Examples with OpUnion org.apache.jena.sparql.algebra.op.OpUnion used on opensource projects

Example 1 with OpUnion

use of org.apache.jena.sparql.algebra.op.OpUnion in project webofneeds by researchstudio-sat.

the class SparqlMatcherActor method defaultQuery.

private Optional<Op> defaultQuery(AtomModelWrapper atom) {
    Model model = atom.getAtomModel();
    String atomURI = atom.getAtomUri();
    ArrayList<Op> queries = new ArrayList<>(3);
    Statement seeks = model.getProperty(model.createResource(atomURI), model.createProperty("https://w3id.org/won/matching#seeks"));
    if (seeks != null) {
        Op seeksQuery = createAtomQuery(model, seeks);
        if (seeksQuery != null) {
            queries.add(seeksQuery);
        }
    }
    Statement search = model.getProperty(model.createResource(atomURI), model.createProperty("https://w3id.org/won/matching#searchString"));
    if (search != null) {
        String searchString = search.getString();
        queries.add(SparqlMatcherUtils.createSearchQuery(searchString, resultName, 2, true, true));
    }
    return queries.stream().reduce((left, right) -> new OpUnion(left, right)).map((union) -> new OpDistinct(new OpProject(union, Arrays.asList(new Var[] { resultName }))));
}

Example 2 with OpUnion

use of org.apache.jena.sparql.algebra.op.OpUnion in project webofneeds by researchstudio-sat.

the class SparqlMatcherUtils method createSearchQuery.

public static Op createSearchQuery(String searchString, Var resultName, int hops, boolean disjunctive, boolean tokenize) {
    Var textSearchTarget = Var.alloc("textSearchTarget");
    Optional<Op> union = IntStream.range(1, hops + 1).mapToObj(hopCount -> makePathBGPPattern(resultName, textSearchTarget, hopCount, op -> {
        Expr filterExpression = Arrays.stream(tokenize ? searchString.toLowerCase().split(" ") : new String[] { searchString.toLowerCase() }).<Expr>map(searchPart -> new E_StrContains(new E_StrLowerCase(new ExprVar(textSearchTarget)), new NodeValueString(searchPart))).reduce((left, right) -> disjunctive ? new E_LogicalOr(left, right) : new E_LogicalAnd(left, right)).orElse(new NodeValueBoolean(true));
        return OpFilter.filterBy(new ExprList(filterExpression), op);
    })).reduce((op1, op2) -> new OpUnion(op1, op2));
    Op maintriple = new OpTriple(new Triple(resultName, RDF.type.asNode(), WON.Atom.asNode()));
    Op mainOp = union.isPresent() ? OpJoin.create(maintriple, union.get()) : maintriple;
    return mainOp;
}