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

Example 56 with Statement

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

the class RepositoryUtil method equals.

/**
 * Compares the models in the default contexts of the two supplied repositories and returns true if they
 * are equal. Models are equal if they contain the same set of statements. bNodes IDs are not relevant for
 * model equality, they are mapped from one model to the other by using the attached properties. Note that
 * the method pulls the entire default context of both repositories into main memory. Use with caution.
 */
public static boolean equals(Repository rep1, Repository rep2) throws RepositoryException {
    // Fetch statements from rep1 and rep2
    Set<Statement> model1, model2;
    RepositoryConnection con1 = rep1.getConnection();
    try {
        model1 = Iterations.asSet(con1.getStatements(null, null, null, true));
    } finally {
        con1.close();
    }
    RepositoryConnection con2 = rep2.getConnection();
    try {
        model2 = Iterations.asSet(con2.getStatements(null, null, null, true));
    } finally {
        con2.close();
    }
    return Models.isomorphic(model1, model2);
}

Example 57 with Statement

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

the class Connections method consumeRDFCollection.

/**
 * Retrieve all {@link Statement}s that together form the RDF Collection starting with the supplied start
 * resource and send them to the supplied {@link Consumer}.
 *
 * @param conn
 *        the {@link RepositoryConnection} to use for statement retrieval.
 * @param head
 *        the start resource of the RDF Collection. May not be {@code null}.
 * @param collectionConsumer
 *        a {@link Consumer} function to which all retrieved statements will be reported. May not be
 *        {@code null}.
 * @param contexts
 *        the context(s) from which to read the RDF Collection. This argument is an optional vararg and
 *        can be left out.
 * @throws RepositoryException
 *         if an error occurred while reading the collection statements, for example if a cycle is
 *         detected in the RDF collection, or some other anomaly which makes it non-wellformed.
 * @see RDFCollections
 * @see <a href="http://www.w3.org/TR/rdf-schema/#ch_collectionvocab">RDF Schema 1.1 section on Collection
 *      vocabulary</a>.
 */
public static void consumeRDFCollection(RepositoryConnection conn, Resource head, Consumer<Statement> collectionConsumer, Resource... contexts) throws RepositoryException {
    GetStatementOptional statementSupplier = (s, p, o, c) -> getStatement(conn, s, p, o, c);
    Function<String, Supplier<RepositoryException>> exceptionSupplier = Repositories::repositoryException;
    RDFCollections.extract(statementSupplier, head, collectionConsumer, exceptionSupplier, contexts);
}

Example 58 with Statement

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

the class AbstractRepositoryConnection method add.

@Override
public void add(Iterable<? extends Statement> statements, Resource... contexts) throws RepositoryException {
    OpenRDFUtil.verifyContextNotNull(contexts);
    boolean localTransaction = startLocalTransaction();
    try {
        for (Statement st : statements) {
            addWithoutCommit(st, contexts);
        }
        conditionalCommit(localTransaction);
    } catch (RepositoryException e) {
        conditionalRollback(localTransaction);
        throw e;
    } catch (RuntimeException e) {
        conditionalRollback(localTransaction);
        throw e;
    }
}

Example 59 with Statement

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

the class ContextStatementTest method test.

@Test
public void test() {
    Statement st1 = vf.createStatement(s1, p1, o1);
    Statement st2 = vf.createStatement(s1, p1, o1, g1);
    Statement st3 = vf.createStatement(s1, p1, o2);
    Statement st4 = vf.createStatement(s1, p1, o1, g1);
    Statement st5 = vf.createStatement(s1, p1, o1, g2);
    assertNotEquals(st1, st2);
    assertNotEquals(st1, st3);
    assertEquals(st2, st4);
    assertNotEquals(st2, st5);
    Set<Statement> set = new HashSet<Statement>();
    set.add(st1);
    set.add(st2);
    set.add(st3);
    set.add(st4);
    set.add(st5);
    assertEquals(4, set.size());
}

Example 60 with Statement

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

the class DAWGTestResultSetUtil method toTupleQueryResult.

public static TupleQueryResult toTupleQueryResult(Iterable<? extends Statement> dawgGraph) throws DAWGTestResultSetParseException {
    TupleQueryResultBuilder tqrBuilder = new TupleQueryResultBuilder();
    DAWGTestResultSetParser parser = new DAWGTestResultSetParser(tqrBuilder);
    try {
        parser.startRDF();
        for (Statement st : dawgGraph) {
            parser.handleStatement(st);
        }
        parser.endRDF();
        return tqrBuilder.getQueryResult();
    } catch (RDFHandlerException e) {
        throw new DAWGTestResultSetParseException(e.getMessage(), e);
    }
}