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|  <span id="projectnumber">3.0.3</span> |
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| <li class="navelem"><a class="el" href="dir_1efe588324fc547683bba4a3f1bac847.html">core</a></li><li class="navelem"><a class="el" href="dir_56f9b3c34a852b92179da152ee78b823.html">Search</a></li> </ul> |
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| <a href="_similarity_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* </span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * limitations under the License.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using</span> System;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">using</span> System.Collections.Generic;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">using</span> Lucene.Net.Documents;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_similarity_8cs.html#a7e48939924d26d58803de390e852a01c"> 21</a></span> <span class="keyword">using</span> <a class="code" href="_fieldable_8cs.html#a7e48939924d26d58803de390e852a01c">FieldInvertState</a> = Lucene.Net.Index.FieldInvertState;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"><a class="code" href="_similarity_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9"> 22</a></span> <span class="keyword">using</span> <a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a> = Lucene.Net.Index.Term;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="_similarity_8cs.html#af06af40d401c89bd4480e52328f1413b"> 23</a></span> <span class="keyword">using</span> <a class="code" href="_similarity_8cs.html#af06af40d401c89bd4480e52328f1413b">SmallFloat</a> = Lucene.Net.Util.SmallFloat;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="_similarity_8cs.html#a6210369909e0fef392bc63926b45beaf"> 24</a></span> <span class="keyword">using</span> <a class="code" href="_phrase_query_8cs.html#a6210369909e0fef392bc63926b45beaf">IDFExplanation</a> = Lucene.Net.Search.Explanation.IDFExplanation;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">namespace </span>Lucene.Net.Search</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="l00292"></a><span class="lineno"> 292</span>  [Serializable]</div> |
| <div class="line"><a name="l00293"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html"> 293</a></span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a></div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  {</div> |
| <div class="line"><a name="l00295"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a6d67e665ab410e69b7cfbf3a941e53dd"> 295</a></span>  <span class="keyword">protected</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a>()</div> |
| <div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  {</div> |
| <div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  InitBlock();</div> |
| <div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div> |
| <div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  [Serializable]</div> |
| <div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">private</span> <span class="keyword">class </span>AnonymousClassIDFExplanation1:<a class="code" href="_phrase_query_8cs.html#a6210369909e0fef392bc63926b45beaf">IDFExplanation</a></div> |
| <div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  {</div> |
| <div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">public</span> AnonymousClassIDFExplanation1(<span class="keywordtype">int</span> df, <span class="keywordtype">int</span> max, <span class="keywordtype">float</span> idf, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a> enclosingInstance)</div> |
| <div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  {</div> |
| <div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  InitBlock(df, max, idf, enclosingInstance);</div> |
| <div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  }</div> |
| <div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock(<span class="keywordtype">int</span> df, <span class="keywordtype">int</span> max, <span class="keywordtype">float</span> idf, <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> enclosingInstance)</div> |
| <div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  {</div> |
| <div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  this.df = df;</div> |
| <div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  this.max = max;</div> |
| <div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  this.idf = idf;</div> |
| <div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  this.enclosingInstance = enclosingInstance;</div> |
| <div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  }</div> |
| <div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> df;</div> |
| <div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> max;</div> |
| <div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keyword">private</span> <span class="keywordtype">float</span> idf;</div> |
| <div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keyword">private</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> enclosingInstance;</div> |
| <div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keyword">public</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> Enclosing_Instance</div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  {</div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keyword">get</span></div> |
| <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  {</div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">return</span> enclosingInstance;</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  }</div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  </div> |
| <div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div> |
| <div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="comment">//@Override</span></div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">public</span> <span class="keyword">override</span> System.String Explain()</div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  {</div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> <span class="stringliteral">"idf(docFreq="</span> + df + <span class="stringliteral">", maxDocs="</span> + max + <span class="stringliteral">")"</span>;</div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="comment">//@Override</span></div> |
| <div class="line"><a name="l00331"></a><span class="lineno"> 331</span> </div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">float</span> Idf</div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  {</div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> idf; }</div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  [Serializable]</div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">private</span> <span class="keyword">class </span>AnonymousClassIDFExplanation3:<a class="code" href="_phrase_query_8cs.html#a6210369909e0fef392bc63926b45beaf">IDFExplanation</a></div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  {</div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keyword">public</span> AnonymousClassIDFExplanation3(<span class="keywordtype">float</span> fIdf, System.Text.StringBuilder exp, <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> enclosingInstance)</div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  {</div> |
| <div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  InitBlock(fIdf, exp, enclosingInstance);</div> |
