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| <a href="_snowball_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> Lucene.Net.Analysis;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> Lucene.Net.Analysis.Standard;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">using</span> SF.Snowball.Ext;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="_snowball_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> </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="namespace_lucene_1_1_net_1_1_analysis_1_1_snowball.html"> 26</a></span> <span class="keyword">namespace </span>Lucene.Net.Analysis.Snowball</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> {</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div> |
| <div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html"> 39</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_snowball_1_1_snowball_analyzer.html" title="Filters StandardTokenizer with StandardFilter, LowerCaseFilter, StopFilter and SnowballFilter.">SnowballAnalyzer</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="l00040"></a><span class="lineno"> 40</span>  {</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">private</span> System.String name;</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keyword">private</span> ISet<string> stopSet;</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">private</span> readonly <a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion;</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</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_snowball_1_1_snowball_analyzer.html#a005e70b5d58797085ca93a2b206cc8ef"> 46</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html" title="Filters StandardTokenizer with StandardFilter, LowerCaseFilter, StopFilter and SnowballFilter.">SnowballAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, System.String name)</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>  this.name = name;</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  SetOverridesTokenStreamMethod<SnowballAnalyzer>();</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  this.matchVersion = matchVersion;</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  [Obsolete(<span class="stringliteral">"Use SnowballAnalyzer(Version, string, ISet) instead."</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_snowball_1_1_snowball_analyzer.html#a3a6a6f6ba89e2757b2fdae5774a6419b"> 55</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html" title="Filters StandardTokenizer with StandardFilter, LowerCaseFilter, StopFilter and SnowballFilter.">SnowballAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, System.String name, System.String[] stopWords)</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  : this(matchVersion, name)</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  {</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  stopSet = <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#a4a5a7cbe2ee7980ed82b9d933b41d7bc" title="Builds a Set from an array of stop words, appropriate for passing into the StopFilter constructor...">MakeStopSet</a>(stopWords);</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div> |
| <div class="line"><a name="l00064"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html#ac5f194d3cf1911e0699e1c36062195e0"> 64</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html" title="Filters StandardTokenizer with StandardFilter, LowerCaseFilter, StopFilter and SnowballFilter.">SnowballAnalyzer</a>(<a class="code" href="_arabic_analyzer_8cs.html#a63c914dcb7d19365ff0f7c6ea7ef77c4">Version</a> matchVersion, <span class="keywordtype">string</span> name, ISet<string> stopWords)</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  : this(matchVersion, name)</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  {</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  stopSet = <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="l00068"></a><span class="lineno"> 68</span>  }</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div> |
| <div class="line"><a name="l00073"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html#abfb986f703a960a587bb04eda1336d71"> 73</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>(System.String fieldName, System.IO.TextReader reader)</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  {</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</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_standard_1_1_standard_tokenizer.html" title="A grammar-based tokenizer constructed with JFlex">StandardTokenizer</a>(matchVersion, reader);</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_standard_1_1_standard_filter.html" title="Normalizes tokens extracted with StandardTokenizer. ">StandardFilter</a>(result);</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</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="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> (stopSet != null)</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</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),</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  result, stopSet);</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_filter.html" title="A filter that stems words using a Snowball-generated stemmer.">SnowballFilter</a>(result, name);</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> result;</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</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>  <span class="keyword">private</span> <span class="keyword">class </span>SavedStreams</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="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="l00088"></a><span class="lineno"> 88</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="l00089"></a><span class="lineno"> 89</span>  };</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">/* Returns a (possibly reused) {@link StandardTokenizer} filtered by a </span></div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * {@link StandardFilter}, a {@link LowerCaseFilter}, </span></div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * a {@link StopFilter}, and a {@link SnowballFilter} */</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"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_analyzer.html#a6577d951f67ef2cb35b66feff5b50cde"> 95</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(String fieldName, TextReader reader)</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="keywordflow">if</span> (overridesTokenStreamMethod)</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="comment">// LUCENE-1678: force fallback to tokenStream() if we</span></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="comment">// have been subclassed and that subclass overrides</span></div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// tokenStream but not reusableTokenStream</span></div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> <a class="code" href="_more_like_this_8cs.html#a205730fc8c2839cf92051d131140dae0">TokenStream</a>(fieldName, reader);</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  SavedStreams streams = (SavedStreams)PreviousTokenStream;</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">if</span> (streams == null)</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>  streams = <span class="keyword">new</span> SavedStreams();</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  streams.source = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_standard_1_1_standard_tokenizer.html" title="A grammar-based tokenizer constructed with JFlex">StandardTokenizer</a>(matchVersion, reader);</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  streams.result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_standard_1_1_standard_filter.html" title="Normalizes tokens extracted with StandardTokenizer. ">StandardFilter</a>(streams.source);</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</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.result);</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (stopSet != null)</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</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="l00114"></a><span class="lineno"> 114</span>  streams.result, stopSet);</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  streams.result = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_snowball_1_1_snowball_filter.html" title="A filter that stems words using a Snowball-generated stemmer.">SnowballFilter</a>(streams.result, name);</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  PreviousTokenStream = streams;</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  }</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  streams.source.Reset(reader);</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span> streams.result;</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> }</div> |
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