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<div class="title">Read an JSON content </div> </div>
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<div class="toc"><h3>Table of Contents</h3>
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<ul><li class="level1"><a href="#ejson_tutorial_read_file">Read an JSON file </a></li>
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<li class="level1"><a href="#ejson_tutorial_read_stream">Read an JSON Stream </a></li>
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<li class="level1"><a href="#ejson_tutorial_read_folow">Access at all Element datas </a></li>
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<li class="level1"><a href="#ejson_tutorial_read_all">All example file </a></li>
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<div class="textblock"><p>The first thing to do when reading or writing a JSON file/stream, is to declare the Document interface</p>
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<p>Include ejson </p><div class="fragment"><div class="line"><span class="preprocessor">#include <<a class="code" href="ejson_8hpp.html">ejson/ejson.hpp</a>></span></div></div><!-- fragment --><p> Declare document interface </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_document.html">ejson::Document</a> doc;</div></div><!-- fragment --><h1><a class="anchor" id="ejson_tutorial_read_file"></a>
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Read an JSON file </h1>
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<p>File to read: "read.json" </p><div class="fragment"><div class="line">{</div><div class="line"> "object A": "bonjour",</div><div class="line"> "object B": null,</div><div class="line"> "object C": true,</div><div class="line"> "object D": 123854,</div><div class="line"> "object E": [</div><div class="line"> 1,2,3,54,false</div><div class="line"> ],</div><div class="line"> "object F": {</div><div class="line"> "a": 1,</div><div class="line"> "b": 2</div><div class="line"> }</div><div class="line">}</div></div><!-- fragment --><p>Reading a file is done like this: </p><div class="fragment"><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#ae08ff9bbb26c9b8d2b9572781ecb1380">load</a>(<span class="stringliteral">"DATA:read.json"</span>);</div></div><!-- fragment --><p> The file naming is manage by <a class="elRef" doxygen="/home/heero/dev/perso/out/doc/release/etk.tag:http://atria-soft.github.io/etk/" href="http://atria-soft.github.io/etk/classetk_1_1_f_s_node.html">etk::FSNode</a> that provide "DATA:" start string for internal application asset. You can use external path like "./plop/file.json" too.</p>
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<h1><a class="anchor" id="ejson_tutorial_read_stream"></a>
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Read an JSON Stream </h1>
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<p>Reading a stream is done like this: </p><div class="fragment"><div class="line"> std::string stream = <span class="stringliteral">"{"</span></div><div class="line"> <span class="stringliteral">" \"object A\":\"bonjour\","</span></div><div class="line"> <span class="stringliteral">" \"object B\":null,"</span></div><div class="line"> <span class="stringliteral">" \"object C\":true,"</span></div><div class="line"> <span class="stringliteral">" \"object D\":123854.215,"</span></div><div class="line"> <span class="stringliteral">" \"object E\":["</span></div><div class="line"> <span class="stringliteral">" 1,2,3,54,false"</span></div><div class="line"> <span class="stringliteral">" ],"</span></div><div class="line"> <span class="stringliteral">" \"object F\":{"</span></div><div class="line"> <span class="stringliteral">" \"a\":1,"</span></div><div class="line"> <span class="stringliteral">" \"b\":2"</span></div><div class="line"> <span class="stringliteral">" }"</span></div><div class="line"> <span class="stringliteral">"}"</span>;</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#af10b1d008b045520e33fec96d6ca94c1">parse</a>(stream);</div></div><!-- fragment --><p> In C and C++ it is very hard to read string with the \" then to simplify parsing of json the parser engine support the use of simple **'** interface: </p><div class="fragment"><div class="line"> std::string stream = <span class="stringliteral">"{"</span></div><div class="line"> <span class="stringliteral">" objectA:'bonjour',"</span></div><div class="line"> <span class="stringliteral">" objectB:null,"</span></div><div class="line"> <span class="stringliteral">" objectC:true,"</span></div><div class="line"> <span class="stringliteral">" objectD:123854.215,"</span></div><div class="line"> <span class="stringliteral">" objectE:["</span></div><div class="line"> <span class="stringliteral">" #simple comment one Line"</span></div><div class="line"> <span class="stringliteral">" 1,2,3,54,false"</span></div><div class="line"> <span class="stringliteral">" ],"</span></div><div class="line"> <span class="stringliteral">" objectF:{"</span></div><div class="line"> <span class="stringliteral">" a:1,"</span></div><div class="line"> <span class="stringliteral">" b:2"</span></div><div class="line"> <span class="stringliteral">" }"</span></div><div class="line"> <span class="stringliteral">"}"</span>;</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#af10b1d008b045520e33fec96d6ca94c1">parse</a>(stream);</div></div><!-- fragment --><h1><a class="anchor" id="ejson_tutorial_read_folow"></a>
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Access at all Element datas </h1>
