Package it.uniroma2.art.semanticturkey.services.core

Class SPARQL

java.lang.Object

it.uniroma2.art.semanticturkey.services.STServiceAdapter

it.uniroma2.art.semanticturkey.services.core.SPARQL

All Implemented Interfaces:

NewerNewStyleService, STService

@STService
public class SPARQL
extends STServiceAdapter

This class provides services for SPARQL queries/updates.

Author:

Manuel Fiorelli

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SPARQL.FederatedEndpointSuggestion

Field Summary

Fields inherited from class it.uniroma2.art.semanticturkey.services.STServiceAdapter

applicationEventPublisher, cfManager, stServiceContext

Constructor Summary

Constructors

Constructor	Description
SPARQL()

Method Summary

Modifier and Type	Method	Description
protected void	configureOperation(boolean includeInferred, Map<String,org.eclipse.rdf4j.model.Value> bindings, int maxExecTime, org.eclipse.rdf4j.model.IRI[] defaultGraphs, org.eclipse.rdf4j.model.IRI[] namedGraphs, org.eclipse.rdf4j.model.IRI defaultInsertGraph, org.eclipse.rdf4j.model.IRI[] defaultRemoveGraphs, org.eclipse.rdf4j.query.Operation preparedUpdate)
com.fasterxml.jackson.databind.JsonNode	evaluateQuery(String query, org.eclipse.rdf4j.query.QueryLanguage ql, boolean includeInferred, Map<String,org.eclipse.rdf4j.model.Value> bindings, int maxExecTime, org.eclipse.rdf4j.model.IRI[] defaultGraphs, org.eclipse.rdf4j.model.IRI[] namedGraphs)	Evaluates a query.
void	executeUpdate(String query, org.eclipse.rdf4j.query.QueryLanguage ql, boolean includeInferred, Map<String,org.eclipse.rdf4j.model.Value> bindings, int maxExecTime, org.eclipse.rdf4j.model.IRI[] defaultGraphs, org.eclipse.rdf4j.model.IRI[] namedGraphs, org.eclipse.rdf4j.model.IRI defaultInsertGraph, org.eclipse.rdf4j.model.IRI[] defaultRemoveGraphs)	Executes an update.
void	exportGraphQueryResultAsRdf(jakarta.servlet.http.HttpServletResponse oRes, String query, org.eclipse.rdf4j.query.QueryLanguage ql, boolean includeInferred, Map<String,org.eclipse.rdf4j.model.Value> bindings, int maxExecTime, org.eclipse.rdf4j.model.IRI[] defaultGraphs, org.eclipse.rdf4j.model.IRI[] namedGraphs, TransformationPipeline filteringPipeline, String outputFormat, PluginSpecification deployerSpec, PluginSpecification reformattingExporterSpec)	Evaluates a graph query and dumps its result (a graph) to an RDF file, using our filtered export mechanism (see Export).
void	exportQueryResultAsSpreadsheet(jakarta.servlet.http.HttpServletResponse oRes, String format, String query, org.eclipse.rdf4j.query.QueryLanguage ql, boolean includeInferred, Map<String,org.eclipse.rdf4j.model.Value> bindings, int maxExecTime, org.eclipse.rdf4j.model.IRI[] defaultGraphs, org.eclipse.rdf4j.model.IRI[] namedGraphs)	Exports the query result as spreadsheet
List<SPARQL.FederatedEndpointSuggestion>	suggestEndpointsForFederation(String query)
protected List<String>	tokenize(String query)

Methods inherited from class it.uniroma2.art.semanticturkey.services.STServiceAdapter

addValue, checkNotLocallyDefined, createQueryBuilder, generateIRI, generateNatureSPARQLSelectPart, generateNatureSPARQLWherePart, generateResourceWithCustomConstructor, getCodaLexModeForSearchFromLexicalizationModel, getDeleteGraph, getGraphFromNature, getInitializedCodaCore, getManagedConnection, getMetadataGraph, getPlatformTransactionManager, getProject, getRepository, getRoleFromNature, getUserNamedGraphs, getWorkingGraph, instantiateSearchStrategy, instantiateSearchStrategy, parseReference, publishResourceDeleted, publishResourceDeleted, removeReifiedValue, retrieveResources, shutDownCodaCore, updateTriplePredicate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SPARQL

public SPARQL()

Method Details

evaluateQuery

@STServiceOperation(method=POST)
@Read
@PreAuthorize("@auth.isAuthorized(\'rdf(sparql)\', \'R\')")
public com.fasterxml.jackson.databind.JsonNode evaluateQuery(String query,
 @Optional(defaultValue="SPARQL")
 org.eclipse.rdf4j.query.QueryLanguage ql,
 @Optional(defaultValue="true")
 boolean includeInferred,
 @Optional(defaultValue="{}")
 Map<String,org.eclipse.rdf4j.model.Value> bindings,
 @Optional(defaultValue="0")
 int maxExecTime,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] defaultGraphs,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] namedGraphs)
                                                      throws IOException

Evaluates a query. The parameters controlling the dataset (i.e. defaultGraphs and namedGraphs) are not orthogonal: see Dataset for an explanation of their meaning.

Parameters:

query - the query

ql - the query language (see QueryLanguage. Default value is SPARQL

includeInferred - indicates whether inferred statements should be included in the evaluation of the query. Default value is true

bindings - variable to value bindings

maxExecTime - maximum execution time measured in seconds (a zero or negative value indicates an unlimited execution time). Default value is 0

defaultGraphs - the graphs that constitute the default graph. The default value is the empty set.

namedGraphs - the graphs that constitute the set of named graphs.

