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<div class="title">CJKTokenizer.cs</div> </div>
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<a href="_c_j_k_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>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * under the License.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">using</span> System.Globalization;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">using</span> System.IO;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">using</span> System.Text;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="keyword">using</span> System.Text.RegularExpressions;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="keyword">using</span> Lucene.Net.Analysis;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="keyword">using</span> Lucene.Net.Analysis.Tokenattributes;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="keyword">using</span> Lucene.Net.Util;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Analysis.CJK</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;{</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_c_j_k_1_1_c_j_k_tokenizer.html"> 49</a></span>&#160; <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_c_j_k_1_1_c_j_k_tokenizer.html">CJKTokenizer</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="l00050"></a><span class="lineno"> 50</span>&#160; {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="comment">//~ Static fields/initializers ---------------------------------------------</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="comment"></span> <span class="keyword">internal</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> WORD_TYPE = 0;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">internal</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> SINGLE_TOKEN_TYPE = 1;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keyword">internal</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> DOUBLE_TOKEN_TYPE = 2;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keyword">internal</span> <span class="keyword">static</span> readonly String[] TOKEN_TYPE_NAMES = { <span class="stringliteral">&quot;word&quot;</span>, <span class="stringliteral">&quot;single&quot;</span>, <span class="stringliteral">&quot;double&quot;</span> };</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">internal</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> MAX_WORD_LEN = 255;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">internal</span> <span class="keyword">static</span> readonly <span class="keywordtype">int</span> IO_BUFFER_SIZE = 256;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">//~ Instance fields --------------------------------------------------------</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> offset = 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> bufferIndex = 0;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> dataLen = 0;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keyword">private</span> <span class="keywordtype">char</span>[] buffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[MAX_WORD_LEN];</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="keyword">private</span> <span class="keywordtype">char</span>[] ioBuffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[IO_BUFFER_SIZE];</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> tokenType = WORD_TYPE;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <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="l00124"></a><span class="lineno"> 124</span>&#160; <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="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keyword">private</span> <a class="code" href="interface_lucene_1_1_net_1_1_analysis_1_1_tokenattributes_1_1_i_type_attribute.html" title="A Token&#39;s lexical type. The Default value is &quot;word&quot;. ">ITypeAttribute</a> typeAtt;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="comment">//~ Constructors -----------------------------------------------------------</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#a05cce877f2a69b444f134cde3797b71b"> 133</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html">CJKTokenizer</a>(TextReader _in)</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; : base(_in)</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; Init();</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#ad49bdf889a750469318d6af800b8faa4"> 139</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html">CJKTokenizer</a>(<a class="code" href="class_lucene_1_1_net_1_1_util_1_1_attribute_source.html" title="An AttributeSource contains a list of different Attributes, and methods to add and get them...">AttributeSource</a> source, TextReader _in)</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; : base(source, _in)</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; Init();</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; }</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;</div>
<div class="line"><a name="l00145"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#a0376000d55f2609de7964d00120b2f47"> 145</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html">CJKTokenizer</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, TextReader _in)</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; : base(factory, _in)</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; Init();</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; }</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> Init()</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; {</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; termAtt = AddAttribute&lt;ITermAttribute&gt;();</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; offsetAtt = AddAttribute&lt;IOffsetAttribute&gt;();</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; typeAtt = AddAttribute&lt;ITypeAttribute&gt;();</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="comment">//~ Methods ----------------------------------------------------------------</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;<span class="comment"> * Returns true for the next token in the stream, or false at EOS.</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;<span class="comment"> * See http://java.sun.com/j2se/1.3/docs/api/java/lang/char.UnicodeBlock.html</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;<span class="comment"> * for detail.</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;<span class="comment"> * @return false for end of stream, true otherwise</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<span class="comment"> * @throws java.io.IOException - throw IOException when read error &lt;br&gt;</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;<span class="comment"> * happened in the InputStream</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; Regex isBasicLatin = <span class="keyword">new</span> Regex(<span class="stringliteral">@&quot;\p{IsBasicLatin}&quot;</span>, RegexOptions.Compiled);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; Regex isHalfWidthAndFullWidthForms = <span class="keyword">new</span> Regex(<span class="stringliteral">@&quot;\p{IsHalfwidthandFullwidthForms}&quot;</span>, RegexOptions.Compiled);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;</div>
<div class="line"><a name="l00175"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#aa46cb44252e78e985bb596b9871c168d"> 175</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> IncrementToken()</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; ClearAttributes();</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; <span class="comment">/* how many character(s) has been stored in buffer */</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; <span class="keywordflow">while</span> (<span class="keyword">true</span>)</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; {</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="comment">// loop until we find a non-empty token</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; <span class="keywordtype">int</span> length = 0;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="comment">/* the position used to create Token */</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordtype">int</span> start = offset;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="keywordflow">while</span> (<span class="keyword">true</span>)</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; {</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="comment">// loop until we&#39;ve found a full token</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="comment">/* current character */</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="keywordtype">char</span> c;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; offset++;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="keywordflow">if</span> (bufferIndex &gt;= dataLen)</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; dataLen = input.Read(ioBuffer, 0, ioBuffer.Length);</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; bufferIndex = 0;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; }</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <span class="keywordflow">if</span> (dataLen == 0) <span class="comment">// input.Read returns 0 when its empty, not -1, as in java</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keywordflow">if</span> (length &gt; 0)</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; {</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keywordflow">if</span> (preIsTokened == <span class="keyword">true</span>)</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; {</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; length = 0;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; {</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; offset--;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; {</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; offset--;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; }</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; }</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; {</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; <span class="comment">//get current character</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; c = ioBuffer[bufferIndex++];</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="comment">//TODO: Using a Regex to determine the UnicodeCategory is probably slower than</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="comment">// If we just created a small class that would look it up for us, which </span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="comment">// would likely be trivial, however time-consuming. I can&#39;t imagine a Regex</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="comment">// being fast for this, considering we have to pull a char from the buffer,</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="comment">// and convert it to a string before we run a regex on