public object Evaluate (XslTransformProcessor p)
{
if (select != null) {
object o = p.Evaluate (select);
// To resolve variable references correctly, we
// have to collect all the target nodes here.
// (otherwise, variables might be resolved with
// different level of variable stack in
// XslTransformProcessor).
if (o is XPathNodeIterator) {
ArrayList al = new ArrayList ();
XPathNodeIterator iter = (XPathNodeIterator) o;
while (iter.MoveNext ())
al.Add (iter.Current.Clone ());
o = new ListIterator (al, p.XPathContext);
}
return o;
} else if (content != null) {
DTMXPathDocumentWriter2 w = new DTMXPathDocumentWriter2 (p.Root.NameTable, 200);
Outputter outputter = new GenericOutputter(w, p.Outputs, null, true);
p.PushOutput (outputter);
if (p.CurrentNodeset.CurrentPosition == 0)
p.NodesetMoveNext ();
content.Evaluate (p);
p.PopOutput ();
return w.CreateDocument ().CreateNavigator ();
} else {
return "";
}
}
// Invoked from XsltKey (XPathFunction)
public BaseIterator Evaluate (BaseIterator iter,
Expression valueExpr)
{
XPathNodeIterator i = iter;
if (iter.CurrentPosition == 0) {
i = iter.Clone ();
i.MoveNext ();
}
XPathNavigator nav = i.Current;
object o = valueExpr.Evaluate (iter);
XPathNodeIterator it = o as XPathNodeIterator;
XsltContext ctx = iter.NamespaceManager as XsltContext;
BaseIterator result = null;
if (it != null) {
while (it.MoveNext()) {
ArrayList nodes = GetNodesByValue (
nav, it.Current.Value, ctx);
if (nodes == null)
continue;
ListIterator tmp =
new ListIterator (nodes, ctx);
if (result == null)
result = tmp;
else
result = new UnionIterator (
iter, result, tmp);
}
}
else if (nav != null) {
ArrayList nodes = GetNodesByValue (
nav, XPathFunctions.ToString (o), ctx);
if (nodes != null)
result = new ListIterator (nodes, ctx);
}
return result != null ? result : new NullIterator (iter);
}
private ListIterator (ListIterator other) : base (other)
{
_list = other._list;
}
private ListIterator(ListIterator other) : base(other)
{
this._list = other._list;
}