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       QXmlInputSource - The input data for the QXmlReader subclasses


       All the functions in this class are reentrant when Qt is built with thread support.</p>

       #include <qxml.h>

   Public Members
       QXmlInputSource ()
       QXmlInputSource ( QIODevice * dev )
       QXmlInputSource ( QFile & file )  (obsolete)
       QXmlInputSource ( QTextStream & stream )  (obsolete)
       virtual ~QXmlInputSource ()
       virtual void setData ( const QString & dat )
       virtual void setData ( const QByteArray & dat )
       virtual void fetchData ()
       virtual QString data ()
       virtual QChar next ()
       virtual void reset ()

   Protected Members
       virtual QString fromRawData ( const QByteArray & data, bool beginning = FALSE )


       The QXmlInputSource class provides the input data for the QXmlReader subclasses.

       All subclasses of QXmlReader read the input XML document from this class.

       This class recognizes the encoding of the data by reading the encoding declaration in the
       XML file if it finds one, and reading the data using the corresponding encoding. If it
       does not find an encoding declaration, then it assumes that the data is either in UTF-8 or
       UTF-16, depending on whether it can find a byte-order mark.

       There are two ways to populate the input source with data: you can construct it with a
       QIODevice* so that the input source reads the data from that device. Or you can set the
       data explicitly with one of the setData() functions.

       Usually you either construct a QXmlInputSource that works on a QIODevice* or you construct
       an empty QXmlInputSource and set the data with setData(). There are only rare occasions
       where you would want to mix both methods.

       The QXmlReader subclasses use the next() function to read the input character by
       character. If you want to start from the beginning again, use reset().

       The functions data() and fetchData() are useful if you want to do something with the data
       other than parsing, e.g. displaying the raw XML file. The benefit of using the
       QXmlInputClass in such cases is that it tries to use the correct encoding.

       See also QXmlReader, QXmlSimpleReader, and XML.


QXmlInputSource::QXmlInputSource ()

       Constructs an input source which contains no data.

       See also setData().

QXmlInputSource::QXmlInputSource ( QIODevice * dev )

       Constructs an input source and gets the data from device dev. If dev is not open, it is
       opened in read-only mode. If dev is 0 or it is not possible to read from the device, the
       input source will contain no data.

       See also setData(), fetchData(), and QIODevice.

QXmlInputSource::QXmlInputSource ( QFile & file )

       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       Constructs an input source and gets the data from the file file. If the file cannot be
       read the input source is empty.

QXmlInputSource::QXmlInputSource ( QTextStream & stream )

       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       Constructs an input source and gets the data from the text stream stream.

QXmlInputSource::~QXmlInputSource () [virtual]


QString QXmlInputSource::data () [virtual]

       Returns the data the input source contains or QString::null if the input source does not
       contain any data.

       See also setData(), QXmlInputSource(), and fetchData().

void QXmlInputSource::fetchData () [virtual]

       This function reads more data from the device that was set during construction. If the
       input source already contained data, this function deletes that data first.

       This object contains no data after a call to this function if the object was constructed
       without a device to read data from or if this function was not able to get more data from
       the device.

       There are two occasions where a fetch is done implicitly by another function call: during
       construction (so that the object starts out with some initial data where available), and
       during a call to next() (if the data had run out).

       You don't normally need to use this function if you use next().

       See also data(), next(), and QXmlInputSource().

QString QXmlInputSource::fromRawData ( const QByteArray & data, bool beginning = FALSE ) [virtual

       This function reads the XML file from data and tries to recognize the encoding. It
       converts the raw data data into a QString and returns it. It tries its best to get the
       correct encoding for the XML file.

       If beginning is TRUE, this function assumes that the data starts at the beginning of a new
       XML document and looks for an encoding declaration. If beginning is FALSE, it converts the
       raw data using the encoding determined from prior calls.

QChar QXmlInputSource::next () [virtual]

       Returns the next character of the input source. If this function reaches the end of
       available data, it returns QXmlInputSource::EndOfData. If you call next() after that, it
       tries to fetch more data by calling fetchData(). If the fetchData() call results in new
       data, this function returns the first character of that data; otherwise it returns

       See also reset(), fetchData(), QXmlSimpleReader::parse(), and

void QXmlInputSource::reset () [virtual]

       This function sets the position used by next() to the beginning of the data returned by
       data(). This is useful if you want to use the input source for more than one parse.

       See also next().

       Example: xml/tagreader-with-features/tagreader.cpp.

void QXmlInputSource::setData ( const QString & dat ) [virtual]

       Sets the data of the input source to dat.

       If the input source already contains data, this function deletes that data first.

       See also data().

void QXmlInputSource::setData ( const QByteArray & dat ) [virtual]

       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       The data dat is passed through the correct text-codec, before it is set.



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