private Query ProcessNode(AstNode root, Flags flags, out Props props)
{
if (++parseDepth > MaxParseDepth)
{
throw XPathException.Create(Res.Xp_QueryTooComplex);
}
Debug.Assert(root != null, "root != null");
Query result = null;
props = Props.None;
switch (root.Type)
{
case AstNode.AstType.Axis:
result = ProcessAxis((Axis)root, flags, out props);
break;
case AstNode.AstType.Operator:
result = ProcessOperator((Operator)root, out props);
break;
case AstNode.AstType.Filter:
result = ProcessFilter((Filter)root, flags, out props);
break;
case AstNode.AstType.ConstantOperand:
result = new OperandQuery(((Operand)root).OperandValue);
break;
case AstNode.AstType.Variable:
result = ProcessVariable((Variable)root);
break;
case AstNode.AstType.Function:
result = ProcessFunction((Function)root, out props);
break;
case AstNode.AstType.Group:
result = new GroupQuery(ProcessNode(((Group)root).GroupNode, Flags.None, out props));
break;
case AstNode.AstType.Root:
result = new AbsoluteQuery();
break;
default:
Debug.Assert(false, "Unknown QueryType encountered!!");
break;
}
--parseDepth;
return(result);
}
private AbsoluteQuery(AbsoluteQuery other) : base(other)
{
}