The QXmlSerializer class is an implementation of QAbstractXmlReceiver for transforming XQuery output into unformatted XML. 更多...
头: | #include <QXmlSerializer> |
qmake: | QT += xmlpatterns |
Since: | Qt 4.4 |
继承: | QAbstractXmlReceiver |
继承者: |
该类在 Qt 4.4 引入。
注意: 此类的所有函数 可重入 .
QXmlSerializer (const QXmlQuery & query , QIODevice * outputDevice ) | |
const QTextCodec * | codec () const |
QIODevice * | outputDevice () const |
void | setCodec (const QTextCodec * outputCodec ) |
virtual void | atomicValue (const QVariant & value ) override |
virtual void | 属性 (const QXmlName & name , const QStringRef & value ) override |
virtual void | characters (const QStringRef & value ) override |
virtual void | comment (const QString & value ) override |
virtual void | endDocument () override |
virtual void | endElement () override |
virtual void | endOfSequence () override |
virtual void | namespaceBinding (const QXmlName & nb ) override |
virtual void | processingInstruction (const QXmlName & name , const QString & value ) override |
virtual void | startDocument () override |
virtual void | startElement (const QXmlName & name ) override |
virtual void | startOfSequence () override |
QXmlSerializer translates an XQuery sequence , usually the output of an QXmlQuery , into XML. Consider the example:
QXmlQuery query; query.setQuery("doc('index.html')/html/body/p[1]"); QXmlSerializer serializer(query, myOutputDevice); query.evaluateTo(&serializer);
First it constructs a
query
that gets the first paragraph from document
index.html
. Then it constructs an instance of this class with the
query
and
myOutputDevice
. Finally, it
evaluates
the
query
, producing an ordered sequence of calls to the serializer's callback functions. The sequence of callbacks transforms the query output to XML and writes it to
myOutputDevice
.
QXmlSerializer will:
If an error occurs during serialization, result is undefined unless the serializer is driven through a call to QXmlQuery::evaluateTo ().
If the generated XML should be indented and formatted for reading, use QXmlFormatter .
另请参阅 XSLT 2.0 and XQuery 1.0 Serialization and QXmlFormatter .
Constructs a serializer that uses the name pool and message handler in query , and writes the output to outputDevice .
outputDevice must be a valid, non-null device that is open in write mode, otherwise behavior is undefined.
outputDevice must not be opened with QIODevice::Text because it will cause the output to be incorrect. This class will ensure line endings are serialized as according with the XML specification. QXmlSerializer does not take ownership of outputDevice .
[override virtual]
void
QXmlSerializer::
atomicValue
(const
QVariant
&
value
)
重实现: QAbstractXmlReceiver::atomicValue (const QVariant &value).
[override virtual]
void
QXmlSerializer::
属性
(const
QXmlName
&
name
, const
QStringRef
&
value
)
重实现: QAbstractXmlReceiver::attribute (const QXmlName &name, const QStringRef &value).
[override virtual]
void
QXmlSerializer::
characters
(const
QStringRef
&
value
)
重实现: QAbstractXmlReceiver::characters (const QStringRef &value).
Returns the codec being used by the serializer for encoding its XML output.
另请参阅 setCodec ().
[override virtual]
void
QXmlSerializer::
comment
(const
QString
&
value
)
重实现: QAbstractXmlReceiver::comment (const QString &value).
[override virtual]
void
QXmlSerializer::
endDocument
()
重实现: QAbstractXmlReceiver::endDocument ().
[override virtual]
void
QXmlSerializer::
endElement
()
重实现: QAbstractXmlReceiver::endElement ().
[override virtual]
void
QXmlSerializer::
endOfSequence
()
重实现: QAbstractXmlReceiver::endOfSequence ().
[override virtual]
void
QXmlSerializer::
namespaceBinding
(const
QXmlName
&
nb
)
重实现: QAbstractXmlReceiver::namespaceBinding (const QXmlName &name).
Returns a pointer to the output device. There is no corresponding function to set the output device, because the output device must be passed to the constructor. The serializer does not take ownership of its IO device.
[override virtual]
void
QXmlSerializer::
processingInstruction
(const
QXmlName
&
name
, const
QString
&
value
)
重实现: QAbstractXmlReceiver::processingInstruction (const QXmlName &target, const QString &value).
Sets the codec the serializer will use for encoding its XML output. The output codec is set to
outputCodec
. By default, the output codec is set to the one for
UTF-8
. The serializer does not take ownership of the codec.
另请参阅 codec ().
[override virtual]
void
QXmlSerializer::
startDocument
()
重实现: QAbstractXmlReceiver::startDocument ().
[override virtual]
void
QXmlSerializer::
startElement
(const
QXmlName
&
name
)
重实现: QAbstractXmlReceiver::startElement (const QXmlName &name).
[override virtual]
void
QXmlSerializer::
startOfSequence
()