public QilNode Replace(QilNode expr, QilReference lookFor, QilReference replaceBy)
{
QilDepthChecker.Check(expr);
_lookFor = lookFor;
_replaceBy = replaceBy;
return VisitAssumeReference(expr);
}
//-----------------------------------------------
// QilVisitor overrides
//-----------------------------------------------
/// <summary>
/// Override certain node types in order to add additional attributes, suppress children, etc.
/// </summary>
protected override QilNode VisitChildren(QilNode node)
{
if (node is QilLiteral)
{
// If literal is not handled elsewhere, print its string value
this.writer.WriteValue(Convert.ToString(((QilLiteral)node).Value, CultureInfo.InvariantCulture));
return node;
}
else if (node is QilReference)
{
QilReference reference = (QilReference)node;
// Write the generated identifier for this iterator
this.writer.WriteAttributeString("id", _ngen.NameOf(node));
// Write the debug name of this reference (if it's defined) as a "name" attribute
if (reference.DebugName != null)
this.writer.WriteAttributeString("name", reference.DebugName.ToString());
if (node.NodeType == QilNodeType.Parameter)
{
// Don't visit parameter's name, or its default value if it is null
QilParameter param = (QilParameter)node;
if (param.DefaultValue != null)
VisitAssumeReference(param.DefaultValue);
return node;
}
}
return base.VisitChildren(node);
}
/// <summary>
/// Write references to functions or iterators like this: <RefTo id="$a"/>.
/// </summary>
protected override QilNode VisitReference(QilNode node)
{
QilReference reference = (QilReference)node;
string name = _ngen.NameOf(node);
if (name == null)
name = "OUT-OF-SCOPE REFERENCE";
this.writer.WriteStartElement("RefTo");
this.writer.WriteAttributeString("id", name);
if (reference.DebugName != null)
this.writer.WriteAttributeString("name", reference.DebugName.ToString());
this.writer.WriteEndElement();
return node;
}
public QilNode Replace(QilNode expr, QilReference lookFor, QilReference replaceBy) {
this.lookFor = lookFor;
this.replaceBy = replaceBy;
return VisitAssumeReference(expr);
}