|
1
|
|
|
""" |
|
2
|
|
|
High level functions to create nodes |
|
3
|
|
|
""" |
|
4
|
1 |
|
from opcua import ua |
|
5
|
1 |
|
from opcua.common import node |
|
6
|
|
|
from opcua.common.instantiate import instantiate |
|
7
|
|
|
|
|
8
|
1 |
|
|
|
9
|
1 |
|
def _parse_nodeid_qname(*args): |
|
10
|
1 |
|
try: |
|
11
|
1 |
|
if isinstance(args[0], int): |
|
12
|
1 |
|
nodeid = ua.NodeId(0, int(args[0])) |
|
13
|
1 |
|
qname = ua.QualifiedName(args[1], int(args[0])) |
|
14
|
1 |
|
return nodeid, qname |
|
15
|
1 |
|
if isinstance(args[0], ua.NodeId): |
|
16
|
1 |
|
nodeid = args[0] |
|
17
|
1 |
|
elif isinstance(args[0], str): |
|
18
|
|
|
nodeid = ua.NodeId.from_string(args[0]) |
|
19
|
1 |
|
else: |
|
20
|
1 |
|
raise RuntimeError() |
|
21
|
1 |
|
if isinstance(args[1], ua.QualifiedName): |
|
22
|
1 |
|
qname = args[1] |
|
23
|
1 |
|
elif isinstance(args[1], str): |
|
24
|
|
|
qname = ua.QualifiedName.from_string(args[1]) |
|
25
|
1 |
|
else: |
|
26
|
1 |
|
raise RuntimeError() |
|
27
|
1 |
|
return nodeid, qname |
|
28
|
1 |
|
except ua.UaError: |
|
29
|
1 |
|
raise |
|
30
|
1 |
|
except Exception as ex: |
|
31
|
|
|
raise TypeError("This method takes either a namespace index and a string as argument or a nodeid and a qualifiedname. Received arguments {} and got exception {}".format(args, ex)) |
|
32
|
|
|
|
|
33
|
1 |
|
|
|
34
|
|
|
def create_folder(parent, nodeid, bname): |
|
35
|
|
|
""" |
|
36
|
|
|
create a child node folder |
|
37
|
|
|
arguments are nodeid, browsename |
|
38
|
|
|
or namespace index, name |
|
39
|
1 |
|
""" |
|
40
|
1 |
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
41
|
|
|
return node.Node(parent.server, _create_object(parent.server, parent.nodeid, nodeid, qname, ua.ObjectIds.FolderType)) |
|
42
|
|
|
|
|
43
|
1 |
|
|
|
44
|
|
|
def create_object(parent, nodeid, bname, objecttype=None): |
|
45
|
|
|
""" |
|
46
|
|
|
create a child node object |
|
47
|
|
|
arguments are nodeid, browsename, [objecttype] |
|
48
|
|
|
or namespace index, name, [objecttype] |
|
49
|
1 |
|
if objectype is given (a NodeId) then the type node is instantiated inclusive its child nodes |
|
50
|
1 |
|
""" |
|
51
|
|
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
52
|
|
|
if objecttype is not None: |
|
53
|
1 |
|
objecttype = node.Node(parent.server, objecttype) |
|
54
|
|
|
return instantiate(parent, objecttype, nodeid, bname)[0] |
|
55
|
|
|
else: |
|
56
|
|
|
return node.Node(parent.server, _create_object(parent.server, parent.nodeid, nodeid, qname, ua.ObjectIds.BaseObjectType)) |
|
57
|
|
|
|
|
58
|
|
|
|
|
59
|
1 |
|
def create_property(parent, nodeid, bname, val, varianttype=None, datatype=None): |
|
60
|
1 |
|
""" |
|
61
|
1 |
|
create a child node property |
|
62
|
|
|
args are nodeid, browsename, value, [variant type] |
|
63
|
|
|
or idx, name, value, [variant type] |
|
64
|
1 |
|
""" |
|
65
|
|
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
66
|
|
|
var = ua.Variant(val, varianttype) |
|
67
|
|
|
if datatype and isinstance(datatype, int): |
|
68
|
|
|
datatype = ua.NodeId(0, datatype) |
|
69
|
|
|
if datatype and not isinstance(datatype, ua.NodeId): |
|
70
|
1 |
|
raise RuntimeError("datatyoe argument must be a nodeid or an int refering to a nodeid") |
