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| 6 | <title>QXmlSimpleReader Class</title>
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| 22 | <font color="#004faf">All Classes</font></a>
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QXmlSimpleReader Class Reference<br><small>[<a href="xml.html">XML module</a>]</small></h1>
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| 33 |
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| 34 | <p>The QXmlSimpleReader class provides an implementation of a
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| 35 | simple XML reader (parser).
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| 36 | <a href="#details">More...</a>
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| 37 | <p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when Qt is built with thread support.</p>
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| 38 | <p><tt>#include <<a href="qxml-h.html">qxml.h</a>></tt>
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| 39 | <p>Inherits <a href="qxmlreader.html">QXmlReader</a>.
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| 40 | <p><a href="qxmlsimplereader-members.html">List of all member functions.</a>
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| 41 | <h2>Public Members</h2>
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| 42 | <ul>
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| 43 | <li class=fn><a href="#QXmlSimpleReader"><b>QXmlSimpleReader</b></a> ()</li>
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| 44 | <li class=fn>virtual <a href="#~QXmlSimpleReader"><b>~QXmlSimpleReader</b></a> ()</li>
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| 45 | <li class=fn>virtual void <a href="#setFeature"><b>setFeature</b></a> ( const QString & name, bool value )</li>
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| 46 | <li class=fn>virtual bool <a href="#parse"><b>parse</b></a> ( const QXmlInputSource * input, bool incremental )</li>
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| 47 | <li class=fn>virtual bool <a href="#parseContinue"><b>parseContinue</b></a> ()</li>
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| 48 | </ul>
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| 49 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 50 |
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| 51 |
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| 52 |
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| 53 | The QXmlSimpleReader class provides an implementation of a
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| 54 | simple XML reader (parser).
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| 55 |
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| 56 | <p>
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| 57 |
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| 58 |
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| 59 | <p> This XML reader is sufficient for simple parsing tasks. The reader:
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| 60 | <ul>
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| 61 | <li> provides a well-formed parser;
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| 62 | <li> does not parse any external entities;
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| 63 | <li> can do namespace processing.
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| 64 | </ul>
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| 65 | <p> Documents are parsed with a call to <a href="#parse">parse</a>().
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| 66 | <p> <p>See also <a href="xml-tools.html">XML</a>.
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| 67 |
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| 68 | <hr><h2>Member Function Documentation</h2>
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| 69 | <h3 class=fn><a name="QXmlSimpleReader"></a>QXmlSimpleReader::QXmlSimpleReader ()
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| 70 | </h3>
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| 71 | Constructs a simple XML reader with the following feature settings:
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| 72 | <center><table cellpadding="4" cellspacing="2" border="0">
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| 73 | <tr bgcolor="#a2c511"> <th valign="top">Feature <th valign="top">Setting
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| 74 | <tr bgcolor="#f0f0f0"> <td valign="top"><em>http://xml.org/sax/features/namespaces</em> <td valign="top">TRUE
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| 75 | <tr bgcolor="#d0d0d0"> <td valign="top"><em>http://xml.org/sax/features/namespace-prefixes</em> <td valign="top">FALSE
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| 76 | <tr bgcolor="#f0f0f0"> <td valign="top"><em>http://trolltech.com/xml/features/report-whitespace-only-CharData</em>
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| 77 | <td valign="top">TRUE
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| 78 | <tr bgcolor="#d0d0d0"> <td valign="top"><em>http://trolltech.com/xml/features/report-start-end-entity</em> <td valign="top">FALSE
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| 79 | </table></center>
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| 80 | <p> More information about features can be found in the <a href="xml.html#sax2Features">Qt SAX2 overview.</a>
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| 81 | <p> <p>See also <a href="#setFeature">setFeature</a>().
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| 82 |
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| 83 | <h3 class=fn><a name="~QXmlSimpleReader"></a>QXmlSimpleReader::~QXmlSimpleReader ()<tt> [virtual]</tt>
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| 84 | </h3>
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| 85 | Destroys the simple XML reader.
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| 86 |
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| 87 | <h3 class=fn>bool <a name="parse"></a>QXmlSimpleReader::parse ( const <a href="qxmlinputsource.html">QXmlInputSource</a> * input, bool incremental )<tt> [virtual]</tt>
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| 88 | </h3>
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| 89 | Reads an XML document from <em>input</em> and parses it. Returns FALSE
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| 90 | if the parsing detects an error; otherwise returns TRUE.
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| 91 | <p> If <em>incremental</em> is TRUE, the parser does not return FALSE when
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| 92 | it reaches the end of the <em>input</em> without reaching the end of the
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| 93 | XML file. Instead it stores the state of the parser so that
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| 94 | parsing can be continued at a later stage when more data is
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| 95 | available. You can use the function <a href="#parseContinue">parseContinue</a>() to continue
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| 96 | with parsing. This class stores a pointer to the input source <em>input</em> and the parseContinue() function tries to read from that
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| 97 | input souce. This means that you should not delete the input
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| 98 | source <em>input</em> until you've finished your calls to
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| 99 | parseContinue(). If you call this function with <em>incremental</em>
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| 100 | TRUE whilst an incremental parse is in progress a new parsing
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| 101 | session will be started and the previous session lost.
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| 102 | <p> If <em>incremental</em> is FALSE, this function behaves like the normal
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| 103 | parse function, i.e. it returns FALSE when the end of input is
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| 104 | reached without reaching the end of the XML file and the parsing
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| 105 | cannot be continued.
