FreeOpcUa /
python-opcua
| Total Complexity | 107 |
| Total Lines | 390 |
| Duplicated Lines | 18.72 % |
| Coverage | 82.51% |
| Changes | 4 | ||
| Bugs | 1 | Features | 0 |
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like XmlImporter often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | """ |
||
| 14 | 1 | class XmlImporter(object): |
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| 15 | |||
| 16 | 1 | def __init__(self, server): |
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| 17 | 1 | self.logger = logging.getLogger(__name__) |
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| 18 | 1 | self.parser = None |
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| 19 | 1 | self.server = server |
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| 20 | 1 | self.namespaces = {} |
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| 21 | 1 | self.aliases = {} |
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| 22 | |||
| 23 | 1 | def _map_namespaces(self, namespaces_uris): |
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| 24 | """ |
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| 25 | creates a mapping between the namespaces in the xml file and in the server. |
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| 26 | if not present the namespace is registered. |
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| 27 | """ |
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| 28 | 1 | namespaces = {} |
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| 29 | 1 | for ns_index, ns_uri in enumerate(namespaces_uris): |
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| 30 | 1 | ns_server_index = self.server.register_namespace(ns_uri) |
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| 31 | 1 | namespaces[ns_index + 1] = ns_server_index |
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| 32 | 1 | return namespaces |
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| 33 | |||
| 34 | 1 | def _map_aliases(self, aliases): |
|
| 35 | """ |
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| 36 | maps the import aliases to the correct namespaces |
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| 37 | """ |
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| 38 | 1 | aliases_mapped = {} |
|
| 39 | 1 | for alias, node_id in aliases.items(): |
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| 40 | 1 | aliases_mapped[alias] = self._migrate_ns(self.to_nodeid(node_id)) |
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| 41 | 1 | return aliases_mapped |
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| 42 | |||
| 43 | 1 | def import_xml(self, xmlpath): |
|
| 44 | """ |
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| 45 | import xml and return added nodes |
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| 46 | """ |
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| 47 | 1 | self.logger.info("Importing XML file %s", xmlpath) |
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| 48 | 1 | self.parser = xmlparser.XMLParser(xmlpath) |
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| 49 | |||
| 50 | 1 | dnodes = self.parser.get_node_datas() |
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| 51 | 1 | dnodes = self.make_objects(dnodes) |
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| 52 | |||
| 53 | 1 | self.namespaces = self._map_namespaces(self.parser.get_used_namespaces()) |
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| 54 | 1 | self.aliases = self._map_aliases(self.parser.get_aliases()) |
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| 55 | |||
| 56 | 1 | nodes_parsed = self._sort_nodes_by_parentid(dnodes) |
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| 57 | |||
| 58 | 1 | nodes = [] |
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| 59 | 1 | for nodedata in nodes_parsed: # self.parser: |
|
| 60 | 1 | if nodedata.nodetype == 'UAObject': |
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| 61 | 1 | node = self.add_object(nodedata) |
|
| 62 | 1 | elif nodedata.nodetype == 'UAObjectType': |
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| 63 | 1 | node = self.add_object_type(nodedata) |
|
| 64 | 1 | elif nodedata.nodetype == 'UAVariable': |
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| 65 | 1 | node = self.add_variable(nodedata) |
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| 66 | 1 | elif nodedata.nodetype == 'UAVariableType': |
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| 67 | node = self.add_variable_type(nodedata) |
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| 68 | 1 | elif nodedata.nodetype == 'UAReferenceType': |
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| 69 | node = self.add_reference_type(nodedata) |
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| 70 | 1 | elif nodedata.nodetype == 'UADataType': |
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| 71 | 1 | node = self.add_datatype(nodedata) |
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| 72 | 1 | elif nodedata.nodetype == 'UAMethod': |
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| 73 | 1 | node = self.add_method(nodedata) |
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| 74 | else: |
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| 75 | self.logger.warning("Not implemented node type: %s ", nodedata.nodetype) |
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| 76 | continue |
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| 77 | 1 | nodes.append(node) |
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| 78 | 1 | return nodes |
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| 79 | |||
| 80 | 1 | def _add_node(self, node): |
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| 81 | 1 | if isinstance(self.server, opcua.server.server.Server): |
