asyncua.common.xmlimporter.XmlImporter._add_variable_value() - Code Metrics - FreeOpcUa/opcua-asyncio - Measure and Improve Code Quality continuously with Scrutinizer

XmlImporter._add_variable_value() F
last analyzed 2020-12-22 17:52 UTC

↳ Parent: asyncua.common.xmlimporter

Complexity

Conditions

Size

Total Lines	42
Code Lines	36

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	14
eloc	36
nop	2
dl	0
loc	42
rs	3.6
c	0
b	0
f	0

How to fix Complexity

"""
add nodes defined in XML to address space
format is the one from opc-ua specification
"""
import logging
import uuid
from typing import Union, Dict
from copy import copy

from asyncua import ua
from .xmlparser import XMLParser, ua_type_to_python
from ..ua.uaerrors import UaError


_logger = logging.getLogger(__name__)


class XmlImporter:

    def __init__(self, server):
        self.parser = None
        self.server = server
        self.namespaces: Dict[int, int] = {}  #Dict[IndexInXml, IndexInServer]
        self.aliases: Dict[str, ua.NodeId] = {}
        self.refs = None

    async def _map_namespaces(self, namespaces_uris):
        """
        creates a mapping between the namespaces in the xml file and in the server.
        if not present the namespace is registered.
        """
        namespaces = {}
        for ns_index, ns_uri in enumerate(namespaces_uris):
            ns_server_index = await self.server.register_namespace(ns_uri)
            namespaces[ns_index + 1] = ns_server_index
        return namespaces

    def _map_aliases(self, aliases: dict):
        """
        maps the import aliases to the correct namespaces
        """
        aliases_mapped = {}
        for alias, node_id in aliases.items():
            aliases_mapped[alias] = self._to_migrated_nodeid(node_id)
        return aliases_mapped

    async def import_xml(self, xmlpath=None, xmlstring=None):
        """
        import xml and return added nodes
        """
        _logger.info("Importing XML file %s", xmlpath)
        self.parser = XMLParser()
        await self.parser.parse(xmlpath, xmlstring)
        self.namespaces = await self._map_namespaces(self.parser.get_used_namespaces())
        _logger.info("namespace map: %s", self.namespaces)
        self.aliases = self._map_aliases(self.parser.get_aliases())
        self.refs = []
        dnodes = self.parser.get_node_datas()
        dnodes = self.make_objects(dnodes)
        self._add_missing_parents(dnodes)
        nodes_parsed = self._sort_nodes_by_parentid(dnodes)
        nodes = []
        for nodedata in nodes_parsed:  # self.parser:
            try:
                node = await self._add_node_data(nodedata)
            except Exception:
                _logger.warning("failure adding node %s", nodedata)
                raise
            nodes.append(node)
        self.refs, remaining_refs = [], self.refs
        await self._add_references(remaining_refs)
        if len(self.refs):
            _logger.warning("The following references could not be imported and are probably broken: %s", self.refs)
        return nodes

    def _add_missing_parents(self, dnodes):
        missing = []
        childs = {}
        for nd in dnodes:
            if not nd.parent or nd.parent == nd.nodeid:
                missing.append(nd)
            for ref in nd.refs:
                if ref.forward:
                    if ref.reftype in [self.server.nodes.HasComponent.nodeid, self.server.nodes.HasProperty.nodeid, self.server.nodes.Organizes.nodeid]:
                        # if a node has several links, the last one will win
                        if ref.target in childs:
                            _logger.warning("overwriting parent target, shouldbe fixed", ref.target, nd.nodeid, ref.reftype, childs[ref.target])
                        childs[ref.target] = (nd.nodeid, ref.reftype)
        for nd in missing:
            if nd.nodeid in childs:
                target, reftype = childs[nd.nodeid]
                nd.parent = target
                nd.parentlink = reftype
                from IPython import embed
                embed()

    async def _add_node_data(self, nodedata) -> ua.NodeId:
        if nodedata.nodetype == "UAObject":
            node = await self.add_object(nodedata)
        elif nodedata.nodetype == "UAObjectType":
            node = await self.add_object_type(nodedata)
        elif nodedata.nodetype == "UAVariable":
            node = await self.add_variable(nodedata)
        elif nodedata.nodetype == "UAVariableType":
            node = await self.add_variable_type(nodedata)
        elif nodedata.nodetype == "UAReferenceType":
            node = await self.add_reference_type(nodedata)
        elif nodedata.nodetype == "UADataType":
            node = await self.add_datatype(nodedata)
        elif nodedata.nodetype == "UAMethod":
            node = await self.add_method(nodedata)
        else:
            raise ValueError(f"Not implemented node type: {nodedata.nodetype} ")
        return node

    def _get_server(self):
        if hasattr(self.server, "iserver"):
            return self.server.iserver.isession
        else:
            return self.server.uaclient

    async def _add_references(self, refs):
        res = await self._get_server().add_references(refs)

        for sc, ref in zip(res, refs):
            if not sc.is_good():
                self.refs.append(ref)

