|
1
|
|
|
from opcua import ua |
|
2
|
|
|
from opcua import Node |
|
3
|
|
|
|
|
4
|
|
|
|
|
5
|
|
|
def copy_node(parent, node, nodeid=None, idx=0, recursive=True): |
|
6
|
|
|
""" |
|
7
|
|
|
Copy a node or node tree as child of parent node |
|
8
|
|
|
""" |
|
9
|
|
|
print("Copying", node, "into ", parent, "in idx", idx) |
|
10
|
|
|
rdesc = _rdesc_from_node(parent, node) |
|
11
|
|
|
|
|
12
|
|
|
if nodeid is None: |
|
13
|
|
|
nodeid = ua.NodeId(namespaceidx=idx) # will trigger automatic node generation in namespace idx |
|
14
|
|
|
added_nodeids = _copy_node(parent.server, parent.nodeid, rdesc, nodeid, recursive) |
|
15
|
|
|
return [Node(parent.server, nid) for nid in added_nodeids] |
|
16
|
|
|
|
|
17
|
|
|
|
|
18
|
|
|
def _copy_node(server, parent_nodeid, rdesc, nodeid, recursive): |
|
19
|
|
|
addnode = ua.AddNodesItem() |
|
20
|
|
|
addnode.RequestedNewNodeId = nodeid |
|
21
|
|
|
addnode.BrowseName = rdesc.BrowseName |
|
22
|
|
|
addnode.ParentNodeId = parent_nodeid |
|
23
|
|
|
addnode.ReferenceTypeId = rdesc.ReferenceTypeId |
|
24
|
|
|
addnode.TypeDefinition = rdesc.TypeDefinition |
|
25
|
|
|
addnode.NodeClass = rdesc.NodeClass |
|
26
|
|
|
|
|
27
|
|
|
node_type = Node(server, rdesc.NodeId) |
|
28
|
|
|
|
|
29
|
|
|
attrObj = getattr(ua, rdesc.NodeClass.name + "Attributes") |
|
30
|
|
|
print("attrObj" is attrObj) |
|
31
|
|
|
_read_and_copy_attrs(node_type, attrObj(), addnode) |
|
32
|
|
|
|
|
33
|
|
|
res = server.add_nodes([addnode])[0] |
|
34
|
|
|
print("Added result", res) |
|
35
|
|
|
|
|
36
|
|
|
added_nodes = [res.AddedNodeId] |
|
37
|
|
|
|
|
38
|
|
|
if recursive: |
|
39
|
|
|
descs = node_type.get_children_descriptions() |
|
40
|
|
|
for desc in descs: |
|
41
|
|
|
nodes = _copy_node(server, res.AddedNodeId, desc, nodeid=ua.NodeId(namespaceidx=res.AddedNodeId.NamespaceIndex), recursive=recursive) |
|
42
|
|
|
added_nodes.extend(nodes) |
|
43
|
|
|
|
|
44
|
|
|
return added_nodes |
|
45
|
|
|
|
|
46
|
|
|
|
|
47
|
|
|
def _rdesc_from_node(parent, node): |
|
48
|
|
|
results = node.get_attributes([ua.AttributeIds.NodeClass, ua.AttributeIds.BrowseName, ua.AttributeIds.DisplayName]) |
|
49
|
|
|
nclass, qname, dname = [res.Value.Value for res in results] |
|
50
|
|
|
|
|
51
|
|
|
rdesc = ua.ReferenceDescription() |
|
52
|
|
|
rdesc.NodeId = node.nodeid |
|
53
|
|
|
rdesc.BrowseName = qname |
|
54
|
|
|
rdesc.DisplayName = dname |
|
55
|
|
|
rdesc.NodeClass = nclass |
|
56
|
|
|
if parent.get_type_definition() == ua.NodeId(ua.ObjectIds.FolderType): |
|
57
|
|
|
rdesc.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes) |
|
58
|
|
|
else: |
|
59
|
|
|
rdesc.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasComponent) |
|
60
|
|
|
rdesc.TypeDefinition = node.nodeid |
|
61
|
|
|
return rdesc |
|
62
|
|
|
|
|
63
|
|
|
|
|
64
|
|
|
|
|
65
|
|
|
def _read_and_copy_attrs(node_type, struct, addnode): |
|
66
|
|
|
names = [name for name in struct.__dict__.keys() if not name.startswith("_") and name not in ("BodyLength", "TypeId", "SpecifiedAttributes", "Encoding", "IsAbstract", "EventNotifier")] |
|
67
|
|
|
attrs = [getattr(ua.AttributeIds, name) for name in names] |
|
68
|
|
|
for name in names: |
|
69
|
|
|
results = node_type.get_attributes(attrs) |
|
70
|
|
|
for idx, name in enumerate(names): |
|
71
|
|
|
if results[idx].StatusCode.is_good(): |
|
72
|
|
|
if name == "Value": |
|
73
|
|
|
setattr(struct, name, results[idx].Value) |
|
74
|
|
|
else: |
|
75
|
|
|
setattr(struct, name, results[idx].Value.Value) |
|
76
|
|
|
else: |
|
77
|
|
|
print("Instantiate: while copying attributes from node type %s, attribute %s, statuscode is %s" % (node_type, name, results[idx].StatusCode)) |
|
78
|
|
|
addnode.NodeAttributes = struct |
|
79
|
|
|
|
FreeOpcUa /
python-opcua
