Java Code Examples for org.eclipse.rdf4j.model.ValueFactory#createLiteral()
The following examples show how to use
org.eclipse.rdf4j.model.ValueFactory#createLiteral() .
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Example 1
| Source File: ConvertSpinRDFToString.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length < 1 || args.length > 2) {
throw new ValueExprEvaluationException("Incorrect number of arguments");
}
if (!(args[0] instanceof Resource)) {
throw new ValueExprEvaluationException("First argument must be the root of a SPIN RDF query");
}
if (args.length == 2 && !(args[1] instanceof Literal)) {
throw new ValueExprEvaluationException("Second argument must be a string");
}
Resource q = (Resource) args[0];
boolean useHtml = (args.length == 2) ? ((Literal) args[1]).booleanValue() : false;
String sparqlString;
try {
ParsedOperation op = parser.parse(q, getCurrentQueryPreparer().getTripleSource());
sparqlString = new SPARQLQueryRenderer().render((ParsedQuery) op);
} catch (Exception e) {
throw new ValueExprEvaluationException(e);
}
return valueFactory.createLiteral(sparqlString);
}
Example 2
| Source File: GeoTemporalProviderTest.java From rya with Apache License 2.0 | 6 votes |
|
@Test
public void onePatternTwoFilters_test() throws Exception {
final ValueFactory vf = SimpleValueFactory.getInstance();
final Value geo = vf.createLiteral("Point(0 0)", GeoConstants.XMLSCHEMA_OGC_WKT);
final Value temp = vf.createLiteral(new TemporalInstantRfc3339(2015, 12, 30, 12, 00, 0).toString());
final IRI tempPred = vf.createIRI(URI_PROPERTY_AT_TIME);
final String query =
"PREFIX geo: <http://www.opengis.net/ont/geosparql#>" +
"PREFIX geos: <http://www.opengis.net/def/function/geosparql/>" +
"PREFIX time: <tag:rya-rdf.org,2015:temporal#>" +
"SELECT * WHERE { " +
"?subj <" + tempPred + "> ?time ."+
" FILTER(geos:sfContains(?loc, " + geo + ")) . " +
" FILTER(time:equals(?time, " + temp + ")) . " +
"}";
final QuerySegment<EventQueryNode> node = getQueryNode(query);
final List<EventQueryNode> nodes = provider.getExternalSets(node);
assertEquals(0, nodes.size());
}
Example 3
| Source File: DecodeURL.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length < 1 || args.length > 2) {
throw new ValueExprEvaluationException("Incorrect number of arguments");
}
if (!(args[0] instanceof Literal)) {
throw new ValueExprEvaluationException("First argument must be a string");
}
if (args.length == 2 && !(args[1] instanceof Literal)) {
throw new ValueExprEvaluationException("Second argument must be a string");
}
Literal s = (Literal) args[0];
String encoding = (args.length == 2) ? ((Literal) args[1]).getLabel() : "UTF-8";
try {
return valueFactory.createLiteral(URLDecoder.decode(s.getLabel(), encoding));
} catch (UnsupportedEncodingException e) {
throw new ValueExprEvaluationException(e);
}
}
Example 4
| Source File: GeometricBinaryFunction.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length != 2) {
throw new ValueExprEvaluationException(getURI() + " requires exactly 2 arguments, got " + args.length);
}
SpatialContext geoContext = SpatialSupport.getSpatialContext();
Shape geom1 = FunctionArguments.getShape(this, args[0], geoContext);
Shape geom2 = FunctionArguments.getShape(this, args[1], geoContext);
String wkt;
try {
Shape result = operation(geom1, geom2);
wkt = SpatialSupport.getWktWriter().toWkt(result);
} catch (IOException | RuntimeException e) {
throw new ValueExprEvaluationException(e);
}
return valueFactory.createLiteral(wkt, GEO.WKT_LITERAL);
}
Example 5
| Source File: GeometricRelationFunction.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length != 2) {
throw new ValueExprEvaluationException(getURI() + " requires exactly 2 arguments, got " + args.length);
}
SpatialContext geoContext = SpatialSupport.getSpatialContext();
Shape geom1 = FunctionArguments.getShape(this, args[0], geoContext);
Shape geom2 = FunctionArguments.getShape(this, args[1], geoContext);
try {
boolean result = relation(geom1, geom2);
return valueFactory.createLiteral(result);
} catch (RuntimeException e) {
throw new ValueExprEvaluationException("error evaluating geospatial relation", e);
}
}
Example 6
| Source File: EvaluationStrategyTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 6 votes |
|
@Test
public void testDatetimeSubtypesStrict() {
ValueFactory vf = strictRepo.getValueFactory();
