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

Example 26 with BNode

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

the class TriGParserCustomTest method testGraph.

@Test
public void testGraph() throws Exception {
    Model model = Rio.parse(new StringReader("<urn: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());
}

Example 27 with BNode

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

the class TransactionWriter method serialize.

protected void serialize(SPARQLUpdateOperation op, XMLWriter xmlWriter) throws IOException {
    String baseURI = op.getBaseURI();
    if (baseURI != null) {
        xmlWriter.setAttribute(TransactionXMLConstants.BASE_URI_ATT, baseURI);
    }
    xmlWriter.setAttribute(TransactionXMLConstants.INCLUDE_INFERRED_ATT, op.isIncludeInferred());
    xmlWriter.startTag(TransactionXMLConstants.SPARQL_UPDATE_TAG);
    // serialize update string
    String updateString = op.getUpdateString();
    xmlWriter.textElement(TransactionXMLConstants.UPDATE_STRING_TAG, updateString);
    // serialize dataset definition (if any)
    Dataset dataset = op.getDataset();
    if (dataset != null) {
        xmlWriter.startTag(TransactionXMLConstants.DATASET_TAG);
        xmlWriter.startTag(TransactionXMLConstants.DEFAULT_GRAPHS_TAG);
        for (IRI defaultGraph : dataset.getDefaultGraphs()) {
            xmlWriter.textElement(TransactionXMLConstants.GRAPH_TAG, defaultGraph.stringValue());
        }
        xmlWriter.endTag(TransactionXMLConstants.DEFAULT_GRAPHS_TAG);
        xmlWriter.startTag(TransactionXMLConstants.NAMED_GRAPHS_TAG);
        for (IRI namedGraph : dataset.getNamedGraphs()) {
            xmlWriter.textElement(TransactionXMLConstants.GRAPH_TAG, namedGraph.stringValue());
        }
        xmlWriter.endTag(TransactionXMLConstants.NAMED_GRAPHS_TAG);
        xmlWriter.startTag(TransactionXMLConstants.DEFAULT_REMOVE_GRAPHS_TAG);
        for (IRI defaultRemoveGraph : dataset.getDefaultRemoveGraphs()) {
            xmlWriter.textElement(TransactionXMLConstants.GRAPH_TAG, defaultRemoveGraph.stringValue());
        }
        xmlWriter.endTag(TransactionXMLConstants.DEFAULT_REMOVE_GRAPHS_TAG);
        if (dataset.getDefaultInsertGraph() != null) {
            xmlWriter.textElement(TransactionXMLConstants.DEFAULT_INSERT_GRAPH, dataset.getDefaultInsertGraph().stringValue());
        }
        xmlWriter.endTag(TransactionXMLConstants.DATASET_TAG);
    }
    if (op.getBindings() != null && op.getBindings().length > 0) {
        xmlWriter.startTag(TransactionXMLConstants.BINDINGS);
        for (Binding binding : op.getBindings()) {
            if (binding.getName() != null && binding.getValue() != null && binding.getValue().stringValue() != null) {
                if (binding.getValue() instanceof IRI) {
                    xmlWriter.setAttribute(TransactionXMLConstants.NAME_ATT, binding.getName());
                    xmlWriter.textElement(TransactionXMLConstants.BINDING_URI, binding.getValue().stringValue());
                }
                if (binding.getValue() instanceof BNode) {
                    xmlWriter.setAttribute(TransactionXMLConstants.NAME_ATT, binding.getName());
                    xmlWriter.textElement(TransactionXMLConstants.BINDING_BNODE, binding.getValue().stringValue());
                }
                if (binding.getValue() instanceof Literal) {
                    xmlWriter.setAttribute(TransactionXMLConstants.NAME_ATT, binding.getName());
                    Literal literal = (Literal) binding.getValue();
                    if (Literals.isLanguageLiteral(literal)) {
                        xmlWriter.setAttribute(TransactionXMLConstants.LANGUAGE_ATT, literal.getLanguage().get());
                    } else {
                        xmlWriter.setAttribute(TransactionXMLConstants.DATA_TYPE_ATT, literal.getDatatype().stringValue());
                    }
                    xmlWriter.textElement(TransactionXMLConstants.BINDING_LITERAL, binding.getValue().stringValue());
                }
            }
        }
        xmlWriter.endTag(TransactionXMLConstants.BINDINGS);
    }
    xmlWriter.endTag(TransactionXMLConstants.SPARQL_UPDATE_TAG);
}