    def make_objects(self, node_data):
        new_nodes = []
        for node_datum in node_data:
            node_datum.nodeid = self._to_migrated_nodeid(node_datum.nodeid)
            node_datum.browsename = ua.QualifiedName.from_string(node_datum.browsename)
            if node_datum.parent:
                node_datum.parent = self._to_migrated_nodeid(node_datum.parent)
            if node_datum.parentlink:
                node_datum.parentlink = self._to_migrated_nodeid(node_datum.parentlink)
            if node_datum.typedef:
                node_datum.typedef = self._to_migrated_nodeid(node_datum.typedef)
            if node_datum.datatype:
                node_datum.datatype = self._to_migrated_nodeid(node_datum.datatype)
            new_nodes.append(node_datum)
            for ref in node_datum.refs:
                ref.reftype = self._to_migrated_nodeid(ref.reftype)
                ref.target = self._to_migrated_nodeid(ref.target)
            for field in node_datum.definitions:
                if field.datatype:
                    field.datatype = self._to_migrated_nodeid(field.datatype)
        return new_nodes

    def _migrate_ns(self, nodeid: ua.NodeId) -> ua.NodeId:
        """
        Check if the index of nodeid or browsename  given in the xml model file
        must be converted to a already existing namespace id based on the files
        namespace uri

        :returns: NodeId (str)
        """
        if nodeid.NamespaceIndex in self.namespaces:
            nodeid = copy(nodeid)
            nodeid.NamespaceIndex = self.namespaces[nodeid.NamespaceIndex]
        return nodeid

    def _get_add_node_item(self, obj):
        node = ua.AddNodesItem()
        node.RequestedNewNodeId = self._migrate_ns(obj.nodeid)
        node.BrowseName = self._migrate_ns(obj.browsename)
        _logger.info("Importing xml node (%s, %s) as (%s %s)", obj.browsename,
                         obj.nodeid, node.BrowseName, node.RequestedNewNodeId)
        node.NodeClass = getattr(ua.NodeClass, obj.nodetype[2:])
        if obj.parent and obj.parentlink:
            node.ParentNodeId = self._migrate_ns(obj.parent)
            node.ReferenceTypeId = self._migrate_ns(obj.parentlink)
        if obj.typedef:
            node.TypeDefinition = self._migrate_ns(obj.typedef)
        return node

    def _to_migrated_nodeid(self, nodeid: Union[ua.NodeId, None, str]) -> ua.NodeId:
        nodeid = self._to_nodeid(nodeid)
        return self._migrate_ns(nodeid)

    def _to_nodeid(self, nodeid: Union[ua.NodeId, None, str]) -> ua.NodeId:
        if isinstance(nodeid, ua.NodeId):
            return nodeid
        elif not nodeid:
            return ua.NodeId(ua.ObjectIds.String)
        elif "=" in nodeid:
            return ua.NodeId.from_string(nodeid)
        elif hasattr(ua.ObjectIds, nodeid):
            return ua.NodeId(getattr(ua.ObjectIds, nodeid))
        else:
            if nodeid in self.aliases:
                return self.aliases[nodeid]
            else:
                return ua.NodeId(getattr(ua.ObjectIds, nodeid))

    async def add_object(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.ObjectAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        attrs.EventNotifier = obj.eventnotifier
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    async def add_object_type(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.ObjectTypeAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        attrs.IsAbstract = obj.abstract
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    async def add_variable(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.VariableAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        attrs.DataType = obj.datatype
        if obj.value is not None:
            attrs.Value = self._add_variable_value(obj,)
        if obj.rank:
            attrs.ValueRank = obj.rank
        if obj.accesslevel:
            attrs.AccessLevel = obj.accesslevel
        if obj.useraccesslevel:
            attrs.UserAccessLevel = obj.useraccesslevel
        if obj.minsample:
            attrs.MinimumSamplingInterval = obj.minsample
        if obj.dimensions:
            attrs.ArrayDimensions = obj.dimensions
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    def _get_ext_class(self, name: str):
        if hasattr(ua, name):
            return getattr(ua, name)
        elif name in self.aliases.keys():
            nodeid = self.aliases[name]
            class_type = ua.uatypes.get_extensionobject_class_type(nodeid)
            if class_type:
                return class_type
            else:
                raise Exception("Error no extension class registered ", name, nodeid)
        else:
            raise Exception("Error no alias found for extension class", name)

    def _make_ext_obj(self, obj):
        ext = self._get_ext_class(obj.objname)()
        for name, val in obj.body:
            if not isinstance(val, list):
                raise Exception("Error val should be a list, this is a python-asyncua bug", name, type(val), val)
            else:
                for attname, v in val:
                    self._set_attr(ext, attname, v)
        return ext

    def _get_val_type(self, obj, attname: str):
        for name, uatype in obj.ua_types:
            if name == attname:
                return uatype
        raise UaError(f"Attribute '{attname}' defined in xml is not found in object '{obj}'")

