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<div class="title">TermRangeTermEnum.cs</div> </div>
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<a href="_term_range_term_enum_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;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_term_range_term_enum_8cs.html#a2a6914ea10bbe06764856e29e5674e66"> 20</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_more_like_this_8cs.html#a2a6914ea10bbe06764856e29e5674e66">IndexReader</a> = Lucene.Net.Index.IndexReader;</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_term_range_term_enum_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9"> 21</a></span>&#160;<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="l00022"></a><span class="lineno"><a class="code" href="_term_range_term_enum_8cs.html#a91d1d7626bdff1c6780b0307ad58348e"> 22</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_abstract_field_8cs.html#a91d1d7626bdff1c6780b0307ad58348e">StringHelper</a> = Lucene.Net.Util.StringHelper;</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"> 24</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Search</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"> 26</span>&#160; </div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html"> 35</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html" title="Subclass of FilteredTermEnum for enumerating all terms that match the specified range parameters...">TermRangeTermEnum</a>:<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_filtered_term_enum.html" title="Abstract class for enumerating a subset of all terms. Term enumerations are always ordered by Term...">FilteredTermEnum</a></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keyword">private</span> System.Globalization.CompareInfo collator = null;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> endEnum = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keyword">private</span> System.String field;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">private</span> System.String upperTermText;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keyword">private</span> System.String lowerTermText;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> includeLower;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> includeUpper;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; </div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html#a58d51855c000f26bbab30f0d861e4b74"> 73</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html" title="Subclass of FilteredTermEnum for enumerating all terms that match the specified range parameters...">TermRangeTermEnum</a>(<a class="code" href="_more_like_this_8cs.html#a2a6914ea10bbe06764856e29e5674e66">IndexReader</a> reader, System.String field, System.String lowerTermText, System.String upperTermText, <span class="keywordtype">bool</span> includeLower, <span class="keywordtype">bool</span> includeUpper, System.Globalization.CompareInfo collator)</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; this.collator = collator;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; this.upperTermText = upperTermText;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; this.lowerTermText = lowerTermText;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; this.includeLower = includeLower;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; this.includeUpper = includeUpper;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; this.field = <a class="code" href="_abstract_field_8cs.html#a91d1d7626bdff1c6780b0307ad58348e">StringHelper</a>.Intern(field);</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">// do a little bit of normalization...</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">// open ended range queries should always be inclusive.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">if</span> (this.lowerTermText == null)</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; this.lowerTermText = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; this.includeLower = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; }</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keywordflow">if</span> (this.upperTermText == null)</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; this.includeUpper = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; }</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; System.String startTermText = collator == null?this.lowerTermText:<span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; SetEnum(reader.Terms(<span class="keyword">new</span> <a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a>(this.field, startTermText)));</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; }</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"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html#a54ff13fa008b60e7c9ee04d8ea7d4138"> 99</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">float</span> Difference()</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordflow">return</span> 1.0f;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; }</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; </div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_term_enum.html#a2933fcc69df127e3d494a01ae458975d"> 104</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> EndEnum()</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordflow">return</span> endEnum;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> TermCompare(<a class="code" href="_more_like_this_8cs.html#a8797eb30ce21b31829d3e3a43a20e3b9">Term</a> term)</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; {</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <span class="keywordflow">if</span> (collator == null)</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="comment">// Use Unicode code point ordering</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordtype">bool</span> checkLower = !includeLower;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="keywordflow">if</span> (term != null &amp;&amp; (System.Object) term.Field == (System.Object) field)</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="comment">// interned comparison</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="keywordflow">if</span> (!checkLower || null == lowerTermText || String.CompareOrdinal(term.Text, lowerTermText) &gt; 0)</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; checkLower = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">if</span> (upperTermText != null)</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="keywordtype">int</span> compare = String.CompareOrdinal(upperTermText, term.Text);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;<span class="comment"> * if beyond the upper term, or is exclusive and this is equal to</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="comment"> * the upper term, break out</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="keywordflow">if</span> ((compare &lt; 0) || (!includeUpper &amp;&amp; compare == 0))</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; endEnum = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</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; }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keywordflow">else</span></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"> 139</span>&#160; <span class="comment">// break</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; endEnum = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</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"> 145</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; {</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordflow">if</span> (term != null &amp;&amp; (System.Object) term.Field == (System.Object) field)</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="comment">// interned comparison</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <span class="keywordflow">if</span> ((lowerTermText == null || (includeLower?collator.Compare(term.Text.ToString(), lowerTermText.ToString()) &gt;= 0:collator.Compare(term.Text.ToString(), lowerTermText.ToString()) &gt; 0)) &amp;&amp; (upperTermText == null || (includeUpper?collator.Compare(term.Text.ToString(), upperTermText.ToString()) &lt;= 0:collator.Compare(term.Text.ToString(), upperTermText.ToString()) &lt; 0)))</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; {</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; }</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; endEnum = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; }</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; }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;}</div>
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