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<td >Qt 5.9</td><td ><a href="qtxml-index.html">Qt XML</a></td><td ><a href="qtxml-module.html">C++ Classes</a></td><td >QXmlEntityResolver</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QXmlEntityResolver Class</h1>
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<p>The <a href="qxmlentityresolver.html">QXmlEntityResolver</a> class provides an interface to resolve external entities contained in XML data. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QXmlEntityResolver></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += xml</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherited By:</td><td class="memItemRight bottomAlign"> <p><a href="qxmldefaulthandler.html">QXmlDefaultHandler</a></p>
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<li><a href="qxmlentityresolver-members.html">List of all members, including inherited members</a></li>
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<p><b>Note:</b> All functions in this class are reentrant.</p>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qxmlentityresolver.html#dtor.QXmlEntityResolver">~QXmlEntityResolver</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qxmlentityresolver.html#errorString">errorString</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlentityresolver.html#resolveEntity">resolveEntity</a></b>(const QString &<i>publicId</i>, const QString &<i>systemId</i>, QXmlInputSource *&<i>ret</i>) = 0</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qxmlentityresolver.html">QXmlEntityResolver</a> class provides an interface to resolve external entities contained in XML data.</p>
<p>If an application needs to implement customized handling for external entities, it must implement this interface, i.e. <a href="qxmlentityresolver.html#resolveEntity">resolveEntity</a>(), and register it with <a href="qxmlreader.html#setEntityResolver">QXmlReader::setEntityResolver</a>().</p>
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<p><b>See also </b><a href="qxmldtdhandler.html">QXmlDTDHandler</a>, <a href="qxmldeclhandler.html">QXmlDeclHandler</a>, <a href="qxmlcontenthandler.html">QXmlContentHandler</a>, <a href="qxmlerrorhandler.html">QXmlErrorHandler</a>, <a href="qxmllexicalhandler.html">QXmlLexicalHandler</a>, and <a href="xml-sax.html#introduction-to-sax2">Introduction to SAX2</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="dtor.QXmlEntityResolver"><a name="dtor.QXmlEntityResolver"></a><code>[virtual] </code>QXmlEntityResolver::<span class="name">~QXmlEntityResolver</span>()</h3>
<p>Destroys the entity resolver.</p>
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<h3 class="fn" id="errorString"><a name="errorString"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qstring.html">QString</a></span> QXmlEntityResolver::<span class="name">errorString</span>() const</h3>
<p>The reader calls this function to get an error string if any of the handler functions returns <code>false</code>.</p>
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<h3 class="fn" id="resolveEntity"><a name="resolveEntity"></a><code>[pure virtual] </code><span class="type">bool</span> QXmlEntityResolver::<span class="name">resolveEntity</span>(const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i>publicId</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i>systemId</i>, <span class="type"><a href="qxmlinputsource.html">QXmlInputSource</a></span> *&<i>ret</i>)</h3>
<p>The reader calls this function before it opens any external entity, except the top-level document entity. The application may request the reader to resolve the entity itself (<i>ret</i> is 0) or to use an entirely different input source (<i>ret</i> points to the input source).</p>
<p>The reader deletes the input source <i>ret</i> when it no longer needs it, so you should allocate it on the heap with <code>new</code>.</p>
<p>The argument <i>publicId</i> is the public identifier of the external entity, <i>systemId</i> is the system identifier of the external entity and <i>ret</i> is the return value of this function. If <i>ret</i> is 0 the reader should resolve the entity itself, if it is non-zero it must point to an input source which the reader uses instead.</p>
<p>If this function returns <code>false</code> the reader stops parsing and reports an error. The reader uses the function <a href="qxmlentityresolver.html#errorString">errorString</a>() to get the error message.</p>
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