try (RepositoryConnection conn = strictRepo.getConnection()) {
Literal l1 = vf.createLiteral("2009", XMLSchema.GYEAR);
Literal l2 = vf.createLiteral("2009-01", XMLSchema.GYEARMONTH);
IRI s1 = vf.createIRI("urn:s1");
IRI s2 = vf.createIRI("urn:s2");
conn.add(s1, RDFS.LABEL, l1);
conn.add(s2, RDFS.LABEL, l2);
String query = "SELECT * WHERE { ?s rdfs:label ?l . FILTER(?l >= \"2008\"^^xsd:gYear) }";
List<BindingSet> result = QueryResults.asList(conn.prepareTupleQuery(query).evaluate());
assertEquals(1, result.size());
}
}
Example 7
| Source File: Hours.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
@Override
public Literal evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length != 1) {
throw new ValueExprEvaluationException("HOURS requires 1 argument, got " + args.length);
}
Value argValue = args[0];
if (argValue instanceof Literal) {
Literal literal = (Literal) argValue;
IRI datatype = literal.getDatatype();
if (datatype != null && XMLDatatypeUtil.isCalendarDatatype(datatype)) {
try {
XMLGregorianCalendar calValue = literal.calendarValue();
int hours = calValue.getHour();
if (DatatypeConstants.FIELD_UNDEFINED != hours) {
return valueFactory.createLiteral(String.valueOf(hours), XMLSchema.INTEGER);
} else {
throw new ValueExprEvaluationException("can not determine hours from value: " + argValue);
}
} catch (IllegalArgumentException e) {
throw new ValueExprEvaluationException("illegal calendar value: " + argValue);
}
} else {
throw new ValueExprEvaluationException("unexpected input value for function: " + argValue);
}
} else {
throw new ValueExprEvaluationException("unexpected input value for function: " + args[0]);
}
}
Example 8
| Source File: GeoIndexerTest.java From rya with Apache License 2.0 | 5 votes |
|
@Test
public void testDcSearchWithSubject() throws Exception {
// test a ring around dc
try (final GeoMesaGeoIndexer f = new GeoMesaGeoIndexer()) {
f.setConf(conf);
final ValueFactory vf = SimpleValueFactory.getInstance();
final Resource subject = vf.createIRI("foo:subj");
final IRI predicate = GeoConstants.GEO_AS_WKT;
final Value object = vf.createLiteral("Point(-77.03524 38.889468)", GeoConstants.XMLSCHEMA_OGC_WKT);
final Resource context = vf.createIRI("foo:context");
final Statement statement = vf.createStatement(subject, predicate, object, context);
f.storeStatement(convertStatement(statement));
f.flush();
final double[] IN = { -78, 39, -77, 39, -77, 38, -78, 38, -78, 39 };
final LinearRing r1 = gf.createLinearRing(new PackedCoordinateSequence.Double(IN, 2));
final Polygon p1 = gf.createPolygon(r1, new LinearRing[] {});
// query with correct subject
Assert.assertEquals(Sets.newHashSet(statement), getSet(f.queryWithin(p1, new StatementConstraints().setSubject(subject))));
// query with wrong subject
Assert.assertEquals(Sets.newHashSet(), getSet(f.queryWithin(p1, new StatementConstraints().setSubject(vf.createIRI("foo:subj2")))));
}
}
Example 9
| Source File: Rand.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
@Override
public Literal evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length != 0) {
throw new ValueExprEvaluationException("RAND requires 0 arguments, got " + args.length);
}
Random randomGenerator = new Random();
double randomValue = randomGenerator.nextDouble();
return valueFactory.createLiteral(randomValue);
}
Example 10
| Source File: NamespacesController.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
private ModelAndView getExportNamespacesResult(HttpServletRequest request, HttpServletResponse response)
throws ClientHTTPException, ServerHTTPException {
final boolean headersOnly = METHOD_HEAD.equals(request.getMethod());
Map<String, Object> model = new HashMap<>();
if (!headersOnly) {
List<String> columnNames = Arrays.asList("prefix", "namespace");
List<BindingSet> namespaces = new ArrayList<>();
try (RepositoryConnection repositoryCon = RepositoryInterceptor.getRepositoryConnection(request)) {
final ValueFactory vf = repositoryCon.getValueFactory();
try {
try (CloseableIteration<? extends Namespace, RepositoryException> iter = repositoryCon
.getNamespaces()) {
while (iter.hasNext()) {
Namespace ns = iter.next();
Literal prefix = vf.createLiteral(ns.getPrefix());
Literal namespace = vf.createLiteral(ns.getName());
BindingSet bindingSet = new ListBindingSet(columnNames, prefix, namespace);
namespaces.add(bindingSet);
