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| <div class="title">PrefixTreeStrategy.cs</div> </div> |
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| <a href="_prefix_tree_strategy_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="preprocessor">#if !NET35</span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span><span class="keyword">using</span> System.Collections.Concurrent;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#else</span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="keyword">using</span> Lucene.Net.Support.Compatibility;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#endif</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"></span><span class="keyword">using</span> System.Collections.Generic;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">using</span> Lucene.Net.Analysis;</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">using</span> Lucene.Net.Analysis.Tokenattributes;</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">using</span> Lucene.Net.Documents;</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">using</span> Lucene.Net.Search.Function;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">using</span> Lucene.Net.Spatial.Prefix.Tree;</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">using</span> Lucene.Net.Spatial.Queries;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">using</span> Lucene.Net.Spatial.Util;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">using</span> Spatial4n.Core.Shapes;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span>Lucene.Net.Spatial.Prefix</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> {</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html"> 40</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_spatial_1_1_prefix_1_1_prefix_tree_strategy.html" title="Abstract SpatialStrategy which provides common functionality for those Strategys which use SpatialPre...">PrefixTreeStrategy</a> : SpatialStrategy</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  {</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#a4954c14f81f0ab37de8bc852bce5340c"> 42</a></span>  <span class="keyword">protected</span> readonly <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree.html" title="A spatial Prefix Tree, or Trie, which decomposes shapes into prefixed strings at variable lengths cor...">SpatialPrefixTree</a> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#a4954c14f81f0ab37de8bc852bce5340c">grid</a>;</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">private</span> readonly IDictionary<String, PointPrefixTreeFieldCacheProvider> provider =</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">new</span> ConcurrentDictionary<string, PointPrefixTreeFieldCacheProvider>();</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div> |
| <div class="line"><a name="l00047"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#aa0faab7fd80557fbdc64d70b61bd5c81"> 47</a></span>  <span class="keyword">protected</span> <span class="keywordtype">int</span> defaultFieldValuesArrayLen = 2;</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#a40bf2b6dc6a0a6274671d7cc6b4f526d"> 48</a></span>  <span class="keyword">protected</span> <span class="keywordtype">double</span> distErrPct = SpatialArgs.DEFAULT_DISTERRPCT; <span class="comment">// [ 0 TO 0.5 ]</span></div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div> |
| <div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#acaac6b1490c70db09d7769add878c3b5"> 50</a></span>  <span class="keyword">protected</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html" title="Abstract SpatialStrategy which provides common functionality for those Strategys which use SpatialPre...">PrefixTreeStrategy</a>(<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree.html" title="A spatial Prefix Tree, or Trie, which decomposes shapes into prefixed strings at variable lengths cor...">SpatialPrefixTree</a> grid, String fieldName)</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  : base(grid.GetSpatialContext(), fieldName)</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  {</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  this.grid = grid;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">/* Used in the in-memory ValueSource as a default ArrayList length for this field's array of values, per doc. */</span></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div> |
| <div class="line"><a name="l00058"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#adcad93af6107c059682244f2a1c617d3"> 58</a></span>  <span class="keyword">public</span> <span class="keywordtype">void</span> SetDefaultFieldValuesArrayLen(<span class="keywordtype">int</span> defaultFieldValuesArrayLen)</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  {</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  this.defaultFieldValuesArrayLen = defaultFieldValuesArrayLen;</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  }</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div> |
| <div class="line"><a name="l00068"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#ae6b78fa6a4d7ed58f595902096b09aa8"> 68</a></span>  <span class="keyword">public</span> <span class="keywordtype">double</span> DistErrPct { <span class="keyword">get</span>; <span class="keyword">set</span>; }</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </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_prefix_1_1_prefix_tree_strategy.html#ae759af89fa1f2374481dba516f7ca1b8"> 70</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_abstract_field.html">AbstractField</a>[] CreateIndexableFields(Shape shape)</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">double</span> distErr = SpatialArgs.CalcDistanceFromErrPct(shape, distErrPct, ctx);</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> CreateIndexableFields(shape, distErr);</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </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_prefix_1_1_prefix_tree_strategy.html#af40c1b07e27348270924594d7866a2ea"> 76</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_abstract_field.html">AbstractField</a>[] CreateIndexableFields(Shape shape, <span class="keywordtype">double</span> distErr)</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  {</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordtype">int</span> detailLevel = grid.GetLevelForDistance(distErr);</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  var cells = grid.GetNodes(shape, detailLevel, <span class="keyword">true</span>);<span class="comment">//true=intermediates cells</span></div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">//If shape isn't a point, add a full-resolution center-point so that</span></div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// PointPrefixTreeFieldCacheProvider has the center-points.</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// TODO index each center of a multi-point? Yes/no?</span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">if</span> (!(shape is Point))</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  {</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  Point ctr = shape.GetCenter();</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">//TODO should be smarter; don't index 2 tokens for this in CellTokenStream. Harmless though.</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  cells.Add(grid.GetNodes(ctr, grid.GetMaxLevels(), <span class="keyword">false</span>)[0]);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">//TODO is CellTokenStream supposed to be re-used somehow? see Uwe's comments:</span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// http://code.google.com/p/lucene-spatial-playground/issues/detail?id=4</span></div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_abstract_field.html">AbstractField</a>[]</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  {</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">new</span> <a class="code" href="namespace_spell_checker_1_1_net_1_1_search_1_1_spell.html#a844ec5ef528538a3dc0e6cbb34c5e698">Field</a>(GetFieldName(), <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html" title="Outputs the tokenString of a cell, and if its a leaf, outputs it again with the leaf byte...">CellTokenStream</a>(cells.GetEnumerator()))</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  {OmitNorms = <span class="keyword">true</span>, OmitTermFreqAndPositions = <span class="keyword">true</span>}</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  };</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div> |
