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

Example 6 with TermNode

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

the class GeoBoxService 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 "inRectangle" .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SEARCH)), new DummyConstantNode(vf.createLiteral(GeoFunction.IN_RECTANGLE.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)))));
    if (serviceParams.contains(NE_PARAM)) {
        // ?var geo:spatialRectangleNorthEast ?ne .
        newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_NORTH_EAST)), getParam(serviceParams, NE_PARAM)));
        // ?var geo:spatialRectangleNorthEast ?sw .
        newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_SOUTH_WEST)), getParam(serviceParams, SW_PARAM)));
    } else if (serviceParams.contains(EAST_PARAM)) {
        final TermNode east = getParam(serviceParams, EAST_PARAM);
        final TermNode west = getParam(serviceParams, WEST_PARAM);
        if (east instanceof ConstantNode && west instanceof ConstantNode) {
            // Easy case - both constants
            final WikibasePoint eastWP = pointFromIV(((ConstantNode) east).getValue().getIV());
            final WikibasePoint westWP = pointFromIV(((ConstantNode) west).getValue().getIV());
            final GeoUtils.Box box = new GeoUtils.Box(eastWP, westWP);
            TermNode ne;
            TermNode sw;
            if (box.switched()) {
                ne = new DummyConstantNode(vf.asValue(vf.createLiteral(box.northEast().toString(), new URIImpl(GeoSparql.WKT_LITERAL))));
                sw = new DummyConstantNode(vf.asValue(vf.createLiteral(box.southWest().toString(), new URIImpl(GeoSparql.WKT_LITERAL))));
            } else {
                ne = east;
                sw = west;
            }
            // ?var geo:spatialRectangleNorthEast ?ne .
            newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_NORTH_EAST)), ne));
            // ?var geo:spatialRectangleNorthEast ?sw .
            newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_SOUTH_WEST)), sw));
        } else {
            // Hard case - non-constants
            // Add dummy var to the node
            serviceParams.add(WRAP_PARAM, VarNode.freshVarNode());
            // ?var geo:spatialRectangleNorthEast ?ne .
            newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_NORTH_EAST)), getSubstituteVar(east)));
            // ?var geo:spatialRectangleNorthEast ?sw .
            newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.SPATIAL_RECTANGLE_SOUTH_WEST)), getSubstituteVar(west)));
        }
    } else {
        throw new IllegalArgumentException("Box corner parameters are required");
    }
    // ?var geo:locationValue ?location .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.LOCATION_VALUE)), locationVar));
    // ?var geo:coordSystem "2" .
    newGroup.addArg(new StatementPatternNode(searchVar, new DummyConstantNode(vf.asValue(GeoSpatial.COORD_SYSTEM)), getGlobeNode(vf, serviceParams)));
    return newGroup;
}

Example 7 with TermNode

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

the class MWApiServiceFactory method getServiceHost.

/**
 * Get service host and check if it's valid.
 * @return Service endpoint.
 * @throws MalformedURLException on bad URL
 */
private Endpoint getServiceHost(final ServiceParams serviceParams) throws MalformedURLException {
    TermNode hostNode = serviceParams.get(ENDPOINT_KEY, null);
    requireNonNull(hostNode, "Service name (wikibase:endpoint) should be supplied");
    serviceParams.clear(ENDPOINT_KEY);
    return Endpoint.create(hostNode.getValueExpression(), config);
}

Example 8 with TermNode

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

the class GeoService method getGlobeNode.

/**
 * Create globe node with appropriate value for coordSystem.
 */
protected TermNode getGlobeNode(BigdataValueFactory vf, ServiceParams serviceParams) {
    final TermNode globeNode = serviceParams.get(GLOBE_PARAM, null);
    if (globeNode == null) {
        return new DummyConstantNode(vf.createLiteral(WKTSerializer.NO_GLOBE));
    }
    if (!globeNode.isConstant()) {
        // FIXME: add support for this
        throw new IllegalArgumentException("Non-constant globe value is not supported yet.");
    }
    BigdataValue v = globeNode.getValue();
    if (v instanceof BigdataURI) {
        WKTSerializer ser = new WKTSerializer();
        try {
            return new DummyConstantNode(vf.createLiteral(ser.trimCoordURI(v.stringValue())));
        } catch (GeoSpatialSearchException e) {
            // Unexpectedly wrong URI - still pass it along
            return globeNode;
        }
    }
    return globeNode;
}