use BrowseResultMask

asyncua/common/events.py

@@ -8,6 +8,9 @@ if TYPE_CHECKING:
     from asyncua.common.node import Node
 
 
+_BROWSE_MASK =  ua.BrowseResultMask.NodeClass |  ua.BrowseResultMask.ReferenceTypeId |  ua.BrowseResultMask.BrowseName
+
+
 class Event:
     """
     OPC UA Event object.
@@ -161,12 +164,12 @@ async def _select_clause_from_childs(child: "Node", refs: List[ua.ReferenceDescr
                 await _append_new_attribute_to_select_clauses(select_clauses, already_selected, [*browse_path] + [ref.BrowseName])
             else:
                 await _append_new_attribute_to_select_clauses(select_clauses, already_selected, [*browse_path] + [ref.BrowseName])
-                var = child.init_child_node(ref.NodeId)
-                refs = await var.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True)
+                var = child.new_node(child.server, ref.NodeId)
+                refs = await var.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True, _BROWSE_MASK)
                 await _select_clause_from_childs(var, refs, select_clauses, already_selected, browse_path + [ref.BrowseName])
         elif ref.NodeClass == ua.NodeClass.Object:
-            obj = child.init_child_node(ref.NodeId)
-            refs = await obj.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True)
+            obj = child.new_node(child.server, ref.NodeId)
+            refs = await obj.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True, _BROWSE_MASK)
             await _select_clause_from_childs(obj, refs, select_clauses, already_selected, browse_path + [ref.BrowseName])
 
 
@@ -174,7 +177,7 @@ async def select_clauses_from_evtype(evtypes: List["Node"]):
     select_clauses = []
     already_selected = {}
     for evtype in evtypes:
-        refs = await select_event_attributes_from_type_node(evtype, lambda n: n.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True))
+        refs = await select_event_attributes_from_type_node(evtype, lambda n: n.get_references(ua.ObjectIds.Aggregates, ua.BrowseDirection.Forward, ua.NodeClass.Object | ua.NodeClass.Variable, True, _BROWSE_MASK))
         if refs:
             await _select_clause_from_childs(evtype, refs, select_clauses, already_selected, [])
     return select_clauses

asyncua/common/node.py

@@ -369,8 +369,8 @@ class Node:
         """
         return self.get_children(refs=ua.ObjectIds.HasComponent, nodeclassmask=ua.NodeClass.Method)
 
-    async def get_children_descriptions(self, refs=ua.ObjectIds.HierarchicalReferences, nodeclassmask=ua.NodeClass.Unspecified, includesubtypes=True):
-        return await self.get_references(refs, ua.BrowseDirection.Forward, nodeclassmask, includesubtypes)
+    async def get_children_descriptions(self, refs=ua.ObjectIds.HierarchicalReferences, nodeclassmask=ua.NodeClass.Unspecified, includesubtypes=True, result_mask=ua.BrowseResultMask.All):
+        return await self.get_references(refs, ua.BrowseDirection.Forward, nodeclassmask, includesubtypes, result_mask)
 
     def get_encoding_refs(self):
         return self.get_referenced_nodes(ua.ObjectIds.HasEncoding, ua.BrowseDirection.Forward)
@@ -378,7 +378,7 @@ class Node:
     def get_description_refs(self):
         return self.get_referenced_nodes(ua.ObjectIds.HasDescription, ua.BrowseDirection.Forward)
 
-    async def get_references(self, refs=ua.ObjectIds.References, direction=ua.BrowseDirection.Both, nodeclassmask=ua.NodeClass.Unspecified, includesubtypes=True):
+    async def get_references(self, refs=ua.ObjectIds.References, direction=ua.BrowseDirection.Both, nodeclassmask=ua.NodeClass.Unspecified, includesubtypes=True, result_mask=ua.BrowseResultMask.All):
         """
         returns references of the node based on specific filter defined with:
 
@@ -386,13 +386,14 @@ class Node:
         direction = Browse direction for references
         nodeclassmask = filter nodes based on specific class
         includesubtypes = If true subtypes of the reference (ref) are also included
+        result_mask = define what results information are requested
         """
         desc = ua.BrowseDescription()
         desc.BrowseDirection = direction
         desc.ReferenceTypeId = _to_nodeid(refs)
         desc.IncludeSubtypes = includesubtypes
         desc.NodeClassMask = nodeclassmask
-        desc.ResultMask = ua.BrowseResultMask.All
+        desc.ResultMask = result_mask
         desc.NodeId = self.nodeid
         params = ua.BrowseParameters()
         params.View.Timestamp = ua.get_win_epoch()
@@ -726,8 +727,9 @@ class Node:
         self.nodeid = self.basenodeid
         self.basenodeid = None
 
-    def init_child_node(self, nodeid: ua.NodeId):
+    @staticmethod
+    def new_node(server, nodeid: ua.NodeId):
         """
         Helper function to init nodes with out importing Node
         """
-        return Node(self.server, nodeid)
+        return Node(server, nodeid)