    def _set_attr(self, obj, attname: str, val):
        # tow possible values:
        # either we get value directly
        # or a dict if it s an object or a list
        if isinstance(val, str):
            pval = ua_type_to_python(val, self._get_val_type(obj, attname))
            setattr(obj, attname, pval)
        else:
            # so we have either an object or a list...
            obj2 = getattr(obj, attname)
            if isinstance(obj2, ua.NodeId):  # NodeId representation does not follow common rules!!
                for attname2, v2 in val:
                    if attname2 == "Identifier":
                        if hasattr(ua.ObjectIds, v2):
                            obj2 = ua.NodeId(getattr(ua.ObjectIds, v2))
                        else:
                            obj2 = ua.NodeId.from_string(v2)
                        setattr(obj, attname, self._migrate_ns(obj2))
                        break
            elif not hasattr(obj2, "ua_types"):
                # we probably have a list
                my_list = []
                for vtype, v2 in val:
                    my_list.append(ua_type_to_python(v2, vtype))
                setattr(obj, attname, my_list)
            else:
                for attname2, v2 in val:
                    self._set_attr(obj2, attname2, v2)
                setattr(obj, attname, obj2)

    def _add_variable_value(self, obj):
        """
        Returns the value for a Variable based on the objects value type.
        """
        _logger.debug("Setting value with type %s and value %s", obj.valuetype, obj.value)
        if obj.valuetype == 'ListOfExtensionObject':
            values = []
            for ext in obj.value:
                extobj = self._make_ext_obj(ext)
                values.append(extobj)
            return ua.Variant(values, ua.VariantType.ExtensionObject)
        elif obj.valuetype == 'ListOfGuid':
            return ua.Variant([
                uuid.UUID(guid) for guid in obj.value
            ], getattr(ua.VariantType, obj.valuetype[6:]))
        elif obj.valuetype.startswith("ListOf"):
            vtype = obj.valuetype[6:]
            if hasattr(ua.ua_binary.Primitives, vtype):
                return ua.Variant(obj.value, getattr(ua.VariantType, vtype))
            elif vtype == "LocalizedText":
                return ua.Variant([getattr(ua, vtype)(text=item["Text"], locale=item["Locale"]) for item in obj.value])
            else:
                return ua.Variant([getattr(ua, vtype)(v) for v in obj.value])
        elif obj.valuetype == 'ExtensionObject':
            extobj = self._make_ext_obj(obj.value)
            return ua.Variant(extobj, getattr(ua.VariantType, obj.valuetype))
        elif obj.valuetype == 'Guid':
            return ua.Variant(uuid.UUID(obj.value), getattr(ua.VariantType, obj.valuetype))
        elif obj.valuetype == 'LocalizedText':
            ltext = ua.LocalizedText()
            for name, val in obj.value:
                if name == "Text":
                    ltext.Text = val
                elif name == "Locale":
                    ltext.Locale = val
                else:
                    _logger.warning("While parsing localizedText value, unkown element: %s with val: %s", name, val)
            return ua.Variant(ltext, ua.VariantType.LocalizedText)
        elif obj.valuetype == 'NodeId':
            return ua.Variant(ua.NodeId.from_string(obj.value))
        else:
            return ua.Variant(obj.value, getattr(ua.VariantType, obj.valuetype))

    async def add_variable_type(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.VariableTypeAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        attrs.DataType = obj.datatype
        if obj.value and len(obj.value) == 1:
            attrs.Value = obj.value[0]
        if obj.rank:
            attrs.ValueRank = obj.rank
        if obj.abstract:
            attrs.IsAbstract = obj.abstract
        if obj.dimensions:
            attrs.ArrayDimensions = obj.dimensions
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    async def add_method(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.MethodAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        if obj.accesslevel:
            attrs.AccessLevel = obj.accesslevel
        if obj.useraccesslevel:
            attrs.UserAccessLevel = obj.useraccesslevel
        if obj.minsample:
            attrs.MinimumSamplingInterval = obj.minsample
        if obj.dimensions:
            attrs.ArrayDimensions = obj.dimensions
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    async def add_reference_type(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.ReferenceTypeAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        if obj. inversename:
            attrs.InverseName = ua.LocalizedText(obj.inversename)
        if obj.abstract:
            attrs.IsAbstract = obj.abstract
        if obj.symmetric:
            attrs.Symmetric = obj.symmetric
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        await self._add_refs(obj)
        res[0].StatusCode.check()
        return res[0].AddedNodeId

    async def add_datatype(self, obj):
        node = self._get_add_node_item(obj)
        attrs = ua.DataTypeAttributes()
        if obj.desc:
            attrs.Description = ua.LocalizedText(obj.desc)
        attrs.DisplayName = ua.LocalizedText(obj.displayname)
        if obj.abstract:
            attrs.IsAbstract = obj.abstract
        if not obj.definitions:
            pass
        else:
            if obj.parent == self.server.nodes.enum_data_type.nodeid:
                attrs.DataTypeDefinition = self._get_edef(node, obj)
            elif obj.parent == self.server.nodes.base_structure_type.nodeid:
                attrs.DataTypeDefinition = self._get_sdef(node, obj)
            else:
                parent_node = self.server.get_node(obj.parent)
                path = await parent_node.get_path()
                if self.server.nodes.base_structure_type in path:
                    attrs.DataTypeDefinition = self._get_sdef(node, obj)
                else:
                    _logger.warning("%s has datatypedefinition and path %s but we could not find out if this is a struct", obj, path)
        node.NodeAttributes = attrs
        res = await self._get_server().add_nodes([node])
        res[0].StatusCode.check()
        await self._add_refs(obj)
        return res[0].AddedNodeId

