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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>QXmlInputSource 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 QXmlInputSource class provides the input data for the
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| 35 | QXmlReader subclasses.
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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><a href="qxmlinputsource-members.html">List of all member functions.</a>
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| 40 | <h2>Public Members</h2>
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| 41 | <ul>
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| 42 | <li class=fn><a href="#QXmlInputSource"><b>QXmlInputSource</b></a> ()</li>
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| 43 | <li class=fn><a href="#QXmlInputSource-2"><b>QXmlInputSource</b></a> ( QIODevice * dev )</li>
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| 44 | <li class=fn>QXmlInputSource ( QFile & file ) <em>(obsolete)</em></li>
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| 45 | <li class=fn>QXmlInputSource ( QTextStream & stream ) <em>(obsolete)</em></li>
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| 46 | <li class=fn>virtual <a href="#~QXmlInputSource"><b>~QXmlInputSource</b></a> ()</li>
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| 47 | <li class=fn>virtual void <a href="#setData"><b>setData</b></a> ( const QString & dat )</li>
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| 48 | <li class=fn>virtual void <a href="#setData-2"><b>setData</b></a> ( const QByteArray & dat )</li>
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| 49 | <li class=fn>virtual void <a href="#fetchData"><b>fetchData</b></a> ()</li>
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| 50 | <li class=fn>virtual QString <a href="#data"><b>data</b></a> ()</li>
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| 51 | <li class=fn>virtual QChar <a href="#next"><b>next</b></a> ()</li>
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| 52 | <li class=fn>virtual void <a href="#reset"><b>reset</b></a> ()</li>
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| 53 | </ul>
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| 54 | <h2>Protected Members</h2>
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| 55 | <ul>
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| 56 | <li class=fn>virtual QString <a href="#fromRawData"><b>fromRawData</b></a> ( const QByteArray & data, bool beginning = FALSE )</li>
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| 57 | </ul>
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| 58 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 59 |
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| 60 |
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| 61 |
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| 62 | The QXmlInputSource class provides the input data for the
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| 63 | <a href="qxmlreader.html">QXmlReader</a> subclasses.
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| 64 |
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| 65 | <p>
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| 66 |
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| 67 | <p> All subclasses of QXmlReader read the input XML document from this
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| 68 | class.
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| 69 | <p> This class recognizes the encoding of the data by reading the
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| 70 | encoding declaration in the XML file if it finds one, and reading
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| 71 | the data using the corresponding encoding. If it does not find an
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| 72 | encoding declaration, then it assumes that the data is either in
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| 73 | UTF-8 or UTF-16, depending on whether it can find a byte-order
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| 74 | mark.
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| 75 | <p> There are two ways to populate the input source with data: you can
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| 76 | construct it with a <a href="qiodevice.html">QIODevice</a>* so that the input source reads the
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| 77 | data from that device. Or you can set the data explicitly with one
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| 78 | of the <a href="#setData">setData</a>() functions.
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| 79 | <p> Usually you either construct a QXmlInputSource that works on a
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| 80 | QIODevice* or you construct an empty QXmlInputSource and set the
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| 81 | data with setData(). There are only rare occasions where you would
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| 82 | want to mix both methods.
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| 83 | <p> The QXmlReader subclasses use the <a href="#next">next</a>() function to read the
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| 84 | input character by character. If you want to start from the
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| 85 | beginning again, use <a href="#reset">reset</a>().
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| 86 | <p> The functions <a href="#data">data</a>() and <a href="#fetchData">fetchData</a>() are useful if you want to do
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| 87 | something with the data other than parsing, e.g. displaying the
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| 88 | raw XML file. The benefit of using the QXmlInputClass in such
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| 89 | cases is that it tries to use the correct encoding.
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| 90 | <p> <p>See also <a href="qxmlreader.html">QXmlReader</a>, <a href="qxmlsimplereader.html">QXmlSimpleReader</a>, and <a href="xml-tools.html">XML</a>.
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| 91 |
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| 92 | <hr><h2>Member Function Documentation</h2>
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| 93 | <h3 class=fn><a name="QXmlInputSource"></a>QXmlInputSource::QXmlInputSource ()
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| 94 | </h3>
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| 95 | Constructs an input source which contains no data.
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| 96 | <p> <p>See also <a href="#setData">setData</a>().
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| 97 |
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| 98 | <h3 class=fn><a name="QXmlInputSource-2"></a>QXmlInputSource::QXmlInputSource ( <a href="qiodevice.html">QIODevice</a> * dev )
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| 99 | </h3>
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| 100 | Constructs an input source and gets the data from device <em>dev</em>.
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| 101 | If <em>dev</em> is not open, it is opened in read-only mode. If <em>dev</em>
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| 102 | is 0 or it is not possible to read from the device, the input
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| 103 | source will contain no data.
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| 104 | <p> <p>See also <a href="#setData">setData</a>(), <a href="#fetchData">fetchData</a>(), and <a href="qiodevice.html">QIODevice</a>.
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| 105 |
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| 106 | <h3 class=fn><a name="QXmlInputSource-3"></a>QXmlInputSource::QXmlInputSource ( <a href="qfile.html">QFile</a> & file )
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| 107 | </h3> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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| 108 | <p> Constructs an input source and gets the data from the file <em>file</em>. If the
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| 109 | file cannot be read the input source is empty.
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| 110 |
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| 111 | <h3 class=fn><a name="QXmlInputSource-4"></a>QXmlInputSource::QXmlInputSource ( <a href="qtextstream.html">QTextStream</a> & stream )
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| 112 | </h3> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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| 113 | <p> Constructs an input source and gets the data from the text stream <em>stream</em>.
