Examples with SPARQLParser org.openrdf.query.parser.sparql.SPARQLParser used on opensource projects

Example 96 with SPARQLParser

use of org.openrdf.query.parser.sparql.SPARQLParser in project incubator-rya by apache.

the class AccumuloSelectivityEvalDAOTest method getSpList.

private List<StatementPattern> getSpList(String query) throws MalformedQueryException {
    SPARQLParser sp = new SPARQLParser();
    ParsedQuery pq = sp.parseQuery(query, null);
    TupleExpr te = pq.getTupleExpr();
    return StatementPatternCollector.process(te);
}

Example 97 with SPARQLParser

use of org.openrdf.query.parser.sparql.SPARQLParser in project incubator-rya by apache.

the class AccumuloBatchUpdatePCJ method updatePCJResults.

private void updatePCJResults(final String ryaInstanceName, final String pcjId) throws InstanceDoesNotExistException, PCJDoesNotExistException, RyaClientException {
    // Things that have to be closed before we exit.
    Sail sail = null;
    SailConnection sailConn = null;
    CloseableIteration<? extends BindingSet, QueryEvaluationException> results = null;
    try (final PrecomputedJoinStorage pcjStorage = new AccumuloPcjStorage(super.getConnector(), ryaInstanceName)) {
        // Create an instance of Sail backed by the Rya instance.
        sail = connectToRya(ryaInstanceName);
        // Purge the old results from the PCJ.
        try {
            pcjStorage.purge(pcjId);
        } catch (final PCJStorageException e) {
            throw new RyaClientException("Could not batch update PCJ with ID '" + pcjId + "' because the old " + "results could not be purged from it.", e);
        }
        // Parse the PCJ's SPARQL query.
        final PcjMetadata metadata = pcjStorage.getPcjMetadata(pcjId);
        final String sparql = metadata.getSparql();
        final SPARQLParser parser = new SPARQLParser();
        final ParsedQuery parsedQuery = parser.parseQuery(sparql, null);
        // Execute the query.
        sailConn = sail.getConnection();
        results = sailConn.evaluate(parsedQuery.getTupleExpr(), null, null, false);
        // Load the results into the PCJ table.
        final List<VisibilityBindingSet> batch = new ArrayList<>(1000);
        while (results.hasNext()) {
            final VisibilityBindingSet result = new VisibilityBindingSet(results.next(), "");
            batch.add(result);
            if (batch.size() == 1000) {
                pcjStorage.addResults(pcjId, batch);
                batch.clear();
            }
        }
        if (!batch.isEmpty()) {
            pcjStorage.addResults(pcjId, batch);
            batch.clear();
        }
    } catch (final MalformedQueryException | PCJStorageException | SailException | QueryEvaluationException e) {
        throw new RyaClientException("Fail to batch load new results into the PCJ with ID '" + pcjId + "'.", e);
    } finally {
        if (results != null) {
            try {
                results.close();
            } catch (final QueryEvaluationException e) {
                log.warn(e.getMessage(), e);
            }
        }
        if (sailConn != null) {
            try {
                sailConn.close();
            } catch (final SailException e) {
                log.warn(e.getMessage(), e);
            }
        }
        if (sail != null) {
            try {
                sail.shutDown();
            } catch (final SailException e) {
                log.warn(e.getMessage(), e);
            }
        }
    }
}

Example 98 with SPARQLParser

use of org.openrdf.query.parser.sparql.SPARQLParser in project incubator-rya by apache.

the class FluoQueryMetadataDAOIT method constructQueryMetadataTest.

@Test
public void constructQueryMetadataTest() throws MalformedQueryException {
    final String query = "select ?x ?y where {?x <uri:p1> ?y. ?y <uri:p2> <uri:o1> }";
    final SPARQLParser parser = new SPARQLParser();
    final ParsedQuery pq = parser.parseQuery(query, null);
    final List<StatementPattern> patterns = StatementPatternCollector.process(pq.getTupleExpr());
    final FluoQueryMetadataDAO dao = new FluoQueryMetadataDAO();
    // Create the object that will be serialized.
    final ConstructQueryMetadata.Builder builder = ConstructQueryMetadata.builder();
    builder.setNodeId("nodeId");
    builder.setChildNodeId("childNodeId");
    builder.setParentNodeId("parentNodeId");
    builder.setVarOrder(new VariableOrder("a;b;c"));
    builder.setConstructGraph(new ConstructGraph(patterns));
    final ConstructQueryMetadata originalMetadata = builder.build();
    try (FluoClient fluoClient = FluoFactory.newClient(super.getFluoConfiguration())) {
        // Write it to the Fluo table.
        try (Transaction tx = fluoClient.newTransaction()) {
            dao.write(tx, originalMetadata);
            tx.commit();
        }
        // Read it from the Fluo table.
        ConstructQueryMetadata storedMetdata = null;
        try (Snapshot sx = fluoClient.newSnapshot()) {
            storedMetdata = dao.readConstructQueryMetadata(sx, "nodeId");
        }
        // Ensure the deserialized object is the same as the serialized one.
        assertEquals(originalMetadata, storedMetdata);
    }
}

Example 99 with SPARQLParser

use of org.openrdf.query.parser.sparql.SPARQLParser in project incubator-rya by apache.

the class IndexPlanValidatorTest method testEvaluateTwoIndexTwoVarOrder6.