|
71
|
1 |
|
return node.Node(parent.server, _create_variable(parent.server, parent.nodeid, nodeid, qname, var, datatype=datatype, isproperty=True)) |
|
72
|
1 |
|
|
|
73
|
|
|
|
|
74
|
|
|
def create_variable(parent, nodeid, bname, val, varianttype=None, datatype=None): |
|
75
|
1 |
|
""" |
|
76
|
|
|
create a child node variable |
|
77
|
|
|
args are nodeid, browsename, value, [variant type], [data type] |
|
78
|
|
|
or idx, name, value, [variant type], [data type] |
|
79
|
|
|
""" |
|
80
|
|
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
81
|
|
|
var = ua.Variant(val, varianttype) |
|
82
|
|
|
if datatype and isinstance(datatype, int): |
|
83
|
|
|
datatype = ua.NodeId(0, datatype) |
|
84
|
1 |
|
if datatype and not isinstance(datatype, ua.NodeId): |
|
85
|
1 |
|
raise RuntimeError("datatyoe argument must be a nodeid or an int refering to a nodeid") |
|
86
|
1 |
|
|
|
87
|
1 |
|
return node.Node(parent.server, _create_variable(parent.server, parent.nodeid, nodeid, qname, var, datatype=datatype, isproperty=False)) |
|
88
|
|
|
|
|
89
|
1 |
|
|
|
90
|
1 |
|
def create_variable_type(parent, nodeid, bname, datatype): |
|
91
|
1 |
|
""" |
|
92
|
|
|
Create a new variable type |
|
93
|
1 |
|
args are nodeid, browsename and datatype |
|
94
|
1 |
|
or idx, name and data type |
|
95
|
|
|
""" |
|
96
|
|
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
97
|
1 |
|
if datatype and not isinstance(datatype, ua.NodeId): |
|
98
|
|
|
raise RuntimeError() |
|
99
|
|
|
addnode = ua.AddNodesItem() |
|
100
|
|
|
addnode.RequestedNewNodeId = nodeid |
|
101
|
|
|
addnode.BrowseName = qname |
|
102
|
|
|
addnode.NodeClass = ua.NodeClass.Variable |
|
103
|
1 |
|
addnode.ParentNodeId = parent.nodeid |
|
104
|
1 |
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype) |
|
105
|
|
|
attrs = ua.VariableTypeAttributes() |
|
106
|
|
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
107
|
1 |
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
108
|
1 |
|
attrs.DataType = datatype |
|
109
|
1 |
|
attrs.IsAbstract = False |
|
110
|
1 |
|
attrs.WriteMask = 0 |
|
111
|
1 |
|
attrs.UserWriteMask = 0 |
|
112
|
|
|
attrs.Historizing = 0 |
|
113
|
1 |
|
attrs.AccessLevel = ua.AccessLevel.CurrentRead.mask |
|
114
|
1 |
|
attrs.UserAccessLevel = ua.AccessLevel.CurrentRead.mask |
|
115
|
1 |
|
addnode.NodeAttributes = attrs |
|
116
|
1 |
|
results = parent.server.add_nodes([addnode]) |
|
117
|
1 |
|
results[0].StatusCode.check() |
|
118
|
|
|
return results[0].AddedNodeId |
|
119
|
1 |
|
|
|
120
|
1 |
|
|
|
121
|
|
|
def create_reference_type(parent, nodeid, bname): |
|
122
|
1 |
|
""" |
|
123
|
|
|
Create a new reference type |
|
124
|
1 |
|
args are nodeid and browsename |
|
125
|
1 |
|
or idx and name |
|
126
|
1 |
|
""" |
|
127
|
1 |
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
128
|
|
|
addnode = ua.AddNodesItem() |
|
129
|
1 |
|
addnode.RequestedNewNodeId = nodeid |
|
130
|
1 |
|
addnode.BrowseName = qname |
|
131
|
1 |
|
addnode.NodeClass = ua.NodeClass.Variable |
|
132
|
1 |
|
addnode.ParentNodeId = parent.nodeid |
|
133
|
1 |
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype) |
|
134
|
1 |
|
attrs = ua.ReferenceTypeAttributes() |
|
135
|
