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

Example 1 with IntegerLiteral

use of org.eclipse.wst.xml.xpath2.processor.internal.ast.IntegerLiteral 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();
}