Examples with ResultBuffer org.eclipse.wst.xml.xpath2.api.ResultBuffer used on opensource projects

Example 21 with ResultBuffer

use of org.eclipse.wst.xml.xpath2.api.ResultBuffer in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method descendant_or_self_node.

private ResultSequence descendant_or_self_node(ResultSequence rs) {
    ResultBuffer res = new ResultBuffer();
    Axis axis = new DescendantOrSelfAxis();
    // for all nodes, get descendant or self nodes
    for (Iterator i = rs.iterator(); i.hasNext(); ) {
        NodeType item = (NodeType) i.next();
        axis.iterate(item, res, _dc.getLimitNode());
    }
    return res.getSequence();
}

Example 22 with ResultBuffer

use of org.eclipse.wst.xml.xpath2.api.ResultBuffer in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method do_expr.

// basically the comma operator...
private ResultSequence do_expr(Iterator i) {
    ResultSequence rs = null;
    ResultBuffer buffer = null;
    while (i.hasNext()) {
        Expr e = (Expr) i.next();
        ResultSequence result = (ResultSequence) e.accept(this);
        if (rs == null && buffer == null)
            rs = result;
        else {
            if (buffer == null) {
                buffer = new ResultBuffer();
                buffer.concat(rs);
                rs = null;
            }
            buffer.concat(result);
        }
    }
    if (buffer != null) {
        return buffer.getSequence();
    } else if (rs != null) {
        return rs;
    } else
        return ResultBuffer.EMPTY;
}

Example 23 with ResultBuffer

use of org.eclipse.wst.xml.xpath2.api.ResultBuffer in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method visit.

/**
 * visit a name test expression
 *
 * @param e
 *            is thename test.
 * @return a result sequence
 */
public Object visit(NameTest e) {
    QName name = e.name();
    // get the arguments
    Pair arg = (Pair) _param;
    String type = (String) arg._one;
    ResultSequence rs = (ResultSequence) arg._two;
    ResultBuffer rb = new ResultBuffer();
    for (Iterator i = rs.iterator(); i.hasNext(); ) {
        NodeType nt = (NodeType) i.next();
        // check if node passes name test
        if (name_test(nt, name, type))
            rb.add(nt);
    }
    rs = rb.getSequence();
    arg._two = rs;
    return rs;
}

Example 24 with ResultBuffer

use of org.eclipse.wst.xml.xpath2.api.ResultBuffer in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method do_step.

// this will evaluate the step expression for the whole focus and return
// the result.
// 
// i.e. It will execute the step expression for each item in the focus
// [each time changing the context item].
private ResultSequence do_step(StepExpr se) {
    ResultBuffer rs = new ResultBuffer();
    ArrayList results = new ArrayList();
    // 0: don't know yet
    int type = 0;
    // 1: atomic
    // 2: node
    Focus focus = focus();
    int original_pos = focus.position();
    // execute step for all items in focus
    while (true) {
        results.add(se.accept(this));
        // go to next
        if (!focus.advance_cp())
            break;
    }
    // make sure we didn't change focus
    focus.set_position(original_pos);
    boolean node_types = false;
    // check the results
    for (Iterator i = results.iterator(); i.hasNext(); ) {
        ResultSequence result = (ResultSequence) i.next();
        // make sure results are of same type, and add them in
        for (Iterator j = result.iterator(); j.hasNext(); ) {
            AnyType item = (AnyType) j.next();
            // first item
            if (type == 0) {
                if (item instanceof AnyAtomicType)
                    type = 1;
                else if (item instanceof NodeType)
                    type = 2;
                else
                    assert false;
            }
            // make sure we got coherent types
            switch(type) {
                // atomic... just concat
                case 1:
                    if (!(item instanceof AnyAtomicType))
                        report_error(TypeError.mixed_vals(null));
                    rs.add(item);
                    break;
                case 2:
                    node_types = true;
                    if (!(item instanceof NodeType))
                        report_error(TypeError.mixed_vals(null));
                    rs.add(item);
                    break;
                default:
                    assert false;
            }
        }
    }
    // XXX lame
    if (node_types) {
        rs = NodeType.linarize(rs);
    }
    return rs.getSequence();
}

Example 25 with ResultBuffer

use of org.eclipse.wst.xml.xpath2.api.ResultBuffer in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method do_for_each.

private void do_for_each(ListIterator iter, Expr finalexpr, ResultBuffer destination) {
    // we have more vars to bind...
    if (iter.hasNext()) {
        VarExprPair ve = (VarExprPair) iter.next();
        // evaluate binding sequence
        ResultSequence rs = (ResultSequence) ve.expr().accept(this);
        // XXX
        if (rs.empty()) {
            iter.previous();
            return;
        }
        QName varname = ve.varname();
        for (Iterator i = rs.iterator(); i.hasNext(); ) {
            AnyType item = (AnyType) i.next();
            pushScope(varname, item);
            do_for_each(iter, finalexpr, destination);
            popScope();
        }
        iter.previous();
    } else // we finally got to do the "last expression"
    {
        destination.concat((ResultSequence) finalexpr.accept(this));
    }
}