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<a href="Decoder_8hh.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</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"> * https://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, software</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</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="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * limitations under the License.</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#ifndef avro_Decoder_hh__</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#define avro_Decoder_hh__</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 &quot;Config.hh&quot;</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &quot;ValidSchema.hh&quot;</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &quot;Stream.hh&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceavro.html">avro</a> {</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classavro_1_1Decoder.html"> 48</a></span>&#160;<span class="keyword">class </span>AVRO_DECL <a class="code" href="classavro_1_1Decoder.html">Decoder</a> {</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keyword">virtual</span> ~<a class="code" href="classavro_1_1Decoder.html">Decoder</a>() { };</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> init(<a class="code" href="classavro_1_1InputStream.html">InputStream</a>&amp; is) = 0;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> decodeNull() = 0;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">bool</span> decodeBool() = 0;</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"> 63</span>&#160; <span class="keyword">virtual</span> int32_t decodeInt() = 0;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">virtual</span> int64_t decodeLong() = 0;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">float</span> decodeFloat() = 0;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">double</span> decodeDouble() = 0;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno"><a class="line" href="classavro_1_1Decoder.html#adf991b9e4d42bc0d6e992435192714ad"> 75</a></span>&#160; std::string <a class="code" href="classavro_1_1Decoder.html#adf991b9e4d42bc0d6e992435192714ad">decodeString</a>() {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; std::string result;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; decodeString(result);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">return</span> result;</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="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> decodeString(std::string&amp; value) = 0;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> skipString() = 0;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div><div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classavro_1_1Decoder.html#a50882d78ce6fe028ff03206b60231d63"> 90</a></span>&#160; std::vector&lt;uint8_t&gt; <a class="code" href="classavro_1_1Decoder.html#a50882d78ce6fe028ff03206b60231d63">decodeBytes</a>() {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; std::vector&lt;uint8_t&gt; result;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; decodeBytes(result);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; }</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> decodeBytes(std::vector&lt;uint8_t&gt;&amp; value) = 0;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> skipBytes() = 0;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classavro_1_1Decoder.html#abff413217a31b08e9f66e361b2a18b6e"> 109</a></span>&#160; std::vector&lt;uint8_t&gt; <a class="code" href="classavro_1_1Decoder.html#abff413217a31b08e9f66e361b2a18b6e">decodeFixed</a>(<span class="keywordtype">size_t</span> n) {</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; std::vector&lt;uint8_t&gt; result;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; decodeFixed(n, result);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> decodeFixed(<span class="keywordtype">size_t</span> n, std::vector&lt;uint8_t&gt;&amp; value) = 0;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> skipFixed(<span class="keywordtype">size_t</span> n) = 0;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> decodeEnum() = 0;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> arrayStart() = 0;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> arrayNext() = 0;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> skipArray() = 0;</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> mapStart() = 0;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> mapNext() = 0;</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> skipMap() = 0;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> decodeUnionIndex() = 0;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> drain() = 0;</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;</div><div class="line"><a name="l00177"></a><span class="lineno"><a class="line" href="namespaceavro.html#a7403d421c11fed3d8aa50f412f80b7b5"> 177</a></span>&#160;<span class="keyword">typedef</span> std::shared_ptr&lt;Decoder&gt; <a class="code" href="namespaceavro.html#a7403d421c11fed3d8aa50f412f80b7b5">DecoderPtr</a>;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;</div><div class="line"><a name="l00183"></a><span class="lineno"><a class="line" href="classavro_1_1ResolvingDecoder.html"> 183</a></span>&#160;<span class="keyword">class </span>AVRO_DECL <a class="code" href="classavro_1_1ResolvingDecoder.html">ResolvingDecoder</a> : <span class="keyword">public</span> <a class="code" href="classavro_1_1Decoder.html">Decoder</a> {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keyword">virtual</span> <span class="keyword">const</span> std::vector&lt;size_t&gt;&amp; fieldOrder() = 0;</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="l00196"></a><span class="lineno"><a class="line" href="namespaceavro.html#a5bd01b70008d509062d39d07d1e13bc8"> 196</a></span>&#160;<span class="keyword">typedef</span> std::shared_ptr&lt;ResolvingDecoder&gt; <a class="code" href="namespaceavro.html#a5bd01b70008d509062d39d07d1e13bc8">ResolvingDecoderPtr</a>;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160;AVRO_DECL DecoderPtr <a class="code" href="namespaceavro.html#a04f78e53cb84a0189b626e6a5726b148">binaryDecoder</a>();</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160;AVRO_DECL DecoderPtr <a class="code" href="namespaceavro.html#a9408498d77f42a536074433cc541d8ae">validatingDecoder</a>(<span