| <div class="line"><a name="l00103"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html"> 103</a></span>  <span class="keyword">protected</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html" title="Outputs the tokenString of a cell, and if its a leaf, outputs it again with the leaf byte...">CellTokenStream</a> : <a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_token_stream.html" title="A TokenStream enumerates the sequence of tokens, either from Fields of a Document or from query text...">TokenStream</a></div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <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="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">private</span> readonly IEnumerator<Node> iter;</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div> |
| <div class="line"><a name="l00108"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html#a2dd833059d35ef1e9bd50859462e4566"> 108</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html" title="Outputs the tokenString of a cell, and if its a leaf, outputs it again with the leaf byte...">CellTokenStream</a>(IEnumerator<Node> tokens)</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  {</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  this.iter = tokens;</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  Init();</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> Init()</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  {</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  termAtt = AddAttribute<ITermAttribute>();</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  }</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">private</span> <span class="keywordtype">string</span> nextTokenStringNeedingLeaf;</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div> |
| <div class="line"><a name="l00121"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html#a4dc7b1c6504cfb491c21511a8b302741"> 121</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> IncrementToken()</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  {</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  ClearAttributes();</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (nextTokenStringNeedingLeaf != null)</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  {</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  termAtt.Append(nextTokenStringNeedingLeaf);</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  termAtt.Append((<span class="keywordtype">char</span>)<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a>.<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html#a3e8fe775a1f05d275d99bf23bfbed459">LEAF_BYTE</a>);</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  nextTokenStringNeedingLeaf = null;</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (iter.MoveNext())</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html">Node</a> cell = iter.Current;</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  var token = cell.<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html#a390f1795a9c39889cbd96752e5a4f1b3">GetTokenString</a>();</div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  termAtt.Append(token);</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">if</span> (cell.<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_node.html#a954b33a23b744cd75a689ef04918d91e">IsLeaf</a>())</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  nextTokenStringNeedingLeaf = token;</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div> |
| <div class="line"><a name="l00143"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy_1_1_cell_token_stream.html#afd17b88f187ab00434c45dad4cfeb04d"> 143</a></span>  <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  {</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div> |
| <div class="line"><a name="l00148"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#af9e89cdfa4b96f71d5f74f2a7f49c0f7"> 148</a></span>  <span class="keyword">public</span> ShapeFieldCacheProvider<Point> GetCacheProvider()</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  {</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_point_prefix_tree_field_cache_provider.html" title="Implementation of ShapeFieldCacheProvider designed for PrefixTreeStrategys.">PointPrefixTreeFieldCacheProvider</a> p;</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (!provider.TryGetValue(GetFieldName(), out p) || p == null)</div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  {</div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  lock (<span class="keyword">this</span>)</div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  {<span class="comment">//double checked locking idiom is okay since provider is threadsafe</span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (!provider.ContainsKey(GetFieldName()))</div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  {</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  p = <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_point_prefix_tree_field_cache_provider.html" title="Implementation of ShapeFieldCacheProvider designed for PrefixTreeStrategys.">PointPrefixTreeFieldCacheProvider</a>(grid, GetFieldName(), defaultFieldValuesArrayLen);</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  provider[GetFieldName()] = p;</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> p;</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div> |
| <div class="line"><a name="l00165"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#a0b18c34206015ff60bfe6b381e06e772"> 165</a></span>  <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_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> MakeDistanceValueSource(Point queryPoint)</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  var p = (<a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_point_prefix_tree_field_cache_provider.html" title="Implementation of ShapeFieldCacheProvider designed for PrefixTreeStrategys.">PointPrefixTreeFieldCacheProvider</a>)GetCacheProvider();</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <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_shape_field_cache_distance_value_source.html" title="An implementation of the Lucene ValueSource model to support spatial relevance ranking. ">ShapeFieldCacheDistanceValueSource</a>(ctx, p, queryPoint);</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div> |
| <div class="line"><a name="l00171"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_prefix_tree_strategy.html#a3235a13f76cfb6a27c59382a755bdee1"> 171</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_spatial_1_1_prefix_1_1_tree_1_1_spatial_prefix_tree.html" title="A spatial Prefix Tree, or Trie, which decomposes shapes into prefixed strings at variable lengths cor...">SpatialPrefixTree</a> GetGrid()</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  {</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> grid;</div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div> |
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