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| <div class="title">KeywordTokenizer.cs</div> </div> |
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| <div class="contents"> |
| <a href="_keyword_tokenizer_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> Lucene.Net.Analysis.Tokenattributes;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"><a class="code" href="_keyword_tokenizer_8cs.html#aed60c4e663aea1a7dec59cf4c3710058"> 19</a></span> <span class="keyword">using</span> <a class="code" href="_char_tokenizer_8cs.html#aed60c4e663aea1a7dec59cf4c3710058">AttributeSource</a> = Lucene.Net.Util.AttributeSource;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>Lucene.Net.Analysis</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div> |
| <div class="line"><a name="l00025"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html"> 25</a></span>  <span class="keyword">public</span> sealed <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html" title="Emits the entire input as a single token.">KeywordTokenizer</a>:<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></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  {</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>  <span class="keyword">private</span> <span class="keyword">const</span> <span class="keywordtype">int</span> DEFAULT_BUFFER_SIZE = 256;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">private</span> <span class="keywordtype">bool</span> done;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> finalOffset;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">private</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;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">private</span> <a class="code" href="interface_lucene_1_1_net_1_1_analysis_1_1_tokenattributes_1_1_i_offset_attribute.html" title="The start and end character offset of a Token. ">IOffsetAttribute</a> offsetAtt;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div> |
| <div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#a423746f4ec5de24112109cda90962b82"> 35</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html" title="Emits the entire input as a single token.">KeywordTokenizer</a>(System.IO.TextReader input):this(input, DEFAULT_BUFFER_SIZE)</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  {</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  }</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</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_keyword_tokenizer.html#a0071eebe48412a5b27ebaa2fca5c6eb4"> 39</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html" title="Emits the entire input as a single token.">KeywordTokenizer</a>(System.IO.TextReader input, <span class="keywordtype">int</span> bufferSize):base(input)</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>  Init(bufferSize);</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  }</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#a978a10cf937c2850a7699d4f6357a250"> 44</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html" title="Emits the entire input as a single token.">KeywordTokenizer</a>(<a class="code" href="_char_tokenizer_8cs.html#aed60c4e663aea1a7dec59cf4c3710058">AttributeSource</a> source, System.IO.TextReader input, <span class="keywordtype">int</span> bufferSize):base(source, input)</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  {</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  Init(bufferSize);</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"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#aa3fb99956cc8a91796261295450c89b2"> 49</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html" title="Emits the entire input as a single token.">KeywordTokenizer</a>(<a class="code" href="class_lucene_1_1_net_1_1_util_1_1_attribute_source_1_1_attribute_factory.html" title="An AttributeFactory creates instances of Attributes.">AttributeFactory</a> factory, System.IO.TextReader input, <span class="keywordtype">int</span> bufferSize):base(factory, input)</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  Init(bufferSize);</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> Init(<span class="keywordtype">int</span> bufferSize)</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  {</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  this.done = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  termAtt = AddAttribute<ITermAttribute>();</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  offsetAtt = AddAttribute<IOffsetAttribute>();</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  termAtt.ResizeTermBuffer(bufferSize);</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div> |
| <div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#ac4e0336424543660beb924f2c091c94e"> 62</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> IncrementToken()</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (!done)</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  {</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  ClearAttributes();</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  done = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> upto = 0;</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">char</span>[] buffer = termAtt.TermBuffer();</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>)</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">int</span> length = input.Read(buffer, upto, buffer.Length - upto);</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">if</span> (length == 0)</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  upto += length;</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (upto == buffer.Length)</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  buffer = termAtt.ResizeTermBuffer(1 + buffer.Length);</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>  termAtt.SetTermLength(upto);</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  finalOffset = CorrectOffset(upto);</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  offsetAtt.SetOffset(CorrectOffset(0), finalOffset);</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div> |
| <div class="line"><a name="l00087"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#a7fe3d1d728eaf72091edb0646ea25942"> 87</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> End()</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">// set final offset </span></div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  offsetAtt.SetOffset(finalOffset, finalOffset);</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</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"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_keyword_tokenizer.html#af0e7b8c4d71a79011a45d6c8958b4ecb"> 93</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Reset(System.IO.TextReader input)</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>  base.Reset(input);</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  this.done = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> }</div> |
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