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| 106 | <p> <p>See also <a href="#parseContinue">parseContinue</a>() and <a href="qsocket.html">QSocket</a>.
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| 107 |
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| 108 | <p>Examples: <a href="tagreader-with-features-example.html#x1976">xml/tagreader-with-features/tagreader.cpp</a> and <a href="tagreader-example.html#x1905">xml/tagreader/tagreader.cpp</a>.
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| 109 | <h3 class=fn>bool <a name="parseContinue"></a>QXmlSimpleReader::parseContinue ()<tt> [virtual]</tt>
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| 110 | </h3>
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| 111 | Continues incremental parsing; this function reads the input from
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| 112 | the <a href="qxmlinputsource.html">QXmlInputSource</a> that was specified with the last <a href="#parse">parse</a>()
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| 113 | command. To use this function, you <em>must</em> have called parse()
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| 114 | with the incremental argument set to TRUE.
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| 115 | <p> Returns FALSE if a parsing error occurs; otherwise returns TRUE.
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| 116 | <p> If the input source returns an empty string for the function
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| 117 | <a href="qxmlinputsource.html#data">QXmlInputSource::data</a>(), then this means that the end of the XML
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| 118 | file has been reached; this is quite important, especially if you
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| 119 | want to use the reader to parse more than one XML file.
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| 120 | <p> The case of the end of the XML file being reached without having
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| 121 | finished parsing is not considered to be an error: you can
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| 122 | continue parsing at a later stage by calling this function again
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| 123 | when there is more data available to parse.
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| 124 | <p> This function assumes that the end of the XML document is reached
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| 125 | if the <a href="qxmlinputsource.html#next">QXmlInputSource::next</a>() function returns
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| 126 | QXmlInputSource::EndOfDocument. If the parser has not finished
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| 127 | parsing when it encounters this symbol, it is an error and FALSE
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| 128 | is returned.
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| 129 | <p> <p>See also <a href="#parse">parse</a>() and <a href="qxmlinputsource.html#next">QXmlInputSource::next</a>().
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| 130 |
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| 131 | <h3 class=fn>void <a name="setFeature"></a>QXmlSimpleReader::setFeature ( const <a href="qstring.html">QString</a> & name, bool value )<tt> [virtual]</tt>
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| 132 | </h3>
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| 133 | Sets the state of the feature <em>name</em> to <em>value</em>:
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| 134 | <p> If the feature is not recognized, it is ignored.
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| 135 | <p> The following features are supported:
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| 136 | <center><table cellpadding="4" cellspacing="2" border="0">
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| 137 | <tr bgcolor="#a2c511"> <th valign="top">Feature <th valign="top">Notes
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| 138 | <tr bgcolor="#f0f0f0"> <td valign="top"><em>http://xml.org/sax/features/namespaces</em>
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| 139 | <td valign="top">If this feature is TRUE, namespace processing is
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| 140 | performed.
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| 141 | <tr bgcolor="#d0d0d0"> <td valign="top"><em>http://xml.org/sax/features/namespace-prefixes</em>
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| 142 | <td valign="top">If this feature is TRUE, the the original prefixed names
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| 143 | and attributes used for namespace declarations are
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| 144 | reported.
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| 145 | <tr bgcolor="#f0f0f0"> <td valign="top"><em>http://trolltech.com/xml/features/report-whitespace-only-CharData</em>
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| 146 | <td valign="top">If this feature is TRUE, CharData that only contain
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| 147 | whitespace are not ignored, but are reported via
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| 148 | <a href="qxmlcontenthandler.html#characters">QXmlContentHandler::characters</a>().
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| 149 | <tr bgcolor="#d0d0d0"> <td valign="top"><em>http://trolltech.com/xml/features/report-start-end-entity</em>
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| 150 | <td valign="top">If this feature is TRUE, the parser reports
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| 151 | QXmlContentHandler::startEntity() and
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| 152 | QXmlContentHandler::endEntity() events. So character data
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| 153 | might be reported in chunks. If this feature is FALSE, the
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| 154 | parser does not report those events, but rather silently
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| 155 | substitutes the entities and reports the character data in
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| 156 | one chunk.
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| 157 | </table></center>
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| 158 | <p>
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| 159 |
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| 160 | <pre> ** $Id: qxmlsimplereader.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 161 | </pre><pre> <a name="x2125"></a> reader.<a href="#setFeature">setFeature</a>( "http://xml.org/sax/features/namespace-prefixes",
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| 162 | TRUE );
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| 163 | </pre>
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| 164 | <p> (Code taken from xml/tagreader-with-features/tagreader.cpp)
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| 165 | <p> <p>See also <a href="qxmlreader.html#feature">feature</a>() and <a href="qxmlreader.html#hasFeature">hasFeature</a>().
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| 166 |
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| 167 | <p>Example: <a href="qxmlsimplereader.html#x2125">xml/tagreader-with-features/tagreader.cpp</a>.
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| 168 | <p>Reimplemented from <a href="qxmlreader.html#setFeature">QXmlReader</a>.
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| 169 | <!-- eof -->
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| 170 | <hr><p>
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| 171 | This file is part of the <a href="index.html">Qt toolkit</a>.
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| 172 | Copyright © 1995-2007
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| 173 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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| 174 | <table width=100% cellspacing=0 border=0><tr>
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| 175 | <td>Copyright © 2007
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| 176 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 177 | <td align=right><div align=right>Qt 3.3.8</div>
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| 178 | </table></div></address></body>
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| 179 | </html>
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