    async def _add_refs(self, obj):
        if not obj.refs:
            return
        refs = []
        for data in obj.refs:
            ref = ua.AddReferencesItem()
            ref.IsForward = data.forward
            ref.ReferenceTypeId = data.reftype
            ref.SourceNodeId = obj.nodeid
            ref.TargetNodeId = data.target
            refs.append(ref)
        await self._add_references(refs)

    def _get_edef(self, node, obj):
        if not obj.definitions:
            return None
        edef = ua.EnumDefinition()
        if obj.parent:
            edef.BaseDataType = obj.parent
        for field in obj.definitions:
            f = ua.EnumField()
            f.Name = field.name
            if field.dname:
                f.DisplayName = ua.LocalizedText(text=field.dname)
            else:
                f.DisplayName = ua.LocalizedText(text=field.name)
            f.Value = field.value
            f.Description = ua.LocalizedText(text=field.desc)
            edef.Fields.append(f)
        return edef

    def _get_sdef(self, node, obj):
        if not obj.definitions:
            return None
        sdef = ua.StructureDefinition()
        if obj.parent:
            sdef.BaseDataType = obj.parent
        for data in obj.refs:
            if data.reftype == self.server.nodes.HasEncoding.nodeid:
                # looks likebinary encodingisthe firt one...can someone confirm?
                sdef.DefaultEncodingId = data.target
                break
        optional = False
        for field in obj.definitions:
            f = ua.StructureField()
            f.Name = field.name
            f.DataType = field.datatype
            f.ValueRank = field.valuerank
            f.IsOptional = field.optional
            if f.IsOptional:
                optional = True
            f.ArrayDimensions = field.arraydim
            f.Description = ua.LocalizedText(text=field.desc)
            sdef.Fields.append(f)
        if optional:
            sdef.StructureType = ua.StructureType.StructureWithOptionalFields
        else:
            sdef.StructureType = ua.StructureType.Structure
        return sdef

    def _sort_nodes_by_parentid(self, ndatas):
        """
        Sort the list of nodes according their parent node in order to respect
        the dependency between nodes.

        :param nodes: list of NodeDataObjects
        :returns: list of sorted nodes
        """

        sorted_ndatas = []
        sorted_nodes_ids = []
        all_node_ids = [data.nodeid for data in ndatas]
        while ndatas:
            for ndata in ndatas[:]:
                if ndata.nodeid.NamespaceIndex not in self.namespaces.values() or \
                        ndata.parent is None or \
                        ndata.parent not in all_node_ids:
                    sorted_ndatas.append(ndata)
                    sorted_nodes_ids.append(ndata.nodeid)
                    ndatas.remove(ndata)
                else:
                    # Check if the nodes parent is already in the list of
                    # inserted nodes
                    if ndata.parent in sorted_nodes_ids:
                        sorted_ndatas.append(ndata)
                        sorted_nodes_ids.append(ndata.nodeid)
                        ndatas.remove(ndata)
        return sorted_ndatas


