Examples with QueryIterator org.apache.jena.sparql.engine.QueryIterator used on opensource projects

Example 61 with QueryIterator

use of org.apache.jena.sparql.engine.QueryIterator in project jena by apache.

the class sse_query method exec.

@Override
protected void exec() {
    Op op = modAlgebra.getOp();
    if (op == null) {
        System.err.println("No query expression to execute");
        throw new TerminationException(9);
    }
    Dataset dataset = modDataset.getDataset();
    // Check there is a dataset.
    if (dataset == null)
        dataset = DatasetFactory.createGeneral();
    modTime.startTimer();
    DatasetGraph dsg = dataset.asDatasetGraph();
    if (printOp || printPlan) {
        if (printOp) {
            divider();
            IndentedWriter out = new IndentedWriter(System.out, true);
            op.output(out);
            out.flush();
        }
        if (printPlan) {
            QueryIterator qIter = Algebra.exec(op, dsg);
            Plan plan = new PlanOp(op, null, qIter);
            divider();
            IndentedWriter out = new IndentedWriter(System.out, false);
            plan.output(out);
            out.flush();
        }
    //return ;
    }
    // Do not optimize.  Execute as-is.
    QueryExecUtils.execute(op, dsg, modResults.getResultsFormat());
    long time = modTime.endTimer();
    if (modTime.timingEnabled())
        System.out.println("Time: " + modTime.timeStr(time));
}

Example 62 with QueryIterator

use of org.apache.jena.sparql.engine.QueryIterator in project jena by apache.

the class TestPath method eval.

private static List<Binding> eval(Graph graph, Node start, String pathStr, Node finish) {
    Path path = SSE.parsePath(pathStr, pmap);
    QueryIterator qIter = PathLib.execTriplePath(BindingFactory.root(), start, path, finish, new ExecutionContext(ARQ.getContext(), graph, null, null));
    return Iter.toList(qIter);
}

Example 63 with QueryIterator

use of org.apache.jena.sparql.engine.QueryIterator in project jena by apache.

the class TestResultSet method make.

private ResultSet make(String var1, Node val1, String var2, Node val2) {
    BindingMap b = BindingFactory.create();
    b.add(Var.alloc(var1), val1);
    b.add(Var.alloc(var2), val2);
    List<String> vars = new ArrayList<>();
    vars.add(var1);
    vars.add(var2);
    QueryIterator qIter = QueryIterSingleton.create(b, null);
    ResultSet rs = new ResultSetStream(vars, null, qIter);
    return rs;
}

Example 64 with QueryIterator

use of org.apache.jena.sparql.engine.QueryIterator in project jena by apache.

the class TestResultSet method make2.

private ResultSet make2(String var, Node val) {
    BindingMap b1 = BindingFactory.create();
    b1.add(Var.alloc(var), val);
    BindingMap b2 = BindingFactory.create();
    b2.add(Var.alloc(var), val);
    List<String> vars = new ArrayList<>();
    vars.add(var);
    List<Binding> solutions = new ArrayList<>();
    solutions.add(b1);
    solutions.add(b2);
    QueryIterator qIter = new QueryIterPlainWrapper(solutions.iterator(), null);
    ResultSet rs = new ResultSetStream(vars, null, qIter);
    return rs;
}

Example 65 with QueryIterator

use of org.apache.jena.sparql.engine.QueryIterator in project jena by apache.

the class SpatialOperationPFBase method variableSubject.

private QueryIterator variableSubject(Binding binding, Node s, SpatialMatch match, ExecutionContext execCxt) {
    Var v = Var.alloc(s);
    List<Node> r = query(match);
    // Make distinct. Note interaction with limit is imperfect
    r = Iter.iter(r).distinct().toList();
    QueryIterator qIter = new QueryIterExtendByVar(binding, v, r.iterator(), execCxt);
    return qIter;
}