public QilNode XPathNamespace(QilNode expr)
{
return(f.XPathNamespace(expr));
}
/// <summary>
/// Called when all replacements have already been made and all annotations are complete.
/// </summary>
protected virtual QilNode NoReplace(QilNode node)
{
return(node);
}
//-----------------------------------------------
// QilScopedVisitor overrides
//-----------------------------------------------
/// <summary>
/// Annotate this iterator or function with a generated name.
/// </summary>
protected override void BeginScope(QilNode node)
{
this.ngen.NameOf(node);
}
protected override QilNode VisitUnknown(QilNode n)
{
return(NoReplace(n));
}
protected override QilNode VisitXmlContext(QilNode n)
{
return(NoReplace(n));
}
//-----------------------------------------------
// Constructor
//-----------------------------------------------
/// <summary>
/// Construct a new node
/// </summary>
public QilTernary(QilNodeType nodeType, QilNode left, QilNode center, QilNode right) : base(nodeType)
{
_left = left;
_center = center;
_right = right;
}
public static void Validate(QilNode node)
{
Debug.Assert(node != null);
new QilValidationVisitor().VisitAssumeReference(node);
}
/// <summary>
/// If a cloned reference is in scope, replace "oldNode". Otherwise, return "oldNode".
/// </summary>
protected override QilNode VisitReference(QilNode oldNode)
{
QilNode newNode = FindClonedReference(oldNode);
return(base.VisitReference(newNode == null ? oldNode : newNode));
}
//-----------------------------------------------
// QilScopedVisitor methods
//-----------------------------------------------
/// <summary>
/// Push node and its shallow clone onto the substitution list.
/// </summary>
protected override void BeginScope(QilNode node)
{
_subs.AddSubstitutionPair(node, node.ShallowClone(_fac));
}
public QilNode XsltCopyOf(QilNode expr)
{
return(f.XsltCopyOf(expr));
}
public QilNode XsltConvert(QilNode expr, XmlQueryType t)
{
return(f.XsltConvert(expr, t));
}
public QilNode XsltCopy(QilNode expr, QilNode content)
{
return(f.XsltCopy(expr, content));
}
//-----------------------------------------------
// XSLT
//-----------------------------------------------
public QilNode XsltGenerateId(QilNode expr)
{
return(f.XsltGenerateId(expr));
}
public QilNode XPathPreceding(QilNode expr)
{
return(f.XPathPreceding(expr));
}
//-----------------------------------------------
// Constructor
//-----------------------------------------------
/// <summary>
/// Construct a new node
/// </summary>
public QilDataSource(QilNodeType nodeType, QilNode name, QilNode baseUri) : base(nodeType, name, baseUri)
{
}
/// <summary>
/// Pop entry from substitution list.
/// </summary>
protected override void EndScope(QilNode node)
{
_subs.RemoveLastSubstitutionPair();
}
//-----------------------------------------------
// Constructor
//-----------------------------------------------
/// <summary>
/// Construct a new node
/// </summary>
public QilTargetType(QilNodeType nodeType, QilNode expr, QilNode targetType) : base(nodeType, expr, targetType)
{
}
//-----------------------------------------------
// QilCloneVisitor methods
//-----------------------------------------------
/// <summary>
/// Find the clone of an in-scope reference.
/// </summary>
protected QilNode FindClonedReference(QilNode node)
{
return(_subs.FindReplacement(node));
}
/// <summary>
/// Pop scope.
/// </summary>
protected override void EndScope(QilNode node)
{
this.scope.Remove(node);
}
//-----------------------------------------------
// Entry
//-----------------------------------------------
public QilNode Clone(QilNode node)
{
QilDepthChecker.Check(node);
// Assume that iterator nodes at the top-level are references rather than definitions
return(VisitAssumeReference(node));
}
//-----------------------------------------------
// QilVisitor overrides
//-----------------------------------------------
protected override QilNode VisitChildren(QilNode parent)
{
if (this.parents.Contains(parent))
{
// We have already visited the node that starts the infinite loop, but don't visit its children
SetError(parent, "Infinite loop");
}
else if (AddNode(parent))
{
if (parent.XmlType == null)
{
SetError(parent, "Type information missing");
}
else
{
XmlQueryType type = this.typeCheck.Check(parent);
// BUGBUG: Hack to account for Xslt compiler type fixups
if (!type.IsSubtypeOf(parent.XmlType))
{
SetError(parent, "Type information was not correctly inferred");
}
}
this.parents.Add(parent, parent);
for (int i = 0; i < parent.Count; i++)
{
if (parent[i] == null)
{
// Allow parameter name and default value to be null
if (parent.NodeType == QilNodeType.Parameter)
{
continue;
}
// Do not allow null anywhere else in the graph
else
{
SetError(parent, "Child " + i + " must not be null");
}
}
if (parent.NodeType == QilNodeType.GlobalVariableList ||
parent.NodeType == QilNodeType.GlobalParameterList ||
parent.NodeType == QilNodeType.FunctionList)
{
if (((QilReference)parent[i]).DebugName == null)
{
SetError(parent[i], "DebugName must not be null");
}
}
// If child is a reference, then call VisitReference instead of Visit in order to avoid circular visits.
if (IsReference(parent, i))
{
VisitReference(parent[i]);
}
else
{
Visit(parent[i]);
}
}
this.parents.Remove(parent);
}
return(parent);
}
public QilSortKey(QilNodeType nodeType, QilNode key, QilNode collation) : base(nodeType, key, collation)
{
}
protected override QilNode VisitFalse(QilNode n)
{
return(NoReplace(n));
}
public void AddSubstitutionPair(QilNode find, QilNode replace)
{
_s.Add(find);
_s.Add(replace);
}
/// <summary>
/// Called when a pattern has matched and after replacement code is executed.
/// </summary>
protected virtual QilNode Replace(int pattern, QilNode original, QilNode replacement)
{
replacement.SourceLine = original.SourceLine;
return(replacement);
}
public QilStrConcat(QilNodeType nodeType, QilNode delimiter, QilNode values) : base(nodeType, delimiter, values)
{
}
/// <summary>
/// Called in order to write out the xml type of a node.
/// </summary>
protected virtual void WriteXmlType(QilNode node)
{
this.writer.WriteAttributeString("xmlType", node.XmlType.ToString((this.options & Options.RoundTripTypeInfo) != 0 ? "S" : "G"));
}
//-----------------------------------------------
// Constructor
//-----------------------------------------------
/// <summary>
/// Construct an iterator
/// </summary>
public QilIterator(QilNodeType nodeType, QilNode binding) : base(nodeType)
{
Binding = binding;
}
/// <summary>
/// Clear the name annotation on this iterator or function.
/// </summary>
protected override void EndScope(QilNode node)
{
this.ngen.ClearName(node);
}
public QilNode XPathFollowing(QilNode expr)
{
return(f.XPathFollowing(expr));
}
