org.apache.jena.rdf.model.Literal Java Examples

/**
 * converts a {@link Node} into an {l@ink Expr}
 * @param n
 * @return
 */
protected Expr	toExpr(Node n) {
	if (n.isVariable()) {
		return new VariableExpr(n.getName());
	} else if (n.isURI()) {
		try {
			return new ConstantExpr(new URI(n.getURI()));
		} catch (URISyntaxException e) {
			throw new RuntimeException(e);
		}
	} else if (n.isLiteral()) {
		Literal l = (Literal) n;
		return new ConstantExpr(l.getValue());
	} else {
		throw new RuntimeException("Unsuported node type in query : "+n);
	}
}
 

/**
 * Adds some basic metadata to the given RDF model.
 * This method may be overridden in subclasses.
 * @param model
 */
public void addMetadata( final Model model )
{
    final Resource datasetId = model.createResource( getDatasetURI() );
    final Resource fragmentId = model.createResource( fragmentURL );

    datasetId.addProperty( CommonResources.RDF_TYPE, CommonResources.VOID_DATASET );
    datasetId.addProperty( CommonResources.RDF_TYPE, CommonResources.HYDRA_COLLECTION );
    datasetId.addProperty( CommonResources.VOID_SUBSET, fragmentId );
    
    Literal itemsPerPage = model.createTypedLiteral(this.getMaxPageSize());
    datasetId.addProperty( CommonResources.HYDRA_ITEMSPERPAGE, itemsPerPage);

    fragmentId.addProperty( CommonResources.RDF_TYPE, CommonResources.HYDRA_COLLECTION );
    fragmentId.addProperty( CommonResources.RDF_TYPE, CommonResources.HYDRA_PAGEDCOLLECTION );
}
 

public Literal getTypedContent(String con) {
	try {

		return ResourceFactory.createTypedLiteral(Double.valueOf(con));
		// return "\"" + Double.valueOf(con) + "\"^^xsd:double";
	} catch (java.lang.NumberFormatException e) {
		try {
			return ResourceFactory.createTypedLiteral(Float.valueOf(con));
			// return "\"" + Float.valueOf(con) + "\"^^xsd:float";
		} catch (Exception e2) {
			return ResourceFactory.createTypedLiteral(String.valueOf(con));
			// return "\"" + con + "\"^^xsd:string";
		}
	}

}
 

@Override
public void addMetadata( final Model model )
{
    super.addMetadata( model );

    final Resource fragmentId = model.createResource( fragmentURL );

    final Literal totalTyped = model.createTypedLiteral( totalSize,
                                                  XSDDatatype.XSDinteger );
    final Literal limitTyped = model.createTypedLiteral( getMaxPageSize(),
                                                  XSDDatatype.XSDinteger );

    fragmentId.addLiteral( CommonResources.VOID_TRIPLES, totalTyped );
    fragmentId.addLiteral( CommonResources.HYDRA_TOTALITEMS, totalTyped );
    fragmentId.addLiteral( CommonResources.HYDRA_ITEMSPERPAGE, limitTyped );
}
 

/**
 * For use with {@link #sparql(String)} Extracts answer strings. Can be directly set as golden answers in an IQuestion.
 *
 * @param answers
 * @return
 */
public static Set<String> extractAnswerStrings(final Set<RDFNode> answers) {
	Set<String> set = Sets.newHashSet();
	for (RDFNode answ : answers) {
		if (answ.isResource()) {
			set.add(answ.asResource().getURI());
		} else if (answ.isLiteral()) {
			Literal l = (Literal) answ;
			try {
				set.add(l.getString());
			} catch (Exception e) {
				e.printStackTrace();
				set.add(l.getLexicalForm());
			}

		} else {
			set.add(answ.toString());
		}
	}
	return set;
}
 

private static void parseN3(GrabMappingsHandler handler, String infileurl) {
  Model model = ModelFactory.createDefaultModel();
  model.read(infileurl, "N3");

