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&#160;<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">SimpleFSDirectory.cs</div> </div>
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<a href="_simple_f_s_directory_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"> 20</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Store</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;{</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html"> 30</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html" title="A straightforward implementation of FSDirectory using java.io.RandomAccessFile. However, this class has poor concurrent performance (multiple threads will bottleneck) as it synchronizes when multiple threads read from the same file. It&#39;s usually better to use NIOFSDirectory or MMapDirectory instead. ">SimpleFSDirectory</a> : <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_f_s_directory.html" title=" Base class for Directory implementations that store index files in the file system. There are currently three core subclasses:">FSDirectory</a></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; {</div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html#acca276ae10d86f22126f2354928b28d0"> 40</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html" title="A straightforward implementation of FSDirectory using java.io.RandomAccessFile. However, this class has poor concurrent performance (multiple threads will bottleneck) as it synchronizes when multiple threads read from the same file. It&#39;s usually better to use NIOFSDirectory or MMapDirectory instead. ">SimpleFSDirectory</a>(System.IO.DirectoryInfo path, <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_lock_factory.html" title="Base class for Locking implementation. Directory uses instances of this class to implement locking...">LockFactory</a> lockFactory)</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; : base(path, lockFactory)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; {</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html#ad0cdd3ba5912cb56c92e577e03370565"> 51</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html" title="A straightforward implementation of FSDirectory using java.io.RandomAccessFile. However, this class has poor concurrent performance (multiple threads will bottleneck) as it synchronizes when multiple threads read from the same file. It&#39;s usually better to use NIOFSDirectory or MMapDirectory instead. ">SimpleFSDirectory</a>(System.IO.DirectoryInfo path) : base(path, null)</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; }</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html#abd10cb8ca402c6a05fedca5975920131"> 56</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</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> CreateOutput(System.String name)</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; InitOutput(name);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html">SimpleFSIndexOutput</a>(<span class="keyword">new</span> System.IO.FileInfo(System.IO.Path.Combine(internalDirectory.FullName, name)));</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; </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_simple_f_s_directory.html#a81277add65cc14b7a64765d068837b9d"> 63</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_input.html" title="Abstract base class for input from a file in a Directory. A random-access input stream. Used for all Lucene index input operations. ">IndexInput</a> OpenInput(System.String name, <span class="keywordtype">int</span> bufferSize)</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; EnsureOpen();</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; Exception e = null;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">for</span> (var i = 0; i &lt; 10; i++)</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="keywordflow">try</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> SimpleFSIndexInput(<span class="keyword">new</span> System.IO.FileInfo(</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; System.IO.Path.Combine(internalDirectory.FullName, name)), bufferSize, ReadChunkSize);</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">catch</span> (System.UnauthorizedAccessException ex)</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; e = ex;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; System.Threading.Thread.Sleep(1);</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; }</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="keywordflow">throw</span> e;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">class </span>SimpleFSIndexInput : <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_buffered_index_input.html" title="Base implementation class for buffered IndexInput. ">BufferedIndexInput</a></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="comment">// TODO: This is a bad way to handle memory and disposing</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">class </span>Descriptor : System.IO.BinaryReader</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="comment">// remember if the file is open, so that we don&#39;t try to close it</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="comment">// more than once</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">volatile</span> <span class="keywordtype">bool</span> isOpen;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">long</span> position;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">long</span> length;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</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; <span class="keyword">public</span> Descriptor(<span class="comment">/*FSIndexInput enclosingInstance,*/</span> System.IO.FileInfo file, System.IO.FileAccess mode) </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; : base(new System.IO.FileStream(file.FullName, System.IO.FileMode.Open, mode, System.IO.FileShare.ReadWrite))</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; isOpen = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; length = file.Length;</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"> 104</span>&#160;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <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="l00106"></a><span class="lineno"> 106</span>&#160; {</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</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="keywordflow">if</span> (disposing)</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> (isOpen)</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; isOpen = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; }</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</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; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; base.Dispose(disposing);</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; </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; ~Descriptor()</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="keywordflow">try</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; Dispose(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; {</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; }</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; }</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; <span class="keyword">protected</span> <span class="keyword">internal</span> Descriptor file;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">bool</span> isClone;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="comment">// LUCENE-1566 - maximum read length on a 32bit JVM to prevent incorrect OOM </span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keywordtype">int</span> chunkSize;</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="keyword">public</span> SimpleFSIndexInput(System.IO.FileInfo path, <span class="keywordtype">int</span> bufferSize, <span class="keywordtype">int</span> chunkSize)</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; : base(bufferSize)</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; file = <span class="keyword">new</span> Descriptor(path, System.IO.FileAccess.Read);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; this.chunkSize = chunkSize;</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;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> ReadInternal(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> len)</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; lock (file)</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="keywordtype">long</span> position = FilePointer;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">if</span> (position != file.position)</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; file.BaseStream.Seek(position, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; file.position = position;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordtype">int</span> total = 0;</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; <span class="keywordflow">try</span></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; <span class="keywordflow">do</span> </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; {</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; <span class="keywordtype">int</span> readLength;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; <span class="keywordflow">if</span> (total + chunkSize &gt; len)</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; {</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; readLength = len - total;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; }</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; {</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="comment">// LUCENE-1566 - work around JVM Bug by breaking very large reads into chunks</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; readLength = chunkSize;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; }</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="keywordtype">int</span> i = file.Read(b, offset + total, readLength);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="keywordflow">if</span> (i == - 1)</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; {</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;read past EOF&quot;</span>);</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; file.position += i;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; total += i;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; }</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="keywordflow">while</span> (total &lt; len);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; }</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <span class="keywordflow">catch</span> (System.OutOfMemoryException e)</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="comment">// propagate OOM up and add a hint for 32bit VM Users hitting the bug</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="comment">// with a large chunk size in the fast path.