public override object Execute(IContextProvider provider, object[] dataPool)
{
bool orderedSet = _isOrderedSet;
bool special = provider != null &&
provider.Context.GetType().Name == "XPathDocumentNavigator";
XPath2NodeIterator tail;
if (_path[0].type == XPath2ExprType.Expr)
{
tail = XPath2NodeIterator.Create(_path[0].node.Execute(provider, dataPool));
if (!(_path[0].node is OrderedBinaryOperatorNode))
{
orderedSet = orderedSet & tail.IsSingleIterator;
}
}
else
{
tail = _path[0].Create(Context, dataPool,
XPath2NodeIterator.Create(CoreFuncs.ContextNode(provider)), special);
}
for (int k = 1; k < _path.Length; k++)
{
tail = _path[k].Create(Context, dataPool, tail, special);
}
if (!orderedSet)
{
return(new DocumentOrderNodeIterator(tail));
}
return(tail);
}
public override object Execute(IContextProvider provider, object[] dataPool)
{
XPath2NodeIterator iter = XPath2NodeIterator.Create(this[0].Execute(provider, dataPool));
for (int k = 1; k < Count; k++)
{
iter = new NodeIterator(CreateEnumerator(dataPool, this[k], iter));
}
return(iter);
}
protected override XPathItem NextItem()
{
while (true)
{
if (iter == null)
{
if (!baseIter.MoveNext())
{
return(null);
}
sequentialPosition = 0;
iter = XPath2NodeIterator.Create(node.Execute(new NodeProvider(baseIter.Current), dataPool));
}
if (iter.MoveNext())
{
sequentialPosition++;
return(iter.Current);
}
iter = null;
}
}
public override object Execute(IContextProvider provider, object[] dataPool)
{
return(new ForIterator(this, provider, dataPool,
XPath2NodeIterator.Create(this[0].Execute(provider, dataPool))));
}