Examples with StatementPatternNode com.bigdata.rdf.sparql.ast.StatementPatternNode used on opensource projects

Example 1 with StatementPatternNode

use of com.bigdata.rdf.sparql.ast.StatementPatternNode in project wikidata-query-rdf by wikimedia.

the class EmptyLabelServiceOptimizer method optimizeJoinGroup.

@Override
protected void optimizeJoinGroup(AST2BOpContext ctx, StaticAnalysis sa, IBindingSet[] bSets, JoinGroupNode op) {
    final QueryRoot root = sa.getQueryRoot();
    if (root.getQueryType() == QueryType.ASK) {
        return;
    }
    if (root.getWhereClause() == op) {
        op.setProperty(LABEL_SERVICE_PROJECTION, root.getProjection());
    }
    op.getChildren(SubqueryBase.class).forEach(node -> {
        if (node.getWhereClause() != null) {
            BOp whereClause = node.getWhereClause();
            whereClause.setProperty(LABEL_SERVICE_PROJECTION, node.getProjection());
        }
    });
    // Prepare a set of vars, which might be bound both outside of the service and by LabelService
    // Fix for the issue: https://phabricator.wikimedia.org/T159723
    // See also patch for the com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.addServiceCall()
    Set<IVariable<?>> uncertainVars = collectUncertainVars(sa, bSets, op);
    getLabelServiceNodes(op).forEach(service -> {
        service.setUncertainVars(uncertainVars);
        JoinGroupNode g = (JoinGroupNode) service.getGraphPattern();
        boolean foundArg = false;
        for (BOp st : g.args()) {
            StatementPatternNode sn = (StatementPatternNode) st;
            if (sn.s().isConstant() && BD.SERVICE_PARAM.equals(sn.s().getValue())) {
                continue;
            }
            foundArg = true;
            break;
        }
        if (restoreExtracted(service)) {
            foundArg = true;
        }
        if (!foundArg) {
            addResolutions(ctx, g, getProjectionNode(service));
        }
    });
}

Example 2 with StatementPatternNode

use of com.bigdata.rdf.sparql.ast.StatementPatternNode in project wikidata-query-rdf by wikimedia.

the class MWApiServiceFactory method serviceParamsFromNode.

/**
 * Get service params from Service Node.
 * FIXME: copypaste from ServiceParams.java, should be integrated there
 */
private ServiceParams serviceParamsFromNode(final ServiceNode serviceNode) {
    requireNonNull(serviceNode, "Service node is null?");
    final GraphPatternGroup<IGroupMemberNode> group = serviceNode.getGraphPattern();
    requireNonNull(group, "Group node is null?");
    final ServiceParams serviceParams = new ServiceParams();
    for (IGroupMemberNode node : group) {
        if (node instanceof StatementPatternNode) {
            final StatementPatternNode sp = (StatementPatternNode) node;
            final TermNode s = sp.s();
            if (s.isConstant() && BD.SERVICE_PARAM.equals(s.getValue())) {
                if (sp.p().isVariable()) {
                    throw new RuntimeException("not a valid service param triple pattern, " + "predicate must be constant: " + sp);
                }
                final URI param = (URI) sp.p().getValue();
                serviceParams.add(param, sp.o());
            }
        }
    }
    return serviceParams;
}

Example 3 with StatementPatternNode

use of com.bigdata.rdf.sparql.ast.StatementPatternNode in project wikidata-query-rdf by wikimedia.

the class GeoAroundService method buildServiceNode.

@Override
protected JoinGroupNode buildServiceNode(ServiceCallCreateParams params, ServiceParams serviceParams) {
    final AbstractTripleStore store = params.getTripleStore();
    final Vocabulary voc = store.getVocabulary();
    BigdataValueFactory vf = store.getValueFactory();
    final StatementPatternNode pattern = getPatternNode(params);
    final TermNode searchVar = pattern.s();
    final TermNode predicate = pattern.p();
    final TermNode locationVar = pattern.o();
    final JoinGroupNode newGroup = new JoinGroupNode();
    // ?var geo:search "inCircle" .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SEARCH)), new DummyConstantNode(vf.createLiteral(GeoFunction.IN_CIRCLE.toString()))));
    // ?var geo:predicate wdt:P625 .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.PREDICATE)), predicate));
    // ?var geo:searchDatatype ogc:wktLiteral .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SEARCH_DATATYPE)), new ConstantNode(voc.getConstant(new URIImpl(GeoSparql.WKT_LITERAL)))));
    // ?var geo:spatialCircleCenter ?parisLoc .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_CIRCLE_CENTER)), getParam(serviceParams, CENTER_PARAM)));
    // ?var geo:spatialCircleRadius "1" .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_CIRCLE_RADIUS)), getParam(serviceParams, RADIUS_PARAM)));
    // ?var geo:locationValue ?location .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.LOCATION_VALUE)), locationVar));
    // ?var geo:coordSystem "0" .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.COORD_SYSTEM)), getGlobeNode(vf, serviceParams)));
    final TermNode distance = serviceParams.get(DISTANCE_PARAM, null);
    if (distance != null) {
        // ?var geo:distanceValue ?distance .
        newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.DISTANCE_VALUE)), distance));
    }
    return newGroup;
}

Example 4 with StatementPatternNode

use of com.bigdata.rdf.sparql.ast.StatementPatternNode in project wikidata-query-rdf by wikimedia.

the class GeoService method getRequiredBound.

@Override
public Set<IVariable<?>> getRequiredBound(final ServiceNode serviceNode) {
    /**
     * This method extracts exactly those variables that are incoming,
     * i.e. must be bound before executing the execution of the service.
     *
     * Those can be only in service parameters.
     */
    final Set<IVariable<?>> requiredBound = new HashSet<>();
    for (StatementPatternNode sp : getStatementPatterns(serviceNode)) {
        final TermNode subj = sp.s();
        final IVariableOrConstant<?> object = sp.o().getValueExpression();
        if (subj.isConstant() && BD.SERVICE_PARAM.equals(subj.getValue()) && object instanceof IVariable<?>) {
            // the subject var is what we return
            requiredBound.add((IVariable<?>) object);
        }
    }
    return requiredBound;
}

Example 5 with StatementPatternNode

use of com.bigdata.rdf.sparql.ast.StatementPatternNode in project wikidata-query-rdf by wikimedia.

the class LabelServiceUnitTest method desiredVars.

@SuppressWarnings("unchecked")
@Test
public void desiredVars() {
    JoinGroupNode patterns = new JoinGroupNode();
    // Label
    patterns.addArg(new StatementPatternNode(new VarNode("item"), createURI(RDFS.LABEL), new VarNode("itemLabel")));
    // Description
    patterns.addArg(new StatementPatternNode(new VarNode("item2"), createURI(SchemaDotOrg.DESCRIPTION), new VarNode("itemDesc")));
    // Fixed name
    patterns.addArg(new StatementPatternNode(createURI(uris().entityIdToURI("Q123")), createURI(RDFS.LABEL), new VarNode("qLabel")));
    // Parameters
    patterns.addArg(new StatementPatternNode(createURI(BD.SERVICE_PARAM), createURI(LabelService.LANGUAGE_PARAM), createConstant("en,fr")));
    ServiceNode serviceNode = new ServiceNode(createURI(LabelService.SERVICE_KEY), patterns);
    final LabelService service = new LabelService();
    Set<IVariable<?>> vars = service.getDesiredBound(serviceNode);
    assertThat(vars, hasSize(2));
    assertThat(vars, hasItems(equalTo(Var.var("item")), equalTo(Var.var("item2"))));
}