knowrob::SPARQLService Class Reference

#include <SPARQLService.h>

Inheritance diagram for knowrob::SPARQLService:

Collaboration diagram for knowrob::SPARQLService:

Public Member Functions
	SPARQLService (const URI &uri, semweb::TripleFormat format)
	SPARQLService (const URI &uri, std::string_view format)
bool	load (const TripleHandler &callback) override
	SPARQLService (const URI &uri, semweb::TripleFormat format)
	SPARQLService (const URI &uri, std::string_view format)
bool	load (const TripleHandler &callback) override
Public Member Functions inherited from knowrob::OntologySource
	OntologySource (const URI &uri, std::string_view format)
virtual	~OntologySource ()=default
void	setFrame (const GraphSelectorPtr &frame)
const auto &	frame () const
void	setParentOrigin (std::string_view parentOrigin)
auto &	parentOrigin () const
std::string_view	origin () const
const auto &	imports () const
void	setImports (const std::vector< std::string > &imports)
	OntologySource (const URI &uri, std::string_view format)
virtual	~OntologySource ()=default
void	setFrame (const GraphSelectorPtr &frame)
const auto &	frame () const
void	setParentOrigin (std::string_view parentOrigin)
auto &	parentOrigin () const
std::string_view	origin () const
const auto &	imports () const
void	setImports (const std::vector< std::string > &imports)
Public Member Functions inherited from knowrob::DataSource
	DataSource (URI uri, std::string_view format, DataSourceType dataSourceType)
const auto &	uri () const
const auto &	path () const
const auto &	format () const
DataSourceType	dataSourceType () const
auto	name () const
auto	version () const
	DataSource (URI uri, std::string_view format, DataSourceType dataSourceType)
const auto &	uri () const
const auto &	path () const
const auto &	format () const
DataSourceType	dataSourceType () const
auto	name () const
auto	version () const

Protected Attributes
RedlandModel	model_
Protected Attributes inherited from knowrob::OntologySource
GraphSelectorPtr	frame_
std::optional< std::string >	parentOrigin_
std::string	origin_
std::vector< std::string >	imports_
Protected Attributes inherited from knowrob::DataSource
DataSourceType	dataSourceType_
std::string	format_
URI	uri_

Additional Inherited Members
Static Public Member Functions inherited from knowrob::DataSource
static std::string	getNameFromURI (const std::string &uriString)
static std::string	getVersionFromURI (const std::string &uriString)
static bool	isVersionString (const std::string &versionString)
static std::shared_ptr< DataSource >	create (const VocabularyPtr &vocabulary, const boost::property_tree::ptree &config)
static std::string	getNameFromURI (const std::string &uriString)
static std::string	getVersionFromURI (const std::string &uriString)
static bool	isVersionString (const std::string &versionString)
static std::shared_ptr< DataSource >	create (const VocabularyPtr &vocabulary, const boost::property_tree::ptree &config)

Detailed Description

A SPARQL service is a data service that can be queried for triples.

Definition at line 19 of file SPARQLService.h.

Constructor & Destructor Documentation

SPARQLService() [1/4]

SPARQLService::SPARQLService	(	const URI &	uri,
		semweb::TripleFormat	format
	)

Parameters

uri	the URI of the SPARQL endpoint.
format	the format of the triples in the endpoint.

Definition at line 11 of file SPARQLService.cpp.

        : SPARQLService::SPARQLService(uri, semweb::tripleFormatToString(format)) {
}

SPARQLService() [2/4]

SPARQLService::SPARQLService	(	const URI &	uri,
		std::string_view	format
	)

s

Parameters

uri	the URI of the SPARQL endpoint.
format	the format of the triples in the endpoint.

Definition at line 15 of file SPARQLService.cpp.

        : OntologySource(uri, format) {
    // create a Redland model for the SPARQL endpoint
    // Note that the model has interfaces for insert and remove triples, these won't
    // interact with the SPARQL endpoint, but with the local storage of the model.
    model_.setStorageType(RedlandStorageType::MEMORY);
    model_.setOrigin(origin_);
    if (!model_.initializeBackend()) {
        throw StorageError("Failed to initialize Redland backend for SPARQL endpoint at \"{}\".", uri());
    }
    // set up the model to interface with the SPARQL endpoint
    if (!model_.load(uri, semweb::tripleFormatFromString(format))) {
        throw StorageError("Failed to load URI of SPARQL endpoint at \"{}\".", uri());
    }
}

SPARQLService() [3/4]

knowrob::SPARQLService::SPARQLService	(	const URI &	uri,
		semweb::TripleFormat	format
	)

Parameters

uri	the URI of the SPARQL endpoint.
format	the format of the triples in the endpoint.

SPARQLService() [4/4]

knowrob::SPARQLService::SPARQLService	(	const URI &	uri,
		std::string_view	format
	)

s

Parameters

uri	the URI of the SPARQL endpoint.
format	the format of the triples in the endpoint.

Member Function Documentation

load() [1/2]

bool SPARQLService::load ( const TripleHandler &  callback )

overridevirtual

Load triples from the SPARQL endpoint.

Parameters

callback

the callback to handle the triples.

Returns

true if the triples were loaded successfully.

Implements knowrob::OntologySource.

Definition at line 31 of file SPARQLService.cpp.

                                                      {
    // iterate over all triples in the SPARQL endpoint
    model_.batch(callback);
    return true;
}

load() [2/2]

bool knowrob::SPARQLService::load ( const TripleHandler &  callback )

overridevirtual

Load triples from the SPARQL endpoint.

Parameters

callback

the callback to handle the triples.

Returns

true if the triples were loaded successfully.

Implements knowrob::OntologySource.

Member Data Documentation

model_

RedlandModel knowrob::SPARQLService::model_

protected

Definition at line 37 of file SPARQLService.h.

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The documentation for this class was generated from the following files:

• build/_CPack_Packages/Linux/DEB/knowrob-2.1.0-Linux/usr/include/knowrob/semweb/SPARQLService.h
• src/semweb/SPARQLService.cpp