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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_360ef3ae5e4df5878fa0b8837112e0b7.html">graphar</a></li> </ul>
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<div class="title">filesystem.h</div> </div>
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<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</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * under the License.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> */</span></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="preprocessor">#pragma once</span></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;<span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</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="preprocessor">#include &quot;graphar/result.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;graphar/status.h&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &quot;graphar/types.h&quot;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &quot;graphar/util.h&quot;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &quot;graphar/reader_util.h&quot;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &quot;graphar/writer_util.h&quot;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment">// forward declarations</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="keyword">namespace </span>arrow {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="keyword">class </span>Buffer;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">class </span>Table;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;} <span class="comment">// namespace arrow</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="keyword">namespace </span>arrow::fs {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">class </span>FileSystem;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;} <span class="comment">// namespace arrow::fs</span></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;<span class="keyword">namespace </span>arrow::io {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="keyword">class </span>RandomAccessFile;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;} <span class="comment">// namespace arrow::io</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; </div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="keyword">namespace </span>arrow::dataset {</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="keyword">class </span>FileFormat;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;} <span class="comment">// namespace arrow::dataset</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="keyword">namespace </span>graphar {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; </div>
<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="classgraphar_1_1_file_system.html"> 59</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgraphar_1_1_file_system.html">FileSystem</a> {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classgraphar_1_1_file_system.html#a240e8f3d8a4aab98d35a0faf6de54f25"> 65</a></span>&#160; <span class="keyword">explicit</span> <a class="code" href="classgraphar_1_1_file_system.html#a240e8f3d8a4aab98d35a0faf6de54f25">FileSystem</a>(std::shared_ptr&lt;arrow::fs::FileSystem&gt; arrow_fs)</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; : arrow_fs_(arrow_fs) {}</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; ~<a class="code" href="classgraphar_1_1_file_system.html">FileSystem</a>();</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; Result&lt;std::shared_ptr&lt;arrow::Table&gt;&gt; <a class="code" href="classgraphar_1_1_file_system.html#acfd1a7452cf5d89826ac119b90949956">ReadFileToTable</a>(</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keyword">const</span> std::string&amp; path, FileType file_type,</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keyword">const</span> <a class="code" href="structgraphar_1_1util_1_1_filter_options.html">util::FilterOptions</a>&amp; options = {}) <span class="keyword">const</span> noexcept;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; Result&lt;std::shared_ptr&lt;arrow::Table&gt;&gt; <a class="code" href="classgraphar_1_1_file_system.html#acfd1a7452cf5d89826ac119b90949956">ReadFileToTable</a>(</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keyword">const</span> std::string&amp; path, FileType file_type,</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">const</span> std::vector&lt;int&gt;&amp; column_indices) <span class="keyword">const</span> noexcept;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; Result&lt;T&gt; <a class="code" href="classgraphar_1_1_file_system.html#aa014a28119399836283a573c9abd97b7">ReadFileToValue</a>(<span class="keyword">const</span> std::string&amp; path) <span class="keyword">const</span> noexcept;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; Status <a class="code" href="classgraphar_1_1_file_system.html#a474b6e6ba28a0114a1d84f4eb06a211b">WriteValueToFile</a>(<span class="keyword">const</span> T&amp; value, <span class="keyword">const</span> std::string&amp; path) <span class="keyword">const</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; noexcept;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; Status <a class="code" href="classgraphar_1_1_file_system.html#af5c15ca6b858f7df89eea3e77319decf">WriteTableToFile</a>(<span class="keyword">const</span> std::shared_ptr&lt;arrow::Table&gt;&amp; table,</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; FileType file_type, <span class="keyword">const</span> std::string&amp; path,</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keyword">const</span> std::shared_ptr&lt;WriterOptions&gt;&amp; options) <span class="keyword">const</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; noexcept;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; </div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; Status <a class="code" href="classgraphar_1_1_file_system.html#ad48927d2fd542cc737cb16b7e529c0b6">WriteLabelTableToFile</a>(<span class="keyword">const</span> std::shared_ptr&lt;arrow::Table&gt;&amp; table,</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; <span class="keyword">const</span> std::string&amp; path) <span class="keyword">const</span> noexcept;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; </div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; Status <a class="code" href="classgraphar_1_1_file_system.html#aab2ff41d0c13cf27b24ec1612817b110">CopyFile</a>(<span