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

Example 6 with QueryIterPlainWrapper

use of org.apache.jena.sparql.engine.iterator.QueryIterPlainWrapper in project jena by apache.

the class Eval method evalDS.

static Table evalDS(OpDatasetNames opDSN, Evaluator evaluator) {
    Node graphNode = opDSN.getGraphNode();
    if (graphNode.isURI()) {
        if (evaluator.getExecContext().getDataset().containsGraph(graphNode)) {
            return new TableUnit();
        } else // WRONG
        {
            return new TableEmpty();
        }
    }
    if (!Var.isVar(graphNode))
        throw new ARQInternalErrorException("OpDatasetNames: Not a URI or variable: " + graphNode);
    DatasetGraph dsg = evaluator.getExecContext().getDataset();
    Iterator<Node> iter = dsg.listGraphNodes();
    List<Binding> list = new ArrayList<>((int) dsg.size());
    for (; iter.hasNext(); ) {
        Node gn = iter.next();
        Binding b = BindingFactory.binding(Var.alloc(graphNode), gn);
        list.add(b);
    }
    QueryIterator qIter = new QueryIterPlainWrapper(list.iterator(), evaluator.getExecContext());
    return TableFactory.create(qIter);
}

Example 7 with QueryIterPlainWrapper

use of org.apache.jena.sparql.engine.iterator.QueryIterPlainWrapper in project jena by apache.

the class JSONInput method process.

// TODO Streaming version of JSON Result set processing
private SPARQLResult process(InputStream in, Model model) {
    parse(in);
    if (model == null)
        model = GraphFactory.makeJenaDefaultModel();
    if (rows != null) {
        QueryIterator qIter = new QueryIterPlainWrapper(rows.iterator());
        ResultSet rs = new ResultSetStream(Var.varNames(vars), model, qIter);
        super.set(rs);
    } else
        super.set(booleanResult);
    return this;
}

Example 8 with QueryIterPlainWrapper

use of org.apache.jena.sparql.engine.iterator.QueryIterPlainWrapper in project jena by apache.

the class BIOInput method fromBIO.

public static ResultSet fromBIO(InputStream input) {
    // Scan the stream for VARS and accumulate the total variables. 
    // Trade off of guessing first line is all the VARS and coping with
    // anything possible.  -> Cope with anything possible.
    BindingInputStream bin = new BindingInputStream(input);
    List<Binding> bindings = new ArrayList<>();
    List<Var> vars = new ArrayList<>();
    while (bin.hasNext()) {
        Binding b = bin.next();
        bindings.add(b);
        for (Var v : bin.vars()) {
            if (!vars.contains(v))
                vars.add(v);
        }
    }
    QueryIterator qIter = new QueryIterPlainWrapper(bindings.iterator());
    return new ResultSetStream(Var.varNames(vars), m, qIter);
}