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| <a href="_merge_doc_i_d_remapper_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"> 20</span> </div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>Lucene.Net.Index</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_doc_i_d_remapper.html"> 30</a></span>  sealed <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_doc_i_d_remapper.html" title="Remaps docIDs after a merge has completed, where the merged segments had at least one deletion...">MergeDocIDRemapper</a></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span>[] starts; <span class="comment">// used for binary search of mapped docID</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span>[] newStarts; <span class="comment">// starts, minus the deletes</span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span>[][] docMaps; <span class="comment">// maps docIDs in the merged set</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> minDocID; <span class="comment">// minimum docID that needs renumbering</span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> maxDocID; <span class="comment">// 1+ the max docID that needs renumbering</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> docShift; <span class="comment">// total # deleted docs that were compacted by this merge</span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div> |
| <div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_doc_i_d_remapper.html#a6437b0a3ad316bb884b0237ee71da5c6"> 39</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_doc_i_d_remapper.html" title="Remaps docIDs after a merge has completed, where the merged segments had at least one deletion...">MergeDocIDRemapper</a>(<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_infos.html" title="A collection of segmentInfo objects with methods for operating on those segments in relation to the f...">SegmentInfos</a> infos, <span class="keywordtype">int</span>[][] docMaps, <span class="keywordtype">int</span>[] delCounts, <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_policy.html" title="Expert: a MergePolicy determines the sequence of primitive merge operations to be used for overall me...">MergePolicy</a>.OneMerge merge, <span class="keywordtype">int</span> mergedDocCount)</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  this.docMaps = docMaps;</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html" title="Information about a segment such as it's name, directory, and files related to the segment...">SegmentInfo</a> firstSegment = merge.segments.Info(0);</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">int</span> i = 0;</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>)</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>  <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html" title="Information about a segment such as it's name, directory, and files related to the segment...">SegmentInfo</a> info = infos.<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_infos.html#a879c913c5764aea25d26ae7d206eedc0">Info</a>(i);</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (info.<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html#aef72409e3194f4cbfaf8f9d0709da12f" title="We consider another SegmentInfo instance equal if it has the same dir and same name. ">Equals</a>(firstSegment))</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  minDocID += info.<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html#ab29756c79d65d6c453ea88b6da148d0f">docCount</a>;</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  i++;</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="keywordtype">int</span> numDocs = 0;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < docMaps.Length; i++, j++)</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>  numDocs += infos.<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_infos.html#a879c913c5764aea25d26ae7d206eedc0">Info</a>(i).<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html#ab29756c79d65d6c453ea88b6da148d0f">docCount</a>;</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  System.Diagnostics.Debug.Assert(infos.<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_infos.html#a879c913c5764aea25d26ae7d206eedc0">Info</a>(i).<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_info.html#aef72409e3194f4cbfaf8f9d0709da12f" title="We consider another SegmentInfo instance equal if it has the same dir and same name. ">Equals</a>(merge.segments.Info(j)));</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  }</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  maxDocID = minDocID + numDocs;</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  starts = <span class="keyword">new</span> <span class="keywordtype">int</span>[docMaps.Length];</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  newStarts = <span class="keyword">new</span> <span class="keywordtype">int</span>[docMaps.Length];</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  starts[0] = minDocID;</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  newStarts[0] = minDocID;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">for</span> (i = 1; i < docMaps.Length; i++)</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> lastDocCount = merge.segments.Info(i - 1).docCount;</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  starts[i] = starts[i - 1] + lastDocCount;</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  newStarts[i] = newStarts[i - 1] + lastDocCount - delCounts[i - 1];</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>  docShift = numDocs - mergedDocCount;</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>  <span class="comment">// There are rare cases when docShift is 0. It happens</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// if you try to delete a docID that's out of bounds,</span></div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// because the SegmentReader still allocates deletedDocs</span></div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">// and pretends it has deletions ... so we can't make</span></div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// this assert here</span></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">// assert docShift > 0;</span></div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// Make sure it all adds up:</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  System.Diagnostics.Debug.Assert(docShift == maxDocID -(newStarts [docMaps.Length - 1] + merge.segments.Info(docMaps.Length - 1).docCount - delCounts [docMaps.Length - 1]));</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="l00085"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_merge_doc_i_d_remapper.html#ab0fc7a018fca0175ec07adcde7c56cd6"> 85</a></span>  <span class="keyword">public</span> <span class="keywordtype">int</span> Remap(<span class="keywordtype">int</span> oldDocID)</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (oldDocID < minDocID)</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// Unaffected by merge</span></div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> oldDocID;</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (oldDocID >= maxDocID)</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// This doc was "after" the merge, so simple shift</span></div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> oldDocID - docShift;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">else</span></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="comment">// Binary search to locate this document & find its new docID</span></div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">int</span> lo = 0; <span class="comment">// search starts array</span></div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">int</span> hi = docMaps.Length - 1; <span class="comment">// for first element less</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>  <span class="keywordflow">while</span> (hi >= lo)</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  {</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">int</span> mid = <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#aafe44e2acf7feacad6abd2a425730644" title="Performs an unsigned bitwise right shift with the specified number ">URShift</a>((lo + hi), 1);</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">int</span> midValue = starts[mid];</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (oldDocID < midValue)</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  hi = mid - 1;</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (oldDocID > midValue)</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  lo = mid + 1;</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">else</span></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>  <span class="comment">// found a match</span></div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">while</span> (mid + 1 < docMaps.Length && starts[mid + 1] == midValue)</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  mid++; <span class="comment">// scan to last match</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="keywordflow">if</span> (docMaps[mid] != null)</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> newStarts[mid] + docMaps[mid][oldDocID - starts[mid]];</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">return</span> newStarts[mid] + oldDocID - starts[mid];</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>  }</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (docMaps[hi] != null)</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> newStarts[hi] + docMaps[hi][oldDocID - starts[hi]];</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> newStarts[hi] + oldDocID - starts[hi];</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</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>  }</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> }</div> |
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