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<p>In an <a class="el" href="classejson_1_1_object.html" title="ejson Object interface { ... }. ">ejson::Object</a> (or <a class="el" href="classejson_1_1_document.html" title="ejson Document interface (acces with the file and stream). ">ejson::Document</a>) the sub-nodes are accessible threw an abstraction class stores in an element name <b>Value</b></p>
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<p>Get a value with its name: </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_value.html">ejson::Value</a> element = doc[<span class="stringliteral">"object C"</span>];</div></div><!-- fragment --> <h2>Access to a string in an Object: </h2>
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<p>The generic Way to access to an element is to convert it in the corect type: </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_string.html">ejson::String</a> elem = doc[<span class="stringliteral">"object A"</span>].<a class="code" href="classejson_1_1_value.html#a43a3bf8ff0d02f92e8751ea8a16fcaa1">toString</a>();</div><div class="line"> <span class="comment">// Get the value:</span></div><div class="line"> std::string <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709a2063c1608d6e0baf80249c42e2be5804">value</a> = elem.<a class="code" href="classejson_1_1_string.html#ad8fa78302b225c6228ee8d971489726a">get</a>();</div></div><!-- fragment --><p> Commonly you might use like this: </p><div class="fragment"><div class="line"> std::string value = doc[<span class="stringliteral">"object A"</span>].<a class="code" href="classejson_1_1_value.html#a43a3bf8ff0d02f92e8751ea8a16fcaa1">toString</a>().<a class="code" href="classejson_1_1_string.html#ad8fa78302b225c6228ee8d971489726a">get</a>();</div></div><!-- fragment --> <h2>Access to a boolean in an Object: </h2>
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<div class="fragment"><div class="line"> <span class="keywordtype">bool</span> value = doc[<span class="stringliteral">"object C"</span>].<a class="code" href="classejson_1_1_value.html#ab759dc22259f15b487a4437df60baf1a">toBoolean</a>().<a class="code" href="classejson_1_1_boolean.html#a4df842959a4ef730174efdd38e21b55f">get</a>();</div></div><!-- fragment --> <h2>Access to a Number in an Object: </h2>
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<div class="fragment"><div class="line"> <span class="keywordtype">double</span> value = doc[<span class="stringliteral">"object D"</span>].<a class="code" href="classejson_1_1_value.html#a40e63375796266399a4297b8d2b96f2c">toNumber</a>().<a class="code" href="classejson_1_1_number.html#afe98a17bc93666be54da54bb5bf1d871">get</a>();</div></div><!-- fragment --><h2>Access to a Array in an Object: </h2>
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<p>Get the Array </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_array.html">ejson::Array</a> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709af1f713c9e000f5d3f280adbd124df4f5">array</a> = doc[<span class="stringliteral">"object E"</span>].<a class="code" href="classejson_1_1_value.html#abf67a6a98c2fb657cff4290cef39b658">toArray</a>();</div></div><!-- fragment --><p> Move threw all element: </p><div class="fragment"><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itArray: array) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itArray);</div><div class="line"> }</div></div><!-- fragment --><p> Move threw all element in C mode: </p><div class="fragment"><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> iii=0; iii<array.size(); ++iii) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << array[iii]);</div><div class="line"> }</div></div><!-- fragment --><h2>Access to a Object in an Object: </h2>
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<p>Get the Object </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_object.html">ejson::Object</a> obj = doc[<span class="stringliteral">"object F"</span>].<a class="code" href="classejson_1_1_value.html#a91236630d37cad7a8d1256835a9448c8">toObject</a>();</div></div><!-- fragment --><p> Move threw all element: </p><div class="fragment"><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itObj: obj) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itObj);</div><div class="line"> }</div></div><!-- fragment --><p> Move threw all element in C mode: </p><div class="fragment"><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> iii=0; iii<obj.size(); ++iii) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << obj[iii]);</div><div class="line"> }</div></div><!-- fragment --><h1>Now we can copy the Object we want </h1>
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<p>ejson manage reference object, then it is possible that 2 part of the software access at the same object/element ...</p>
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<p>You can copy object to separate or duplicate section.</p>
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<p>This is named cloning: </p><div class="fragment"><div class="line"> <a class="code" href="classejson_1_1_value.html">ejson::Value</a> tmpClone = doc[<span class="stringliteral">"object F"</span>].<a class="code" href="classejson_1_1_value.html#af66856fee747c1ee0522c4ddc4a1cb6c">clone</a>();</div></div><!-- fragment --><h1><a class="anchor" id="ejson_tutorial_read_all"></a>
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All example file </h1>
