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<div class="title">DateField.cs</div> </div>
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<a href="_date_field_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.Search;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="keyword">using</span> Lucene.Net.Support;</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_date_field_8cs.html#a35ee450e1da1e0bf32b70e5018cc9e5e"> 21</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_numeric_token_stream_8cs.html#a35ee450e1da1e0bf32b70e5018cc9e5e">NumericUtils</a> = Lucene.Net.Util.NumericUtils;</div>
<div class="line"><a name="l00022"></a><span class="lineno"><a class="code" href="_date_field_8cs.html#afc61f86ed2982a0f4a99615147046083"> 22</a></span>&#160;<span class="keyword">using</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_prefix_query.html" title="A Query that matches documents containing terms with a specified prefix. A PrefixQuery is built by Qu...">PrefixQuery</a> = Lucene.Net.Search.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_prefix_query.html#a4dc9697e6c5b14ce23366ecc2e7ca799" title="Constructs a query for terms starting with prefix. ">PrefixQuery</a>;</div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="_date_field_8cs.html#a75d10c703a17be3762e29a6abbf4f85b"> 23</a></span>&#160;<span class="keyword">using</span> <a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_query.html" title="A Query that matches documents within an exclusive range of terms.">TermRangeQuery</a> = Lucene.Net.Search.<a class="code" href="class_lucene_1_1_net_1_1_search_1_1_term_range_query.html#a02e67280c2f6db64ac6a8329e190dded" title="Constructs a query selecting all terms greater/equal than lowerTerm but less/equal than upperTerm...">TermRangeQuery</a>;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="comment">// for javadoc</span></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;<span class="keyword">namespace </span>Lucene.Net.<a class="code" href="_index_set_8cs.html#ab0c91be630b1f43f2379cc5964ed640c">Documents</a></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;{</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <span class="comment">// for javadoc</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="comment">// do not remove in 3.0, needed for reading old indexes!</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; [Obsolete(<span class="stringliteral">&quot;If you build a new index, use DateTools or NumericField instead.This class is included for use with existing indices and will be removed in a future release (possibly Lucene 4.0).&quot;</span>)]</div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html"> 63</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html" title="Provides support for converting dates to strings and vice-versa. The strings are structured so that l...">DateField</a></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">private</span> <a class="code" href="_query_parser_8cs.html#a2bed57a5b647aebd74ac59d7f68c8383">DateField</a>()</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"> 70</span>&#160; <span class="comment">// make date strings long enough to last a millenium</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keyword">private</span> <span class="keyword">static</span> <span class="keywordtype">int</span> DATE_LEN = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#a665755a13d3b013a03f5abb1a3fd44e9" title="Converts a number to System.String. ">ToString</a>(1000L * 365 * 24 * 60 * 60 * 1000, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#aa5971e5d83ced544926f33bf55f6b921" title="Max radix value. ">MAX_RADIX</a>).Length;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#a86fd1b71a714934812774d463b90de63"> 73</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> System.String MIN_DATE_STRING()</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; <span class="keywordflow">return</span> TimeToString(0);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; }</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"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#a07a9c1a6b16a63778cc749b048274885"> 78</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> System.String MAX_DATE_STRING()</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordtype">char</span>[] buffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[DATE_LEN];</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordtype">char</span> c = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html" title="Mimics Java&#39;s Character class. ">Character</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html#a07dd3fffaecd7b7b8fcf0ce205b86d9d">ForDigit</a>(<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html" title="Mimics Java&#39;s Character class. ">Character</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html#aaacc6c0f8c2c0bd0c38739fbc23885da">MAX_RADIX</a> - 1, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html" title="Mimics Java&#39;s Character class. ">Character</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html#aaacc6c0f8c2c0bd0c38739fbc23885da">MAX_RADIX</a>);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; DATE_LEN; i++)</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; buffer[i] = c;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> System.String(buffer);</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; </div>
<div class="line"><a name="l00091"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#af912af482583acf05cd05494d7eff39c"> 91</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> System.String DateToString(System.DateTime date)</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"> 93</span>&#160; TimeSpan ts = date.Subtract(<span class="keyword">new</span> DateTime(1970, 1, 1));</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; ts = ts.Subtract(TimeZone.CurrentTimeZone.GetUtcOffset(date));</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordflow">return</span> TimeToString(ts.Ticks / TimeSpan.TicksPerMillisecond);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; }</div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#af89284657e30ef8fad6337c6363e49a1"> 101</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> System.String TimeToString(<span class="keywordtype">long</span> time)</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; <span class="keywordflow">if</span> (time &lt; 0)</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.SystemException(<span class="stringliteral">&quot;time &#39;&quot;</span> + time + <span class="stringliteral">&quot;&#39; is too early, must be &gt;= 0&quot;</span>);</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; System.String s = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#a665755a13d3b013a03f5abb1a3fd44e9" title="Converts a number to System.String. ">ToString</a>(time, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html" title="Mimics Java&#39;s Character class. ">Character</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_character.html#aaacc6c0f8c2c0bd0c38739fbc23885da">MAX_RADIX</a>);</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; <span class="keywordflow">if</span> (s.Length &gt; DATE_LEN)</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.SystemException(<span class="stringliteral">&quot;time &#39;&quot;</span> + time + <span class="stringliteral">&quot;&#39; is too late, length of string &quot;</span> + <span class="stringliteral">&quot;representation must be &lt;= &quot;</span> + DATE_LEN);</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="comment">// Pad with leading zeros</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">if</span> (s.Length &lt; DATE_LEN)</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; System.Text.StringBuilder sb = <span class="keyword">new</span> System.Text.StringBuilder(s);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="keywordflow">while</span> (sb.Length &lt; DATE_LEN)</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; sb.Insert(0, 0);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; s = sb.ToString();</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; }</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; <span class="keywordflow">return</span> s;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; }</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; </div>
<div class="line"><a name="l00124"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#a4cd5c5e9199526cc273d069a0a8c548e"> 124</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">long</span> StringToTime(System.String s)</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; {</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordflow">return</span> <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#a39aa94966b78ae77aec0e8d2a91d816a" title="Parses a number in the specified radix. ">Parse</a>(s, <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#aa5971e5d83ced544926f33bf55f6b921" title="Max radix value. ">MAX_RADIX</a>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; }</div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_documents_1_1_date_field.html#a3cc6e043c9676a80e73e4507f92196f1"> 129</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> System.DateTime StringToDate(System.String s)</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="keywordtype">long</span> ticks = StringToTime(s) * TimeSpan.TicksPerMillisecond;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; System.DateTime date = <span class="keyword">new</span> System.DateTime(1970, 1, 1);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; date = date.AddTicks(ticks);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; date = date.Add(TimeZone.CurrentTimeZone.GetUtcOffset(date));</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordflow">return</span> date;</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; }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;}</div>
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