1			"""
2			add nodes defined in XML to address space
3			format is the one from opc-ua specification
4			"""
5			import logging
6			import uuid
7			from typing import Union, Dict
8			from copy import copy
9
10			from asyncua import ua
11			from .xmlparser import XMLParser, ua_type_to_python
12			from ..ua.uaerrors import UaError
13
14
15			_logger = logging.getLogger(__name__)
16
17
18			class XmlImporter:
19
20			def __init__(self, server):
21			self.parser = None
22			self.server = server
23			self.namespaces: Dict[int, int] = {} #Dict[IndexInXml, IndexInServer]
24			self.aliases: Dict[str, ua.NodeId] = {}
25			self.refs = None
26
27			async def _map_namespaces(self, namespaces_uris):
28			"""
29			creates a mapping between the namespaces in the xml file and in the server.
30			if not present the namespace is registered.
31			"""
32			namespaces = {}
33			for ns_index, ns_uri in enumerate(namespaces_uris):
34			ns_server_index = await self.server.register_namespace(ns_uri)
35			namespaces[ns_index + 1] = ns_server_index
36			return namespaces
37
38			def _map_aliases(self, aliases: dict):
39			"""
40			maps the import aliases to the correct namespaces
41			"""
42			aliases_mapped = {}
43			for alias, node_id in aliases.items():
44			aliases_mapped[alias] = self._to_migrated_nodeid(node_id)
45			return aliases_mapped
46
47			async def import_xml(self, xmlpath=None, xmlstring=None):
48			"""
49			import xml and return added nodes
50			"""
51			_logger.info("Importing XML file %s", xmlpath)
52			self.parser = XMLParser()
53			await self.parser.parse(xmlpath, xmlstring)
54			self.namespaces = await self._map_namespaces(self.parser.get_used_namespaces())
55			_logger.info("namespace map: %s", self.namespaces)
56			self.aliases = self._map_aliases(self.parser.get_aliases())
57			self.refs = []
58			dnodes = self.parser.get_node_datas()
59			dnodes = self.make_objects(dnodes)
60			self._add_missing_parents(dnodes)
61			nodes_parsed = self._sort_nodes_by_parentid(dnodes)
62			nodes = []
63			for nodedata in nodes_parsed: # self.parser:
64			try:
65			node = await self._add_node_data(nodedata)
66			except Exception:
67			_logger.warning("failure adding node %s", nodedata)
68			raise
69			nodes.append(node)
70			self.refs, remaining_refs = [], self.refs
71			await self._add_references(remaining_refs)
72			if len(self.refs):
73			_logger.warning("The following references could not be imported and are probably broken: %s", self.refs)
74			return nodes
75
76			def _add_missing_parents(self, dnodes):
77			missing = []
78			childs = {}
79			for nd in dnodes:
80			if not nd.parent or nd.parent == nd.nodeid:
81			missing.append(nd)
82			for ref in nd.refs:
83			if ref.forward:
84			if ref.reftype in [self.server.nodes.HasComponent.nodeid, self.server.nodes.HasProperty.nodeid, self.server.nodes.Organizes.nodeid]:
85			# if a node has several links, the last one will win
86			if ref.target in childs:
87			_logger.warning("overwriting parent target, shouldbe fixed", ref.target, nd.nodeid, ref.reftype, childs[ref.target])
88			childs[ref.target] = (nd.nodeid, ref.reftype)
89			for nd in missing:
90			if nd.nodeid in childs:
91			target, reftype = childs[nd.nodeid]
92			nd.parent = target
93			nd.parentlink = reftype
94			from IPython import embed
95			embed()
96
97			async def _add_node_data(self, nodedata) -> ua.NodeId:
98			if nodedata.nodetype == "UAObject":
99			node = await self.add_object(nodedata)
100			elif nodedata.nodetype == "UAObjectType":
101			node = await self.add_object_type(nodedata)
102			elif nodedata.nodetype == "UAVariable":
103			node = await self.add_variable(nodedata)
104			elif nodedata.nodetype == "UAVariableType":
105			node = await self.add_variable_type(nodedata)
106			elif nodedata.nodetype == "UAReferenceType":
107			node = await self.add_reference_type(nodedata)
108			elif nodedata.nodetype == "UADataType":
109			node = await self.add_datatype(nodedata)
110			elif nodedata.nodetype == "UAMethod":
111			node = await self.add_method(nodedata)
112			else:
113			raise ValueError(f"Not implemented node type: {nodedata.nodetype} ")
114			return node
115
116			def _get_server(self):
117			if hasattr(self.server, "iserver"):
118			return self.server.iserver.isession
119			else:
120			return self.server.uaclient
121
122			async def _add_references(self, refs):
123			res = await self._get_server().add_references(refs)
124
125			for sc, ref in zip(res, refs):
126			if not sc.is_good():
127			self.refs.append(ref)
128
129			def make_objects(self, node_data):
130			new_nodes = []
131			for node_datum in node_data:
132			node_datum.nodeid = self._to_migrated_nodeid(node_datum.nodeid)
133			node_datum.browsename = ua.QualifiedName.from_string(node_datum.browsename)
134			if node_datum.parent:
