Examples with ExprVar org.apache.jena.sparql.expr.ExprVar used on opensource projects

Example 51 with ExprVar

use of org.apache.jena.sparql.expr.ExprVar 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;
}