private Query ProcessAxis(Axis root, Flags flags, out Props props)
{
Query result = null;
if (root.Prefix.Length > 0)
{
_needContext = true;
}
_firstInput = null;
Query qyInput;
{
if (root.Input != null)
{
Flags inputFlags = Flags.None;
if ((flags & Flags.PosFilter) == 0)
{
Axis input = root.Input as Axis;
if (input != null)
{
if (
root.TypeOfAxis == Axis.AxisType.Child &&
input.TypeOfAxis == Axis.AxisType.DescendantOrSelf && input.NodeType == XPathNodeType.All
)
{
Query qyGrandInput;
if (input.Input != null)
{
qyGrandInput = ProcessNode(input.Input, Flags.SmartDesc, out props);
}
else
{
qyGrandInput = new ContextQuery();
props = Props.None;
}
result = new DescendantQuery(qyGrandInput, root.Name, root.Prefix, root.NodeType, false, input.AbbrAxis);
if ((props & Props.NonFlat) != 0)
{
result = new DocumentOrderQuery(result);
}
props |= Props.NonFlat;
return result;
}
}
if (root.TypeOfAxis == Axis.AxisType.Descendant || root.TypeOfAxis == Axis.AxisType.DescendantOrSelf)
{
inputFlags |= Flags.SmartDesc;
}
}
qyInput = ProcessNode(root.Input, inputFlags, out props);
}
else
{
qyInput = new ContextQuery();
props = Props.None;
}
}
switch (root.TypeOfAxis)
{
case Axis.AxisType.Ancestor:
result = new XPathAncestorQuery(qyInput, root.Name, root.Prefix, root.NodeType, false);
props |= Props.NonFlat;
break;
case Axis.AxisType.AncestorOrSelf:
result = new XPathAncestorQuery(qyInput, root.Name, root.Prefix, root.NodeType, true);
props |= Props.NonFlat;
break;
case Axis.AxisType.Child:
if ((props & Props.NonFlat) != 0)
{
result = new CacheChildrenQuery(qyInput, root.Name, root.Prefix, root.NodeType);
}
else
{
result = new ChildrenQuery(qyInput, root.Name, root.Prefix, root.NodeType);
}
break;
case Axis.AxisType.Parent:
result = new ParentQuery(qyInput, root.Name, root.Prefix, root.NodeType);
break;
case Axis.AxisType.Descendant:
if ((flags & Flags.SmartDesc) != 0)
{
result = new DescendantOverDescendantQuery(qyInput, false, root.Name, root.Prefix, root.NodeType, /*abbrAxis:*/false);
}
else
{
result = new DescendantQuery(qyInput, root.Name, root.Prefix, root.NodeType, false, /*abbrAxis:*/false);
if ((props & Props.NonFlat) != 0)
{
result = new DocumentOrderQuery(result);
}
}
props |= Props.NonFlat;
break;
case Axis.AxisType.DescendantOrSelf:
if ((flags & Flags.SmartDesc) != 0)
{
result = new DescendantOverDescendantQuery(qyInput, true, root.Name, root.Prefix, root.NodeType, root.AbbrAxis);
}
else
{
result = new DescendantQuery(qyInput, root.Name, root.Prefix, root.NodeType, true, root.AbbrAxis);
if ((props & Props.NonFlat) != 0)
{
result = new DocumentOrderQuery(result);
}
}
props |= Props.NonFlat;
break;
case Axis.AxisType.Preceding:
result = new PrecedingQuery(qyInput, root.Name, root.Prefix, root.NodeType);
props |= Props.NonFlat;
break;
case Axis.AxisType.Following:
result = new FollowingQuery(qyInput, root.Name, root.Prefix, root.NodeType);
props |= Props.NonFlat;
break;
case Axis.AxisType.FollowingSibling:
result = new FollSiblingQuery(qyInput, root.Name, root.Prefix, root.NodeType);
if ((props & Props.NonFlat) != 0)
{
result = new DocumentOrderQuery(result);
}
break;
case Axis.AxisType.PrecedingSibling:
result = new PreSiblingQuery(qyInput, root.Name, root.Prefix, root.NodeType);
break;
case Axis.AxisType.Attribute:
result = new AttributeQuery(qyInput, root.Name, root.Prefix, root.NodeType);
break;
case Axis.AxisType.Self:
result = new XPathSelfQuery(qyInput, root.Name, root.Prefix, root.NodeType);
break;
case Axis.AxisType.Namespace:
if ((root.NodeType == XPathNodeType.All || root.NodeType == XPathNodeType.Element || root.NodeType == XPathNodeType.Attribute) && root.Prefix.Length == 0)
{
result = new NamespaceQuery(qyInput, root.Name, root.Prefix, root.NodeType);
}
else
{
result = new EmptyQuery();
}
break;
default:
throw XPathException.Create(SR.Xp_NotSupported, _query);
}
return result;
}
private DocumentOrderQuery(DocumentOrderQuery other) : base(other) { }