}
}
} catch (RepositoryException e) {
throw new ServerHTTPException("Repository error: " + e.getMessage(), e);
}
}
model.put(QueryResultView.QUERY_RESULT_KEY, new IteratingTupleQueryResult(columnNames, namespaces));
}
TupleQueryResultWriterFactory factory = ProtocolUtil.getAcceptableService(request, response,
TupleQueryResultWriterRegistry.getInstance());
model.put(QueryResultView.FILENAME_HINT_KEY, "namespaces");
model.put(QueryResultView.HEADERS_ONLY, headersOnly);
model.put(QueryResultView.FACTORY_KEY, factory);
return new ModelAndView(TupleQueryResultView.getInstance(), model);
}
Example 11
| Source File: GeoIndexerTest.java From rya with Apache License 2.0 | 5 votes |
|
@Test
public void testDcSearchWithSubjectAndContext() throws Exception {
// test a ring around dc
try (final GeoMesaGeoIndexer f = new GeoMesaGeoIndexer()) {
f.setConf(conf);
final ValueFactory vf = SimpleValueFactory.getInstance();
final Resource subject = vf.createIRI("foo:subj");
final IRI predicate = GeoConstants.GEO_AS_WKT;
final Value object = vf.createLiteral("Point(-77.03524 38.889468)", GeoConstants.XMLSCHEMA_OGC_WKT);
final Resource context = vf.createIRI("foo:context");
final Statement statement = vf.createStatement(subject, predicate, object, context);
f.storeStatement(convertStatement(statement));
f.flush();
final double[] IN = { -78, 39, -77, 39, -77, 38, -78, 38, -78, 39 };
final LinearRing r1 = gf.createLinearRing(new PackedCoordinateSequence.Double(IN, 2));
final Polygon p1 = gf.createPolygon(r1, new LinearRing[] {});
// query with correct context subject
Assert.assertEquals(Sets.newHashSet(statement),
getSet(f.queryWithin(p1, new StatementConstraints().setContext(context).setSubject(subject))));
// query with wrong context
Assert.assertEquals(Sets.newHashSet(),
getSet(f.queryWithin(p1, new StatementConstraints().setContext(vf.createIRI("foo:context2")))));
// query with wrong subject
Assert.assertEquals(Sets.newHashSet(), getSet(f.queryWithin(p1, new StatementConstraints().setSubject(vf.createIRI("foo:subj2")))));
}
}
Example 12
| Source File: QueryIT.java From rya with Apache License 2.0 | 5 votes |
|
@Test
public void dateTimeWithinNow() throws Exception {
final ValueFactory vf = SimpleValueFactory.getInstance();
final DatatypeFactory dtf = DatatypeFactory.newInstance();
FunctionRegistry.getInstance().add(new DateTimeWithinPeriod());
final String sparql = "PREFIX fn: <" + FN.NAMESPACE +">"
+ "SELECT ?event ?startTime WHERE { ?event <uri:startTime> ?startTime. "
+ "FILTER(fn:dateTimeWithin(?startTime, NOW(), 30, <" + OWLTime.SECONDS_URI + "> ))}";
final ZonedDateTime zTime = ZonedDateTime.now();
final String time = zTime.format(DateTimeFormatter.ISO_INSTANT);
final ZonedDateTime zTime1 = zTime.minusSeconds(30);
final String time1 = zTime1.format(DateTimeFormatter.ISO_INSTANT);
final Literal lit = vf.createLiteral(dtf.newXMLGregorianCalendar(time));
final Literal lit1 = vf.createLiteral(dtf.newXMLGregorianCalendar(time1));
// Create the Statements that will be loaded into Rya.
final Collection<Statement> statements = Sets.newHashSet(
vf.createStatement(vf.createIRI("uri:event1"), vf.createIRI("uri:startTime"), lit),
vf.createStatement(vf.createIRI("uri:event2"), vf.createIRI("uri:startTime"), lit1)
);
// Create the expected results of the SPARQL query once the PCJ has been computed.
final Set<BindingSet> expectedResults = new HashSet<>();
final MapBindingSet bs = new MapBindingSet();
bs.addBinding("event", vf.createIRI("uri:event1"));
bs.addBinding("startTime", lit);
expectedResults.add(bs);
// Verify the end results of the query match the expected results.
runTest(sparql, statements, expectedResults, ExportStrategy.RYA);
}
Example 13
| Source File: Literals.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
/**
* Creates a typed {@link Literal} out of the supplied object, mapping the runtime type of the object to the
* appropriate XML Schema type. If no mapping is available, the method throws an exception if the boolean parameter
* is true, or if it is false it returns a literal with the string representation of the supplied object as the
* value, and {@link XMLSchema#STRING} as the datatype. Recognized types are {@link Boolean}, {@link Byte},
* {@link Double}, {@link Float}, {@link Integer}, {@link Long}, {@link Short}, {@link XMLGregorianCalendar } , and
* {@link Date}.
