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

Example 86 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class QueryValidatorJSON method algebraOptQuads.

private static void algebraOptQuads(JsonBuilder obj, Query query) {
    Op op = Algebra.compile(query);
    op = Algebra.toQuadForm(op);
    op = Algebra.optimize(op);
    obj.key(jAlgebraOptQuads).value(string(query, op));
}

Example 87 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class QueryValidatorJSON method algebra.

private static void algebra(JsonBuilder obj, Query query) {
    Op op = Algebra.compile(query);
    obj.key(jAlgebra).value(string(query, op));
}

Example 88 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class QueryEngineBase method createPlan.

protected Plan createPlan() {
    // Decide the algebra to actually execute.
    Op op = queryOp;
    if (!startBinding.isEmpty()) {
        op = Substitute.substitute(op, startBinding);
        context.put(ARQConstants.sysCurrentAlgebra, op);
    // Don't reset the startBinding because it also is
    // needed in the output.
    }
    op = modifyOp(op);
    QueryIterator queryIterator = null;
    if (dataset != null)
        // Null means setting up but not executing a query.
        queryIterator = evaluate(op, dataset, startBinding, context);
    else
        // Bypass management interface
        queryIterator = evaluateNoMgt(op, dataset, startBinding, context);
    // This could be an automagic iterator to catch close.
    return new PlanOp(getOp(), this, queryIterator);
}

Example 89 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class OpExecutor method execute.

protected QueryIterator execute(OpMinus opMinus, QueryIterator input) {
    Op lhsOp = opMinus.getLeft();
    Op rhsOp = opMinus.getRight();
    QueryIterator left = exec(lhsOp, input);
    QueryIterator right = exec(rhsOp, root());
    Set<Var> commonVars = OpVars.visibleVars(lhsOp);
    commonVars.retainAll(OpVars.visibleVars(rhsOp));
    return QueryIterMinus.create(left, right, commonVars, execCxt);
}

Example 90 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class PathLib method pathToTriples.

/** Convert any paths of exactly one predicate to a triple pattern */
public static Op pathToTriples(PathBlock pattern) {
    BasicPattern bp = null;
    Op op = null;
    for (TriplePath tp : pattern) {
        if (tp.isTriple()) {
            if (bp == null)
                bp = new BasicPattern();
            bp.add(tp.asTriple());
            continue;
        }
        // Path form.
        op = flush(bp, op);
        bp = null;
        OpPath opPath2 = new OpPath(tp);
        op = OpSequence.create(op, opPath2);
        continue;
    }
    // End. Finish off any outstanding BGP.
    op = flush(bp, op);
    return op;
}