private DocumentOrderQuery(DocumentOrderQuery other) : base((CacheOutputQuery) other)
{
}
private Query ProcessAxis(Axis root, Flags flags, out Props props)
{
Query qyParent = null;
Query query2;
if (root.Prefix.Length > 0)
{
this.needContext = true;
}
this.firstInput = null;
if (root.Input != null)
{
Flags none = Flags.None;
if ((flags & Flags.PosFilter) == Flags.None)
{
Axis input = root.Input as Axis;
if (((input != null) && (root.TypeOfAxis == Axis.AxisType.Child)) && ((input.TypeOfAxis == Axis.AxisType.DescendantOrSelf) && (input.NodeType == XPathNodeType.All)))
{
Query query3;
if (input.Input != null)
{
query3 = this.ProcessNode(input.Input, Flags.SmartDesc, out props);
}
else
{
query3 = new ContextQuery();
props = Props.None;
}
qyParent = new DescendantQuery(query3, root.Name, root.Prefix, root.NodeType, false, input.AbbrAxis);
if ((props & Props.NonFlat) != Props.None)
{
qyParent = new DocumentOrderQuery(qyParent);
}
props |= Props.NonFlat;
return qyParent;
}
if ((root.TypeOfAxis == Axis.AxisType.Descendant) || (root.TypeOfAxis == Axis.AxisType.DescendantOrSelf))
{
none |= Flags.SmartDesc;
}
}
query2 = this.ProcessNode(root.Input, none, out props);
}
else
{
query2 = new ContextQuery();
props = Props.None;
}
switch (root.TypeOfAxis)
{
case Axis.AxisType.Ancestor:
qyParent = new XPathAncestorQuery(query2, root.Name, root.Prefix, root.NodeType, false);
props |= Props.NonFlat;
return qyParent;
case Axis.AxisType.AncestorOrSelf:
qyParent = new XPathAncestorQuery(query2, root.Name, root.Prefix, root.NodeType, true);
props |= Props.NonFlat;
return qyParent;
case Axis.AxisType.Attribute:
return new AttributeQuery(query2, root.Name, root.Prefix, root.NodeType);
case Axis.AxisType.Child:
if ((props & Props.NonFlat) == Props.None)
{
return new ChildrenQuery(query2, root.Name, root.Prefix, root.NodeType);
}
return new CacheChildrenQuery(query2, root.Name, root.Prefix, root.NodeType);
case Axis.AxisType.Descendant:
if ((flags & Flags.SmartDesc) == Flags.None)
{
qyParent = new DescendantQuery(query2, root.Name, root.Prefix, root.NodeType, false, false);
if ((props & Props.NonFlat) != Props.None)
{
qyParent = new DocumentOrderQuery(qyParent);
}
break;
}
qyParent = new DescendantOverDescendantQuery(query2, false, root.Name, root.Prefix, root.NodeType, false);
break;
case Axis.AxisType.DescendantOrSelf:
if ((flags & Flags.SmartDesc) == Flags.None)
{
qyParent = new DescendantQuery(query2, root.Name, root.Prefix, root.NodeType, true, root.AbbrAxis);
if ((props & Props.NonFlat) != Props.None)
{
qyParent = new DocumentOrderQuery(qyParent);
}
}
else
{
qyParent = new DescendantOverDescendantQuery(query2, true, root.Name, root.Prefix, root.NodeType, root.AbbrAxis);
}
props |= Props.NonFlat;
return qyParent;
case Axis.AxisType.Following:
qyParent = new FollowingQuery(query2, root.Name, root.Prefix, root.NodeType);
props |= Props.NonFlat;
return qyParent;
case Axis.AxisType.FollowingSibling:
qyParent = new FollSiblingQuery(query2, root.Name, root.Prefix, root.NodeType);
if ((props & Props.NonFlat) != Props.None)
{
qyParent = new DocumentOrderQuery(qyParent);
}
return qyParent;
case Axis.AxisType.Namespace:
if ((((root.NodeType == XPathNodeType.All) || (root.NodeType == XPathNodeType.Element)) || (root.NodeType == XPathNodeType.Attribute)) && (root.Prefix.Length == 0))
{
return new NamespaceQuery(query2, root.Name, root.Prefix, root.NodeType);
}
return new EmptyQuery();
case Axis.AxisType.Parent:
return new ParentQuery(query2, root.Name, root.Prefix, root.NodeType);
case Axis.AxisType.Preceding:
qyParent = new PrecedingQuery(query2, root.Name, root.Prefix, root.NodeType);
props |= Props.NonFlat;
return qyParent;
case Axis.AxisType.PrecedingSibling:
return new PreSiblingQuery(query2, root.Name, root.Prefix, root.NodeType);
case Axis.AxisType.Self:
return new XPathSelfQuery(query2, root.Name, root.Prefix, root.NodeType);
default:
throw XPathException.Create("Xp_NotSupported", this.query);
}
props |= Props.NonFlat;
return qyParent;
}