*
* @param valueFactory The {@link ValueFactory} to use when creating the result.
* @param object an object to be converted to a typed literal.
* @param throwExceptionOnFailure If true throws a {@link LiteralUtilException} when the object is not recognised.
* If false it returns a string typed literal based on the objects toString method.
* @return a typed literal representation of the supplied object.
* @throws LiteralUtilException If the literal could not be created.
* @throws NullPointerException If the object was null.
*/
private static Literal createLiteral(ValueFactory valueFactory, Object object, boolean throwExceptionOnFailure)
throws LiteralUtilException {
if (object == null) {
throw new NullPointerException("Cannot create a literal from a null");
}
if (object instanceof Boolean) {
return valueFactory.createLiteral(((Boolean) object).booleanValue());
} else if (object instanceof Byte) {
return valueFactory.createLiteral(((Byte) object).byteValue());
} else if (object instanceof Double) {
return valueFactory.createLiteral(((Double) object).doubleValue());
} else if (object instanceof Float) {
return valueFactory.createLiteral(((Float) object).floatValue());
} else if (object instanceof Integer) {
return valueFactory.createLiteral(((Integer) object).intValue());
} else if (object instanceof Long) {
return valueFactory.createLiteral(((Long) object).longValue());
} else if (object instanceof Short) {
return valueFactory.createLiteral(((Short) object).shortValue());
} else if (object instanceof XMLGregorianCalendar) {
return valueFactory.createLiteral((XMLGregorianCalendar) object);
} else if (object instanceof Date) {
return valueFactory.createLiteral((Date) object);
} else if (object instanceof String) {
return valueFactory.createLiteral(object.toString(), XMLSchema.STRING);
} else {
if (throwExceptionOnFailure) {
throw new LiteralUtilException("Did not recognise object when creating literal");
}
return valueFactory.createLiteral(object.toString(), XMLSchema.STRING);
}
}
Example 14
| Source File: GeoIndexerTest.java From rya with Apache License 2.0 | 5 votes |
|
@Test
public void testDcSearch() throws Exception {
// test a ring around dc
try (final GeoMesaGeoIndexer f = new GeoMesaGeoIndexer()) {
f.setConf(conf);
final ValueFactory vf = SimpleValueFactory.getInstance();
final Resource subject = vf.createIRI("foo:subj");
final IRI predicate = GeoConstants.GEO_AS_WKT;
final Value object = vf.createLiteral("Point(-77.03524 38.889468)", GeoConstants.XMLSCHEMA_OGC_WKT);
final Resource context = vf.createIRI("foo:context");
final Statement statement = vf.createStatement(subject, predicate, object, context);
f.storeStatement(convertStatement(statement));
f.flush();
final double[] IN = { -78, 39, -77, 39, -77, 38, -78, 38, -78, 39 };
final LinearRing r1 = gf.createLinearRing(new PackedCoordinateSequence.Double(IN, 2));
final Polygon p1 = gf.createPolygon(r1, new LinearRing[] {});
Assert.assertEquals(Sets.newHashSet(statement), getSet(f.queryWithin(p1, EMPTY_CONSTRAINTS)));
// test a ring outside the point
final double[] OUT = { -77, 39, -76, 39, -76, 38, -77, 38, -77, 39 };
final LinearRing rOut = gf.createLinearRing(new PackedCoordinateSequence.Double(OUT, 2));
final Polygon pOut = gf.createPolygon(rOut, new LinearRing[] {});
Assert.assertEquals(Sets.newHashSet(), getSet(f.queryWithin(pOut, EMPTY_CONSTRAINTS)));
}
}
Example 15
| Source File: Minutes.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
@Override
public Literal evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
if (args.length != 1) {
throw new ValueExprEvaluationException("MINUTES requires 1 argument, got " + args.length);
}
Value argValue = args[0];
if (argValue instanceof Literal) {
Literal literal = (Literal) argValue;
IRI datatype = literal.getDatatype();
if (datatype != null && XMLDatatypeUtil.isCalendarDatatype(datatype)) {
try {
XMLGregorianCalendar calValue = literal.calendarValue();
int minutes = calValue.getMinute();