class="keyword">const</span> std::string&amp; src_path,</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keyword">const</span> std::string&amp; dst_path) <span class="keyword">const</span> noexcept;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; Result&lt;IdType&gt; <a class="code" href="classgraphar_1_1_file_system.html#a293c0415cb3b72795e034f2a08510524">GetFileNumOfDir</a>(<span class="keyword">const</span> std::string&amp; dir_path,</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordtype">bool</span> recursive = <span class="keyword">false</span>) const noexcept;</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; private:</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; std::shared_ptr&lt;arrow::dataset::FileFormat&gt; GetFileFormat(</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; const FileType file_type) const;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; private:</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; std::shared_ptr&lt;arrow::fs::<a class="code" href="classgraphar_1_1_file_system.html#a240e8f3d8a4aab98d35a0faf6de54f25">FileSystem</a>&gt; arrow_fs_;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;};</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;Result&lt;std::shared_ptr&lt;<a class="code" href="classgraphar_1_1_file_system.html#a240e8f3d8a4aab98d35a0faf6de54f25">FileSystem</a>&gt;&gt; FileSystemFromUriOrPath(</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; const std::<span class="keywordtype">string</span>&amp; uri, std::<span class="keywordtype">string</span>* out_path = <span class="keywordtype">nullptr</span>);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;Status InitializeS3();</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; </div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160;Status FinalizeS3();</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160;} <span class="comment">// namespace graphar</span></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html"><div class="ttname"><a href="classgraphar_1_1_file_system.html">graphar::FileSystem</a></div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8h_source.html#l00059">filesystem.h:59</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_a240e8f3d8a4aab98d35a0faf6de54f25"><div class="ttname"><a href="classgraphar_1_1_file_system.html#a240e8f3d8a4aab98d35a0faf6de54f25">graphar::FileSystem::FileSystem</a></div><div class="ttdeci">FileSystem(std::shared_ptr&lt; arrow::fs::FileSystem &gt; arrow_fs)</div><div class="ttdoc">Create a FileSystem instance.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8h_source.html#l00065">filesystem.h:65</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_a293c0415cb3b72795e034f2a08510524"><div class="ttname"><a href="classgraphar_1_1_file_system.html#a293c0415cb3b72795e034f2a08510524">graphar::FileSystem::GetFileNumOfDir</a></div><div class="ttdeci">Result&lt; IdType &gt; GetFileNumOfDir(const std::string &amp;dir_path, bool recursive=false) const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00322">filesystem.cc:322</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_a474b6e6ba28a0114a1d84f4eb06a211b"><div class="ttname"><a href="classgraphar_1_1_file_system.html#a474b6e6ba28a0114a1d84f4eb06a211b">graphar::FileSystem::WriteValueToFile</a></div><div class="ttdeci">Status WriteValueToFile(const T &amp;value, const std::string &amp;path) const noexcept</div><div class="ttdoc">Write a value of type T to a file.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00229">filesystem.cc:229</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_aa014a28119399836283a573c9abd97b7"><div class="ttname"><a href="classgraphar_1_1_file_system.html#aa014a28119399836283a573c9abd97b7">graphar::FileSystem::ReadFileToValue</a></div><div class="ttdeci">Result&lt; T &gt; ReadFileToValue(const std::string &amp;path) const noexcept</div><div class="ttdoc">Read a file and convert its bytes to a value of type T.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00207">filesystem.cc:207</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_aab2ff41d0c13cf27b24ec1612817b110"><div class="ttname"><a href="classgraphar_1_1_file_system.html#aab2ff41d0c13cf27b24ec1612817b110">graphar::FileSystem::CopyFile</a></div><div class="ttdeci">Status CopyFile(const std::string &amp;src_path, const std::string &amp;dst_path) const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00313">filesystem.cc:313</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_acfd1a7452cf5d89826ac119b90949956"><div class="ttname"><a href="classgraphar_1_1_file_system.html#acfd1a7452cf5d89826ac119b90949956">graphar::FileSystem::ReadFileToTable</a></div><div class="ttdeci">Result&lt; std::shared_ptr&lt; arrow::Table &gt; &gt; ReadFileToTable(const std::string &amp;path, FileType file_type, const util::FilterOptions &amp;options={}) const noexcept</div><div class="ttdoc">Read and filter a file as an arrow::Table.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00142">filesystem.cc:142</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_ad48927d2fd542cc737cb16b7e529c0b6"><div class="ttname"><a href="classgraphar_1_1_file_system.html#ad48927d2fd542cc737cb16b7e529c0b6">graphar::FileSystem::WriteLabelTableToFile</a></div><div class="ttdeci">Status WriteLabelTableToFile(const std::shared_ptr&lt; arrow::Table &gt; &amp;table, const std::string &amp;path) const noexcept</div><div class="ttdoc">Write a label table to a file with parquet type.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00295">filesystem.cc:295</a></div></div>
<div class="ttc" id="aclassgraphar_1_1_file_system_html_af5c15ca6b858f7df89eea3e77319decf"><div class="ttname"><a href="classgraphar_1_1_file_system.html#af5c15ca6b858f7df89eea3e77319decf">graphar::FileSystem::WriteTableToFile</a></div><div class="ttdeci">Status WriteTableToFile(const std::shared_ptr&lt; arrow::Table &gt; &amp;table, FileType file_type, const std::string &amp;path, const std::shared_ptr&lt; WriterOptions &gt; &amp;options) const noexcept</div><div class="ttdoc">Write a table to a file with a specific type.</div><div class="ttdef"><b>Definition:</b> <a href="filesystem_8cc_source.html#l00252">filesystem.cc:252</a></div></div>
<div class="ttc" id="astructgraphar_1_1util_1_1_filter_options_html"><div class="ttname"><a href="structgraphar_1_1util_1_1_filter_options.html">graphar::util::FilterOptions</a></div><div class="ttdef"><b>Definition:</b> <a href="reader__util_8h_source.html#l00030">reader_util.h:30</a></div></div>
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