Examples with DatasetGraph org.apache.jena.sparql.core.DatasetGraph used on opensource projects

Example 51 with DatasetGraph

use of org.apache.jena.sparql.core.DatasetGraph in project jena by apache.

the class BuilderGraph method buildDataset.

public static DatasetGraph buildDataset(DatasetGraph dsg, ItemList list) {
    BuilderLib.checkTag(list, Tags.tagDataset);
    list = list.cdr();
    for (Item item : list) {
        if (!item.isTagged(Tags.tagGraph)) {
            // Not (graph ...) so it's (quad), short form quad or an error.
            Quad q = BuilderGraph.buildQuad(item.getList(), "Expected (graph ...) or a quad () as elements of a dataset");
            dsg.add(q);
            continue;
        }
        Node name = null;
        ItemList graphContent = item.getList().cdr();
        if (!graphContent.isEmpty() && graphContent.car().isNode()) {
            name = graphContent.car().getNode();
            graphContent = graphContent.cdr();
        }
        Graph g;
        if (name == null) {
            g = dsg.getDefaultGraph();
            if (g == null) {
                g = GraphFactory.createDefaultGraph();
                dsg.setDefaultGraph(g);
            }
        } else {
            g = dsg.getGraph(name);
            if (g == null) {
                g = GraphFactory.createDefaultGraph();
                dsg.addGraph(name, g);
            }
        }
        BuilderGraph.buildGraph(g, graphContent);
    }
    return dsg;
}

Example 52 with DatasetGraph

use of org.apache.jena.sparql.core.DatasetGraph in project jena by apache.

the class WriterGraph method writeDataset.

// ---- Workers
private static void writeDataset(IndentedWriter out, DatasetGraph ds, SerializationContext naming) {
    WriterLib.start(out, Tags.tagDataset, NL);
    writeGraph(out, ds.getDefaultGraph(), naming);
    out.ensureStartOfLine();
    for (Iterator<Node> iter = ds.listGraphNodes(); iter.hasNext(); ) {
        Node node = iter.next();
        out.ensureStartOfLine();
        Graph g = ds.getGraph(node);
        writeGraph(out, g, node, naming);
    }
    WriterLib.finish(out, Tags.tagDataset);
    out.ensureStartOfLine();
}

Example 53 with DatasetGraph

use of org.apache.jena.sparql.core.DatasetGraph in project jena by apache.

the class TestDatasetGraphInMemoryBasic method orderingOfNodesFromFindIsCorrect.

@Test
public void orderingOfNodesFromFindIsCorrect() {
    final DatasetGraph dsg = DatasetGraphFactory.createTxnMem();
    final Node p = parseNode(":p");
    final Triple triple = parseTriple("(:s :p :o)");
    dsg.getDefaultGraph().add(triple);
    final Iterator<Triple> iter = dsg.getDefaultGraph().find(null, p, null);
    assertTrue(some(iter, triple::equals));
    final Node p1 = parseNode(":p1");
    final Quad quad = parseQuad("(:g1 :s1 :p1 :o1)");
    dsg.add(quad);
    final Iterator<Quad> iter2 = dsg.find(null, null, p1, null);
    assertTrue(some(iter2, quad::equals));
    Iter.print(err, iter2);
}

Example 54 with DatasetGraph

use of org.apache.jena.sparql.core.DatasetGraph in project jena by apache.

the class TestDatasetGraphInMemoryBasic method prefixesAreManaged.

@Test
public void prefixesAreManaged() {
    final Node graphName = createURI("http://example/g");
    final DatasetGraph dsg = emptyDataset();
    dsg.addGraph(graphName, createGraphMem());
    final Dataset dataset = DatasetFactory.wrap(dsg);
    Model model = dataset.getNamedModel(graphName.getURI());
    final String testPrefix = "example";
    final String testURI = "http://example/";
    model.setNsPrefix(testPrefix, testURI);
    assertEquals(testURI, model.getNsPrefixURI(testPrefix));
    model.close();
    model = dataset.getNamedModel(graphName.getURI());
    final String nsURI = dataset.getNamedModel(graphName.getURI()).getNsPrefixURI(testPrefix);
    assertNotNull(nsURI);
    assertEquals(testURI, nsURI);
}

Example 55 with DatasetGraph

use of org.apache.jena.sparql.core.DatasetGraph in project jena by apache.

the class AbstractDatasetGraphTests method quad_04.

@Test
public void quad_04() {
    DatasetGraph dsg = emptyDataset();
    assertNotNull(dsg);
    Quad quad1 = SSE.parseQuad("(quad <g> <s> <p> <o1>)");
    Quad quad2 = SSE.parseQuad("(quad <g> <s> <p> <o2>)");
    dsg.add(quad1);
    dsg.add(quad2);
    Iterator<Quad> iter = dsg.find(NodeFactory.createURI("g"), NodeFactory.createURI("s"), null, null);
    assertTrue(iter.hasNext());
    Set<Quad> x = Iter.iter(iter).toSet();
    assertEquals(2, x.size());
    assertTrue(x.contains(quad1));
    assertTrue(x.contains(quad2));
}