it. - cc</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="keywordtype">bool</span> isHalfFullForm = isHalfWidthAndFullWidthForms.Match(c.ToString()).Success;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="comment">//if the current character is ASCII or Extend ASCII</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="keywordflow">if</span> ((isBasicLatin.Match(c.ToString()).Success) || (isHalfFullForm))</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; {</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; <span class="keywordflow">if</span> (isHalfFullForm)</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="keywordtype">int</span> i = (int) c;</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; <span class="keywordflow">if</span> (i &gt;= 65281 &amp;&amp; i &lt;= 65374)</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; <span class="comment">// convert certain HALFWIDTH_AND_FULLWIDTH_FORMS to BASIC_LATIN</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; i = i - 65248;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; c = (char) i;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; }</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; <span class="comment">// if the current character is a letter or &quot;_&quot; &quot;+&quot; &quot;#&quot;</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">char</span>.IsLetterOrDigit(c)</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; || ((c == <span class="charliteral">&#39;_&#39;</span>) || (c == <span class="charliteral">&#39;+&#39;</span>) || (c == <span class="charliteral">&#39;#&#39;</span>))</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; )</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="keywordflow">if</span> (length == 0)</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; {</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="comment">// &quot;javaC1C2C3C4linux&quot; &lt;br&gt;</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <span class="comment">// ^--: the current character begin to token the ASCII</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="comment">// letter</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; start = offset - 1;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (tokenType == DOUBLE_TOKEN_TYPE)</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; <span class="comment">// &quot;javaC1C2C3C4linux&quot; &lt;br&gt;</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="comment">// ^--: the previous non-ASCII</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; <span class="comment">// : the current character</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; offset--;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; bufferIndex--;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; <span class="keywordflow">if</span> (preIsTokened == <span class="keyword">true</span>)</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; {</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; <span class="comment">// there is only one non-ASCII has been stored</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; length = 0;</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; }</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; {</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; }</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; }</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160;</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; <span class="comment">// store the LowerCase(c) in the buffer</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; buffer[length++] = <span class="keywordtype">char</span>.ToLower(c); <span class="comment">// TODO: is java invariant? If so, this should be ToLowerInvariant()</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; tokenType = SINGLE_TOKEN_TYPE;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; <span class="comment">// break the procedure if buffer overflowed!</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; <span class="keywordflow">if</span> (length == MAX_WORD_LEN)</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; {</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (length &gt; 0)</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; {</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; <span class="keywordflow">if</span> (preIsTokened)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; {</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; length = 0;</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; }</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; }</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; <span class="comment">// non-ASCII letter, e.g.&quot;C1C2C3C4&quot;</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; <span class="keywordflow">if</span> (<span class="keywordtype">char</span>.IsLetter(c))</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; {</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; <span class="keywordflow">if</span> (length == 0)</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; {</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; start = offset - 1;</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; buffer[length++] = c;</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; tokenType = DOUBLE_TOKEN_TYPE;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; {</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; <span class="keywordflow">if</span> (tokenType == SINGLE_TOKEN_TYPE)</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; {</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; offset--;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; bufferIndex--;</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; <span class="comment">//return the previous ASCII characters</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; }</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; buffer[length++] = c;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; tokenType = DOUBLE_TOKEN_TYPE;</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160;</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; <span class="keywordflow">if</span> (length == 2)</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; {</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; offset--;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; bufferIndex--;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; preIsTokened = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; }</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; }</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; }</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; }</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (length &gt; 0)</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; {</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; <span class="keywordflow">if</span> (preIsTokened == <span class="keyword">true</span>)</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160; {</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <span class="comment">// empty the buffer</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; length = 0;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; }</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160; {</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160; <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160; }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160; }</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160; }</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160; }</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160;</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>&#160; <span class="keywordflow">if</span> (length &gt; 0)</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160; {</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160; termAtt.SetTermBuffer(buffer, 0, length);</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; offsetAtt.SetOffset(CorrectOffset(start), CorrectOffset(start + length));</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160; typeAtt.Type = TOKEN_TYPE_NAMES[tokenType];</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160; }</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (dataLen == 0)</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>&#160; {</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>&#160; offset--;</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>&#160; }</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>&#160;</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>&#160; <span class="comment">// Cycle back and try for the next token (don&#39;t</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>&#160; <span class="comment">// return an empty string)</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>&#160; }</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160; }</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160;</div>
<div class="line"><a name="l00378"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#a55ad7de33684568bb2efa01d1227201c"> 378</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> End()</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160; {</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160; <span class="comment">// set final offset</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160; <span class="keywordtype">int</span> finalOffset = CorrectOffset(offset);</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160; this.offsetAtt.SetOffset(finalOffset, finalOffset);</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160; }</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160;</div>
<div class="line"><a name="l00385"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#a1d0d74b6294c8bfe0a4dd1582a2e8e34"> 385</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Reset()</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160; {</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160; base.Reset();</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>&#160; offset = bufferIndex = dataLen = 0;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>&#160; preIsTokened = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>&#160; tokenType = WORD_TYPE;</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>&#160; }</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>&#160;</div>
<div class="line"><a name="l00393"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_c_j_k_1_1_c_j_k_tokenizer.html#a82aa31cc0c4a75c6900cfda7249e22ea"> 393</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Reset(TextReader reader)</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>&#160; {</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>&#160; base.Reset(reader);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>&#160; Reset();</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>&#160; }</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>&#160; }</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>&#160;}</div>
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