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<div class="fragment"><div class="line"></div><div class="line"><span class="preprocessor">#include <test-debug/debug.hpp></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="ejson_8hpp.html">ejson/ejson.hpp</a>></span></div><div class="line"><span class="preprocessor">#include "read.hpp"</span></div><div class="line"></div><div class="line"></div><div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> readFromFile() {</div><div class="line"> <a class="code" href="classejson_1_1_document.html">ejson::Document</a> doc;</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#ae08ff9bbb26c9b8d2b9572781ecb1380">load</a>(<span class="stringliteral">"DATA:read.json"</span>);</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse ret = "</span> << retParse);</div><div class="line"> TEST_INFO(<span class="stringliteral">"Debug display of the tree:"</span>);</div><div class="line"> doc.<a class="code" href="classejson_1_1_value.html#af897c339ede19f822dac984575d4db50">display</a>();</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> readFromString1() {</div><div class="line"> <a class="code" href="classejson_1_1_document.html">ejson::Document</a> doc;</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse"</span>);</div><div class="line"> std::string stream = <span class="stringliteral">"{"</span></div><div class="line"> <span class="stringliteral">" \"object A\":\"bonjour\","</span></div><div class="line"> <span class="stringliteral">" \"object B\":null,"</span></div><div class="line"> <span class="stringliteral">" \"object C\":true,"</span></div><div class="line"> <span class="stringliteral">" \"object D\":123854.215,"</span></div><div class="line"> <span class="stringliteral">" \"object E\":["</span></div><div class="line"> <span class="stringliteral">" 1,2,3,54,false"</span></div><div class="line"> <span class="stringliteral">" ],"</span></div><div class="line"> <span class="stringliteral">" \"object F\":{"</span></div><div class="line"> <span class="stringliteral">" \"a\":1,"</span></div><div class="line"> <span class="stringliteral">" \"b\":2"</span></div><div class="line"> <span class="stringliteral">" }"</span></div><div class="line"> <span class="stringliteral">"}"</span>;</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#af10b1d008b045520e33fec96d6ca94c1">parse</a>(stream);</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse ret = "</span> << retParse);</div><div class="line"> TEST_INFO(<span class="stringliteral">"Debug display of the tree:"</span>);</div><div class="line"> doc.<a class="code" href="classejson_1_1_value.html#af897c339ede19f822dac984575d4db50">display</a>();</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> readFromString2() {</div><div class="line"> <a class="code" href="classejson_1_1_document.html">ejson::Document</a> doc;</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse"</span>);</div><div class="line"> std::string stream = <span class="stringliteral">"{"</span></div><div class="line"> <span class="stringliteral">" objectA:'bonjour',"</span></div><div class="line"> <span class="stringliteral">" objectB:null,"</span></div><div class="line"> <span class="stringliteral">" objectC:true,"</span></div><div class="line"> <span class="stringliteral">" objectD:123854.215,"</span></div><div class="line"> <span class="stringliteral">" objectE:["</span></div><div class="line"> <span class="stringliteral">" #simple comment one Line"</span></div><div class="line"> <span class="stringliteral">" 1,2,3,54,false"</span></div><div class="line"> <span class="stringliteral">" ],"</span></div><div class="line"> <span class="stringliteral">" objectF:{"</span></div><div class="line"> <span class="stringliteral">" a:1,"</span></div><div class="line"> <span class="stringliteral">" b:2"</span></div><div class="line"> <span class="stringliteral">" }"</span></div><div class="line"> <span class="stringliteral">"}"</span>;</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#af10b1d008b045520e33fec96d6ca94c1">parse</a>(stream);</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse ret = "</span> << retParse);</div><div class="line"> TEST_INFO(<span class="stringliteral">"Debug display of the tree:"</span>);</div><div class="line"> doc.<a class="code" href="classejson_1_1_value.html#af897c339ede19f822dac984575d4db50">display</a>();</div><div class="line">}</div><div class="line"></div><div class="line"></div><div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> readFull() {</div><div class="line"> <a class="code" href="classejson_1_1_document.html">ejson::Document</a> doc;</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse"</span>);</div><div class="line"> <span class="keywordtype">bool</span> retParse = doc.<a class="code" href="classejson_1_1_document.html#ae08ff9bbb26c9b8d2b9572781ecb1380">load</a>(<span class="stringliteral">"DATA:read.json"</span>);</div><div class="line"> TEST_INFO(<span class="stringliteral">"parse ret = "</span> << retParse);</div><div class="line"> TEST_INFO(<span class="stringliteral">"Debug display of the tree:"</span>);</div><div class="line"> doc.<a class="code" href="classejson_1_1_value.html#af897c339ede19f822dac984575d4db50">display</a>();</div><div class="line"> TEST_INFO(<span class="stringliteral">"list of Object:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> it: doc) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << it);</div><div class="line"> <span class="keywordflow">if</span> (it.isObject() == <span class="keyword">true</span>) {</div><div class="line"> <a class="code" href="classejson_1_1_object.html">ejson::Object</a> obj = it.<a class="code" href="classejson_1_1_value.html#a91236630d37cad7a8d1256835a9448c8">toObject</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Object has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (obj.