1 |
|
attrs.IsAbstract = False |
|
136
|
1 |
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
137
|
|
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
138
|
|
|
attrs.AccessLevel = ua.AccessLevel.CurrentRead.mask |
|
139
|
1 |
|
attrs.UserAccessLevel = ua.AccessLevel.CurrentRead.mask |
|
140
|
1 |
|
addnode.NodeAttributes = attrs |
|
141
|
1 |
|
results = parent.server.add_nodes([addnode]) |
|
142
|
|
|
results[0].StatusCode.check() |
|
143
|
1 |
|
return results[0].AddedNodeId |
|
144
|
|
|
|
|
145
|
|
|
|
|
146
|
1 |
|
def create_object_type(parent, nodeid, bname): |
|
147
|
1 |
|
""" |
|
148
|
1 |
|
Create a new object type to be instanciated in address space. |
|
149
|
1 |
|
arguments are nodeid, browsename |
|
150
|
1 |
|
or namespace index, name |
|
151
|
1 |
|
""" |
|
152
|
1 |
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
153
|
1 |
|
return node.Node(parent.server, _create_object_type(parent.server, parent.nodeid, nodeid, qname)) |
|
154
|
1 |
|
|
|
155
|
|
|
|
|
156
|
1 |
|
def create_method(parent, *args): |
|
157
|
1 |
|
""" |
|
158
|
1 |
|
create a child method object |
|
159
|
1 |
|
This is only possible on server side!! |
|
160
|
1 |
|
args are nodeid, browsename, method_to_be_called, [input argument types], [output argument types] |
|
161
|
1 |
|
or idx, name, method_to_be_called, [input argument types], [output argument types] |
|
162
|
1 |
|
if argument types is specified, child nodes advertising what arguments the method uses and returns will be created |
|
163
|
1 |
|
a callback is a method accepting the nodeid of the parent as first argument and variants after. returns a list of variants |
|
164
|
|
|
""" |
|
165
|
|
|
nodeid, qname = _parse_nodeid_qname(*args[:2]) |
|
166
|
1 |
|
callback = args[2] |
|
167
|
|
|
if len(args) > 3: |
|
168
|
1 |
|
inputs = args[3] |
|
169
|
1 |
|
else: |
|
170
|
1 |
|
inputs = [] |
|
171
|
1 |
|
if len(args) > 4: |
|
172
|
1 |
|
outputs = args[4] |
|
173
|
1 |
|
else: |
|
174
|
1 |
|
outputs = [] |
|
175
|
1 |
|
return node.Node(parent.server, _create_method(parent, nodeid, qname, callback, inputs, outputs)) |
|
176
|
1 |
|
|
|
177
|
|
|
|
|
178
|
|
|
def _create_object(server, parentnodeid, nodeid, qname, objecttype): |
|
179
|
1 |
|
addnode = ua.AddNodesItem() |
|
180
|
1 |
|
addnode.RequestedNewNodeId = nodeid |
|
181
|
1 |
|
addnode.BrowseName = qname |
|
182
|
1 |
|
addnode.ParentNodeId = parentnodeid |
|
183
|
1 |
|
if node.Node(server, parentnodeid).get_type_definition() == ua.NodeId(ua.ObjectIds.FolderType): |
|
184
|
1 |
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes) |
|
185
|
1 |
|
else: |
|
186
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasComponent) |
|
187
|
1 |
|
addnode.NodeClass = ua.NodeClass.Object |
|
188
|
1 |
|
if isinstance(objecttype, int): |
|
189
|
1 |
|
addnode.TypeDefinition = ua.NodeId(objecttype) |
|
190
|
1 |
|
elif isinstance(objecttype, ua.NodeId): |
|
191
|
1 |
|
addnode.TypeDefinition = objecttype |
|
192
|
1 |
|
attrs = ua.ObjectAttributes() |
|
193
|
1 |
|
attrs.EventNotifier = 0 |
|
194
|
1 |
|
|
|
195
|
1 |
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
196
|
1 |
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
197
|
1 |
|
