Examples with MultiProjection org.openrdf.query.algebra.MultiProjection used on opensource projects

Example 1 with MultiProjection

use of org.openrdf.query.algebra.MultiProjection in project incubator-rya by apache.

the class MultiProjectionProcessorTest method showProjectionFunctionIsCalled.

@Test
public void showProjectionFunctionIsCalled() throws Exception {
    // The SPARQL that will define the projection.
    final MultiProjection multiProjection = RdfTestUtil.getMultiProjection("CONSTRUCT {" + "_:b a <urn:movementObservation> ; " + "<urn:location> ?location ; " + "<urn:direction> ?direction ; " + "}" + "WHERE {" + "?thing <urn:corner> ?location ." + "?thing <urn:compass> ?direction." + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    final MapBindingSet inputBs = new MapBindingSet();
    inputBs.addBinding("location", vf.createURI("urn:corner1"));
    inputBs.addBinding("direction", vf.createURI("urn:NW"));
    final VisibilityBindingSet inputVisBs = new VisibilityBindingSet(inputBs, "a|b");
    // Make the expected results.
    final Set<VisibilityBindingSet> expected = new HashSet<>();
    final String blankNodeId = UUID.randomUUID().toString();
    final BNode blankNode = vf.createBNode(blankNodeId);
    MapBindingSet expectedBs = new MapBindingSet();
    expectedBs.addBinding("subject", blankNode);
    expectedBs.addBinding("predicate", RDF.TYPE);
    expectedBs.addBinding("object", vf.createURI("urn:movementObservation"));
    expected.add(new VisibilityBindingSet(expectedBs, "a|b"));
    expectedBs = new MapBindingSet();
    expectedBs.addBinding("subject", blankNode);
    expectedBs.addBinding("predicate", vf.createURI("urn:direction"));
    expectedBs.addBinding("object", vf.createURI("urn:NW"));
    expected.add(new VisibilityBindingSet(expectedBs, "a|b"));
    expectedBs = new MapBindingSet();
    expectedBs.addBinding("subject", blankNode);
    expectedBs.addBinding("predicate", vf.createURI("urn:location"));
    expectedBs.addBinding("object", vf.createURI("urn:corner1"));
    expected.add(new VisibilityBindingSet(expectedBs, "a|b"));
    // Mock the processor context that will be invoked.
    final ProcessorContext context = mock(ProcessorContext.class);
    // Run the test.
    final MultiProjectionProcessor processor = new MultiProjectionProcessor(MultiProjectionEvaluator.make(multiProjection, () -> blankNodeId), result -> ProcessorResult.make(new UnaryResult(result)));
    processor.init(context);
    processor.process("key", ProcessorResult.make(new UnaryResult(inputVisBs)));
    final ArgumentCaptor<ProcessorResult> results = ArgumentCaptor.forClass(ProcessorResult.class);
    verify(context, times(3)).forward(any(), results.capture());
    final Set<VisibilityBindingSet> resultBindingSets = results.getAllValues().stream().map(result -> {
        return (result.getType() == ResultType.UNARY) ? result.getUnary().getResult() : result.getBinary().getResult();
    }).collect(Collectors.toSet());
    assertEquals(expected, resultBindingSets);
}

Example 2 with MultiProjection

use of org.openrdf.query.algebra.MultiProjection in project incubator-rya by apache.

the class MultiProjectionEvaluatorTest method getMultiProjection.

/**
 * Get the first {@link MultiProjection} node from a SPARQL query.
 *
 * @param sparql - The query that contains a single Projection node.
 * @return The first {@link MultiProjection} that is encountered.
 * @throws Exception The query could not be parsed.
 */
@Nullable
public static MultiProjection getMultiProjection(final String sparql) throws Exception {
    requireNonNull(sparql);
    final AtomicReference<MultiProjection> multiProjection = new AtomicReference<>();
    final ParsedQuery parsed = new SPARQLParser().parseQuery(sparql, null);
    parsed.getTupleExpr().visit(new QueryModelVisitorBase<Exception>() {

        @Override
        public void meet(final MultiProjection node) throws Exception {
            multiProjection.set(node);
        }
    });
    return multiProjection.get();
}

Example 3 with MultiProjection

use of org.openrdf.query.algebra.MultiProjection in project incubator-rya by apache.

the class RdfTestUtil method getMultiProjection.

/**
 * Get the first {@link MultiProjection} node from a SPARQL query.
 *
 * @param sparql - The query that contains a single Projection node.
 * @return The first {@link MultiProjection} that is encountered.
 * @throws Exception The query could not be parsed.
 */
@Nullable
public static MultiProjection getMultiProjection(final String sparql) throws Exception {
    requireNonNull(sparql);
    final AtomicReference<MultiProjection> multiProjection = new AtomicReference<>();
    final ParsedQuery parsed = new SPARQLParser().parseQuery(sparql, null);
    parsed.getTupleExpr().visit(new QueryModelVisitorBase<Exception>() {

        @Override
        public void meet(final MultiProjection node) throws Exception {
            multiProjection.set(node);
        }
    });
    return multiProjection.get();
}

Example 4 with MultiProjection

use of org.openrdf.query.algebra.MultiProjection in project incubator-rya by apache.

the class MultiProjectionEvaluatorTest method singleBlankNode.