135			node_datum.parent = self._to_migrated_nodeid(node_datum.parent)
136			if node_datum.parentlink:
137			node_datum.parentlink = self._to_migrated_nodeid(node_datum.parentlink)
138			if node_datum.typedef:
139			node_datum.typedef = self._to_migrated_nodeid(node_datum.typedef)
140			if node_datum.datatype:
141			node_datum.datatype = self._to_migrated_nodeid(node_datum.datatype)
142			new_nodes.append(node_datum)
143			for ref in node_datum.refs:
144			ref.reftype = self._to_migrated_nodeid(ref.reftype)
145			ref.target = self._to_migrated_nodeid(ref.target)
146			for field in node_datum.definitions:
147			if field.datatype:
148			field.datatype = self._to_migrated_nodeid(field.datatype)
149			return new_nodes
150
151			def _migrate_ns(self, nodeid: ua.NodeId) -> ua.NodeId:
152			"""
153			Check if the index of nodeid or browsename given in the xml model file
154			must be converted to a already existing namespace id based on the files
155			namespace uri
156
157			:returns: NodeId (str)
158			"""
159			if nodeid.NamespaceIndex in self.namespaces:
160			nodeid = copy(nodeid)
161			nodeid.NamespaceIndex = self.namespaces[nodeid.NamespaceIndex]
162			return nodeid
163
164			def _get_add_node_item(self, obj):
165			node = ua.AddNodesItem()
166			node.RequestedNewNodeId = self._migrate_ns(obj.nodeid)
167			node.BrowseName = self._migrate_ns(obj.browsename)
168			_logger.info("Importing xml node (%s, %s) as (%s %s)", obj.browsename,
169			obj.nodeid, node.BrowseName, node.RequestedNewNodeId)
170			node.NodeClass = getattr(ua.NodeClass, obj.nodetype[2:])
171			if obj.parent and obj.parentlink:
172			node.ParentNodeId = self._migrate_ns(obj.parent)
173			node.ReferenceTypeId = self._migrate_ns(obj.parentlink)
174			if obj.typedef:
175			node.TypeDefinition = self._migrate_ns(obj.typedef)
176			return node
177
178			def _to_migrated_nodeid(self, nodeid: Union[ua.NodeId, None, str]) -> ua.NodeId:
179			nodeid = self._to_nodeid(nodeid)
180			return self._migrate_ns(nodeid)
181
182			def _to_nodeid(self, nodeid: Union[ua.NodeId, None, str]) -> ua.NodeId:
183			if isinstance(nodeid, ua.NodeId):
184			return nodeid
185			elif not nodeid:
186			return ua.NodeId(ua.ObjectIds.String)
187			elif "=" in nodeid:
188			return ua.NodeId.from_string(nodeid)
189			elif hasattr(ua.ObjectIds, nodeid):
190			return ua.NodeId(getattr(ua.ObjectIds, nodeid))
191			else:
192			if nodeid in self.aliases:
193			return self.aliases[nodeid]
194			else:
195			return ua.NodeId(getattr(ua.ObjectIds, nodeid))
196
197			async def add_object(self, obj):
198			node = self._get_add_node_item(obj)
199			attrs = ua.ObjectAttributes()
200			if obj.desc:
201			attrs.Description = ua.LocalizedText(obj.desc)
202			attrs.DisplayName = ua.LocalizedText(obj.displayname)
203			attrs.EventNotifier = obj.eventnotifier
204			node.NodeAttributes = attrs
205			res = await self._get_server().add_nodes([node])
206			await self._add_refs(obj)
207			res[0].StatusCode.check()
208			return res[0].AddedNodeId
209
210			async def add_object_type(self, obj):
211			node = self._get_add_node_item(obj)
212			attrs = ua.ObjectTypeAttributes()
213			if obj.desc:
214			attrs.Description = ua.LocalizedText(obj.desc)
215			attrs.DisplayName = ua.LocalizedText(obj.displayname)
216			attrs.IsAbstract = obj.abstract
217			node.NodeAttributes = attrs
218			res = await self._get_server().add_nodes([node])
219			await self._add_refs(obj)
220			res[0].StatusCode.check()
221			return res[0].AddedNodeId
222
223			async def add_variable(self, obj):
224			node = self._get_add_node_item(obj)
225			attrs = ua.VariableAttributes()
226			if obj.desc:
227			attrs.Description = ua.LocalizedText(obj.desc)
228			attrs.DisplayName = ua.LocalizedText(obj.displayname)
229			attrs.DataType = obj.datatype
230			if obj.value is not None:
231			attrs.Value = self._add_variable_value(obj,)
232			if obj.rank:
233			attrs.ValueRank = obj.rank
234			if obj.accesslevel:
235			attrs.AccessLevel = obj.accesslevel
236			if obj.useraccesslevel:
237			attrs.UserAccessLevel = obj.useraccesslevel
238			if obj.minsample:
239			attrs.MinimumSamplingInterval = obj.minsample
240			if obj.dimensions:
241			attrs.ArrayDimensions = obj.dimensions
242			node.NodeAttributes = attrs
243			res = await self._get_server().add_nodes([node])
244			await self._add_refs(obj)
245			res[0].StatusCode.check()
246			return res[0].AddedNodeId
247
248			def _get_ext_class(self, name: str):
249			if hasattr(ua, name):
250			return getattr(ua, name)
251			elif name in self.aliases.keys():
252			nodeid = self.aliases[name]
253			class_type = ua.uatypes.get_extensionobject_class_type(nodeid)
254			if class_type:
255			return class_type
256			else:
257			raise Exception("Error no extension class registered ", name, nodeid)