if (DatatypeConstants.FIELD_UNDEFINED != minutes) {
return valueFactory.createLiteral(String.valueOf(minutes), XMLSchema.INTEGER);
} else {
throw new ValueExprEvaluationException("can not determine minutes from value: " + argValue);
}
} catch (IllegalArgumentException e) {
throw new ValueExprEvaluationException("illegal calendar value: " + argValue);
}
} else {
throw new ValueExprEvaluationException("unexpected input value for function: " + argValue);
}
} else {
throw new ValueExprEvaluationException("unexpected input value for function: " + args[0]);
}
}
Example 16
| Source File: ConversionUtil.java From semweb4j with BSD 2-Clause "Simplified" License | 4 votes |
|
public static org.eclipse.rdf4j.model.Literal toRDF4J(LanguageTagLiteral literal, ValueFactory factory) {
return literal == null ? null : factory.createLiteral(literal.getValue(), literal.getLanguageTag());
}
Example 17
| Source File: CurrentTimeMillis.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
return valueFactory.createLiteral(System.currentTimeMillis());
}
Example 18
| Source File: Random.java From rdf4j with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
return valueFactory.createLiteral(Math.random());
}
Example 19
| Source File: KBInstance.java From inception with Apache License 2.0 | 4 votes |
|
public void write(RepositoryConnection aConn, KnowledgeBase kb)
{
ValueFactory vf = aConn.getValueFactory();
IRI subject = vf.createIRI(identifier);
originalStatements.clear();
Statement typeStmt = vf.createStatement(subject, kb.getTypeIri(),
vf.createIRI(type.toString()));
originalStatements.add(typeStmt);
aConn.add(typeStmt);
if (isNotBlank(name)) {
Literal nameLiteral;
if (language != null) {
nameLiteral = vf.createLiteral(name, language);
}
else if (kb.getDefaultLanguage() != null) {
nameLiteral = vf.createLiteral(name, kb.getDefaultLanguage());
}
else {
nameLiteral = vf.createLiteral(name);
}
Statement nameStmt = vf.createStatement(subject, kb.getLabelIri(), nameLiteral);
originalStatements.add(nameStmt);
aConn.add(nameStmt);
}
if (isNotBlank(description)) {
Literal descriptionLiteral;
if (language == null) {
descriptionLiteral = vf.createLiteral(description);
}
else {
descriptionLiteral = vf.createLiteral(description, language);
}
Statement descStmt = vf
.createStatement(subject, kb.getDescriptionIri(), descriptionLiteral);
originalStatements.add(descStmt);
aConn.add(descStmt);
}
}
Example 20
| Source File: KBConcept.java From inception with Apache License 2.0 | 4 votes |
|
public void write(RepositoryConnection aConn, KnowledgeBase kb)
{
ValueFactory vf = aConn.getValueFactory();
IRI subject = vf.createIRI(identifier);
originalStatements.clear();
Statement typeStmt = vf.createStatement(subject, kb.getTypeIri(), kb.getClassIri());
originalStatements.add(typeStmt);
aConn.add(typeStmt);
if (isNotBlank(name)) {
Literal nameLiteral;
if (language != null) {
nameLiteral = vf.createLiteral(name, language);
}
else if (kb.getDefaultLanguage() != null) {
nameLiteral = vf.createLiteral(name, kb.getDefaultLanguage());
}
else {
nameLiteral = vf.createLiteral(name);
}
Statement nameStmt = vf.createStatement(subject, kb.getLabelIri(), nameLiteral);
originalStatements.add(nameStmt);
aConn.add(nameStmt);
}
if (isNotBlank(description)) {
Literal descriptionLiteral;
if (language == null) {
descriptionLiteral = vf.createLiteral(description);
}
else {
descriptionLiteral = vf.createLiteral(description, language);
}
Statement descStmt = vf
.createStatement(subject, kb.getDescriptionIri(), descriptionLiteral);
originalStatements.add(descStmt);
aConn.add(descStmt);
}
/* Commented out until the functionality which uses them is actually implemented
Statement closedStmt = vf.createStatement(subject, CLOSED, vf.createLiteral(closed));
originalStatements.add(closedStmt);
aConn.add(closedStmt);
Statement abstractStmt = vf
.createStatement(subject, ABSTRACT, vf.createLiteral(abstractClass));
originalStatements.add(abstractStmt);
aConn.add(abstractStmt);
*/
}
