Examples with Statement org.apache.jena.rdf.model.Statement used on opensource projects

Example 21 with Statement

use of org.apache.jena.rdf.model.Statement in project jena by apache.

the class ExTDB6 method main.

public static void main(String[] args) throws Exception {
    /// turn off the "No BGP optimizer warning"
    TDB.setOptimizerWarningFlag(false);
    final IRIFactory iriFactory = IRIFactory.semanticWebImplementation();
    final String DATASET_DIR_NAME = "data0";
    final Dataset data0 = TDBFactory.createDataset(DATASET_DIR_NAME);
    // show the currently registered names
    for (Iterator<String> it = data0.listNames(); it.hasNext(); ) {
        out.println("NAME=" + it.next());
    }
    out.println("getting named model...");
    /// this is the OWL portion
    final Model model = data0.getNamedModel(MY_NS);
    out.println("Model := " + model);
    out.println("getting graph...");
    /// this is the DATA in that MODEL
    final Graph graph = model.getGraph();
    out.println("Graph := " + graph);
    if (graph.isEmpty()) {
        final Resource product1 = model.createResource(iriFactory.construct(MY_NS + "product/1").toString());
        final Property hasName = model.createProperty(MY_NS, "#hasName");
        final Statement stmt = model.createStatement(product1, hasName, model.createLiteral("Beach Ball", "en"));
        out.println("Statement = " + stmt);
        model.add(stmt);
        // just for fun
        out.println("Triple := " + stmt.asTriple().toString());
    } else {
        out.println("Graph is not Empty; it has " + graph.size() + " Statements");
        long t0, t1;
        t0 = System.currentTimeMillis();
        final Query q = QueryFactory.create("PREFIX exns: <" + MY_NS + "#>\n" + "PREFIX exprod: <" + MY_NS + "product/>\n" + " SELECT * " + // +" WHERE { exprod:1 exns:hasName ?name }"
        " WHERE { ?res ?pred ?obj }");
        out.println("Query := " + q);
        t1 = System.currentTimeMillis();
        out.println("QueryFactory.TIME=" + (t1 - t0));
        t0 = System.currentTimeMillis();
        final QueryExecution qExec = QueryExecutionFactory.create(q, model);
        t1 = System.currentTimeMillis();
        out.println("QueryExecutionFactory.TIME=" + (t1 - t0));
        try {
            t0 = System.currentTimeMillis();
            ResultSet rs = qExec.execSelect();
            t1 = System.currentTimeMillis();
            out.println("executeSelect.TIME=" + (t1 - t0));
            while (rs.hasNext()) {
                QuerySolution sol = rs.next();
                out.println("Solution := " + sol);
                for (Iterator<String> names = sol.varNames(); names.hasNext(); ) {
                    final String name = names.next();
                    out.println("\t" + name + " := " + sol.get(name));
                }
            }
        } finally {
            qExec.close();
        }
    }
    out.println("closing graph");
    graph.close();
    out.println("closing model");
    model.close();
    //out.println("closing DataSetGraph");
    //dsg.close();
    out.println("closing DataSet");
    data0.close();
}

Example 22 with Statement

use of org.apache.jena.rdf.model.Statement in project jena by apache.

the class TestConcurrentAccess method mrswGraph1.

@Test
public void mrswGraph1() {
    Model m = create().getDefaultModel();
    Resource r = m.createResource("x");
    ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode) null);
    assertNotNull(iter1.next());
    ExtendedIterator<Statement> iter2 = m.listStatements(r, null, (RDFNode) null);
    assertNotNull(iter2.next());
    for (; iter2.hasNext(); ) iter2.next();
    assertNotNull(iter1.next());
}

Example 23 with Statement

use of org.apache.jena.rdf.model.Statement in project jena by apache.

the class TestConcurrentAccess method mrswGraph3.

@Test(expected = ConcurrentModificationException.class)
public void mrswGraph3() {
    Model m = create().getDefaultModel();
    Resource r = m.createResource("x");
    ExtendedIterator<Statement> iter1 = m.listStatements(r, null, (RDFNode) null);
    assertNotNull(iter1.next());
    Triple t = SSE.parseTriple("(<y> <p> 99)");
    m.getGraph().delete(t);
    // Bad
    iter1.hasNext();
}

Example 24 with Statement

use of org.apache.jena.rdf.model.Statement in project jena by apache.

the class StandardAnalyzerAssembler method toList.

private List<String> toList(Resource list) {
    List<String> result = new ArrayList<>();
    Resource current = list;
    while (current != null && !current.equals(RDF.nil)) {
        Statement stmt = current.getProperty(RDF.first);
        if (stmt == null) {
            throw new TextIndexException("stop word list not well formed");
        }
        RDFNode node = stmt.getObject();
        if (!node.isLiteral()) {
            throw new TextIndexException("stop word is not a literal : " + node);
        }
        result.add(((Literal) node).getLexicalForm());
        stmt = current.getProperty(RDF.rest);
        if (stmt == null) {
            throw new TextIndexException("stop word list not terminated by rdf:nil");
        }
        node = stmt.getObject();
        if (!node.isResource()) {
            throw new TextIndexException("stop word list node is not a resource : " + node);
        }
        current = (Resource) node;
    }
    return result;
}

Example 25 with Statement

use of org.apache.jena.rdf.model.Statement in project jena by apache.

the class TestInMemDatasetAssembler method directDataLinkToQuads.

@Test
public void directDataLinkToQuads() throws IOException {
    // first make a file of quads to load later
    final Model model = createDefaultModel();
    final Path quads = createTempFile("quadExample", ".nq");
    final Resource quadsURI = model.createResource(quads.toFile().toURI().toString());
    final Resource simpleExample = model.createResource("test:simpleExample");
    simpleExample.addProperty(type, DatasetAssemblerVocab.tDatasetTxnMem);
    simpleExample.addProperty(data, quadsURI);
    final DatasetGraph dsg = createTxnMem().asDatasetGraph();
    model.listStatements().mapWith(Statement::asTriple).mapWith(t -> new Quad(quadsURI.asNode(), t)).forEachRemaining(dsg::add);
    try (OutputStream out = new FileOutputStream(quads.toFile())) {
        write(out, dsg, NQUADS);
    }
    final Dataset dataset = assemble(simpleExample);
    final Model assembledDefaultModel = dataset.getDefaultModel();
    final Model assembledNamedModel = dataset.getNamedModel(quadsURI.getURI());
    assertTrue(assembledDefaultModel.isEmpty());
    assertTrue(assembledNamedModel.contains(assembledNamedModel.createStatement(simpleExample, data, quadsURI)));
}