>  <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a> : <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></div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </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"> * File containing default Arabic stopwords.</span></div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * Default stopword list is from http://members.unine.ch/jacques.savoy/clef/index.html</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * The stopword list is BSD-Licensed.</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00055"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#adca0e40088194a242e3e3965ba56c4d1"> 55</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">string</span> DEFAULT_STOPWORD_FILE = <span class="stringliteral">"ArabicStopWords.txt"</span>;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * Contains the stopwords used with the StopFilter.</span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">private</span> readonly ISet<string> stoptable;</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">/*<summary></span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * The comment character in the stopwords file. All lines prefixed with this will be ignored </span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * </summary></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>  [Obsolete(<span class="stringliteral">"Use WordListLoader.GetWordSet(FileInfo, string) directly"</span>)]</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#aebbb02ca5e86947df79ee0eca65492a2"> 66</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">string</span> STOPWORDS_COMMENT = <span class="stringliteral">"#"</span>;</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div> |
| <div class="line"><a name="l00072"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a0d235e76f398f331b60e02564a00b324"> 72</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> ISet<string> GetDefaultStopSet()</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  {</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> DefaultSetHolder.DEFAULT_STOP_SET;</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">class </span>DefaultSetHolder</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  {</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">internal</span> <span class="keyword">static</span> ISet<string> DEFAULT_STOP_SET;</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">static</span> DefaultSetHolder()</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">try</span></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>  DEFAULT_STOP_SET = LoadDefaultStopWordSet();</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">catch</span> (System.IO.IOException)</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>  <span class="comment">// default set should always be present as it is part of the</span></div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// distribution (JAR)</span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">throw</span> <span class="keyword">new</span> Exception(<span class="stringliteral">"Unable to load default stopword set"</span>);</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  }</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">internal</span> <span class="keyword">static</span> ISet<string> LoadDefaultStopWordSet()</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  {</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">using</span> (StreamReader reader = <span class="keyword">new</span> StreamReader(System.Reflection.Assembly.GetAssembly(typeof(ArabicAnalyzer)).GetManifestResourceStream(<span class="stringliteral">"Lucene.Net.Analysis.AR."</span> + DEFAULT_STOPWORD_FILE)))</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html" title="A simple class that stores Strings as char[]'s in a hash table. Note that this is not a general purpo...">CharArraySet</a>.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html#a044a75a96e08ce42d40f81f4f160c4e6" title="Returns an unmodifiable CharArraySet. This allows to provide unmodifiable views of internal sets for ...">UnmodifiableSet</a>(<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html" title="A simple class that stores Strings as char[]'s in a hash table. Note that this is not a general purpo...">CharArraySet</a>.Copy(<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_wordlist_loader.html" title="Loader for text files that represent a list of stopwords.">WordlistLoader</a>.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_wordlist_loader.html#a8c03d44044716caeb31ea634057f164f" title="Loads a text file and adds every line as an entry to a HashSet (omitting leading and trailing whitesp...">GetWordSet</a>(reader, STOPWORDS_COMMENT)));</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  }</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">private</span> <a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion;</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * Builds an analyzer with the default stop words: <see cref="DEFAULT_STOPWORD_FILE"/>.</span></div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00109"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a04ae7f2f072010119232837fe40386b0"> 109</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion)</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  : this(matchVersion, DefaultSetHolder.DEFAULT_STOP_SET)</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#acbeef85b2cd3dddaebfcfe09508d53f5"> 119</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, ISet<string> stopwords)</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  {</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  stoptable = <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html" title="A simple class that stores Strings as char[]'s in a hash table. Note that this is not a general purpo...">CharArraySet</a>.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html#a044a75a96e08ce42d40f81f4f160c4e6" title="Returns an unmodifiable CharArraySet. This allows to provide unmodifiable views of internal sets for ...">UnmodifiableSet</a>(<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_char_array_set.html" title="A simple class that stores Strings as char[]'s in a hash table. Note that this is not a general purpo...">CharArraySet</a>.Copy(stopwords));</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  this.matchVersion = matchVersion;</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * Builds an analyzer with the given stop words.</span></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  [Obsolete(<span class="stringliteral">"Use ArabicAnalyzer(Version, Set) instead"</span>)]</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a0faedd068330b2d09adbd4a9443a5216"> 129</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, params <span class="keywordtype">string</span>[] stopwords)</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  : this(matchVersion, <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html" title="Removes stop words from a token stream.">StopFilter</a>.MakeStopSet(stopwords))</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  {</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * Builds an analyzer with the given stop words.