  AResourceImpl sub = new AResourceImpl();
  AResourceImpl pred = new AResourceImpl();
  AResourceImpl objres = new AResourceImpl();
  ALiteralImpl objlit = new ALiteralImpl();
  StmtIterator it = model.listStatements();
  while (it.hasNext()) {
    Statement stmt = it.nextStatement();
    RDFNode object = stmt.getObject();
    sub.setResource(stmt.getSubject());
    pred.setResource(stmt.getPredicate());
    
    if (object instanceof Literal) {
      objlit.setLiteral((Literal) object);
      handler.statement(sub, pred, objlit);
    } else {
      objres.setResource((Resource) object);
      handler.statement(sub, pred, objres);
    }
  }
}
 

public Literal getTypedContent(String con) {
	try {

		return ResourceFactory.createTypedLiteral(Double.valueOf(con));
		// return "\"" + Double.valueOf(con) + "\"^^xsd:double";
	} catch (java.lang.NumberFormatException e) {
		try {
			return ResourceFactory.createTypedLiteral(Float.valueOf(con));
			// return "\"" + Float.valueOf(con) + "\"^^xsd:float";
		} catch (Exception e2) {
			return ResourceFactory.createTypedLiteral(String.valueOf(con));
			// return "\"" + con + "\"^^xsd:string";
		}
	}

}
 

protected Map<String, String> getNameValueMap(Resource resource, UriTemplateParser parser)
{
    if (resource == null) throw new IllegalArgumentException("Resource cannot be null");
    if (parser == null) throw new IllegalArgumentException("UriTemplateParser cannot be null");

    Map<String, String> nameValueMap = new HashMap<>();
    
    List<String> names = parser.getNames();
    for (String name : names)
    {
        Literal literal = getLiteral(resource, name);
        if (literal != null) nameValueMap.put(name, literal.getString());
    }

    return nameValueMap;
}
 

public HashMap<String, String> lexToURI(){
		StmtIterator iter = ontology.listStatements(new SimpleSelector(null, ontology.getProperty(NS+"#lex"),(Literal)null));
		
		
		HashMap<String, String> ontoConcepts=new HashMap<String,String>();
		
		while (iter.hasNext()) {
			
			Statement stmt = iter.nextStatement();
			Resource  subject   = stmt.getSubject();     // get the subject
			RDFNode lex = stmt.getObject();
			StmtIterator iter2 = ontology.listStatements(new SimpleSelector(
					subject, 
					ontology.getProperty("http://www.w3.org/2000/01/rdf-schema#subClassOf"),
					ontology.getResource(this.URI_Mention)));
			if (iter2.hasNext()){
				ontoConcepts.put(lex.toString(), subject.getURI());
			} else {
				System.out.println("No subclass of Mention: "+subject.toString());
				
			}
//			
		}
		return ontoConcepts;
	}
 

@Override
protected Indexable buildNext(Statement statement) {
    InstanceEntity instanceEntity = createInstance(applyNS(statement.getSubject().getURI()));
    PropertyEntity propertyEntity = createProperty(applyNS(statement.getPredicate().getURI()));

    LabeledEntity labeledEntity;

    if (!statement.getObject().isLiteral()) {
        //Is created as an instance but can be changed to a class down on the workflow in EntityClassifierProcessor.
        labeledEntity = createInstance(applyNS(statement.getObject().asResource().getURI()));
    } else {
        Literal literal = statement.getObject().asLiteral();
        String dataType = literal.getDatatypeURI();
        String langTag = literal.getLanguage();
        String value = literal.getLexicalForm();
        labeledEntity = new ValueEntity(value, dataType, langTag);
    }


    return new Indexable(new Fact(kbId, instanceEntity, propertyEntity, labeledEntity), kbId);
}
 

private Map<String, String> extractResultMap(QuerySolution qs, List<String> vars) {
	Map<String, String> resultMap = new HashMap<>();

	for (String var : vars) {
		RDFNode node = qs.get(var);
		if (node != null) {
			if (node instanceof Literal) {
				resultMap.put(var, ((Literal)node).getLexicalForm());
			} else {
				resultMap.put(var, node.toString());
			}
		}
	}
	
	return resultMap;
}
 

/**
 * Test of getNameValueMap method, of class Skolemizer.
 */
@Test
public void testGetNameValueMap()
{
    UriTemplateParser parser = new UriTemplateParser("{name}/{title}|{smth}|{primaryTopic.title}");
    Model model = ModelFactory.createDefaultModel();
    Literal secondTitle = model.createLiteral("Second");
    Literal firstTitle = model.createLiteral("First");