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| 82 | 1 | return self.server.iserver.isession.add_nodes([node]) |
|
| 83 | else: |
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| 84 | 1 | return self.server.uaclient.add_nodes([node]) |
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| 85 | |||
| 86 | 1 | def _add_references(self, refs): |
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| 87 | 1 | if isinstance(self.server, opcua.server.server.Server): |
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| 88 | 1 | return self.server.iserver.isession.add_references(refs) |
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| 89 | else: |
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| 90 | 1 | return self.server.uaclient.add_references(refs) |
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| 91 | |||
| 92 | 1 | def make_objects(self, node_datas): |
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| 93 | 1 | new_nodes = [] |
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| 94 | 1 | for ndata in node_datas: |
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| 95 | 1 | ndata.nodeid = ua.NodeId.from_string(ndata.nodeid) |
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| 96 | 1 | ndata.browsename = ua.QualifiedName.from_string(ndata.browsename) |
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| 97 | 1 | if ndata.parent: |
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| 98 | 1 | ndata.parent = ua.NodeId.from_string(ndata.parent) |
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| 99 | 1 | if ndata.parentlink: |
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| 100 | 1 | ndata.parentlink = self.to_nodeid(ndata.parentlink) |
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| 101 | 1 | if ndata.typedef: |
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| 102 | 1 | ndata.typedef = self.to_nodeid(ndata.typedef) |
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| 103 | 1 | new_nodes.append(ndata) |
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| 104 | 1 | return new_nodes |
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| 105 | |||
| 106 | 1 | def _migrate_ns(self, nodeid): |
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| 107 | """ |
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| 108 | Check if the index of nodeid or browsename given in the xml model file |
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| 109 | must be converted to a already existing namespace id based on the files |
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| 110 | namespace uri |
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| 111 | |||
| 112 | :returns: NodeId (str) |
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| 113 | """ |
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| 114 | 1 | if nodeid.NamespaceIndex in self.namespaces: |
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| 115 | 1 | nodeid = copy(nodeid) |
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| 116 | 1 | nodeid.NamespaceIndex = self.namespaces[nodeid.NamespaceIndex] |
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| 117 | 1 | return nodeid |
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| 118 | |||
| 119 | 1 | def _get_node(self, obj): |
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| 120 | 1 | node = ua.AddNodesItem() |
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| 121 | 1 | node.RequestedNewNodeId = self._migrate_ns(obj.nodeid) |
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| 122 | 1 | node.BrowseName = self._migrate_ns(obj.browsename) |
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| 123 | 1 | self.logger.info("Importing xml node (%s, %s) as (%s %s)", obj.browsename, obj.nodeid, node.BrowseName, node.RequestedNewNodeId) |
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| 124 | 1 | node.NodeClass = getattr(ua.NodeClass, obj.nodetype[2:]) |
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| 125 | 1 | if obj.parent: |
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| 126 | 1 | node.ParentNodeId = self._migrate_ns(obj.parent) |
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| 127 | 1 | if obj.parentlink: |
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| 128 | 1 | node.ReferenceTypeId = self._migrate_ns(obj.parentlink) |
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| 129 | 1 | if obj.typedef: |
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| 130 | 1 | node.TypeDefinition = self._migrate_ns(obj.typedef) |
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| 131 | 1 | return node |
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| 132 | |||
| 133 | 1 | def to_nodeid(self, nodeid): |
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| 134 | 1 | if isinstance(nodeid, ua.NodeId): |
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| 135 | return nodeid |
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| 136 | 1 | elif not nodeid: |
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| 137 | return ua.NodeId(ua.ObjectIds.String) |
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| 138 | 1 | elif "=" in nodeid: |
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| 139 | 1 | return ua.NodeId.from_string(nodeid) |
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| 140 | 1 | elif hasattr(ua.ObjectIds, nodeid): |
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| 141 | 1 | return ua.NodeId(getattr(ua.ObjectIds, nodeid)) |
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| 142 | else: |
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| 143 | 1 | if nodeid in self.aliases: |
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| 144 | 1 | return self.aliases[nodeid] |
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| 145 | else: |