@Test
public void singleBlankNode() throws Exception {
    // Read the multi projection object from a SPARQL query.
    final MultiProjection multiProjection = getMultiProjection("CONSTRUCT {" + "_:b a <urn:movementObservation> ; " + "<urn:location> ?location ; " + "<urn:direction> ?direction ; " + "}" + "WHERE {" + "?thing <urn:corner> ?location ." + "?thing <urn:compass> ?direction." + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    MapBindingSet bs = new MapBindingSet();
    bs.addBinding("location", vf.createLiteral("South St and 5th St"));
    bs.addBinding("direction", vf.createLiteral("NW"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // Create the expected results.
    final Set<VisibilityBindingSet> expected = new HashSet<>();
    final String blankNodeId = UUID.randomUUID().toString();
    final BNode blankNode = vf.createBNode(blankNodeId);
    bs = new MapBindingSet();
    bs.addBinding("subject", blankNode);
    bs.addBinding("predicate", RDF.TYPE);
    bs.addBinding("object", vf.createURI("urn:movementObservation"));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    bs = new MapBindingSet();
    bs.addBinding("subject", blankNode);
    bs.addBinding("predicate", vf.createURI("urn:location"));
    bs.addBinding("object", vf.createLiteral("South St and 5th St"));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    bs = new MapBindingSet();
    bs.addBinding("subject", blankNode);
    bs.addBinding("predicate", vf.createURI("urn:direction"));
    bs.addBinding("object", vf.createLiteral("NW"));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    // Run the projection evaluator.
    final Set<VisibilityBindingSet> results = MultiProjectionEvaluator.make(multiProjection, () -> blankNodeId).project(original);
    // The expected binding sets.
    assertEquals(expected, results);
}

Example 5 with MultiProjection

use of org.openrdf.query.algebra.MultiProjection in project incubator-rya by apache.

the class MultiProjectionEvaluatorTest method multipleBlanknodes.

@Test
public void multipleBlanknodes() throws Exception {
    // Read the multi projection object from a SPARQL query.
    final MultiProjection multiProjection = getMultiProjection("CONSTRUCT {" + "_:b a <urn:vehicle> . " + "_:b <urn:tiresCount> 4 ." + "_:c a <urn:pet> . " + "_:c <urn:isDead> false . " + "}" + "WHERE {" + "?vehicle <urn:owner> ?owner . " + "?vehicle <urn:plates> ?plates . " + "?pet <urn:owner> ?owner . " + "?pet <urn:isLiving> true . " + "}");
    // Create a Binding Set that contains the result of the WHERE clause.
    final ValueFactory vf = new ValueFactoryImpl();
    MapBindingSet bs = new MapBindingSet();
    bs.addBinding("vehicle", vf.createLiteral("Alice's car"));
    bs.addBinding("owner", vf.createURI("urn:Alice"));
    bs.addBinding("plates", vf.createLiteral("XXXXXXX"));
    bs.addBinding("pet", vf.createURI("urn:Kitty"));
    final VisibilityBindingSet original = new VisibilityBindingSet(bs, "a|b");
    // Run the projection evaluator.
    final Set<VisibilityBindingSet> results = MultiProjectionEvaluator.make(multiProjection, new RandomUUIDFactory()).project(original);
    // Figure out the blank nodes.
    Value vehicalBNode = null;
    Value petBNode = null;
    for (final VisibilityBindingSet result : results) {
        final Value object = result.getValue("object");
        if (object.equals(vf.createURI("urn:vehicle"))) {
            vehicalBNode = result.getValue("subject");
        } else if (object.equals(vf.createURI("urn:pet"))) {
            petBNode = result.getValue("subject");
        }
    }
    // The expected binding sets.
    final Set<VisibilityBindingSet> expected = new HashSet<>();
    bs = new MapBindingSet();
    bs.addBinding("subject", vehicalBNode);
    bs.addBinding("predicate", RDF.TYPE);
    bs.addBinding("object", vf.createURI("urn:vehicle"));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    bs = new MapBindingSet();
    bs.addBinding("subject", vehicalBNode);
    bs.addBinding("predicate", vf.createURI("urn:tiresCount"));
    bs.addBinding("object", vf.createLiteral("4", XMLSchema.INTEGER));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    bs = new MapBindingSet();
    bs.addBinding("subject", petBNode);
    bs.addBinding("predicate", RDF.TYPE);
    bs.addBinding("object", vf.createURI("urn:pet"));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    bs = new MapBindingSet();
    bs.addBinding("subject", petBNode);
    bs.addBinding("predicate", vf.createURI("urn:isDead"));
    bs.addBinding("object", vf.createLiteral(false));
    expected.add(new VisibilityBindingSet(bs, "a|b"));
    assertEquals(expected, results);
}