</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; System.OutOfMemoryException outOfMemoryError = <span class="keyword">new</span> System.OutOfMemoryException(<span class="stringliteral">&quot;OutOfMemoryError likely caused by the Sun VM Bug described in &quot;</span> + <span class="stringliteral">&quot;https://issues.apache.org/jira/browse/LUCENE-1566; try calling FSDirectory.setReadChunkSize &quot;</span> + <span class="stringliteral">&quot;with a a value smaller than the current chunks size (&quot;</span> + chunkSize + <span class="stringliteral">&quot;)&quot;</span>, e);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keywordflow">throw</span> outOfMemoryError;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; }</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; }</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <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="l00194"></a><span class="lineno"> 194</span>&#160; {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <span class="keywordflow">if</span> (disposing)</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <span class="comment">// only close the file if this is not a clone</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="keywordflow">if</span> (!isClone &amp;&amp; file != null)</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; file.Close();</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; file = null;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SeekInternal(<span class="keywordtype">long</span> position)</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length()</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; {</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="keywordflow">return</span> file.length;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> System.Object Clone()</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; SimpleFSIndexInput clone = (SimpleFSIndexInput) base.Clone();</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; clone.isClone = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <span class="keywordflow">return</span> clone;</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; }</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="keyword">public</span> <span class="comment">/*internal*/</span> <span class="keyword">virtual</span> <span class="keywordtype">bool</span> IsFDValid()</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; {</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; <span class="keywordflow">return</span> file.BaseStream != null;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; }</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="keyword">public</span> <span class="keywordtype">bool</span> isClone_ForNUnit</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; {</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> isClone; }</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; }</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; </div>
<div class="line"><a name="l00239"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html"> 239</a></span>&#160; <span class="comment">/*protected internal*/</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_simple_f_s_directory_1_1_simple_f_s_index_output.html">SimpleFSIndexOutput</a>:<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_buffered_index_output.html" title="Base implementation class for buffered IndexOutput. ">BufferedIndexOutput</a></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; <span class="keyword">internal</span> System.IO.FileStream file = null;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; <span class="comment">// remember if the file is open, so that we don&#39;t try to close it</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="comment">// more than once</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; <span class="keyword">private</span> <span class="keyword">volatile</span> <span class="keywordtype">bool</span> isOpen;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;</div>
<div class="line"><a name="l00247"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#a4aa0f88a127ce5ad330552a379416f81"> 247</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html">SimpleFSIndexOutput</a>(System.IO.FileInfo path)</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; file = <span class="keyword">new</span> System.IO.FileStream(path.FullName, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.ReadWrite);</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; isOpen = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; }</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; </div>
<div class="line"><a name="l00254"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#a69d6dbd37575dd068a3db8ae3e624ef1"> 254</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> FlushBuffer(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> size)</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; file.Write(b, offset, size);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <span class="comment">// {{dougsale-2.4.0}}</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="comment">// FSIndexOutput.Flush</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <span class="comment">// When writing frequently with small amounts of data, the data isn&#39;t flushed to disk.</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="comment">// Thus, attempting to read the data soon after this method is invoked leads to</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <span class="comment">// BufferedIndexInput.Refill() throwing an IOException for reading past EOF.</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="comment">// Test\Index\TestDoc.cs demonstrates such a situation.</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="comment">// Forcing a flush here prevents said issue.</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="comment">// {{DIGY 2.9.0}}</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; <span class="comment">// This code is not available in Lucene.Java 2.9.X.</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="comment">// Can there be a indexing-performance problem?</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; file.<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_buffered_index_output.html#a797a0cba22cecb096a18f169012aa502" title="Forces any buffered output to be written. ">Flush</a>();</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; }</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;</div>
<div class="line"><a name="l00270"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#a4bd9d7004cd146ab3747d72d4705dd52"> 270</a></span>&#160; <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="l00271"></a><span class="lineno"> 271</span>&#160; {</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; <span class="comment">// only close the file if it has not been closed yet</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; <span class="keywordflow">if</span> (isOpen)</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; {</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; <span class="keywordtype">bool</span> success = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; {</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; base.Dispose(disposing);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; success = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; }</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; {</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; isOpen = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; <span class="keywordflow">if</span> (!success)</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; {</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; file.Dispose();</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; }</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <span class="keywordflow">catch</span> (System.Exception)</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; <span class="comment">// Suppress so we don&#39;t mask original exception</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; }</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="keywordflow">else</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; file.Dispose();</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; }</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; }</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; </div>
<div class="line"><a name="l00302"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#a53f65aa11f755e3e32b673e8059b8d63"> 302</a></span>&#160; <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="l00303"></a><span class="lineno"> 303</span>&#160; {</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; base.Seek(pos);</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; file.Seek(pos, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length</div>
<div class="line"><a name="l00309"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#a4287a5ebff1f1ec3e5b98b95e4ad0d8a"> 309</a></span>&#160; {</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> file.Length; }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; }</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160;</div>
<div class="line"><a name="l00313"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory_1_1_simple_f_s_index_output.html#ada00ba7c68416cadf670b5b0db7e25fc"> 313</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SetLength(<span class="keywordtype">long</span> length)</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; {</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; file.SetLength(length);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; }</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; }</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160;}</div>
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