    Resource second = model.createResource().
            addLiteral(DCTerms.title, secondTitle);
    Resource first = model.createResource().
            addLiteral(DCTerms.title, firstTitle).
            addProperty(FOAF.primaryTopic, second);
    
    Map<String, String> expected = new HashMap<>();
    expected.put("title", firstTitle.getString());
    expected.put("primaryTopic.title", secondTitle.getString());
    
    Map<String, String> result = skolemizer.getNameValueMap(first, parser);
    assertEquals(expected, result);
}
 

public static String formatNode(RDFNode node) {
    if (node.isURIResource()) {
        return "<" + node.asResource().getURI().trim().replace(" ", "") + ">";
    }
    if (node.isLiteral()){
        Literal value = node.asLiteral();
        String formattedValue = "\"" + value.getLexicalForm() + "\"";
        if (!value.getLanguage().isEmpty()) {
            formattedValue += "@" + value.getLanguage() ;
        }
        if (!value.getDatatypeURI().isEmpty()
                && !value.getDatatypeURI().endsWith("langString")
                && !value.getDatatypeURI().equals("http://www.w3.org/2001/XMLSchema#string")) {
            formattedValue += "^^<" + value.getDatatypeURI() + ">" ;
        }

        return  formattedValue;
    }
    throw new IllegalArgumentException("cannot support blank nodes as targets");
}
 

/**
 * Test of getLiteral method, of class Skolemizer.
 */
@Test
public void testGetLiteral()
{
    Model model = ModelFactory.createDefaultModel();
    Literal secondTitle = model.createLiteral("Second");
    Literal firstTitle = model.createLiteral("First");

    Resource second = model.createResource().
            addLiteral(DCTerms.title, secondTitle);
    Resource first = model.createResource().
            addLiteral(DCTerms.title, firstTitle).
            addProperty(FOAF.primaryTopic, second);
    
    Literal firstResult = skolemizer.getLiteral(first, "title");
    assertEquals(firstTitle, firstResult);
    Literal secondResult = skolemizer.getLiteral(first, "primaryTopic.title");
    assertEquals(secondTitle, secondResult);
    Literal resultFail1 = skolemizer.getLiteral(first, "primaryTopic");
    assertNull(resultFail1); // primaryTopic is a resource, not a literal
    Literal resultFail2 = skolemizer.getLiteral(first, "whatever");
    assertNull(resultFail2); // no such property
}
 

protected Literal getLiteral(Resource resource, String namePath)
{
    if (resource == null) throw new IllegalArgumentException("Resource cannot be null");

    if (namePath.contains("."))
    {
        String name = namePath.substring(0, namePath.indexOf("."));
        String nameSubPath = namePath.substring(namePath.indexOf(".") + 1);
        Resource subResource = getResource(resource, name);
        if (subResource != null) return getLiteral(subResource, nameSubPath);
    }
    
    StmtIterator it = resource.listProperties();
    try
    {
        while (it.hasNext())
        {
            Statement stmt = it.next();
            if (stmt.getObject().isLiteral() && stmt.getPredicate().getLocalName().equals(namePath))
            {
                if (log.isTraceEnabled()) log.trace("Found Literal {} for property name: {} ", stmt.getLiteral(), namePath);
                return stmt.getLiteral();
            }
        }
    }
    finally
    {
        it.close();
    }
    
    return null;
}
 

private Literal convert(ALiteral lit) {
  String dt = lit.getDatatypeURI();
  if (dt == null)
    return model.createLiteral(lit.toString(), lit.getLang());
  else
    return model.createTypedLiteral(lit.toString(), dt);
}
 

