private IQuery ProcessAxis(Axis root , IQuery qyInput, int parent, Axis.AxisType parentaxis) {
IQuery result = null;
String URN = String.Empty;
if ( root.Prefix.Length > 0) {
_hasPrefix = true;
}
hasReverseAxis = false;
switch (root.TypeOfAxis) {
case Axis.AxisType.Ancestor:
result = new XPathAncestorQuery( qyInput , false, root.Name, root.Prefix, URN, root.Type );
_specialAxis = hasReverseAxis = true;
break;
case Axis.AxisType.AncestorOrSelf:
result = new XPathAncestorQuery( qyInput, true, root.Name, root.Prefix, URN, root.Type );
_specialAxis = hasReverseAxis = true;
break;
case Axis.AxisType.Child:
if (_slashslash){
result = new XPathDescendantQuery( qyInput, false, root.Name, root.Prefix, URN, root.Type, abbrAxis);
if (_specialAxis || (qyInput != null && (int)qyInput.getName() > (int) Querytype.Self)) {
result = new CacheQuery(result);
}
_slashslash = false;
_specialAxis = true;
break;
}
if (_specialAxis || (qyInput != null && (int)qyInput.getName() > (int) Querytype.Self))
result = new CacheChildrenQuery( qyInput, root.Name, root.Prefix, URN, root.Type );
else
result = new ChildrenQuery( qyInput, root.Name, root.Prefix, URN, root.Type );
break;
case Axis.AxisType.Parent:
result = new ParentQuery( qyInput, root.Name, root.Prefix, URN, root.Type );
break;
case Axis.AxisType.Descendant:
switch (parent) {
case Smart_D :
result = new SmartXPathDescendantQuery( qyInput, false, root.Name, root.Prefix, URN, root.Type);
break;
case Regular_D :
result = new XPathDescendantQuery(qyInput, false, root.Name, root.Prefix, URN, root.Type);
if (_specialAxis || (qyInput != null && (int)qyInput.getName() > (int) Querytype.Self))
result = new CacheQuery(result);
_specialAxis = true;
break;
}
break;
case Axis.AxisType.DescendantOrSelf:
switch (parent) {
case Smart_D :
result = new SmartXPathDescendantQuery(qyInput, true, root.Name, root.Prefix, URN, root.Type, root.abbrAxis);
break;
case Regular_D :
if ( _smart <= 1 || root.Type != XPathNodeType.All ||
parentaxis != Axis.AxisType.Child) {
result = new XPathDescendantQuery(
qyInput,
true,
root.Name,
root.Prefix,
URN,
root.Type,
root.abbrAxis);
if (_specialAxis || (qyInput != null && (int)qyInput.getName() > (int) Querytype.Self))
result = new CacheQuery(result);
_specialAxis = true;
}
else
{
_slashslash = true;
abbrAxis = root.abbrAxis;
result = qyInput;
}
break;
}
break;
case Axis.AxisType.Preceding:
result = new PrecedingQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
_specialAxis = hasReverseAxis = true;
break;
case Axis.AxisType.Following :
result = new FollowingQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
_specialAxis = true;
break;
case Axis.AxisType.FollowingSibling :
result = new FollSiblingQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
if (_specialAxis || (qyInput != null && (int)qyInput.getName() > (int) Querytype.Self)) {
result = new DocumentOrderQuery(result);
}
break;
case Axis.AxisType.PrecedingSibling :
result = new PreSiblingQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
hasReverseAxis = true;
break;
case Axis.AxisType.Attribute:
result = new AttributeQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
break;
case Axis.AxisType.Self:
result = new XPathSelfQuery(
qyInput,
root.Name,
root.Prefix,
URN,
root.Type);
break;
case Axis.AxisType.Namespace:
if (
(root.Type == XPathNodeType.All || root.Type == XPathNodeType.Element || root.Type == XPathNodeType.Attribute) &&
root.Prefix == string.Empty
) {
result = new NamespaceQuery(qyInput, root.Name, root.Prefix, URN, root.Type);
}
else {
result = new EmptyNamespaceQuery();
}
break;
default:
throw new XPathException(Res.Xp_NotSupported, _query);
}
return result;
}