attrs.WriteMask = 0 |
|
198
|
1 |
|
attrs.UserWriteMask = 0 |
|
199
|
1 |
|
addnode.NodeAttributes = attrs |
|
200
|
1 |
|
results = server.add_nodes([addnode]) |
|
201
|
1 |
|
results[0].StatusCode.check() |
|
202
|
1 |
|
return results[0].AddedNodeId |
|
203
|
1 |
|
|
|
204
|
|
|
|
|
205
|
|
|
def _create_object_type(server, parentnodeid, nodeid, qname): |
|
206
|
1 |
|
addnode = ua.AddNodesItem() |
|
207
|
1 |
|
addnode.RequestedNewNodeId = nodeid |
|
208
|
|
|
addnode.BrowseName = qname |
|
209
|
|
|
addnode.ParentNodeId = parentnodeid |
|
210
|
1 |
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype) |
|
211
|
1 |
|
addnode.NodeClass = ua.NodeClass.ObjectType |
|
212
|
1 |
|
attrs = ua.ObjectTypeAttributes() |
|
213
|
1 |
|
attrs.IsAbstract = False |
|
214
|
|
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
215
|
|
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
216
|
1 |
|
attrs.WriteMask = 0 |
|
217
|
1 |
|
attrs.UserWriteMask = 0 |
|
218
|
1 |
|
addnode.NodeAttributes = attrs |
|
219
|
|
|
results = server.add_nodes([addnode]) |
|
220
|
1 |
|
results[0].StatusCode.check() |
|
221
|
1 |
|
return results[0].AddedNodeId |
|
222
|
|
|
|
|
223
|
1 |
|
|
|
224
|
|
|
def _create_variable(server, parentnodeid, nodeid, qname, var, datatype=None, isproperty=False): |
|
225
|
|
|
addnode = ua.AddNodesItem() |
|
226
|
1 |
|
addnode.RequestedNewNodeId = nodeid |
|
227
|
1 |
|
addnode.BrowseName = qname |
|
228
|
|
|
addnode.NodeClass = ua.NodeClass.Variable |
|
229
|
1 |
|
addnode.ParentNodeId = parentnodeid |
|
230
|
|
|
if isproperty: |
|
231
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasProperty) |
|
232
|
1 |
|
addnode.TypeDefinition = ua.NodeId(ua.ObjectIds.PropertyType) |
|
233
|
|
|
else: |
|
234
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasComponent) |
|
235
|
|
|
addnode.TypeDefinition = ua.NodeId(ua.ObjectIds.BaseDataVariableType) |
|
236
|
|
|
attrs = ua.VariableAttributes() |
|
237
|
1 |
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
238
|
1 |
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
239
|
1 |
|
if datatype: |
|
240
|
1 |
|
attrs.DataType = datatype |
|
241
|
1 |
|
else: |
|
242
|
1 |
|
attrs.DataType = _guess_datatype(var) |
|
243
|
1 |
|
|
|
244
|
1 |
|
attrs.Value = var |
|
245
|
1 |
|
if isinstance(var, list) or isinstance(var, tuple): |
|
246
|
|
|
attrs.ValueRank = ua.ValueRank.OneDimension |
|
247
|
|
|
else: |
|
248
|
1 |
|
attrs.ValueRank = ua.ValueRank.Scalar |
|
249
|
1 |
|
#attrs.ArrayDimensions = None |
|
250
|
1 |
|
attrs.WriteMask = 0 |
|
251
|
1 |
|
attrs.UserWriteMask = 0 |
|
252
|
1 |
|
attrs.Historizing = 0 |
|
253
|
|
|
attrs.AccessLevel = ua.AccessLevel.CurrentRead.mask |
|
254
|
|
|
attrs.UserAccessLevel = ua.AccessLevel.CurrentRead.mask |
|
255
|
|
|
addnode.NodeAttributes = attrs |
|
256
|
|
|
results = server.add_nodes([addnode]) |
|
257
|
|
|
results[0].StatusCode.check() |
|
258
|
|
|
return results[0].AddedNodeId |
|
259
|
|
|
|
|
260
|
|
|
|
|
261
|
|
|
def _create_variable_type(server, parentnodeid, nodeid, qname, datatype, value=None): |
|
262
|
|
|
addnode = ua.AddNodesItem() |
|
263
|
|
|
addnode.RequestedNewNodeId = nodeid |
|
264
|
|
|
addnode.BrowseName = qname |
|
265
|
|