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">false</span>) {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of object:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itObj: obj) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itObj);</div><div class="line"> }</div><div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (it.isArray() == <span class="keyword">true</span>) {</div><div class="line"> <a class="code" href="classejson_1_1_array.html">ejson::Array</a> array = it.<a class="code" href="classejson_1_1_value.html#abf67a6a98c2fb657cff4290cef39b658">toArray</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Array has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (array.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">false</span>) {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of object:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itArray: array) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itArray);</div><div class="line"> }</div><div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (it.isBoolean() == <span class="keyword">true</span>) {</div><div class="line"> <a class="code" href="classejson_1_1_boolean.html">ejson::Boolean</a> <span class="keywordtype">boolean</span> = it.<a class="code" href="classejson_1_1_value.html#ab759dc22259f15b487a4437df60baf1a">toBoolean</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Boolean has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (<span class="keywordtype">boolean</span>.exist() == <span class="keyword">false</span>) {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" boolean Value:"</span> << <span class="keywordtype">boolean</span>.<span class="keyword">get</span>());</div><div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (it.isString() == <span class="keyword">true</span>) {</div><div class="line"> <a class="code" href="classejson_1_1_string.html">ejson::String</a> str = it.<a class="code" href="classejson_1_1_value.html#a43a3bf8ff0d02f92e8751ea8a16fcaa1">toString</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::String has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (str.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">false</span>) {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" String Value:"</span> << str.<a class="code" href="classejson_1_1_string.html#ad8fa78302b225c6228ee8d971489726a">get</a>());</div><div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (it.isNumber() == <span class="keyword">true</span>) {</div><div class="line"> <a class="code" href="classejson_1_1_number.html">ejson::Number</a> num = it.<a class="code" href="classejson_1_1_value.html#a40e63375796266399a4297b8d2b96f2c">toNumber</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Number has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (num.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">false</span>) {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" Number Value:"</span> << num.<a class="code" href="classejson_1_1_number.html#afe98a17bc93666be54da54bb5bf1d871">get</a>());</div><div class="line"> }</div><div class="line"> }</div><div class="line"> </div><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> iii=0; iii<doc.size(); ++iii) {</div><div class="line"> <span class="keywordflow">switch</span> (doc[iii].getType()) {</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709aa8cfde6331bd59eb2ac96f8911c4b666">ejson::valueType::object</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an Object:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709af1f713c9e000f5d3f280adbd124df4f5">ejson::valueType::array</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an Array:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709a84e2c64f38f78ba3ea5c905ab5a2da27">ejson::valueType::boolean</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an Boolean:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709a37a6259cc0c1dae299a7866489dff0bd">ejson::valueType::null</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an Null:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709ab1bc248a7ff2b2e95569f56de68615df">ejson::valueType::number</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an Number:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> <a class="code" href="namespaceejson.html#a6a37b3ae20a2b7bc207b268ab1439709ab45cffe084dd3d20d928bee85e7b0f21">ejson::valueType::string</a>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Get an String:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">default</span>:</div><div class="line"> TEST_INFO(<span class="stringliteral">" Inknow element:"</span> << doc.getKey(iii) );</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> }</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">" Direct get node exml:"</span>);</div><div class="line"> <a class="code" href="classejson_1_1_value.html">ejson::Value</a> element = doc[<span class="stringliteral">"object C"</span>];</div><div class="line"> <span class="keywordflow">if</span> (element.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">false</span>) {</div><div class="line"> TEST_ERROR(<span class="stringliteral">"The element does not exist"</span>);</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Read String:"</span>);</div><div class="line"> {</div><div class="line"> <span class="comment">// you can simply change the type of the exml value if you know what it is:</span></div><div class="line"><span class="comment"></span> <a class="code" href="classejson_1_1_string.html">ejson::String</a> elem = doc[<span class="stringliteral">"object A"</span>].<a class="code" href="classejson_1_1_value.html#a43a3bf8ff0d02f92e8751ea8a16fcaa1">toString</a>();</div><div class="line"> <span class="comment">// Get the value:</span></div><div class="line"> std::string value = elem.