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Referencia de la Clase QXmlInputSource

The QXmlInputSource class provides the input data for the QXmlReader subclasses.XMLAll subclasses of QXmlReader read the input XML document from this class. Más...

#include <qxml.h>

Lista de todos los miembros.

Métodos públicos

 QXmlInputSource ()
 QXmlInputSource (QIODevice *dev)
 QXmlInputSource (QFile &file)
 QXmlInputSource (QTextStream &stream)
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 ()
 QXmlInputSource ()
 QXmlInputSource (QIODevice *dev)
 QXmlInputSource (QFile &file)
 QXmlInputSource (QTextStream &stream)
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 ()

Atributos públicos estáticos

static const QChar EndOfData = QChar((ushort)0xfffe)
static const QChar EndOfDocument = QChar((ushort)0xffff)

Métodos protegidos

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

Descripción detallada

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

XML

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.

Ver también:
QXmlReader QXmlSimpleReader

Documentación del constructor y destructor

QXmlInputSource::QXmlInputSource ( )

Constructs an input source which contains no data.

Ver también:
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.

Ver también:
setData() fetchData() QIODevice
QXmlInputSource::QXmlInputSource ( QFile file)

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)

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

QXmlInputSource::~QXmlInputSource ( ) [virtual]

Destructor.

QXmlInputSource::QXmlInputSource ( )
QXmlInputSource::QXmlInputSource ( QIODevice dev)
QXmlInputSource::QXmlInputSource ( QFile file)
QXmlInputSource::QXmlInputSource ( QTextStream stream)
virtual QXmlInputSource::~QXmlInputSource ( ) [virtual]

Documentación de las funciones miembro

QString QXmlInputSource::data ( ) [virtual]

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

Ver también:
setData() QXmlInputSource() fetchData()
virtual QString QXmlInputSource::data ( ) [virtual]
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().

Ver también:
data() next() QXmlInputSource()
virtual void QXmlInputSource::fetchData ( ) [virtual]
QString QXmlInputSource::fromRawData ( const QByteArray data,
bool  beginning = FALSE 
) [protected, 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.

virtual QString QXmlInputSource::fromRawData ( const QByteArray data,
bool  beginning = FALSE 
) [protected, virtual]
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 QXmlInputSource::EndOfDocument.

Ver también:
reset() fetchData() QXmlSimpleReader::parse() QXmlSimpleReader::parseContinue()
virtual QChar QXmlInputSource::next ( ) [virtual]
virtual void QXmlInputSource::reset ( ) [virtual]
void QXmlInputSource::reset ( void  ) [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.

Ver también:
next()
virtual void QXmlInputSource::setData ( const QByteArray dat) [virtual]
void QXmlInputSource::setData ( const QByteArray dat) [virtual]

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. The data dat is passed through the correct text-codec, before it is set.

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.

Ver también:
data()
virtual void QXmlInputSource::setData ( const QString dat) [virtual]

Documentación de los datos miembro

static const QChar QXmlInputSource::EndOfData = QChar((ushort)0xfffe) [static]
static const QChar QXmlInputSource::EndOfDocument = QChar((ushort)0xffff) [static]

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