public ExtendedIterator<RDFNode> evalReverse(RDFNode valueNode, NodeExpressionContext context) {
	// See isReversible, this only supports trivial cases for now
	if(isInverse) {
		if(valueNode instanceof Literal) {
			return WrappedIterator.emptyIterator();
		}
		else {
			return context.getDataset().getDefaultModel().listObjectsOfProperty((Resource)valueNode, predicate);
		}
	}
	else {
		return context.getDataset().getDefaultModel().listSubjectsWithProperty(predicate, valueNode).mapWith(r -> (RDFNode)r);
	}
}
 

public static Literal withSubstitutions(Literal template, QuerySolution bindings, Function<RDFNode,String> labelFunction) {
	StringBuffer buffer = new StringBuffer();
	String labelTemplate = template.getLexicalForm();
	for(int i = 0; i < labelTemplate.length(); i++) {
		if(i < labelTemplate.length() - 3 && labelTemplate.charAt(i) == '{' && (labelTemplate.charAt(i + 1) == '?' || labelTemplate.charAt(i + 1) == '$')) {
			int varEnd = i + 2;
			while(varEnd < labelTemplate.length()) {
				if(labelTemplate.charAt(varEnd) == '}') {
					String varName = labelTemplate.substring(i + 2, varEnd);
					RDFNode varValue = bindings.get(varName);
					if(varValue != null) {
						if(labelFunction != null) {
							buffer.append(labelFunction.apply(varValue));
						}
						else if(varValue instanceof Resource) {
							buffer.append(RDFLabels.get().getLabel((Resource)varValue));
						}
						else if(varValue instanceof Literal) {
							buffer.append(varValue.asNode().getLiteralLexicalForm());
						}
					}
					break;
				}
				else {
					varEnd++;
				}
			}
			i = varEnd;
		}
		else {
			buffer.append(labelTemplate.charAt(i));
		}
	}
	if(template.getLanguage().isEmpty()) {
		return ResourceFactory.createTypedLiteral(buffer.toString());
	}
	else {
		return ResourceFactory.createLangLiteral(buffer.toString(), template.getLanguage());
	}
}
 

public static List<Literal> getLiteralProperties(Resource subject, Property predicate) {
	List<Literal> results = new LinkedList<>();
	StmtIterator it = subject.listProperties(predicate);
	while(it.hasNext()) {
		Statement s = it.next();
		if(s.getObject().isLiteral()) {
			results.add(s.getLiteral());
		}
	}
	return results;
}
 

public static Literal getBestStringLiteral(Resource resource, List<String> langs, Iterable<Property> properties, BiFunction<Resource,Property,Iterator<Statement>> getter) {
	Literal label = null;
	int bestLang = -1;
	for(Property predicate : properties) {
		Iterator<Statement> it = getter.apply(resource, predicate);
		while(it.hasNext()) {
			RDFNode object = it.next().getObject();
			if(object.isLiteral()) {
				Literal literal = (Literal)object;
				String lang = literal.getLanguage();
				if(lang.length() == 0 && label == null) {
					label = literal;
				}
				else {
					// 1) Never use a less suitable language
					// 2) Never replace an already existing label (esp: skos:prefLabel) unless new lang is better
					// 3) Fall back to more special languages if no other was found (e.g. use en-GB if only "en" is accepted)
					int startLang = bestLang < 0 ? langs.size() - 1 : (label != null ? bestLang - 1 : bestLang);
					for(int i = startLang; i >= 0; i--) {
						String langi = langs.get(i);
						if(langi.equals(lang)) {
							label = literal;
							bestLang = i;
						}
						else if(lang.contains("-") && NodeFunctions.langMatches(lang, langi) && label == null) {
							label = literal;
						}
					}
				}
			}
		}
	}
	return label;
}
 

private void doConversion(Model model) throws JenaException {
  StatementHandler totm = new ToTMStatementHandler();
  AResourceWrapper subjw = new AResourceWrapper();
  AResourceWrapper propw = new AResourceWrapper();
  AResourceWrapper objtw = new AResourceWrapper();
  ALiteralWrapper litlw = new ALiteralWrapper();