</span></div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  [Obsolete(<span class="stringliteral">"Use ArabicAnalyzer(Version, Set) instead"</span>)]</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a3331c307fad0bd3a00b58f82903f8404"> 138</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, IDictionary<string, string> stopwords)</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  : this(matchVersion, stopwords.Keys.ToArray())</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  {</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * Builds an analyzer with the given stop words. Lines can be commented out using <see cref="STOPWORDS_COMMENT"/></span></div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00146"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#aa30d20998318c5f7d6e5a862d5918ac9"> 146</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html">ArabicAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, FileInfo stopwords)</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  : this(matchVersion, <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_wordlist_loader.html" title="Loader for text files that represent a list of stopwords.">WordlistLoader</a>.GetWordSet(stopwords, STOPWORDS_COMMENT))</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  {</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * Creates a <see cref="TokenStream"/> which tokenizes all the text in the provided <see cref="TextReader"/>.</span></div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> * <returns>A <see cref="TokenStream"/> built from an <see cref="ArabicLetterTokenizer"/> filtered with</span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> * <see cref="LowerCaseFilter"/>, <see cref="StopFilter"/>, <see cref="ArabicNormalizationFilter"/></span></div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> * and <see cref="ArabicStemFilter"/>.</returns></span></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"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a267cbb73343d907e89122e6a0df8a0f9"> 159</a></span>  <span class="keyword">public</span> <span class="keyword">override</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> <a class="code" href="_more_like_this_8cs.html#a205730fc8c2839cf92051d131140dae0">TokenStream</a>(<span class="keywordtype">string</span> fieldName, TextReader reader)</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  {</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <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> result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_letter_tokenizer.html">ArabicLetterTokenizer</a>(reader);</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_lower_case_filter.html" title="Normalizes token text to lower case.">LowerCaseFilter</a>(result);</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// the order here is important: the stopword list is not normalized!</span></div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html" title="Removes stop words from a token stream.">StopFilter</a>(<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html" title="Removes stop words from a token stream.">StopFilter</a>.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html#ab11fb0a8f9564b60ae61e29bef912ca8" title="Returns version-dependent default for enablePositionIncrements. Analyzers that embed StopFilter use t...">GetEnablePositionIncrementsVersionDefault</a>(matchVersion), result, stoptable);</div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalization_filter.html">ArabicNormalizationFilter</a>(result);</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stem_filter.html">ArabicStemFilter</a>(result);</div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> result;</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keyword">private</span> <span class="keyword">class </span>SavedStreams</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  {</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_tokenizer.html" title="A Tokenizer is a TokenStream whose input is a Reader. This is an abstract class; subclasses must over...">Tokenizer</a> Source;</div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keyword">internal</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> Result;</div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  };</div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * Returns a (possibly reused) <see cref="TokenStream"/> which tokenizes all the text </span></div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * in the provided <see cref="TextReader"/>.</span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * <returns>A <see cref="TokenStream"/> built from an <see cref="ArabicLetterTokenizer"/> filtered with</span></div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * <see cref="LowerCaseFilter"/>, <see cref="StopFilter"/>, <see cref="ArabicNormalizationFilter"/></span></div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> * and <see cref="ArabicStemFilter"/>.</returns></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"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_analyzer.html#a86cab4bf916ca9fb0ca049b99ff39f6f"> 185</a></span>  <span class="keyword">public</span> <span class="keyword">override</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> ReusableTokenStream(<span class="keywordtype">string</span> fieldName, TextReader reader)</div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  {</div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  SavedStreams streams = (SavedStreams)PreviousTokenStream;</div> |
| <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">if</span> (streams == null)</div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  {</div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  streams = <span class="keyword">new</span> SavedStreams();</div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  streams.Source = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_letter_tokenizer.html">ArabicLetterTokenizer</a>(reader);</div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  streams.Result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_lower_case_filter.html" title="Normalizes token text to lower case.">LowerCaseFilter</a>(streams.Source);</div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// the order here is important: the stopword list is not normalized!</span></div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  streams.Result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html" title="Removes stop words from a token stream.">StopFilter</a>(<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html" title="Removes stop words from a token stream.">StopFilter</a>.<a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_stop_filter.html#ab11fb0a8f9564b60ae61e29bef912ca8" title="Returns version-dependent default for enablePositionIncrements. Analyzers that embed StopFilter use t...">GetEnablePositionIncrementsVersionDefault</a>(matchVersion),</div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  streams.Result, stoptable);</div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  streams.Result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalization_filter.html">ArabicNormalizationFilter</a>(streams.Result);</div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  streams.Result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stem_filter.html">ArabicStemFilter</a>(streams.Result);</div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  PreviousTokenStream = streams;</div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  }</div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  {</div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  streams.Source.Reset(reader);</div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  }</div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> streams.Result;</div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div> |
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