@Test
public void testEvaluateTwoIndexTwoVarOrder6() throws Exception {
    final String indexSparqlString = // 
    "" + // 
    "SELECT ?e ?l ?c  " + // 
    "{" + // 
    "  ?e a ?c . " + // 
    "  ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l " + // 
    "}";
    final String indexSparqlString2 = // 
    "" + // 
    "SELECT ?l ?e ?o " + // 
    "{" + // 
    "  ?e <uri:talksTo> ?o . " + // 
    "  ?o <http://www.w3.org/2000/01/rdf-schema#label> ?l " + // 
    "}";
    final String queryString = // 
    "" + // 
    "SELECT ?e ?c ?l ?o " + // 
    "{" + // 
    "  ?e a ?c . " + // 
    "  ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l . " + // 
    "  ?e <uri:talksTo> ?o . " + // 
    "  ?o <http://www.w3.org/2000/01/rdf-schema#label> ?l " + // 
    "}";
    final SPARQLParser sp = new SPARQLParser();
    final ParsedQuery index1 = sp.parseQuery(indexSparqlString, null);
    final ParsedQuery index2 = sp.parseQuery(indexSparqlString2, null);
    final List<ExternalTupleSet> index = Lists.newArrayList();
    final SimpleExternalTupleSet ais1 = new SimpleExternalTupleSet((Projection) index1.getTupleExpr());
    final SimpleExternalTupleSet ais2 = new SimpleExternalTupleSet((Projection) index2.getTupleExpr());
    index.add(ais2);
    index.add(ais1);
    final ParsedQuery pq = sp.parseQuery(queryString, null);
    final TupleExpr tup = pq.getTupleExpr().clone();
    provider.setIndices(index);
    final PCJOptimizer pcj = new PCJOptimizer(index, false, provider);
    pcj.optimize(tup, null, null);
    final IndexPlanValidator ipv = new IndexPlanValidator(false);
    Assert.assertEquals(true, ipv.isValid(tup));
}

Example 100 with SPARQLParser

use of org.openrdf.query.parser.sparql.SPARQLParser in project incubator-rya by apache.

the class IndexPlanValidatorTest method testEvaluateTwoIndexCrossProduct1.

@Test
public void testEvaluateTwoIndexCrossProduct1() throws Exception {
    final String indexSparqlString = // 
    "" + // 
    "SELECT ?e ?l ?c  " + // 
    "{" + // 
    "  ?e a ?c . " + // 
    "  ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l " + // 
    "}";
    final String indexSparqlString2 = // 
    "" + // 
    "SELECT ?e ?l ?o " + // 
    "{" + // 
    "  ?e <uri:talksTo> ?o . " + // 
    "  ?o <http://www.w3.org/2000/01/rdf-schema#label> ?l " + // 
    "}";
    final String queryString = // 
    "" + // 
    "SELECT ?e ?c ?l ?o ?f ?g " + // 
    "{" + // 
    "  ?e a ?c . " + // 
    "  ?e <http://www.w3.org/2000/01/rdf-schema#label> ?l . " + // 
    "  ?e <uri:talksTo> ?o . " + // 
    "  ?o <http://www.w3.org/2000/01/rdf-schema#label> ?l . " + // 
    "  ?f <uri:talksTo> ?g . " + // 
    "}";
    final SPARQLParser sp = new SPARQLParser();
    final ParsedQuery index1 = sp.parseQuery(indexSparqlString, null);
    final ParsedQuery index2 = sp.parseQuery(indexSparqlString2, null);
    final List<ExternalTupleSet> index = Lists.newArrayList();
    final SimpleExternalTupleSet ais1 = new SimpleExternalTupleSet((Projection) index1.getTupleExpr());
    final SimpleExternalTupleSet ais2 = new SimpleExternalTupleSet((Projection) index2.getTupleExpr());
    index.add(ais2);
    index.add(ais1);
    final ParsedQuery pq = sp.parseQuery(queryString, null);
    final TupleExpr tup = pq.getTupleExpr().clone();
    provider.setIndices(index);
    final PCJOptimizer pcj = new PCJOptimizer(index, false, provider);
    pcj.optimize(tup, null, null);
    final IndexPlanValidator ipv = new IndexPlanValidator(true);
    Assert.assertEquals(false, ipv.isValid(tup));
}