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

Example 41 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class BinRDF method writeResultSet.

public static void writeResultSet(TProtocol protocol, ResultSet resultSet, boolean encodeValues) {
    List<Var> vars = Var.varList(resultSet.getResultVars());
    try (Binding2Thrift b2t = new Binding2Thrift(protocol, vars, encodeValues)) {
        for (; resultSet.hasNext(); ) {
            Binding b = resultSet.nextBinding();
            b2t.output(b);
        }
    }
//Done by Binding2Thrift.close() -- LibThriftRDF.flush(protocol) ;
}

Example 42 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class EvaluatorSimple method filter.

@Override
public Table filter(ExprList expressions, Table table) {
    if (debug) {
        System.out.println("Restriction");
        System.out.println(expressions);
        dump(table);
    }
    QueryIterator iter = table.iterator(execCxt);
    List<Binding> output = new ArrayList<>();
    for (; iter.hasNext(); ) {
        Binding b = iter.nextBinding();
        if (expressions.isSatisfied(b, execCxt))
            output.add(b);
    }
    return new TableN(new QueryIterPlainWrapper(output.iterator(), execCxt));
}

Example 43 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class EvaluatorSimple method minusWorker.

private Table minusWorker(Table tableLeft, Table tableRight) {
    // Minus(Ω1, Ω2) = { μ | μ in Ω1 such that for all μ' in Ω2, either μ and μ' are not compatible or dom(μ) and dom(μ') are disjoint }
    TableN results = new TableN();
    QueryIterator iterLeft = tableLeft.iterator(execCxt);
    for (; iterLeft.hasNext(); ) {
        Binding bindingLeft = iterLeft.nextBinding();
        boolean includeThisRow = true;
        // Find a reason not to include the row.
        // That's is not disjoint and not compatible.
        QueryIterator iterRight = tableRight.iterator(execCxt);
        for (; iterRight.hasNext(); ) {
            Binding bindingRight = iterRight.nextBinding();
            if (Algebra.disjoint(bindingLeft, bindingRight))
                // Disjoint - not a reason to exclude
                continue;
            if (!Algebra.compatible(bindingLeft, bindingRight))
                // Compatible - not a reason to exclude.
                continue;
            includeThisRow = false;
            break;
        }
        iterRight.close();
        if (includeThisRow)
            results.addBinding(bindingLeft);
    }
    iterLeft.close();
    return results;
}

Example 44 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class OpExecutor method debug.

// Use this to debug evaluation
// Example:
// input = debug(input) ;
private QueryIterator debug(String marker, QueryIterator input) {
    List<Binding> x = all(input);
    for (Binding b : x) {
        System.out.print(marker);
        System.out.print(": ");
        System.out.println(b);
    }
    return new QueryIterPlainWrapper(x.iterator(), execCxt);
}

Example 45 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class EvaluatorSimple method diffWorker.

// @@ Abstract compatibility
private Table diffWorker(Table tableLeft, Table tableRight) {
    QueryIterator left = tableLeft.iterator(execCxt);
    TableN r = new TableN();
    for (; left.hasNext(); ) {
        Binding b = left.nextBinding();
        if (tableRight.contains(b))
            r.addBinding(b);
    }
    tableLeft.close();
    tableRight.close();
    return r;
}