|
addnode.NodeClass = ua.NodeClass.VariableType |
|
266
|
|
|
addnode.ParentNodeId = parentnodeid |
|
267
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype) |
|
268
|
|
|
#addnode.TypeDefinition = ua.NodeId(ua.ObjectIds.BaseDataVariableType) |
|
269
|
|
|
attrs = ua.VariableTypeAttributes() |
|
270
|
|
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
271
|
|
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
272
|
|
|
attrs.DataType = datatype |
|
273
|
|
|
if value: |
|
274
|
|
|
attrs.Value = value |
|
275
|
|
|
if isinstance(value, (list, tuple)): |
|
276
|
|
|
attrs.ValueRank = ua.ValueRank.OneDimension |
|
277
|
|
|
else: |
|
278
|
|
|
attrs.ValueRank = ua.ValueRank.Scalar |
|
279
|
|
|
#attrs.ArrayDimensions = None |
|
280
|
|
|
attrs.WriteMask = 0 |
|
281
|
|
|
attrs.UserWriteMask = 0 |
|
282
|
|
|
attrs.Historizing = 0 |
|
283
|
|
|
attrs.AccessLevel = ua.AccessLevel.CurrentRead.mask |
|
284
|
|
|
attrs.UserAccessLevel = ua.AccessLevel.CurrentRead.mask |
|
285
|
|
|
addnode.NodeAttributes = attrs |
|
286
|
|
|
results = server.add_nodes([addnode]) |
|
287
|
|
|
results[0].StatusCode.check() |
|
288
|
|
|
return results[0].AddedNodeId |
|
289
|
|
|
|
|
290
|
|
|
|
|
291
|
|
|
def create_data_type(parent, nodeid, bname, description=None): |
|
292
|
|
|
""" |
|
293
|
|
|
Create a new data type to be used in new variables, etc .. |
|
294
|
|
|
arguments are nodeid, browsename |
|
295
|
|
|
or namespace index, name |
|
296
|
|
|
""" |
|
297
|
|
|
nodeid, qname = _parse_nodeid_qname(nodeid, bname) |
|
298
|
|
|
|
|
299
|
|
|
addnode = ua.AddNodesItem() |
|
300
|
|
|
addnode.RequestedNewNodeId = nodeid |
|
301
|
|
|
addnode.BrowseName = qname |
|
302
|
|
|
addnode.NodeClass = ua.NodeClass.DataType |
|
303
|
|
|
addnode.ParentNodeId = parent.nodeid |
|
304
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype) |
|
305
|
|
|
#addnode.TypeDefinition = ua.NodeId(ua.ObjectIds.BaseDataVariableType) # No type definition for types |
|
306
|
|
|
attrs = ua.DataTypeAttributes() |
|
307
|
|
|
if description is None: |
|
308
|
|
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
309
|
|
|
else: |
|
310
|
|
|
attrs.Description = ua.LocalizedText(description) |
|
311
|
|
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
312
|
|
|
attrs.WriteMask = 0 |
|
313
|
|
|
attrs.UserWriteMask = 0 |
|
314
|
|
|
attrs.IsAbstract = False # True mean they cannot be instanciated |
|
315
|
|
|
addnode.NodeAttributes = attrs |
|
316
|
|
|
results = parent.server.add_nodes([addnode]) |
|
317
|
|
|
results[0].StatusCode.check() |
|
318
|
|
|
return node.Node(parent.server, results[0].AddedNodeId) |
|
319
|
|
|
|
|
320
|
|
|
|
|
321
|
|
|
def _create_method(parent, nodeid, qname, callback, inputs, outputs): |
|
322
|
|
|
addnode = ua.AddNodesItem() |
|
323
|
|
|
addnode.RequestedNewNodeId = nodeid |
|
324
|
|
|
addnode.BrowseName = qname |
|
325
|
|
|
addnode.NodeClass = ua.NodeClass.Method |
|
326
|
|
|
addnode.ParentNodeId = parent.nodeid |
|
327
|
|
|
addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasComponent) |
|
328
|
|
|
#node.TypeDefinition = ua.NodeId(ua.ObjectIds.BaseObjectType) |
|
329
|
|
|
attrs = ua.MethodAttributes() |
|
330
|
|
|