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| 146 | return ua.NodeId(getattr(ua.ObjectIds, nodeid)) |
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| 147 | |||
| 148 | 1 | def add_object(self, obj): |
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| 149 | 1 | View Code Duplication | node = self._get_node(obj) |
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Duplication
introduced
by
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| 150 | 1 | attrs = ua.ObjectAttributes() |
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| 151 | 1 | if obj.desc: |
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| 152 | 1 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 153 | 1 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 154 | 1 | attrs.EventNotifier = obj.eventnotifier |
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| 155 | 1 | node.NodeAttributes = attrs |
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| 156 | 1 | res = self._add_node(node) |
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| 157 | 1 | self._add_refs(obj) |
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| 158 | 1 | res[0].StatusCode.check() |
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| 159 | 1 | return res[0].AddedNodeId |
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| 160 | |||
| 161 | 1 | def add_object_type(self, obj): |
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| 162 | 1 | View Code Duplication | node = self._get_node(obj) |
| 163 | 1 | attrs = ua.ObjectTypeAttributes() |
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| 164 | 1 | if obj.desc: |
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| 165 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 166 | 1 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 167 | 1 | attrs.IsAbstract = obj.abstract |
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| 168 | 1 | node.NodeAttributes = attrs |
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| 169 | 1 | res = self._add_node(node) |
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| 170 | 1 | self._add_refs(obj) |
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| 171 | 1 | res[0].StatusCode.check() |
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| 172 | 1 | return res[0].AddedNodeId |
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| 173 | |||
| 174 | 1 | def add_variable(self, obj): |
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| 175 | 1 | node = self._get_node(obj) |
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| 176 | 1 | attrs = ua.VariableAttributes() |
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| 177 | 1 | if obj.desc: |
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| 178 | 1 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 179 | 1 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 180 | 1 | attrs.DataType = self.to_nodeid(obj.datatype) |
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| 181 | 1 | if obj.value is not None: |
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| 182 | 1 | attrs.Value = self._add_variable_value(obj,) |
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| 183 | 1 | if obj.rank: |
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| 184 | 1 | attrs.ValueRank = obj.rank |
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| 185 | 1 | if obj.accesslevel: |
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| 186 | attrs.AccessLevel = obj.accesslevel |
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| 187 | 1 | if obj.useraccesslevel: |
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| 188 | attrs.UserAccessLevel = obj.useraccesslevel |
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| 189 | 1 | if obj.minsample: |
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| 190 | attrs.MinimumSamplingInterval = obj.minsample |
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| 191 | 1 | if obj.dimensions: |
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| 192 | 1 | attrs.ArrayDimensions = obj.dimensions |
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| 193 | 1 | node.NodeAttributes = attrs |
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| 194 | 1 | res = self._add_node(node) |
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| 195 | 1 | self._add_refs(obj) |
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| 196 | 1 | res[0].StatusCode.check() |
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| 197 | 1 | return res[0].AddedNodeId |
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| 198 | |||
| 199 | 1 | def _make_ext_obj(self, obj): |
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| 200 | 1 | ext = getattr(ua, obj.objname)() |
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| 201 | 1 | for name, val in obj.body: |
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| 202 | 1 | if isinstance(val, str): |
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| 203 | raise Exception("Error val should a dict", name, val) |
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| 204 | else: |
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| 205 | 1 | for attname, v in val: |
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| 206 | 1 | self._set_attr(ext, attname, v) |
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| 207 | 1 | return ext |
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| 208 | |||
| 209 | 1 | def _set_attr(self, obj, attname, val): |
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| 210 | # tow possible values: |
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| 211 | # either we get value directly |
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| 212 | # or a dict if it s an object or a list |
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| 213 | 1 | if isinstance(val, str): |