Returns:

Throws:

IOException

executeUpdate

@STServiceOperation(method=POST)
@Write
@PreAuthorize("@auth.isAuthorized(\'rdf(sparql)\', \'U\')")
public void executeUpdate(String query,
 @Optional(defaultValue="SPARQL")
 org.eclipse.rdf4j.query.QueryLanguage ql,
 @Optional(defaultValue="true")
 boolean includeInferred,
 @Optional(defaultValue="{}")
 Map<String,org.eclipse.rdf4j.model.Value> bindings,
 @Optional(defaultValue="0")
 int maxExecTime,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] defaultGraphs,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] namedGraphs,
 @Optional
 org.eclipse.rdf4j.model.IRI defaultInsertGraph,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] defaultRemoveGraphs)

Executes an update. The parameters controlling the dataset (i.e. defaultGraphs, namedGraphs, defaultInsertGraph and defaultRemoveGraphs are not orthogonal): see Dataset for an explanation of their meaning.

Parameters:

query - the query

ql - the query language (see QueryLanguage. Default value is SPARQL

includeInferred - indicates whether inferred statements should be included in the evaluation of the query. Default value is true

bindings - variable to value bindings

maxExecTime - maximum execution time measured in seconds (a zero or negative value indicates an unlimited execution time). Default value is 0

defaultGraphs - the graphs that constitute the default graph. The default value is the empty set.

namedGraphs - the graphs that constitute the set of named graphs.

defaultInsertGraph - the default insert graph to be used. The default value is null.

defaultRemoveGraphs - the default remove graphs.

exportQueryResultAsSpreadsheet

@STServiceOperation(method=POST)
@Read
@PreAuthorize("@auth.isAuthorized(\'rdf(sparql)\', \'R\')")
public void exportQueryResultAsSpreadsheet(jakarta.servlet.http.HttpServletResponse oRes,
 String format,
 String query,
 @Optional(defaultValue="SPARQL")
 org.eclipse.rdf4j.query.QueryLanguage ql,
 @Optional(defaultValue="true")
 boolean includeInferred,
 @Optional(defaultValue="{}")
 Map<String,org.eclipse.rdf4j.model.Value> bindings,
 @Optional(defaultValue="0")
 int maxExecTime,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] defaultGraphs,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] namedGraphs)
                                    throws IOException

Exports the query result as spreadsheet

Parameters:

oRes -

format - xlsx for Microsoft Excel spreadsheet or ods for LibreOffice spreadsheet

query -

ql -

includeInferred -

bindings -

maxExecTime -

defaultGraphs -

namedGraphs -

Throws:

IOException

exportGraphQueryResultAsRdf

@STServiceOperation(method=POST)
@Read
@PreAuthorize("@auth.isAuthorized(\'rdf(sparql)\', \'R\')")
public void exportGraphQueryResultAsRdf(jakarta.servlet.http.HttpServletResponse oRes,
 String query,
 @Optional(defaultValue="SPARQL")
 org.eclipse.rdf4j.query.QueryLanguage ql,
 @Optional(defaultValue="true")
 boolean includeInferred,
 @Optional(defaultValue="{}")
 Map<String,org.eclipse.rdf4j.model.Value> bindings,
 @Optional(defaultValue="0")
 int maxExecTime,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] defaultGraphs,
 @Optional(defaultValue="")
 org.eclipse.rdf4j.model.IRI[] namedGraphs,
 @Optional(defaultValue="[]")
 TransformationPipeline filteringPipeline,
 @Optional
 String outputFormat,
 @Optional
 PluginSpecification deployerSpec,
 @Optional
 PluginSpecification reformattingExporterSpec)
                                 throws IOException,
WrongPropertiesException,
ExportPreconditionViolationException,
IllegalArgumentException,
STPropertyAccessException,
InvalidConfigurationException,
NoSuchExtensionException,
ReformattingException

Evaluates a graph query and dumps its result (a graph) to an RDF file, using our filtered export mechanism (see Export). See evaluateQuery(String, QueryLanguage, boolean, Map, int, IRI[], IRI[]) and Export#export(HttpServletResponse, IRI[], TransformationPipeline, boolean, RDFFormat, boolean) for the meaning of the parameters. The results of the query are stored in a randomly named graph, which would appear in the output if the output format supports named graphs.

Parameters:

oRes -

query -

ql -

includeInferred -

bindings -

maxExecTime -

defaultGraphs -

namedGraphs -

filteringPipeline -

outputFormat -

deployerSpec -

reformattingExporterSpec -

Throws:

IOException

WrongPropertiesException

ClassNotFoundException

ExportPreconditionViolationException

STPropertyAccessException

IllegalArgumentException

InvalidConfigurationException

ReformattingException

NoSuchExtensionException

Exception

configureOperation

protected void configureOperation(boolean includeInferred,
 Map<String,org.eclipse.rdf4j.model.Value> bindings,
 int maxExecTime,
 org.eclipse.rdf4j.model.IRI[] defaultGraphs,
 org.eclipse.rdf4j.model.IRI[] namedGraphs,
 @Nullable
 org.eclipse.rdf4j.model.IRI defaultInsertGraph,
 @Nullable
 org.eclipse.rdf4j.model.IRI[] defaultRemoveGraphs,
 org.eclipse.rdf4j.query.Operation preparedUpdate)

suggestEndpointsForFederation

@STServiceOperation(method=GET)
@Read
@PreAuthorize("@auth.isAuthorized(\'rdf(sparql)\', \'R\')")
public List<SPARQL.FederatedEndpointSuggestion> suggestEndpointsForFederation(String query)
                                                                       throws ProjectAccessException,
PropertyNotFoundException,
InvalidProjectNameException,
IOException

Throws:

ProjectAccessException

PropertyNotFoundException

InvalidProjectNameException

IOException

tokenize

protected List<String> tokenize(String query)
                         throws IOException

Throws:

IOException