attrs.Description = ua.LocalizedText(qname.Name) |
|
331
|
|
|
attrs.DisplayName = ua.LocalizedText(qname.Name) |
|
332
|
|
|
attrs.WriteMask = 0 |
|
333
|
|
|
attrs.UserWriteMask = 0 |
|
334
|
|
|
attrs.Executable = True |
|
335
|
|
|
attrs.UserExecutable = True |
|
336
|
|
|
addnode.NodeAttributes = attrs |
|
337
|
|
|
results = parent.server.add_nodes([addnode]) |
|
338
|
|
|
results[0].StatusCode.check() |
|
339
|
|
|
method = node.Node(parent.server, results[0].AddedNodeId) |
|
340
|
|
|
create_property(method, |
|
341
|
|
|
ua.NodeId(), |
|
342
|
|
|
ua.QualifiedName("InputArguments", 0), |
|
343
|
|
|
[_vtype_to_argument(vtype) for vtype in inputs], |
|
344
|
|
|
varianttype=ua.VariantType.ExtensionObject, |
|
345
|
|
|
datatype=ua.ObjectIds.Argument) |
|
346
|
|
|
create_property(method, |
|
347
|
|
|
ua.NodeId(), |
|
348
|
|
|
ua.QualifiedName("OutputArguments", 0), |
|
349
|
|
|
[_vtype_to_argument(vtype) for vtype in outputs], |
|
350
|
|
|
varianttype=ua.VariantType.ExtensionObject, |
|
351
|
|
|
datatype=ua.ObjectIds.Argument) |
|
352
|
|
|
parent.server.add_method_callback(method.nodeid, callback) |
|
353
|
|
|
return results[0].AddedNodeId |
|
354
|
|
|
|
|
355
|
|
|
|
|
356
|
|
|
def _vtype_to_argument(vtype): |
|
357
|
|
|
if isinstance(vtype, ua.Argument): |
|
358
|
|
|
return vtype |
|
359
|
|
|
|
|
360
|
|
|
arg = ua.Argument() |
|
361
|
|
|
v = ua.Variant(None, vtype) |
|
362
|
|
|
arg.DataType = _guess_datatype(v) |
|
363
|
|
|
return arg |
|
364
|
|
|
|
|
365
|
|
|
|
|
366
|
|
|
def _guess_datatype(variant): |
|
367
|
|
|
if variant.VariantType == ua.VariantType.ExtensionObject: |
|
368
|
|
|
if variant.Value is None: |
|
369
|
|
|
raise ua.UaError("Cannot guess DataType from Null ExtensionObject") |
|
370
|
|
|
if type(variant.Value) in (list, tuple): |
|
371
|
|
|
if len(variant.Value) == 0: |
|
372
|
|
|
raise ua.UaError("Cannot guess DataType from Null ExtensionObject") |
|
373
|
|
|
extobj = variant.Value[0] |
|
374
|
|
|
else: |
|
375
|
|
|
extobj = variant.Value |
|
376
|
|
|
classname = extobj.__class__.__name__ |
|
377
|
|
|
return ua.NodeId(getattr(ua.ObjectIds, classname)) |
|
378
|
|
|
else: |
|
379
|
|
|
return ua.NodeId(getattr(ua.ObjectIds, variant.VariantType.name)) |
|
380
|
|
|
|
|
381
|
|
|
|
|
382
|
|
|
def delete_nodes(server, nodes, recursive=False): |
|
383
|
|
|
""" |
|
384
|
|
|
Delete specified nodes. Optionally delete recursively all nodes with a |
|
385
|
|
|
downward hierachic references to the node |
|
386
|
|
|
""" |
|
387
|
|
|
nodestodelete = [] |
|
388
|
|
|
if recursive: |
|
389
|
|
|
nodes += _add_childs(nodes) |
|
390
|
|
|
for mynode in nodes: |
|
391
|
|
|
it = ua.DeleteNodesItem() |
|
392
|
|
|
it.NodeId = mynode.nodeid |
|
393
|
|
|
it.DeleteTargetReferences = True |
|
394
|
|
|
nodestodelete.append(it) |
|
395
|
|
|
params = ua.DeleteNodesParameters() |
|
396
|
|
|
params.NodesToDelete = nodestodelete |
|
397
|
|
|
return server.delete_nodes(params) |
|
398
|
|
|
|
|
399
|
|
|
|
|
400
|
|
|
def _add_childs(nodes): |
|
401
|
|
|
results = [] |
|
402
|
|
|
for mynode in nodes[:]: |
|
403
|
|
|
results += mynode.get_children() |
|
404
|
|
|
return results |
|
405
|
|
|
|
|
406
|
|
|
|
|
407
|
|
|
|
FreeOpcUa /
python-opcua
