Parser Class Reference

from PyKDE4.soprano import *

Inherits: Soprano.Plugin,Soprano::Error::ErrorCache
Namespace: Soprano

Detailed Description

Abstract class:: This class can be used as a base class for new classes, but can not be instantiated directly.

\class Parser parser.h Soprano/Parser

Soprano.Parser defines the interface for a Soprano RDF parser plugin.

Each parser plugin may support multiple RDF serializations (supportedSerializations()).

Usage

Using a Parser is straightforward. One starts by getting a plugin that supports the requested RDF data serialization:

 Soprano.Parser* p = Soprano.PluginManager.instance()->discoverParserForSerialization( Soprano.SerializationRdfXml );

Then parsing RDF data is done in a single method call resulting in a StatementIterator over the resulting graph (since parsers may support multiple serializations one always needs to provide the serialization type unless a parser plugin support autodetection).

 Soprano.StatementIterator it = p->parseFile( "myrdffile.rdf", Soprano.SerializationRdfXml );

\sa soprano_writing_plugins

Author:: Daniele Galdi <daniele.galdi@gmail.com>
Sebastian Trueg <trueg@kde.org>

Methods
	__init__ (self, QString name)
Soprano.StatementIterator	parseFile (self, QString filename, QUrl baseUri, Soprano.RdfSerialization serialization, QString userSerialization=QString())
Soprano.StatementIterator	parseStream (self, QTextStream stream, QUrl baseUri, Soprano.RdfSerialization serialization, QString userSerialization=QString())
Soprano.StatementIterator	parseString (self, QString data, QUrl baseUri, Soprano.RdfSerialization serialization, QString userSerialization=QString())
Soprano.RdfSerializations	supportedSerializations (self)
QStringList	supportedUserSerializations (self)
bool	supportsSerialization (self, Soprano.RdfSerialization s, QString userSerialization=QString())

Method Documentation

__init__	(	self,
		QString	name
	)

Soprano.StatementIterator parseFile	(	self,
		QString	filename,
		QUrl	baseUri,
		Soprano.RdfSerialization	serialization,
		QString	userSerialization=QString()
	)

Parse an RDF model which has been serialized in a file, using the supplied baseURI to resolve any relative URI references.

The default implementation simply calls parseStream() on an opened QFile instance.

Parameters:

filename

The name (path) of the file to parse

Parameters:

baseUri

The base URI to be used for relative references.

Parameters:

serialization

The serialization used in the file.

Parameters:

userSerialization

If serialization is set to Soprano.SerializationUser this parameter specifies the serialization to use. It allows the extension of the %Soprano Parser interface with new RDF serializations that are not officially supported by %Soprano.

Returns:: An iterator that iterates over the result statements.

Soprano.StatementIterator parseStream	(	self,
		QTextStream	stream,
		QUrl	baseUri,
		Soprano.RdfSerialization	serialization,
		QString	userSerialization=QString()
	)

Abstract method:: This method is abstract and can be overridden but not called directly.

Read a serialized RDF model from a test stream, using the supplied baseURI to resolve any relative URI references.

Parameters:

stream

The text stream to read the serialized RDF data from.

Parameters:

baseUri

The base URI to be used for relative references.

Parameters:

serialization

The serialization used for the string data from the stream.

Parameters:

userSerialization

Returns:: An iterator that iterates over the result statements.

Soprano.StatementIterator parseString	(	self,
		QString	data,
		QUrl	baseUri,
		Soprano.RdfSerialization	serialization,
		QString	userSerialization=QString()
	)

Parse an RDF model which has been serialized into a string, using the supplied baseURI to resolve any relative URI references.

The default implementation simply calls parseStream().

Parameters:

data

The serialized RDF string.

Parameters:

baseUri

The base URI to be used for relative references.

Parameters:

serialization

The serialization used for the string data.

Parameters:

userSerialization

Returns:: An iterator that iterates over the result statements.

Soprano.RdfSerializations supportedSerializations ( self )

Abstract method:: This method is abstract and can be overridden but not called directly.

The serialiazation types supported by this parser.

Returns:: A combination of Soprano.RdfSerialization types. If the list contains Soprano.SerializationUser the parser supports additional RDF serialiazations not officially supported by %Soprano.

QStringList supportedUserSerializations ( self )

A parser can support additional RDF serializations that are not defined in Soprano.RdfSerialization. In that case supportedSerializations() has to include Soprano.SerializationUser.

The default implementation returns an empty list.

Returns:: A list of supported user RDF serializations.

bool supportsSerialization	(	self,
		Soprano.RdfSerialization	s,
		QString	userSerialization=QString()
	)

Check if a plugin supports a specific serialization.

Parameters:

The requested serialization.

Parameters:

userSerialization

If serialization is set to Soprano.SerializationUser this parameter specifies the requested serialization. It allows the extension of the %Soprano Parser interface with new RDF serializations that are not officially supported by %Soprano.

Returns:: true if the parser is able to parse RDF data encoded in serialization s, false otherwise.

Parser Class Reference

Detailed Description

Methods

Method Documentation

Modules