Example 28 with BNode

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

the class SPARQLConnection method createDataBody.

private void createDataBody(StringBuilder qb, Iterable<? extends Statement> statements, boolean ignoreContext) {
    for (Statement st : statements) {
        final Resource context = st.getContext();
        if (!ignoreContext) {
            if (context != null) {
                String namedGraph = context.stringValue();
                if (context instanceof BNode) {
                    // SPARQL does not allow blank nodes as named graph
                    // identifiers, so we need to skolemize
                    // the blank node id.
                    namedGraph = "urn:nodeid:" + context.stringValue();
                }
                qb.append("    GRAPH <" + namedGraph + "> { \n");
            }
        }
        if (st.getSubject() instanceof BNode) {
            qb.append("_:" + st.getSubject().stringValue() + " ");
        } else {
            qb.append("<" + st.getSubject().stringValue() + "> ");
        }
        qb.append("<" + st.getPredicate().stringValue() + "> ");
        if (st.getObject() instanceof Literal) {
            Literal lit = (Literal) st.getObject();
            qb.append("\"");
            qb.append(SPARQLUtil.encodeString(lit.getLabel()));
            qb.append("\"");
            if (Literals.isLanguageLiteral(lit)) {
                qb.append("@");
                qb.append(lit.getLanguage().get());
            } else {
                qb.append("^^<" + lit.getDatatype().stringValue() + ">");
            }
            qb.append(" ");
        } else if (st.getObject() instanceof BNode) {
            qb.append("_:" + st.getObject().stringValue() + " ");
        } else {
            qb.append("<" + st.getObject().stringValue() + "> ");
        }
        qb.append(". \n");
        if (!ignoreContext && context != null) {
            qb.append("    }\n");
        }
    }
}

Example 29 with BNode

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

the class SPARQLConnection method createDeletePatternCommand.

private String createDeletePatternCommand(Resource subject, IRI predicate, Value object, Resource[] contexts) {
    StringBuilder qb = new StringBuilder();
    qb.append("DELETE WHERE \n");
    qb.append("{ \n");
    if (contexts.length > 0) {
        for (Resource context : contexts) {
            if (context != null) {
                String namedGraph = context.stringValue();
                if (context instanceof BNode) {
                    // SPARQL does not allow blank nodes as named graph
                    // identifiers, so we need to skolemize
                    // the blank node id.
                    namedGraph = "urn:nodeid:" + context.stringValue();
                }
                qb.append("    GRAPH <" + namedGraph + "> { \n");
            }
            createBGP(qb, subject, predicate, object);
            if (context != null && context instanceof IRI) {
                qb.append(" } \n");
            }
        }
    } else {
        createBGP(qb, subject, predicate, object);
    }
    qb.append("}");
    return qb.toString();
}

Example 30 with BNode

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

the class TupleExprs method getConstVarName.

public static String getConstVarName(Value value) {
    if (value == null) {
        throw new IllegalArgumentException("value can not be null");
    }
    // We use toHexString to get a more compact stringrep.
    String uniqueStringForValue = Integer.toHexString(value.stringValue().hashCode());
    if (value instanceof Literal) {
        uniqueStringForValue += "_lit";
        // we need to append datatype and/or language tag to ensure a unique
        // var name (see SES-1927)
        Literal lit = (Literal) value;
        if (lit.getDatatype() != null) {
            uniqueStringForValue += "_" + Integer.toHexString(lit.getDatatype().hashCode());
        }
        if (lit.getLanguage() != null) {
            uniqueStringForValue += "_" + Integer.toHexString(lit.getLanguage().hashCode());
        }
    } else if (value instanceof BNode) {
        uniqueStringForValue += "_node";
    } else {
        uniqueStringForValue += "_uri";
    }
    return "_const_" + uniqueStringForValue;
}