258			else:
259			raise Exception("Error no alias found for extension class", name)
260
261			def _make_ext_obj(self, obj):
262			ext = self._get_ext_class(obj.objname)()
263			for name, val in obj.body:
264			if not isinstance(val, list):
265			raise Exception("Error val should be a list, this is a python-asyncua bug", name, type(val), val)
266			else:
267			for attname, v in val:
268			self._set_attr(ext, attname, v)
269			return ext
270
271			def _get_val_type(self, obj, attname: str):
272			for name, uatype in obj.ua_types:
273			if name == attname:
274			return uatype
275			raise UaError(f"Attribute '{attname}' defined in xml is not found in object '{obj}'")
276
277			def _set_attr(self, obj, attname: str, val):
278			# tow possible values:
279			# either we get value directly
280			# or a dict if it s an object or a list
281			if isinstance(val, str):
282			pval = ua_type_to_python(val, self._get_val_type(obj, attname))
283			setattr(obj, attname, pval)
284			else:
285			# so we have either an object or a list...
286			obj2 = getattr(obj, attname)
287			if isinstance(obj2, ua.NodeId): # NodeId representation does not follow common rules!!
288			for attname2, v2 in val:
289			if attname2 == "Identifier":
290			if hasattr(ua.ObjectIds, v2):
291			obj2 = ua.NodeId(getattr(ua.ObjectIds, v2))
292			else:
293			obj2 = ua.NodeId.from_string(v2)
294			setattr(obj, attname, self._migrate_ns(obj2))
295			break
296			elif not hasattr(obj2, "ua_types"):
297			# we probably have a list
298			my_list = []
299			for vtype, v2 in val:
300			my_list.append(ua_type_to_python(v2, vtype))
301			setattr(obj, attname, my_list)
302			else:
303			for attname2, v2 in val:
304			self._set_attr(obj2, attname2, v2)
305			setattr(obj, attname, obj2)
306
307			def _add_variable_value(self, obj):
308			"""
309			Returns the value for a Variable based on the objects value type.
310			"""
311			_logger.debug("Setting value with type %s and value %s", obj.valuetype, obj.value)
312			if obj.valuetype == 'ListOfExtensionObject':
313			values = []
314			for ext in obj.value:
315			extobj = self._make_ext_obj(ext)
316			values.append(extobj)
317			return ua.Variant(values, ua.VariantType.ExtensionObject)
318			elif obj.valuetype == 'ListOfGuid':
319			return ua.Variant([
320			uuid.UUID(guid) for guid in obj.value
321			], getattr(ua.VariantType, obj.valuetype[6:]))
322			elif obj.valuetype.startswith("ListOf"):
323			vtype = obj.valuetype[6:]
324			if hasattr(ua.ua_binary.Primitives, vtype):
325			return ua.Variant(obj.value, getattr(ua.VariantType, vtype))
326			elif vtype == "LocalizedText":
327			return ua.Variant([getattr(ua, vtype)(text=item["Text"], locale=item["Locale"]) for item in obj.value])
328			else:
329			return ua.Variant([getattr(ua, vtype)(v) for v in obj.value])
330			elif obj.valuetype == 'ExtensionObject':
331			extobj = self._make_ext_obj(obj.value)
332			return ua.Variant(extobj, getattr(ua.VariantType, obj.valuetype))
333			elif obj.valuetype == 'Guid':
334			return ua.Variant(uuid.UUID(obj.value), getattr(ua.VariantType, obj.valuetype))
335			elif obj.valuetype == 'LocalizedText':
336			ltext = ua.LocalizedText()
337			for name, val in obj.value:
338			if name == "Text":
339			ltext.Text = val
340			elif name == "Locale":
341			ltext.Locale = val
342			else:
343			_logger.warning("While parsing localizedText value, unkown element: %s with val: %s", name, val)
344			return ua.Variant(ltext, ua.VariantType.LocalizedText)
345			elif obj.valuetype == 'NodeId':
346			return ua.Variant(ua.NodeId.from_string(obj.value))
347			else:
348			return ua.Variant(obj.value, getattr(ua.VariantType, obj.valuetype))
349
350			async def add_variable_type(self, obj):
351			node = self._get_add_node_item(obj)
352			attrs = ua.VariableTypeAttributes()
353			if obj.desc:
354			attrs.Description = ua.LocalizedText(obj.desc)
355			attrs.DisplayName = ua.LocalizedText(obj.displayname)
356			attrs.DataType = obj.datatype
357			if obj.value and len(obj.value) == 1:
358			attrs.Value = obj.value[0]
359			if obj.rank:
360			attrs.ValueRank = obj.rank
361			if obj.abstract:
362			attrs.IsAbstract = obj.abstract
363			if obj.dimensions:
364			attrs.ArrayDimensions = obj.dimensions
365			node.NodeAttributes = attrs
366			res = await self._get_server().add_nodes([node])
367			await self._add_refs(obj)
368			res[0].StatusCode.check()
369			return res[0].AddedNodeId
370
371			async def add_method(self, obj):
372			node = self._get_add_node_item(obj)
373			attrs = ua.MethodAttributes()
374			if obj.desc:
375			attrs.Description = ua.LocalizedText(obj.desc)
376			attrs.DisplayName = ua.LocalizedText(obj.displayname)
377			if obj.accesslevel:
378			attrs.AccessLevel = obj.accesslevel
379			if obj.useraccesslevel:
