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<div class="title">ReciprocalFloatFunction.cs</div> </div>
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<a href="_reciprocal_float_function_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"> * 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>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment"> * (the &quot;License&quot;); you may not use this file except in compliance with</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<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>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<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>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<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>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<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>&#160;<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>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="keyword">using</span> Lucene.Net.Index;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="keyword">using</span> Lucene.Net.Search.Function;</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">namespace </span>Lucene.Net.Spatial.Util</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;{</div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html"> 24</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a> : <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_value_source.html" title="Expert: source of values for basic function queries. At its default/simplest form, values - one per doc - are used as the score of that doc. Values are instantiated as DocValues for a particular reader. ValueSource implementations differ in RAM requirements: it would always be a factor of the number of documents, but for each document the number of bytes can be 1, 2, 4, or 8.">ValueSource</a></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; {</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a407ab755ef55abef78f6f49a6bc6b2c0"> 26</a></span>&#160; <span class="keyword">protected</span> readonly <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_value_source.html" title="Expert: source of values for basic function queries. At its default/simplest form, values - one per doc - are used as the score of that doc. Values are instantiated as DocValues for a particular reader. ValueSource implementations differ in RAM requirements: it would always be a factor of the number of documents, but for each document the number of bytes can be 1, 2, 4, or 8.">ValueSource</a> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a407ab755ef55abef78f6f49a6bc6b2c0">source</a>;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#acb4a137cfca7cf9d78b955fc721acb77"> 27</a></span>&#160; <span class="keyword">protected</span> readonly <span class="keywordtype">float</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#acb4a137cfca7cf9d78b955fc721acb77">m</a>;</div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a5188ff9ec1110859f3041c59fe286c45"> 28</a></span>&#160; <span class="keyword">protected</span> readonly <span class="keywordtype">float</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a5188ff9ec1110859f3041c59fe286c45">a</a>;</div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#aab930f4a31494846ab10e28de09028a0"> 29</a></span>&#160; <span class="keyword">protected</span> readonly <span class="keywordtype">float</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#aab930f4a31494846ab10e28de09028a0">b</a>;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a783848f9719754a89bd08ca8b5d30789"> 38</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a>(<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_value_source.html" title="Expert: source of values for basic function queries. At its default/simplest form, values - one per doc - are used as the score of that doc. Values are instantiated as DocValues for a particular reader. ValueSource implementations differ in RAM requirements: it would always be a factor of the number of documents, but for each document the number of bytes can be 1, 2, 4, or 8.">ValueSource</a> source, <span class="keywordtype">float</span> m, <span class="keywordtype">float</span> a, <span class="keywordtype">float</span> b)</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; this.source = source;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; this.m = m;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; this.a = a;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; this.b = b;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; }</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html"> 46</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html">FloatDocValues</a> : <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_doc_values.html" title="Expert: represents field values as different types. Normally created via a ValueSuorce for a particul...">DocValues</a></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keyword">private</span> readonly <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a> _enclosingInstance;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keyword">private</span> readonly <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_doc_values.html" title="Expert: represents field values as different types. Normally created via a ValueSuorce for a particul...">DocValues</a> vals;</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"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html#a28f4d5fd1f64e3c63f0dee5336591828"> 51</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html">FloatDocValues</a>(<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a> enclosingInstance, <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_doc_values.html" title="Expert: represents field values as different types. Normally created via a ValueSuorce for a particul...">DocValues</a> vals)</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; _enclosingInstance = enclosingInstance;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; this.vals = vals;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html#afa7eb1903c67793e806035607cf3a6bd"> 57</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">float</span> FloatVal(<span class="keywordtype">int</span> doc)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> _enclosingInstance.a / (_enclosingInstance.m * vals.FloatVal(doc) + _enclosingInstance.b);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html#aec2cecf1cb0949fb99f6adbf65909228"> 62</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">string</span> ToString(<span class="keywordtype">int</span> doc)</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">return</span> _enclosingInstance.a + <span class="stringliteral">&quot;/(&quot;</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; + _enclosingInstance.m + <span class="stringliteral">&quot;*float(&quot;</span> + vals.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_doc_values.html#aba8b75a083fcaa31365e3fd49bd7cb00" title="Return a string representation of a doc value, as reuired for Explanations.">ToString</a>(doc) + <span class="charliteral">&#39;)&#39;</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; + <span class="charliteral">&#39;+&#39;</span> + _enclosingInstance.b + <span class="charliteral">&#39;)&#39;</span>;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; }</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a471094f1f0def4ab13a093ad105968c9"> 70</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_function_1_1_doc_values.html" title="Expert: represents field values as different types. Normally created via a ValueSuorce for a particul...">DocValues</a> GetValues(<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_index_reader.html" title="IndexReader is an abstract class, providing an interface for accessing an index. Search of an index i...">IndexReader</a> reader)</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; var vals = source.GetValues(reader);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function_1_1_float_doc_values.html">FloatDocValues</a>(<span class="keyword">this</span>, vals);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; }</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;</div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a36c18d01a9d256376e570c99cb83b111"> 76</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">string</span> Description()</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">return</span> a + <span class="stringliteral">&quot;/(&quot;</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; + m + <span class="stringliteral">&quot;*float(&quot;</span> + source.Description() + <span class="stringliteral">&quot;)&quot;</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; + <span class="stringliteral">&quot;+&quot;</span> + b + <span class="charliteral">&#39;)&#39;</span>;</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;</div>
<div class="line"><a name="l00083"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#aca86209620bb266b4e95b1fc8b3418ce"> 83</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> Equals(<span class="keywordtype">object</span> o)</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keywordflow">if</span> (typeof(<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a>) != o.GetType()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; var other = (<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html">ReciprocalFloatFunction</a>)o;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordflow">return</span> this.m == other.m</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; &amp;&amp; this.a == other.a</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; &amp;&amp; this.b == other.b</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; &amp;&amp; this.source.Equals(other.source);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_util_1_1_reciprocal_float_function.html#a3f7e342f5d069e431ff0234a378d07ff"> 93</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">int</span> GetHashCode()</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordtype">int</span> h = (int) BitConverter.DoubleToInt64Bits(a) + (int) BitConverter.DoubleToInt64Bits(m);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; h ^= (h &lt;&lt; 13) | (int)((uint)h &gt;&gt; 20);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">return</span> h + ((int) BitConverter.DoubleToInt64Bits(b)) + source.GetHashCode();</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; }</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;}</div>
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