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| 214 | 1 | pval = xmlparser.ua_type_to_python(val, obj.ua_types[attname]) |
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| 215 | 1 | setattr(obj, attname, pval) |
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| 216 | else: |
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| 217 | # so we have either an object or a list... |
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| 218 | 1 | obj2 = getattr(obj, attname) |
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| 219 | 1 | if isinstance(obj2, ua.NodeId): # NodeId representation does not follow common rules!! |
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| 220 | 1 | for attname2, v2 in val: |
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| 221 | 1 | if attname2 == "Identifier": |
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| 222 | 1 | obj2 = ua.NodeId.from_string(v2) |
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| 223 | 1 | setattr(obj, attname, obj2) |
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| 224 | 1 | break |
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| 225 | 1 | elif not isinstance(obj2, ua.NodeId) and not hasattr(obj2, "ua_types"): |
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| 226 | # we probably have a list |
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| 227 | 1 | my_list = [] |
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| 228 | 1 | for vtype, v2 in val: |
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| 229 | 1 | my_list.append(xmlparser.ua_type_to_python(v2, vtype)) |
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| 230 | 1 | setattr(obj, attname, my_list) |
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| 231 | else: |
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| 232 | 1 | for attname2, v2 in val: |
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| 233 | 1 | self._set_attr(obj2, attname2, v2) |
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| 234 | 1 | setattr(obj, attname, obj2) |
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| 235 | |||
| 236 | 1 | def _add_variable_value(self, obj): |
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| 237 | """ |
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| 238 | Returns the value for a Variable based on the objects value type. |
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| 239 | """ |
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| 240 | 1 | self.logger.debug("Setting value with type %s and value %s", obj.valuetype, obj.value) |
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| 241 | 1 | if obj.valuetype == 'ListOfExtensionObject': |
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| 242 | 1 | values = [] |
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| 243 | 1 | for ext in obj.value: |
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| 244 | 1 | extobj = self._make_ext_obj(ext) |
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| 245 | 1 | values.append(extobj) |
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| 246 | 1 | return ua.Variant(values, ua.VariantType.ExtensionObject) |
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| 247 | 1 | elif obj.valuetype == 'ListOfGuid': |
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| 248 | 1 | return ua.Variant([ |
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| 249 | uuid.UUID(guid) for guid in obj.value |
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| 250 | ], getattr(ua.VariantType, obj.valuetype[6:])) |
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| 251 | 1 | elif obj.valuetype.startswith("ListOf"): |
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| 252 | 1 | vtype = obj.valuetype[6:] |
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| 253 | 1 | if hasattr(ua.ua_binary.Primitives, vtype): |
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| 254 | 1 | return ua.Variant(obj.value, getattr(ua.VariantType, vtype)) |
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| 255 | else: |
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| 256 | 1 | return ua.Variant([getattr(ua, vtype)(v) for v in obj.value]) |
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| 257 | 1 | elif obj.valuetype == 'ExtensionObject': |
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| 258 | 1 | extobj = self._make_ext_obj(obj.value) |
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| 259 | 1 | return ua.Variant(extobj, getattr(ua.VariantType, obj.valuetype)) |
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| 260 | 1 | elif obj.valuetype == 'Guid': |
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| 261 | 1 | return ua.Variant(uuid.UUID(obj.value), getattr(ua.VariantType, obj.valuetype)) |
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| 262 | 1 | elif obj.valuetype == 'LocalizedText': |
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| 263 | 1 | ltext = ua.LocalizedText() |
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| 264 | 1 | for name, val in obj.value: |
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| 265 | 1 | if name == "Text": |
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| 266 | 1 | ltext.Text = val.encode("utf-8") |
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| 267 | else: |
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| 268 | self.logger.warning("While parsing localizedText value, unkown element: %s with val: %s", name, val) |
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| 269 | 1 | return ua.Variant(ltext, ua.VariantType.LocalizedText) |
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| 270 | 1 | elif obj.valuetype == 'NodeId': |
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| 271 | 1 | return ua.Variant(ua.NodeId.from_string(obj.value)) |
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| 272 | else: |
