CVS: Products/ParsedXML/NodePath - NodePath.py:1.3

Update of /cvs-repository/Products/ParsedXML/NodePath
In directory cvs.zope.org:/tmp/cvs-serv9037

Modified Files:
	NodePath.py 
Log Message:
Allow empty nodepaths.


=== Products/ParsedXML/NodePath/NodePath.py 1.2 => 1.3 ===
         """Resolve path.
         """
+        if not path:
+            return top_node
         steps = string.split(path, ',')
         # get scheme as first element of path
         scheme_name, steps = steps[0], steps[1:]
@@ -33,15 +35,15 @@
     def create_steps(self, top_node, node, scheme_name):
         """Construct steps tuple to node.
         """
-        scheme = self._schemes[scheme_name]
-        steps = [scheme_name]
-        steps.extend(scheme.create_steps(top_node, node))
-        return steps
+        return self._schemes[scheme_name].create_steps(top_node, node)
     
     def create_path(self, top_node, node, scheme_name):
         """Construct path to node according to scheme_name.
         """
-        return string.join(self.create_steps(top_node, node, scheme_name), ',')
+        steps = self.create_steps(top_node, node, scheme_name)
+        if not steps:
+            return '' 
+        return '%s,%s' % (scheme_name, string.join(steps, ','))
 
 class BaseNodePathScheme:
     def __init__(self, scheme_name):