class="keyword">const</span> <a class="code" href="classavro_1_1ValidSchema.html">ValidSchema</a>&amp; schema,</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keyword">const</span> DecoderPtr&amp; base);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160;AVRO_DECL DecoderPtr <a class="code" href="namespaceavro.html#a7ac8a9c93b0621227de3dcca383e36ff">jsonDecoder</a>(<span class="keyword">const</span> <a class="code" href="classavro_1_1ValidSchema.html">ValidSchema</a>&amp; schema);</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160;</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160;AVRO_DECL ResolvingDecoderPtr <a class="code" href="namespaceavro.html#aeef8b583abe36b25a8d2094d7a3d4b96">resolvingDecoder</a>(<span class="keyword">const</span> <a class="code" href="classavro_1_1ValidSchema.html">ValidSchema</a>&amp; writer,</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keyword">const</span> <a class="code" href="classavro_1_1ValidSchema.html">ValidSchema</a>&amp; reader, <span class="keyword">const</span> DecoderPtr&amp; base);</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160;</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;} <span class="comment">// namespace avro</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160;</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="classavro_1_1Decoder_html_a50882d78ce6fe028ff03206b60231d63"><div class="ttname"><a href="classavro_1_1Decoder.html#a50882d78ce6fe028ff03206b60231d63">avro::Decoder::decodeBytes</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; decodeBytes()</div><div class="ttdoc">Decodes arbitray binary data from the current stream. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:90</div></div>
<div class="ttc" id="namespaceavro_html"><div class="ttname"><a href="namespaceavro.html">avro</a></div><div class="ttdoc">A bunch of templates and specializations for encoding and decoding specific types. </div><div class="ttdef"><b>Definition:</b> AvroParse.hh:30</div></div>
<div class="ttc" id="namespaceavro_html_aeef8b583abe36b25a8d2094d7a3d4b96"><div class="ttname"><a href="namespaceavro.html#aeef8b583abe36b25a8d2094d7a3d4b96">avro::resolvingDecoder</a></div><div class="ttdeci">AVRO_DECL ResolvingDecoderPtr resolvingDecoder(const ValidSchema &amp;writer, const ValidSchema &amp;reader, const DecoderPtr &amp;base)</div><div class="ttdoc">Returns a decoder that decodes avro data from base written according to writerSchema and resolves aga...</div></div>
<div class="ttc" id="classavro_1_1ResolvingDecoder_html"><div class="ttname"><a href="classavro_1_1ResolvingDecoder.html">avro::ResolvingDecoder</a></div><div class="ttdoc">ResolvingDecoder is derived from Decoder, with an additional function to obtain the field ordering of...</div><div class="ttdef"><b>Definition:</b> Decoder.hh:183</div></div>
<div class="ttc" id="namespaceavro_html_a9408498d77f42a536074433cc541d8ae"><div class="ttname"><a href="namespaceavro.html#a9408498d77f42a536074433cc541d8ae">avro::validatingDecoder</a></div><div class="ttdeci">AVRO_DECL DecoderPtr validatingDecoder(const ValidSchema &amp;schema, const DecoderPtr &amp;base)</div><div class="ttdoc">Returns an decoder that validates sequence of calls to an underlying Decoder against the given schema...</div></div>
<div class="ttc" id="namespaceavro_html_a7ac8a9c93b0621227de3dcca383e36ff"><div class="ttname"><a href="namespaceavro.html#a7ac8a9c93b0621227de3dcca383e36ff">avro::jsonDecoder</a></div><div class="ttdeci">AVRO_DECL DecoderPtr jsonDecoder(const ValidSchema &amp;schema)</div><div class="ttdoc">Returns an decoder that can decode Avro standard for JSON. </div></div>
<div class="ttc" id="namespaceavro_html_a7403d421c11fed3d8aa50f412f80b7b5"><div class="ttname"><a href="namespaceavro.html#a7403d421c11fed3d8aa50f412f80b7b5">avro::DecoderPtr</a></div><div class="ttdeci">std::shared_ptr&lt; Decoder &gt; DecoderPtr</div><div class="ttdoc">Shared pointer to Decoder. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:177</div></div>
<div class="ttc" id="classavro_1_1Decoder_html_abff413217a31b08e9f66e361b2a18b6e"><div class="ttname"><a href="classavro_1_1Decoder.html#abff413217a31b08e9f66e361b2a18b6e">avro::Decoder::decodeFixed</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; decodeFixed(size_t n)</div><div class="ttdoc">Decodes fixed length binary from the current stream. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:109</div></div>
<div class="ttc" id="classavro_1_1ValidSchema_html"><div class="ttname"><a href="classavro_1_1ValidSchema.html">avro::ValidSchema</a></div><div class="ttdoc">A ValidSchema is basically a non-mutable Schema that has passed some minumum of sanity checks...</div><div class="ttdef"><b>Definition:</b> ValidSchema.hh:40</div></div>
<div class="ttc" id="classavro_1_1InputStream_html"><div class="ttname"><a href="classavro_1_1InputStream.html">avro::InputStream</a></div><div class="ttdoc">A no-copy input stream. </div><div class="ttdef"><b>Definition:</b> Stream.hh:36</div></div>
<div class="ttc" id="namespaceavro_html_a04f78e53cb84a0189b626e6a5726b148"><div class="ttname"><a href="namespaceavro.html#a04f78e53cb84a0189b626e6a5726b148">avro::binaryDecoder</a></div><div class="ttdeci">AVRO_DECL DecoderPtr binaryDecoder()</div><div class="ttdoc">Returns an decoder that can decode binary Avro standard. </div></div>
<div class="ttc" id="classavro_1_1Decoder_html_adf991b9e4d42bc0d6e992435192714ad"><div class="ttname"><a href="classavro_1_1Decoder.html#adf991b9e4d42bc0d6e992435192714ad">avro::Decoder::decodeString</a></div><div class="ttdeci">std::string decodeString()</div><div class="ttdoc">Decodes a UTF-8 string from the current stream. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:75</div></div>
<div class="ttc" id="classavro_1_1Decoder_html"><div class="ttname"><a href="classavro_1_1Decoder.html">avro::Decoder</a></div><div class="ttdoc">Decoder is an interface implemented by every decoder capable of decoding Avro data. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:48</div></div>
<div class="ttc" id="namespaceavro_html_a5bd01b70008d509062d39d07d1e13bc8"><div class="ttname"><a href="namespaceavro.html#a5bd01b70008d509062d39d07d1e13bc8">avro::ResolvingDecoderPtr</a></div><div class="ttdeci">std::shared_ptr&lt; ResolvingDecoder &gt; ResolvingDecoderPtr</div><div class="ttdoc">Shared pointer to ResolvingDecoder. </div><div class="ttdef"><b>Definition:</b> Decoder.hh:196</div></div>
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