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| 273 | 1 | return ua.Variant(obj.value, getattr(ua.VariantType, obj.valuetype)) |
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| 274 | |||
| 275 | 1 | def add_variable_type(self, obj): |
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| 276 | node = self._get_node(obj) |
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| 277 | attrs = ua.VariableTypeAttributes() |
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| 278 | if obj.desc: |
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| 279 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 280 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 281 | attrs.DataType = self.to_nodeid(obj.datatype) |
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| 282 | if obj.value and len(obj.value) == 1: |
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| 283 | attrs.Value = obj.value[0] |
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| 284 | if obj.rank: |
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| 285 | attrs.ValueRank = obj.rank |
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| 286 | if obj.abstract: |
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| 287 | attrs.IsAbstract = obj.abstract |
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| 288 | if obj.dimensions: |
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| 289 | attrs.ArrayDimensions = obj.dimensions |
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| 290 | node.NodeAttributes = attrs |
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| 291 | res = self._add_node(node) |
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| 292 | self._add_refs(obj) |
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| 293 | res[0].StatusCode.check() |
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| 294 | return res[0].AddedNodeId |
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| 295 | |||
| 296 | 1 | def add_method(self, obj): |
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| 297 | 1 | View Code Duplication | node = self._get_node(obj) |
| 298 | 1 | attrs = ua.MethodAttributes() |
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| 299 | 1 | if obj.desc: |
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| 300 | 1 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 301 | 1 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 302 | 1 | if obj.accesslevel: |
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| 303 | attrs.AccessLevel = obj.accesslevel |
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| 304 | 1 | if obj.useraccesslevel: |
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| 305 | attrs.UserAccessLevel = obj.useraccesslevel |
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| 306 | 1 | if obj.minsample: |
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| 307 | attrs.MinimumSamplingInterval = obj.minsample |
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| 308 | 1 | if obj.dimensions: |
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| 309 | attrs.ArrayDimensions = obj.dimensions |
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| 310 | 1 | node.NodeAttributes = attrs |
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| 311 | 1 | res = self._add_node(node) |
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| 312 | 1 | self._add_refs(obj) |
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| 313 | 1 | res[0].StatusCode.check() |
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| 314 | 1 | return res[0].AddedNodeId |
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| 315 | |||
| 316 | 1 | def add_reference_type(self, obj): |
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| 317 | View Code Duplication | node = self._get_node(obj) |
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| 318 | attrs = ua.ReferenceTypeAttributes() |
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| 319 | if obj.desc: |
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| 320 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 321 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 322 | if obj. inversename: |
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| 323 | attrs.InverseName = ua.LocalizedText(obj.inversename) |
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| 324 | if obj.abstract: |
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| 325 | attrs.IsAbstract = obj.abstract |
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| 326 | if obj.symmetric: |
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| 327 | attrs.Symmetric = obj.symmetric |
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| 328 | node.NodeAttributes = attrs |
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| 329 | res = self._add_node(node) |
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| 330 | self._add_refs(obj) |
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| 331 | res[0].StatusCode.check() |
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| 332 | return res[0].AddedNodeId |
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| 333 | |||
| 334 | 1 | def add_datatype(self, obj): |
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| 335 | 1 | View Code Duplication | node = self._get_node(obj) |
| 336 | 1 | attrs = ua.DataTypeAttributes() |
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| 337 | 1 | if obj.desc: |
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| 338 | 1 | attrs.Description = ua.LocalizedText(obj.desc) |
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| 339 | 1 | attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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| 340 | 1 | if obj.abstract: |
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| 341 | attrs.IsAbstract = obj.abstract |
