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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_0fd6a22b48ba7ca96d8c1554e5fff3e1.html">Store</a></li> </ul> |
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| <div class="title">CheckSumIndexOutput.cs</div> </div> |
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| <a href="_check_sum_index_output_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> Lucene.Net.Support;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_check_sum_index_output_8cs.html#a29d59eac6cfa225be71f3053f10d19af"> 20</a></span> <span class="keyword">using</span> <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_c_r_c32.html">CRC32</a> = Lucene.Net.Support.CRC32;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">namespace </span>Lucene.Net.Store</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html"> 28</a></span>  <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html" title="Writes bytes through to a primary IndexOutput, computing checksum. Note that you cannot use seek()...">ChecksumIndexOutput</a>:<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_output.html" title="Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations. ">IndexOutput</a></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_output.html" title="Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations. ">IndexOutput</a> main;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">internal</span> <a class="code" href="interface_lucene_1_1_net_1_1_support_1_1_i_checksum.html" title="Contains conversion support elements such as classes, interfaces and static methods. ">IChecksum</a> digest;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div> |
| <div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#a33a742e497c3b3cc5883d1405f383446"> 35</a></span>  <span class="keyword">public</span> <a class="code" href="_segment_infos_8cs.html#a75b36344b1d3bb7e82d49a97573813c3">ChecksumIndexOutput</a>(<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_output.html" title="Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations. ">IndexOutput</a> main)</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  {</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  this.main = main;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  digest = <span class="keyword">new</span> <a class="code" href="_check_sum_index_output_8cs.html#a29d59eac6cfa225be71f3053f10d19af">CRC32</a>();</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  }</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div> |
| <div class="line"><a name="l00041"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#a2b203926792fed002da6e2bc903c0ad3"> 41</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> WriteByte(byte b)</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  {</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  digest.Update(b);</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  main.WriteByte(b);</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</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_store_1_1_checksum_index_output.html#a92c13b286dae84b1e27e64a617bfd2e9"> 47</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> WriteBytes(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> length)</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  {</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  digest.Update(b, offset, length);</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  main.WriteBytes(b, offset, length);</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</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>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">long</span> Checksum</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#a45f58aaac40c19f2e6998738930e5d2b"> 54</a></span>  {</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> digest.Value; }</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</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_store_1_1_checksum_index_output.html#a183d7c6acd38e1dd37ae24bb5a994db4"> 58</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Flush()</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>  main.Flush();</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="l00063"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#ad9fdfff954465d3912138ae157ac0022"> 63</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="l00064"></a><span class="lineno"> 64</span>  {</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">if</span> (disposing)</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  main.Close();</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</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>  isDisposed = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</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>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> FilePointer</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#ac0d841f4f3e1f2798471d24bb7ce3b58"> 76</a></span>  {</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> main.FilePointer; }</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div> |
| <div class="line"><a name="l00080"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#a783b42faf58ed6c3a69fc378455d1404"> 80</a></span>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Seek(<span class="keywordtype">long</span> pos)</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">throw</span> <span class="keyword">new</span> System.SystemException(<span class="stringliteral">"not allowed"</span>);</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div> |
| <div class="line"><a name="l00090"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#ae204fc37fd626716d27be947974eb4d7"> 90</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> PrepareCommit()</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  {</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">long</span> checksum = Checksum;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Intentionally write a mismatched checksum. This is</span></div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// because we want to 1) test, as best we can, that we</span></div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// are able to write a long to the file, but 2) not</span></div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// actually "commit" the file yet. This (prepare</span></div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// commit) is phase 1 of a two-phase commit.</span></div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">long</span> pos = main.FilePointer;</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  main.WriteLong(checksum - 1);</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  main.Flush();</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  main.Seek(pos);</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div> |
| <div class="line"><a name="l00105"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#ab8d1beb2bb94fe78a4a2ff71349b275d"> 105</a></span>  <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> FinishCommit()</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  {</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  main.WriteLong(Checksum);</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</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>  <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_checksum_index_output.html#ad09c1cdbee2b85c3534c03b1655a3aa1"> 111</a></span>  {</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> main.Length; }</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>  }</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }</div> |
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