Examples with BNode org.eclipse.rdf4j.model.BNode used on opensource projects

Example 11 with BNode

use of org.eclipse.rdf4j.model.BNode in project rdf4j by eclipse.

the class AbstractRDFInserter method handleStatement.

@Override
public void handleStatement(Statement st) throws RDFHandlerException {
    Resource subj = st.getSubject();
    IRI pred = st.getPredicate();
    Value obj = st.getObject();
    Resource ctxt = st.getContext();
    if (!preserveBNodeIDs) {
        if (subj instanceof BNode) {
            subj = mapBNode((BNode) subj);
        }
        if (obj instanceof BNode) {
            obj = mapBNode((BNode) obj);
        }
        if (!enforcesContext() && ctxt instanceof BNode) {
            ctxt = mapBNode((BNode) ctxt);
        }
    }
    try {
        addStatement(subj, pred, obj, ctxt);
    } catch (RDF4JException e) {
        throw new RDFHandlerException(e);
    }
}

Example 12 with BNode

use of org.eclipse.rdf4j.model.BNode in project rdf4j by eclipse.

the class RepositoryUtil method statementsMatch.

private static boolean statementsMatch(Statement st1, Statement st2, Map<BNode, BNode> bNodeMapping) {
    IRI pred1 = st1.getPredicate();
    IRI pred2 = st2.getPredicate();
    if (!pred1.equals(pred2)) {
        // predicates don't match
        return false;
    }
    Resource subj1 = st1.getSubject();
    Resource subj2 = st2.getSubject();
    if (!(subj1 instanceof BNode)) {
        if (!subj1.equals(subj2)) {
            // subjects are not bNodes and don't match
            return false;
        }
    } else {
        // subj1 instanceof BNode
        BNode mappedBNode = bNodeMapping.get(subj1);
        if (mappedBNode != null) {
            // bNode 'subj1' was already mapped to some other bNode
            if (!subj2.equals(mappedBNode)) {
                // 'subj1' and 'subj2' do not match
                return false;
            }
        } else {
            // possible mapping candidate
            if (bNodeMapping.containsValue(subj2)) {
                // 'subj2' is already mapped to some other value.
                return false;
            }
        }
    }
    Value obj1 = st1.getObject();
    Value obj2 = st2.getObject();
    if (!(obj1 instanceof BNode)) {
        if (!obj1.equals(obj2)) {
            // objects are not bNodes and don't match
            return false;
        }
    } else {
        // obj1 instanceof BNode
        BNode mappedBNode = bNodeMapping.get(obj1);
        if (mappedBNode != null) {
            // bNode 'obj1' was already mapped to some other bNode
            if (!obj2.equals(mappedBNode)) {
                // 'obj1' and 'obj2' do not match
                return false;
            }
        } else {
            // possible mapping candidate
            if (bNodeMapping.containsValue(obj2)) {
                // 'obj2' is already mapped to some other value.
                return false;
            }
        }
    }
    return true;
}

Example 13 with BNode

use of org.eclipse.rdf4j.model.BNode in project rdf4j by eclipse.

the class AbstractRDFInserter method mapBNode.

/**
 * Maps the supplied BNode, which comes from the data, to a new BNode object. Consecutive calls with equal
 * BNode objects returns the same object everytime.
 *
 * @throws RepositoryException
 */
private BNode mapBNode(BNode bNode) {
    BNode result = bNodesMap.get(bNode.getID());
    if (result == null) {
        result = valueFactory.createBNode();
        bNodesMap.put(bNode.getID(), result);
    }
    return result;
}

Example 14 with BNode

use of org.eclipse.rdf4j.model.BNode in project rdf4j by eclipse.

the class AbstractSPARQLJSONWriter method writeValue.

protected void writeValue(Value value) throws IOException, QueryResultHandlerException {
    jg.writeStartObject();
    if (value instanceof IRI) {
        jg.writeStringField("type", "uri");
        jg.writeStringField("value", ((IRI) value).toString());
    } else if (value instanceof BNode) {
        jg.writeStringField("type", "bnode");
        jg.writeStringField("value", ((BNode) value).getID());
    } else if (value instanceof Literal) {
        Literal lit = (Literal) value;
        if (Literals.isLanguageLiteral(lit)) {
            jg.writeObjectField("xml:lang", lit.getLanguage().orElse(null));
        } else {
            IRI datatype = lit.getDatatype();
            boolean ignoreDatatype = datatype.equals(XMLSchema.STRING) && xsdStringToPlainLiteral();
            if (!ignoreDatatype) {
                jg.writeObjectField("datatype", lit.getDatatype().stringValue());
            }
        }
        jg.writeObjectField("type", "literal");
        jg.writeObjectField("value", lit.getLabel());
    } else {
        throw new TupleQueryResultHandlerException("Unknown Value object type: " + value.getClass());
    }
    jg.writeEndObject();
}

Example 15 with BNode

use of org.eclipse.rdf4j.model.BNode in project rdf4j by eclipse.

the class TriGParserCustomTest method testGraphLocalNameGraph.

@Test
public void testGraphLocalNameGraph() throws Exception {
    Model model = Rio.parse(new StringReader("@prefix graph: <urn:> .\n graph:a { [] <http://www.example.net/test> \"Foo\" }"), "", RDFFormat.TRIG);
    assertEquals(1, model.size());
    assertNotNull(model.contexts().iterator().next());
    assertEquals("urn:a", model.contexts().iterator().next().stringValue());
    assertTrue(model.subjects().iterator().next() instanceof BNode);
    assertEquals("http://www.example.net/test", model.predicates().iterator().next().stringValue());
    assertEquals("Foo", model.objects().iterator().next().stringValue());
}