public static void EnumNodes(Expression root, EnumNodesCallBack callback, EnumNodesCallBack postCallback, params object[] args)
{
switch( root.NodeType )
{
case NodeType.Literal:
case NodeType.Parameter:
case NodeType.Context:
{
if( callback != null )
{
callback(root, args);
}
if( postCallback != null )
{
postCallback(root, args);
}
return;
}
case NodeType.Binary:
{
if( callback == null || callback(root, args) )
{
Binary node = (Binary)root;
Expression.EnumNodes(node.Left, callback, postCallback, args);
Expression.EnumNodes(node.Right, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Unary:
{
if( callback == null || callback(root, args) )
{
Unary node = (Unary)root;
Expression.EnumNodes(node.Operand, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Axis:
case NodeType.Filter:
{
if( callback == null || callback(root, args) )
{
Filter node = (Filter)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
Expression.EnumNodes(node.Constraint, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Property:
{
if( callback == null || callback(root, args) )
{
Property node = (Property)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Parent:
{
if( callback == null || callback(root, args) )
{
Parent node = (Parent)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Function:
{
if( callback == null || callback(root, args) )
{
Function node = (Function)root;
for( int i = 0; i < node.Params.Length; i++ )
{
Expression.EnumNodes(node.Params[i], callback, postCallback, args);
}
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.TypeFilter:
{
if( callback == null || callback(root, args) )
{
TypeFilter node = (TypeFilter)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
case NodeType.Empty:
{
return;
}
case NodeType.OrderBy:
{
if( callback == null || callback(root, args) )
{
OrderBy node = (OrderBy)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if( postCallback != null )
{
postCallback(root, args);
}
}
return;
}
default:
{
throw new NotSupportedException("Expression type '" + root.GetType() + "' is not currently supported.");
}
}
}
public static void EnumNodes(Expression root, EnumNodesCallBack callback, EnumNodesCallBack postCallback, params object[] args)
{
switch (root.NodeType)
{
case NodeType.Literal:
case NodeType.Parameter:
case NodeType.Context:
{
if (callback != null)
{
callback(root, args);
}
if (postCallback != null)
{
postCallback(root, args);
}
return;
}
case NodeType.Binary:
{
if (callback == null || callback(root, args))
{
Binary node = (Binary)root;
Expression.EnumNodes(node.Left, callback, postCallback, args);
Expression.EnumNodes(node.Right, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Unary:
{
if (callback == null || callback(root, args))
{
Unary node = (Unary)root;
Expression.EnumNodes(node.Operand, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Axis:
case NodeType.Filter:
{
if (callback == null || callback(root, args))
{
Filter node = (Filter)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
Expression.EnumNodes(node.Constraint, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Property:
{
if (callback == null || callback(root, args))
{
Property node = (Property)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Parent:
{
if (callback == null || callback(root, args))
{
Parent node = (Parent)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Function:
{
if (callback == null || callback(root, args))
{
Function node = (Function)root;
for (int i = 0; i < node.Params.Length; i++)
{
Expression.EnumNodes(node.Params[i], callback, postCallback, args);
}
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.TypeFilter:
{
if (callback == null || callback(root, args))
{
TypeFilter node = (TypeFilter)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
case NodeType.Empty:
{
return;
}
case NodeType.OrderBy:
{
if (callback == null || callback(root, args))
{
OrderBy node = (OrderBy)root;
Expression.EnumNodes(node.Source, callback, postCallback, args);
if (postCallback != null)
{
postCallback(root, args);
}
}
return;
}
default:
{
throw new NotSupportedException("Expression type '" + root.GetType() + "' is not currently supported.");
}
}
}
public static void EnumNodes(Expression root, EnumNodesCallBack callback)
{
EnumNodes(root, callback, null, null);
}
public static void EnumNodes(Expression root, EnumNodesCallBack callback)
{
EnumNodes(root, callback, null, null);
}
