Java Code Examples for org.eclipse.rdf4j.query.algebra.evaluation.TripleSource#getStatements()

The following examples show how to use org.eclipse.rdf4j.query.algebra.evaluation.TripleSource#getStatements() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: TripleSources.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Returns the single statement with the given subject, predicate and object or null if none exists. Context
 * information is disregarded.
 *
 * @param subj null for any.
 * @param pred null for any.
 * @param obj  null for any.
 * @throws QueryEvaluationException If there is more than one such statement.
 */
public static Statement single(Resource subj, IRI pred, Value obj, TripleSource store)
		throws QueryEvaluationException {
	Statement stmt;
	try (CloseableIteration<? extends Statement, QueryEvaluationException> stmts = store.getStatements(subj, pred,
			obj)) {
		if (stmts.hasNext()) {
			stmt = stmts.next();
			while (stmts.hasNext()) {
				Statement nextStmt = stmts.next();
				if (!org.eclipse.rdf4j.model.util.Statements.isSameTriple(stmt, nextStmt)) {
					throw new QueryEvaluationException(
							"Multiple statements for pattern: " + subj + " " + pred + " " + obj);
				}
			}
		} else {
			stmt = null;
		}
	}
	return stmt;
}

Example 2

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsThreeContextsThreeContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob, this.mary);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			null, null, this.alice, this.bob, this.mary)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(24, list.size());
	}
}

Example 3

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsOneContextPredicateOwlClassNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDF.TYPE, OWL.CLASS)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(4, list.size());
	}
}

Example 4

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsPredicateOwlClassNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDF.TYPE, OWL.CLASS)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(4, list.size());
	}
}

Example 5

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsPredicateOwlClassNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDF.TYPE, OWL.CLASS)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(8, list.size());
	}
}

Example 6

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsPredicateExClassTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, f.createIRI(EX_NS, "A"), this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(6, list.size());
	}
}

Example 7

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsPredicateOwlClassTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDF.TYPE, OWL.CLASS, this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(0, list.size());
	}
}

Example 8

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsOneContextPredicateExClassOneContext() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, f.createIRI(EX_NS, "A"), this.alice)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(3, list.size());
	}
}

Example 9

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsPredicateExClassNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, f.createIRI(EX_NS, "A"))) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(3, list.size());
	}
}

Example 10

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsPredicateOwlThingTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, OWL.THING, this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(0, list.size());
	}
}

Example 11

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsOnePredicateTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, null, this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(8, list.size());
	}
}

Example 12

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsOneContextExClassPredicateTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source
			.getStatements(f.createIRI(EX_NS, "C"), RDFS.SUBCLASSOF, null, this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(1, list.size());
	}
}

Example 13

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsExClassPredicateNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source
			.getStatements(f.createIRI(EX_NS, "C"), RDFS.SUBCLASSOF, null)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(2, list.size());
	}
}

Example 14

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsOneContextPredicateExClassNoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, f.createIRI(EX_NS, "A"))) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(3, list.size());
	}
}

Example 15

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsOnePredicateOneContext() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, null, this.alice)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(0, list.size());
	}
}

Example 16

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsOnePredicate() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, null)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(8, list.size());
	}
}

Example 17

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsTwoContextsPredicateExClassOneContext() throws Exception {
	loadTestData("/alp-testdata.ttl", this.alice, this.bob);
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, f.createIRI(EX_NS, "A"), this.alice)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(3, list.size());
	}
}

Example 18

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsOnePredicate() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source.getStatements(null,
			RDFS.SUBCLASSOF, null)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(4, list.size());
	}
}

Example 19

Source File: MemTripleSourceTest.java From rdf4j with BSD 3-Clause "New" or "Revised" License

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/**
 * Test method for
 * {@link org.eclipse.rdf4j.sail.memory.MemTripleSource#getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.IRI, org.eclipse.rdf4j.model.Value, org.eclipse.rdf4j.model.Resource[])}
 * .
 */
@Test
public final void testGetStatementsNoContextsExClassPredicateTwoContexts() throws Exception {
	loadTestData("/alp-testdata.ttl");
	TripleSource source = getTripleSourceCommitted();

	try (CloseableIteration<? extends Statement, QueryEvaluationException> statements = source
			.getStatements(f.createIRI(EX_NS, "C"), RDFS.SUBCLASSOF, null, this.alice, this.bob)) {
		List<Statement> list = Iterations.asList(statements);

		assertEquals(0, list.size());
	}
}

Example 20

Source File: MemoryStoreWithHalyardStrategy.java From Halyard with Apache License 2.0

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@Override
protected NotifyingSailConnection getConnectionInternal() throws SailException {
    return new MemoryStoreConnection(this) {

        @Override
        protected EvaluationStrategy getEvaluationStrategy(Dataset dataset, final TripleSource tripleSource) {
            EvaluationStrategy es = new HalyardEvaluationStrategy(new TripleSource() {
                @Override
                public CloseableIteration<? extends Statement, QueryEvaluationException> getStatements(Resource subj, IRI pred, Value obj, Resource... contexts) throws QueryEvaluationException {
                    return new FilterIteration<Statement, QueryEvaluationException>(tripleSource.getStatements(subj, pred, obj, contexts)){
                        boolean first = true;

                        @Override
                        public boolean hasNext() throws QueryEvaluationException {
                            if (first) try {
                                first = false;
                                Thread.sleep(20);
                            } catch (InterruptedException ex) {
                                //ignore
                            }
                            return super.hasNext(); //To change body of generated methods, choose Tools | Templates.
                        }

                        @Override
                        protected boolean accept(Statement object) throws QueryEvaluationException {
                            return true;
                        }
                    };
                }

                @Override
                public ValueFactory getValueFactory() {
                    return tripleSource.getValueFactory();
                }
            }, dataset, null, new HalyardEvaluationStatistics(null, null), -1);
            es.setOptimizerPipeline(new StandardQueryOptimizerPipeline(es, tripleSource, new EvaluationStatistics()));
            return es;
        }

    };
}