| <div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div> |
| <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock(<span class="keywordtype">float</span> fIdf, System.Text.StringBuilder exp, <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> enclosingInstance)</div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  {</div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  this.fIdf = fIdf;</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  this.exp = exp;</div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  this.enclosingInstance = enclosingInstance;</div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  }</div> |
| <div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keyword">private</span> <span class="keywordtype">float</span> fIdf;</div> |
| <div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keyword">private</span> System.Text.StringBuilder exp;</div> |
| <div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keyword">private</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> enclosingInstance;</div> |
| <div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keyword">public</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> Enclosing_Instance</div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  {</div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keyword">get</span></div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  {</div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">return</span> enclosingInstance;</div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  }</div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  </div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  }</div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="comment">//@Override</span></div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">float</span> Idf</div> |
| <div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  {</div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> fIdf; }</div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  }</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="comment">//@Override</span></div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keyword">public</span> <span class="keyword">override</span> System.String Explain()</div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  {</div> |
| <div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">return</span> exp.ToString();</div> |
| <div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  }</div> |
| <div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  }</div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock()</div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  {</div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  </div> |
| <div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keyword">private</span> <span class="keyword">static</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a> defaultImpl = <span class="keyword">new</span> <a class="code" href="_more_like_this_8cs.html#a7ad608bafa9687ad12fc944e1f4f001f">DefaultSimilarity</a>();</div> |
| <div class="line"><a name="l00381"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a7179ebc4356c719c153df4f93f56800e"> 381</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">int</span> NO_DOC_ID_PROVIDED = - 1;</div> |
| <div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html" title="Expert: Scoring API. Subclasses implement search scoring.">Similarity</a> Default</div> |
| <div class="line"><a name="l00392"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a374d891e671bbaca17d776be505bc944"> 392</a></span>  {</div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> defaultImpl; }</div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keyword">set</span> { defaultImpl = value; }</div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span> </div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keyword">private</span> <span class="keyword">static</span> readonly <span class="keywordtype">float</span>[] NORM_TABLE = <span class="keyword">new</span> <span class="keywordtype">float</span>[256];</div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  </div> |
| <div class="line"><a name="l00403"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#acd2a4329c78ea23877a82c425fe76188"> 403</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">float</span> DecodeNorm(byte b)</div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  {</div> |
| <div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">return</span> NORM_TABLE[b & 0xFF]; <span class="comment">// & 0xFF maps negative bytes to positive above 127</span></div> |
| <div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  }</div> |
| <div class="line"><a name="l00407"></a><span class="lineno"> 407</span> </div> |
| <div class="line"><a name="l00411"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#ad157cc6f3b9070ecd1691d4ffde1eb4b"> 411</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">float</span>[] GetNormDecoder()</div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  {</div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">return</span> NORM_TABLE;</div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div> |
| <div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div> |
| <div class="line"><a name="l00437"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#accbd724f439b07b64379b590bcd2ba81"> 437</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">float</span> ComputeNorm(System.String field, <a class="code" href="_fieldable_8cs.html#a7e48939924d26d58803de390e852a01c">FieldInvertState</a> state)</div> |
| <div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  {</div> |
| <div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">return</span> (<span class="keywordtype">float</span>) (state.Boost * LengthNorm(field, state.Length));</div> |
| <div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  }</div> |
| <div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  </div> |
| <div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> LengthNorm(System.String fieldName, <span class="keywordtype">int</span> numTokens);</div> |
| <div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  </div> |
| <div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> QueryNorm(<span class="keywordtype">float</span> sumOfSquaredWeights);</div> |
| <div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  </div> |
| <div class="line"><a name="l00498"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#abb8c94a5e3079a47004af1bf117af1de"> 498</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> byte EncodeNorm(<span class="keywordtype">float</span> f)</div> |
| <div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  {</div> |
| <div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">return</span> (byte) <a class="code" href="_similarity_8cs.html#af06af40d401c89bd4480e52328f1413b">SmallFloat</a>.FloatToByte315(f);</div> |
| <div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  }</div> |
| <div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  </div> |
| <div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  </div> |
