Examples with Focus org.eclipse.wst.xml.xpath2.processor.internal.Focus used on opensource projects

Example 6 with Focus

use of org.eclipse.wst.xml.xpath2.processor.internal.Focus in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method visit.

/**
 * visit context item expression.
 *
 * @param e
 *            is the context item expression.
 * @return a result sequence
 */
public Object visit(CntxItemExpr e) {
    ResultBuffer rs = new ResultBuffer();
    AnyType contextItem = focus().context_item();
    if (contextItem == null) {
        report_error(DynamicError.contextUndefined());
    }
    rs.add(contextItem);
    return rs.getSequence();
}

Example 7 with Focus

use of org.eclipse.wst.xml.xpath2.processor.internal.Focus in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method root_self_node.

private ResultSequence root_self_node() {
    Axis axis = new SelfAxis();
    ResultBuffer buffer = new ResultBuffer();
    // XXX the cast!!!
    axis.iterate((NodeType) focus().context_item(), buffer, _dc.getLimitNode());
    ResultSequence rs = kind_test(buffer.getSequence(), NodeType.class);
    List records = new ArrayList();
    records.add(rs);
    rs = FnRoot.fn_root(records, _ec);
    return rs;
}

Example 8 with Focus

use of org.eclipse.wst.xml.xpath2.processor.internal.Focus in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method visit.

/**
 * visit axis step.
 *
 * @param e
 *            is the axis step.
 * @return a result sequence
 */
public Object visit(AxisStep e) {
    ResultSequence rs = (ResultSequence) e.step().accept(this);
    if (e.predicate_count() == 0)
        return rs;
    // I take it predicates are logical ANDS...
    Focus original_focus = focus();
    // go through all predicates
    for (Iterator i = e.iterator(); i.hasNext(); ) {
        // empty results... get out of here ? XXX
        if (rs.size() == 0)
            break;
        set_focus(new Focus(rs));
        rs = do_predicate((Collection) i.next());
    }
    // restore focus [context switching ;D ]
    set_focus(original_focus);
    return rs;
}

Example 9 with Focus

use of org.eclipse.wst.xml.xpath2.processor.internal.Focus in project webtools.sourceediting by eclipse.

the class DefaultEvaluator method do_predicate.

// do the predicate for all items in focus
private ResultSequence do_predicate(Collection exprs) {
    ResultBuffer rs = new ResultBuffer();
    Focus focus = focus();
    int original_cp = focus.position();
    // check if predicate is single numeric constant
    if (exprs.size() == 1) {
        Expr expr = (Expr) exprs.iterator().next();
        if (expr instanceof XPathExpr) {
            XPathExpr xpe = (XPathExpr) expr;
            if (xpe.next() == null && xpe.slashes() == 0 && xpe.expr() instanceof FilterExpr) {
                FilterExpr fex = (FilterExpr) xpe.expr();
                if (fex.primary() instanceof IntegerLiteral) {
                    int pos = (((IntegerLiteral) fex.primary()).value().int_value()).intValue();
                    if (pos <= focus.last() && pos > 0) {
                        focus.set_position(pos);
                        rs.add(focus.context_item());
                    }
                    focus.set_position(original_cp);
                    return rs.getSequence();
                }
            }
        }
    }
    // go through all elements
    while (true) {
        // do the predicate
        // XXX saxon doesn't allow for predicates to have
        // commas... but XPath 2.0 spec seems to do
        ResultSequence res = do_expr(exprs.iterator());
        // in the sequence
        if (predicate_truth(res))
            rs.add(focus().context_item());
        if (!focus.advance_cp())
            break;
    }
    // restore
    focus.set_position(original_cp);
    return rs.getSequence();
}