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| 342 | 1 | node.NodeAttributes = attrs |
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| 343 | 1 | res = self._add_node(node) |
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| 344 | 1 | self._add_refs(obj) |
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| 345 | 1 | res[0].StatusCode.check() |
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| 346 | 1 | return res[0].AddedNodeId |
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| 347 | |||
| 348 | 1 | def _add_refs(self, obj): |
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| 349 | 1 | if not obj.refs: |
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| 350 | 1 | return |
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| 351 | 1 | refs = [] |
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| 352 | 1 | for data in obj.refs: |
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| 353 | 1 | ref = ua.AddReferencesItem() |
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| 354 | 1 | ref.IsForward = True |
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| 355 | 1 | ref.ReferenceTypeId = self.to_nodeid(data.reftype) |
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| 356 | 1 | ref.SourceNodeId = self._migrate_ns(obj.nodeid) |
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| 357 | 1 | ref.TargetNodeClass = ua.NodeClass.DataType |
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| 358 | 1 | ref.TargetNodeId = self._migrate_ns(self.to_nodeid(data.target)) |
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| 359 | 1 | refs.append(ref) |
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| 360 | 1 | self._add_references(refs) |
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| 361 | |||
| 362 | 1 | def _sort_nodes_by_parentid(self, ndatas): |
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| 363 | """ |
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| 364 | Sort the list of nodes according their parent node in order to respect |
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| 365 | the dependency between nodes. |
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| 366 | |||
| 367 | :param nodes: list of NodeDataObjects |
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| 368 | :returns: list of sorted nodes |
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| 369 | """ |
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| 370 | 1 | _ndatas = list(ndatas) |
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| 371 | # list of node ids that are already sorted / inserted |
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| 372 | 1 | sorted_nodes_ids = [] |
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| 373 | # list of sorted nodes (i.e. XML Elements) |
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| 374 | 1 | sorted_ndatas = [] |
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| 375 | 1 | all_node_ids = [data.nodeid for data in ndatas] |
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| 376 | # list of namespace indexes that are relevant for this import |
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| 377 | # we can only respect ordering nodes for namespaces indexes that |
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| 378 | # are defined in the xml file itself. Thus we assume that all other |
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| 379 | # references namespaces are already known to the server and should |
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| 380 | # not create any dependency problems (like "NodeNotFound") |
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| 381 | 1 | while len(_ndatas) > 0: |
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| 382 | 1 | pop_nodes = [] |
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| 383 | 1 | for ndata in _ndatas: |
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| 384 | # Insert nodes that |
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| 385 | # (1) have no parent / parent_ns is None (e.g. namespace 0) |
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| 386 | # (2) ns is not in list of relevant namespaces |
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| 387 | 1 | if ndata.nodeid.NamespaceIndex not in self.namespaces or \ |
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| 388 | ndata.parent is None or \ |
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| 389 | ndata.parent not in all_node_ids: |
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| 390 | 1 | sorted_ndatas.append(ndata) |
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| 391 | 1 | sorted_nodes_ids.append(ndata.nodeid) |
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| 392 | 1 | pop_nodes.append(ndata) |
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| 393 | else: |
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| 394 | # Check if the nodes parent is already in the list of |
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| 395 | # inserted nodes |
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| 396 | 1 | if ndata.parent in sorted_nodes_ids: |
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| 397 | 1 | sorted_ndatas.append(ndata) |
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| 398 | 1 | sorted_nodes_ids.append(ndata.nodeid) |
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| 399 | 1 | pop_nodes.append(ndata) |
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| 400 | # Remove inserted nodes from the list |
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| 401 | 1 | for ndata in pop_nodes: |
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| 402 | 1 | _ndatas.pop(_ndatas.index(ndata)) |
|
| 403 | return sorted_ndatas |
||
| 404 |
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