<a class="code" href="classejson_1_1_string.html#ad8fa78302b225c6228ee8d971489726a">get</a>();</div><div class="line"> TEST_INFO(<span class="stringliteral">" String Value:"</span> << value);</div><div class="line"> }</div><div class="line"> <span class="comment">// or simply:</span></div><div class="line"> {</div><div class="line"> <span class="comment">// Get the value:</span></div><div class="line"><span class="comment"></span> std::string value = doc[<span class="stringliteral">"object A"</span>].toString().get();</div><div class="line"> TEST_INFO(<span class="stringliteral">" String Value:"</span> << value);</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Read Boolean:"</span>);</div><div class="line"> </div><div class="line"> <span class="comment">// Get a Boolean value:</span></div><div class="line"> {</div><div class="line"> <span class="comment">// Get the value:</span></div><div class="line"><span class="comment"></span> <span class="keywordtype">bool</span> value = doc[<span class="stringliteral">"object C"</span>].toBoolean().get();</div><div class="line"> TEST_INFO(<span class="stringliteral">" Boolean Value:"</span> << value);</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Read Number:"</span>);</div><div class="line"> </div><div class="line"> <span class="comment">// Get a number value:</span></div><div class="line"> {</div><div class="line"> <span class="comment">// Get the value:</span></div><div class="line"><span class="comment"></span> <span class="keywordtype">double</span> value = doc[<span class="stringliteral">"object D"</span>].toNumber().get();</div><div class="line"> TEST_INFO(<span class="stringliteral">" Number Value:"</span> << value);</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Read Array:"</span>);</div><div class="line"> {</div><div class="line"> <a class="code" href="classejson_1_1_array.html">ejson::Array</a> array = doc[<span class="stringliteral">"object E"</span>].<a class="code" href="classejson_1_1_value.html#abf67a6a98c2fb657cff4290cef39b658">toArray</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Array has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (array.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">true</span>) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of Element in Array:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itArray: array) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itArray);</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of Element in Array (C mode):"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> iii=0; iii<array.size(); ++iii) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << array[iii]);</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Read Object:"</span>);</div><div class="line"> {</div><div class="line"> <a class="code" href="classejson_1_1_object.html">ejson::Object</a> obj = doc[<span class="stringliteral">"object F"</span>].<a class="code" href="classejson_1_1_value.html#a91236630d37cad7a8d1256835a9448c8">toObject</a>();</div><div class="line"> <span class="comment">// check if the convertion in ejson::Object has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (obj.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">true</span>) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of Element in Object:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itObj: obj) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itObj);</div><div class="line"> }</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of Element in Object (C mode):"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> iii=0; iii<obj.size(); ++iii) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << obj[iii]);</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> </div><div class="line"> TEST_INFO(<span class="stringliteral">"Clone Object:"</span>);</div><div class="line"> <span class="comment">// in the local system, All element get are not copied but referenced. the to have a copy of an object, you need to clone it :</span></div><div class="line"> {</div><div class="line"> <span class="comment">// Clone object:</span></div><div class="line"><span class="comment"></span> <a class="code" href="classejson_1_1_value.html">ejson::Value</a> tmpClone = doc[<span class="stringliteral">"object F"</span>].<a class="code" href="classejson_1_1_value.html#af66856fee747c1ee0522c4ddc4a1cb6c">clone</a>();</div><div class="line"> <a class="code" href="classejson_1_1_object.html">ejson::Object</a> obj = tmpClone.<a class="code" href="classejson_1_1_value.html#a91236630d37cad7a8d1256835a9448c8">toObject</a>();</div><div class="line"> <span class="comment">// check if the clone and convertion in ejson::Object has been done corectly</span></div><div class="line"> <span class="keywordflow">if</span> (obj.<a class="code" href="classejson_1_1_value.html#a1395a9a11600c8d9d4c0025916d3cb2a">exist</a>() == <span class="keyword">true</span>) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" list of Element in Object:"</span>);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> itObj: obj) {</div><div class="line"> TEST_INFO(<span class="stringliteral">" "</span> << itObj);</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> </div><div class="line">}</div><div class="line"></div><div class="line"><span class="keywordtype">void</span> appl::read() {</div><div class="line"> readFromFile();</div><div class="line"> readFromString1();</div><div class="line"> readFromString1();</div><div class="line"> readFull();</div><div class="line">}</div></div><!-- fragment --> </div></div><!-- contents -->
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