it's better to use a filter method here

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@448 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/node.py

@@ -162,8 +162,7 @@ class NodeManager(object):
     def getNodeByUUID(self, uuid):
         return self.uuid_dict.get(uuid)
     
-    def clear(self, exclude_node_type=None):
+    def clear(self, filter=None):
         for node in self.getNodeList():
-            if exclude_node_type is not None and \
-                   node.getNodeType() != exclude_node_type:
+            if filter is not None and filter(node):
                 self.remove(node)