  ResIterator it = model.listSubjects();
  while (it.hasNext()) {
    Resource subject = (Resource) it.next();

    StmtIterator it2 = subject.listProperties(); // get all statements
    while (it2.hasNext()) {
      Statement stmt = (Statement) it2.next();

      subjw.resource = stmt.getSubject();
      propw.resource = stmt.getPredicate();

      RDFNode obj = stmt.getObject();
      if (obj instanceof Resource) {
        objtw.resource = (Resource) obj;
        totm.statement(subjw, propw, objtw);
      } else {
        litlw.literal = (Literal) obj;
        totm.statement(subjw, propw, litlw);
      }
    }
  }
}
 

/**
 * Renders a template call's label template into a label by inserting the
 * evaluated SPARQL expressions into appropriate spaces marked with {expression}.
 * Currently only simple variables are supported, e.g. {?test }. 
 * @param buffer  the StringBuffer to write to
 * @param labelTemplate  the labelTemplate
 * @param args  the arguments  a Map of pre-bound variables (supplied arguments)
 */
public static void appendTemplateCallLabel(StringBuffer buffer, String labelTemplate, Map<String, RDFNode> args) {
	for(int i = 0; i < labelTemplate.length(); i++) {
		if(i < labelTemplate.length() - 3 && labelTemplate.charAt(i) == '{' && labelTemplate.charAt(i + 1) == '?') {
			int varEnd = i + 2;
			while(varEnd < labelTemplate.length()) {
				if(labelTemplate.charAt(varEnd) == '}') {
					String varName = labelTemplate.substring(i + 2, varEnd);
					RDFNode varValue = args.get(varName);
					if(varValue instanceof Resource) {
						buffer.append(get().getLabel((Resource)varValue));
					}
					else if(varValue instanceof Literal) {
						buffer.append(varValue.asNode().getLiteralLexicalForm());
					}
					break;
				}
				else {
					varEnd++;
				}
			}
			i = varEnd;
		}
		else {
			buffer.append(labelTemplate.charAt(i));
		}
	}
}
 

/**
 * typed content type 가져오기
 * @param con
 * @return Literal
 */
public Literal getTypedContent(String con) {
	try {

		return ResourceFactory.createTypedLiteral(Double.valueOf(con));
	} catch (java.lang.NumberFormatException e) {
		try {
			return ResourceFactory.createTypedLiteral(Float.valueOf(con));
		} catch (Exception e2) {
			return ResourceFactory.createTypedLiteral(String.valueOf(con));
		}
	}

}
 

/**
 * typed content type 가져오기
 * @param con
 * @return Literal
 */
public Literal getTypedContent(String con) {
	try {

		return ResourceFactory.createTypedLiteral(Double.valueOf(con));
	} catch (java.lang.NumberFormatException e) {
		try {
			return ResourceFactory.createTypedLiteral(Float.valueOf(con));
		} catch (Exception e2) {
			return ResourceFactory.createTypedLiteral(String.valueOf(con));
		}
	}

}
 

private FieldType getDefaultFieldType(Literal literal) {
	if (literal.getValue().getClass().equals(Character.class) ||
			literal.getValue().getClass().equals(Boolean.class) ||
			literal.getValue().getClass().equals(Date.class) ||
			literal.getValue().getClass().equals(Timestamp.class) ||
			literal.getValue().getClass().equals(Byte.class) ||
			literal.getValue().getClass().equals(String.class)
			) {
		return FieldType.ATTRIBUTE;
	} else {
		return FieldType.MEASURE;
	}
}
 

private void getMetaData(RDFNode rdfNode, IFieldMetaData fieldMeta) {
	if (rdfNode.isLiteral()) {
		Literal literal = (Literal) rdfNode;
		Class classType = getClassType(literal);
		fieldMeta.setType(classType);
		FieldType type = getDefaultFieldType(literal);
		fieldMeta.setFieldType(type);
	} else if (rdfNode.isResource()) {
		fieldMeta.setType(String.class);
		fieldMeta.setFieldType(FieldType.ATTRIBUTE);
	}
}
 

public HashSet<String> getLexicalizedConcepts(String superclassURI, String annotationType, String lemma){
		Literal literal;
		if (lemma == null){
			literal = null;
		} else {
			literal = ontology.createLiteral(lemma);
		}
		StmtIterator iter = ontology.listStatements(new SimpleSelector(null, ontology.getProperty(annotationType),literal));
		