| <div class="line"><a name="l00521"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#ab08940fe117d42b282f342a09b6beba9"> 521</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">float</span> Tf(<span class="keywordtype">int</span> freq)</div> |
| <div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  {</div> |
| <div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">return</span> Tf((<span class="keywordtype">float</span>) freq);</div> |
| <div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  }</div> |
| <div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  </div> |
| <div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> SloppyFreq(<span class="keywordtype">int</span> distance);</div> |
| <div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  </div> |
| <div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> Tf(<span class="keywordtype">float</span> freq);</div> |
| <div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  </div> |
| <div class="line"><a name="l00582"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a9bfd3c3d2722ff351f7c5793f0ece506"> 582</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <a class="code" href="_phrase_query_8cs.html#a6210369909e0fef392bc63926b45beaf">IDFExplanation</a> IdfExplain(<a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a> term, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_searcher.html" title="An abstract base class for search implementations. Implements the main search methods.">Searcher</a> searcher)</div> |
| <div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  {</div> |
| <div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordtype">int</span> df = searcher.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_searcher.html#a1a9a74d509b4531b52c11d6678c50259" title="Expert: Returns the number of documents containing term. Called by search code to compute term weight...">DocFreq</a>(term);</div> |
| <div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  <span class="keywordtype">int</span> max = searcher.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_searcher.html#a1dbf54a65f094a455860a8119cbed4e0">MaxDoc</a>;</div> |
| <div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordtype">float</span> idf2 = Idf(df, max);</div> |
| <div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> AnonymousClassIDFExplanation1(df, max, idf2, <span class="keyword">this</span>);</div> |
| <div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  }</div> |
| <div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  </div> |
| <div class="line"><a name="l00606"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#acaefd61909f04a234baaec33d387e64e"> 606</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <a class="code" href="_phrase_query_8cs.html#a6210369909e0fef392bc63926b45beaf">IDFExplanation</a> IdfExplain(ICollection<Term> terms, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_searcher.html" title="An abstract base class for search implementations. Implements the main search methods.">Searcher</a> searcher)</div> |
| <div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  {</div> |
| <div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keywordtype">int</span> max = searcher.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_searcher.html#a1dbf54a65f094a455860a8119cbed4e0">MaxDoc</a>;</div> |
| <div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keywordtype">float</span> idf2 = 0.0f;</div> |
| <div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  System.Text.StringBuilder exp = <span class="keyword">new</span> System.Text.StringBuilder();</div> |
| <div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <span class="keywordflow">foreach</span> (<a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a> term <span class="keywordflow">in</span> terms)</div> |
| <div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  {</div> |
| <div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keywordtype">int</span> df = searcher.DocFreq(term);</div> |
| <div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  idf2 += Idf(df, max);</div> |
| <div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  exp.Append(<span class="stringliteral">" "</span>);</div> |
| <div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  exp.Append(term.Text);</div> |
| <div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  exp.Append(<span class="stringliteral">"="</span>);</div> |
| <div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  exp.Append(df);</div> |
| <div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  }</div> |
| <div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordtype">float</span> fIdf = idf2;</div> |
| <div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> AnonymousClassIDFExplanation3(fIdf, exp, <span class="keyword">this</span>);</div> |
| <div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  }</div> |
| <div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  </div> |
| <div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> Idf(<span class="keywordtype">int</span> docFreq, <span class="keywordtype">int</span> numDocs);</div> |
| <div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  </div> |
| <div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <span class="keyword">public</span> <span class="keyword">abstract</span> <span class="keywordtype">float</span> Coord(<span class="keywordtype">int</span> overlap, <span class="keywordtype">int</span> maxOverlap);</div> |
| <div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  </div> |
| <div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  </div> |
| <div class="line"><a name="l00684"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_similarity.html#a5973cd115b539d631e994fdf86021439"> 684</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">float</span> ScorePayload(<span class="keywordtype">int</span> docId, System.String fieldName, <span class="keywordtype">int</span> start, <span class="keywordtype">int</span> end, byte[] payload, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> length)</div> |
| <div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  {</div> |
| <div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="keywordflow">return</span> 1;</div> |
| <div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  }</div> |
| <div class="line"><a name="l00688"></a><span class="lineno"> 688</span> </div> |
| <div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="keyword">static</span> <a class="code" href="_documents_writer_8cs.html#a5431a3a4edd067eec50ca39b5ea99c31">Similarity</a>()</div> |
| <div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  {</div> |
| <div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  {</div> |
| <div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 256; i++)</div> |
| <div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  NORM_TABLE[i] = <a class="code" href="_similarity_8cs.html#af06af40d401c89bd4480e52328f1413b">SmallFloat</a>.Byte315ToFloat((byte) i);</div> |
| <div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  }</div> |
| <div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  }</div> |
| <div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  }</div> |
| <div class="line"><a name="l00697"></a><span class="lineno"> 697</span> }</div> |
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