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| 114 |
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| 115 | <h3 class=fn><a name="~QXmlInputSource"></a>QXmlInputSource::~QXmlInputSource ()<tt> [virtual]</tt>
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| 116 | </h3>
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| 117 | Destructor.
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| 118 |
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| 119 | <h3 class=fn><a href="qstring.html">QString</a> <a name="data"></a>QXmlInputSource::data ()<tt> [virtual]</tt>
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| 120 | </h3>
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| 121 | Returns the data the input source contains or <a href="qstring.html#QString-null">QString::null</a> if the
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| 122 | input source does not contain any data.
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| 123 | <p> <p>See also <a href="#setData">setData</a>(), <a href="#QXmlInputSource">QXmlInputSource</a>(), and <a href="#fetchData">fetchData</a>().
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| 124 |
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| 125 | <h3 class=fn>void <a name="fetchData"></a>QXmlInputSource::fetchData ()<tt> [virtual]</tt>
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| 126 | </h3>
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| 127 | This function reads more data from the device that was set during
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| 128 | construction. If the input source already contained data, this
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| 129 | function deletes that data first.
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| 130 | <p> This object contains no data after a call to this function if the
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| 131 | object was constructed without a device to read data from or if
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| 132 | this function was not able to get more data from the device.
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| 133 | <p> There are two occasions where a fetch is done implicitly by
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| 134 | another function call: during construction (so that the object
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| 135 | starts out with some initial data where available), and during a
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| 136 | call to <a href="#next">next</a>() (if the data had run out).
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| 137 | <p> You don't normally need to use this function if you use next().
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| 138 | <p> <p>See also <a href="#data">data</a>(), <a href="#next">next</a>(), and <a href="#QXmlInputSource">QXmlInputSource</a>().
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| 139 |
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| 140 | <h3 class=fn><a href="qstring.html">QString</a> <a name="fromRawData"></a>QXmlInputSource::fromRawData ( const <a href="qbytearray.html">QByteArray</a> & data, bool beginning = FALSE )<tt> [virtual protected]</tt>
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| 141 | </h3>
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| 142 | This function reads the XML file from <em>data</em> and tries to
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| 143 | recognize the encoding. It converts the raw data <em>data</em> into a
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| 144 | <a href="qstring.html">QString</a> and returns it. It tries its best to get the correct
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| 145 | encoding for the XML file.
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| 146 | <p> If <em>beginning</em> is TRUE, this function assumes that the data
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| 147 | starts at the beginning of a new XML document and looks for an
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| 148 | encoding declaration. If <em>beginning</em> is FALSE, it converts the
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| 149 | raw data using the encoding determined from prior calls.
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| 150 |
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| 151 | <h3 class=fn><a href="qchar.html">QChar</a> <a name="next"></a>QXmlInputSource::next ()<tt> [virtual]</tt>
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| 152 | </h3>
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| 153 | Returns the next character of the input source. If this function
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| 154 | reaches the end of available data, it returns
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| 155 | QXmlInputSource::EndOfData. If you call <a href="#next">next</a>() after that, it
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| 156 | tries to fetch more data by calling <a href="#fetchData">fetchData</a>(). If the
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| 157 | fetchData() call results in new data, this function returns the
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| 158 | first character of that data; otherwise it returns
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| 159 | QXmlInputSource::EndOfDocument.
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| 160 | <p> <p>See also <a href="#reset">reset</a>(), <a href="#fetchData">fetchData</a>(), <a href="qxmlsimplereader.html#parse">QXmlSimpleReader::parse</a>(), and <a href="qxmlsimplereader.html#parseContinue">QXmlSimpleReader::parseContinue</a>().
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| 161 |
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| 162 | <h3 class=fn>void <a name="reset"></a>QXmlInputSource::reset ()<tt> [virtual]</tt>
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| 163 | </h3>
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| 164 | This function sets the position used by <a href="#next">next</a>() to the beginning of
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| 165 | the data returned by <a href="#data">data</a>(). This is useful if you want to use the
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| 166 | input source for more than one parse.
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| 167 | <p> <p>See also <a href="#next">next</a>().
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| 168 |
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| 169 | <p>Example: <a href="tagreader-with-features-example.html#x1975">xml/tagreader-with-features/tagreader.cpp</a>.
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| 170 | <h3 class=fn>void <a name="setData"></a>QXmlInputSource::setData ( const <a href="qstring.html">QString</a> & dat )<tt> [virtual]</tt>
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| 171 | </h3>
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| 172 | Sets the data of the input source to <em>dat</em>.
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| 173 | <p> If the input source already contains data, this function deletes
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| 174 | that data first.
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| 175 | <p> <p>See also <a href="#data">data</a>().
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| 176 |
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| 177 | <h3 class=fn>void <a name="setData-2"></a>QXmlInputSource::setData ( const <a href="qbytearray.html">QByteArray</a> & dat )<tt> [virtual]</tt>
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| 178 | </h3>
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| 179 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 180 | <p> The data <em>dat</em> is passed through the correct text-codec, before
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| 181 | it is set.
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| 182 |
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| 183 | <!-- eof -->
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| 184 | <hr><p>
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| 185 | This file is part of the <a href="index.html">Qt toolkit</a>.
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| 186 | Copyright © 1995-2007
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| 187 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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| 188 | <table width=100% cellspacing=0 border=0><tr>
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| 189 | <td>Copyright © 2007
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| 190 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 191 | <td align=right><div align=right>Qt 3.3.8</div>
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| 192 | </table></div></address></body>
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| 193 | </html>
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