		
		HashSet<String> ontoConcepts=new HashSet<String>();
//		System.out.println(literal);
		while (iter.hasNext()) {
			
			Statement stmt = iter.nextStatement();
			Resource  subject   = stmt.getSubject();     // get the subject
			StmtIterator iter2 = ontology.listStatements(new SimpleSelector(
					subject, 
					ontology.getProperty("http://www.w3.org/2000/01/rdf-schema#subClassOf"),
//					ontology.getProperty("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
					ontology.getResource(superclassURI)));
			if (iter2.hasNext())
				ontoConcepts.add(subject.getURI());
			
//			System.out.println(subject.toString());
		}
		return ontoConcepts;
	}
 

default Optional<Literal> getMessage() {
    return getPropertyValuePairSets().getPropertyValues(SHACL.message).stream()
            .filter(RDFNode::isLiteral)
            .map(RDFNode::asLiteral)
            //.map(Literal::getLexicalForm)
            .findFirst();
}
 

/**
 *
 * @param subject
 * @param predicate
 * @param object
 * @param offset
 * @param limit
 * @return
 */
@Override
protected ILinkedDataFragment createFragment(
           final ITriplePatternElement<RDFNode,String,String> subject,
           final ITriplePatternElement<RDFNode,String,String> predicate,
           final ITriplePatternElement<RDFNode,String,String> object,
           final long offset,
           final long limit )
{
    // FIXME: The following algorithm is incorrect for cases in which
    //        the requested triple pattern contains a specific variable
    //        multiple times;
    //        e.g., (?x foaf:knows ?x ) or (_:bn foaf:knows _:bn)
    // see https://github.com/LinkedDataFragments/Server.Java/issues/24

    Model model;
    if (defaultGraph == null) {
        model = tdb.getDefaultModel();
    } else {
        model = tdb.getNamedModel(defaultGraph);
    }

    QuerySolutionMap map = new QuerySolutionMap();
    if ( ! subject.isVariable() ) {
        map.add("s", subject.asConstantTerm());
    }
    if ( ! predicate.isVariable() ) {
        map.add("p", predicate.asConstantTerm());
    }
    if ( ! object.isVariable() ) {
        map.add("o", object.asConstantTerm());
    }

    query.setOffset(offset);
    query.setLimit(limit);

    Model triples = ModelFactory.createDefaultModel();

    try (QueryExecution qexec = QueryExecutionFactory.create(query, model, map)) {
        qexec.execConstruct(triples);
    }

    if (triples.isEmpty()) {
        return createEmptyTriplePatternFragment();
    }

    // Try to get an estimate
    long size = triples.size();
    long estimate = -1;

    try (QueryExecution qexec = QueryExecutionFactory.create(countQuery, model, map)) {
        ResultSet results = qexec.execSelect();
        if (results.hasNext()) {
            QuerySolution soln = results.nextSolution() ;
            Literal literal = soln.getLiteral("count");
            estimate = literal.getLong();
        }
    }

    /*GraphStatisticsHandler stats = model.getGraph().getStatisticsHandler();
    if (stats != null) {
        Node s = (subject != null) ? subject.asNode() : null;
        Node p = (predicate != null) ? predicate.asNode() : null;
        Node o = (object != null) ? object.asNode() : null;
        estimate = stats.getStatistic(s, p, o);
    }*/

    // No estimate or incorrect
    if (estimate < offset + size) {
        estimate = (size == limit) ? offset + size + 1 : offset + size;
    }

    // create the fragment
    final boolean isLastPage = ( estimate < offset + limit );
    return createTriplePatternFragment( triples, estimate, isLastPage );
}
 

public void setLiteral(Literal literal) {
  this.literal = literal;
}