380			attrs.UserAccessLevel = obj.useraccesslevel
381			if obj.minsample:
382			attrs.MinimumSamplingInterval = obj.minsample
383			if obj.dimensions:
384			attrs.ArrayDimensions = obj.dimensions
385			node.NodeAttributes = attrs
386			res = await self._get_server().add_nodes([node])
387			await self._add_refs(obj)
388			res[0].StatusCode.check()
389			return res[0].AddedNodeId
390
391			async def add_reference_type(self, obj):
392			node = self._get_add_node_item(obj)
393			attrs = ua.ReferenceTypeAttributes()
394			if obj.desc:
395			attrs.Description = ua.LocalizedText(obj.desc)
396			attrs.DisplayName = ua.LocalizedText(obj.displayname)
397			if obj. inversename:
398			attrs.InverseName = ua.LocalizedText(obj.inversename)
399			if obj.abstract:
400			attrs.IsAbstract = obj.abstract
401			if obj.symmetric:
402			attrs.Symmetric = obj.symmetric
403			node.NodeAttributes = attrs
404			res = await self._get_server().add_nodes([node])
405			await self._add_refs(obj)
406			res[0].StatusCode.check()
407			return res[0].AddedNodeId
408
409			async def add_datatype(self, obj):
410			node = self._get_add_node_item(obj)
411			attrs = ua.DataTypeAttributes()
412			if obj.desc:
413			attrs.Description = ua.LocalizedText(obj.desc)
414			attrs.DisplayName = ua.LocalizedText(obj.displayname)
415			if obj.abstract:
416			attrs.IsAbstract = obj.abstract
417			if not obj.definitions:
418			pass
419			else:
420			if obj.parent == self.server.nodes.enum_data_type.nodeid:
421			attrs.DataTypeDefinition = self._get_edef(node, obj)
422			elif obj.parent == self.server.nodes.base_structure_type.nodeid:
423			attrs.DataTypeDefinition = self._get_sdef(node, obj)
424			else:
425			parent_node = self.server.get_node(obj.parent)
426			path = await parent_node.get_path()
427			if self.server.nodes.base_structure_type in path:
428			attrs.DataTypeDefinition = self._get_sdef(node, obj)
429			else:
430			_logger.warning("%s has datatypedefinition and path %s but we could not find out if this is a struct", obj, path)
431			node.NodeAttributes = attrs
432			res = await self._get_server().add_nodes([node])
433			res[0].StatusCode.check()
434			await self._add_refs(obj)
435			return res[0].AddedNodeId
436
437			async def _add_refs(self, obj):
438			if not obj.refs:
439			return
440			refs = []
441			for data in obj.refs:
442			ref = ua.AddReferencesItem()
443			ref.IsForward = data.forward
444			ref.ReferenceTypeId = data.reftype
445			ref.SourceNodeId = obj.nodeid
446			ref.TargetNodeId = data.target
447			refs.append(ref)
448			await self._add_references(refs)
449
450			def _get_edef(self, node, obj):
451			if not obj.definitions:
452			return None
453			edef = ua.EnumDefinition()
454			if obj.parent:
455			edef.BaseDataType = obj.parent
456			for field in obj.definitions:
457			f = ua.EnumField()
458			f.Name = field.name
459			if field.dname:
460			f.DisplayName = ua.LocalizedText(text=field.dname)
461			else:
462			f.DisplayName = ua.LocalizedText(text=field.name)
463			f.Value = field.value
464			f.Description = ua.LocalizedText(text=field.desc)
465			edef.Fields.append(f)
466			return edef
467
468			def _get_sdef(self, node, obj):
469			if not obj.definitions:
470			return None
471			sdef = ua.StructureDefinition()
472			if obj.parent:
473			sdef.BaseDataType = obj.parent
474			for data in obj.refs:
475			if data.reftype == self.server.nodes.HasEncoding.nodeid:
476			# looks likebinary encodingisthe firt one...can someone confirm?
477			sdef.DefaultEncodingId = data.target
478			break
479			optional = False
480			for field in obj.definitions:
481			f = ua.StructureField()
482			f.Name = field.name
483			f.DataType = field.datatype
484			f.ValueRank = field.valuerank
485			f.IsOptional = field.optional
486			if f.IsOptional:
487			optional = True
488			f.ArrayDimensions = field.arraydim
489			f.Description = ua.LocalizedText(text=field.desc)
490			sdef.Fields.append(f)
491			if optional:
492			sdef.StructureType = ua.StructureType.StructureWithOptionalFields
493			else:
494			sdef.StructureType = ua.StructureType.Structure
495			return sdef
496
497			def _sort_nodes_by_parentid(self, ndatas):
498			"""
499			Sort the list of nodes according their parent node in order to respect
500			the dependency between nodes.
501
502			:param nodes: list of NodeDataObjects
503			:returns: list of sorted nodes
504			"""
505
506			sorted_ndatas = []
507			sorted_nodes_ids = []
508			all_node_ids = [data.nodeid for data in ndatas]
509			while ndatas:
510			for ndata in ndatas[:]:
511			if ndata.nodeid.NamespaceIndex not in self.namespaces.values() or \
512			ndata.parent is None or \
513			ndata.parent not in all_node_ids:
514			sorted_ndatas.append(ndata)
515			sorted_nodes_ids.append(ndata.nodeid)
516			ndatas.remove(ndata)
517			else:
518			# Check if the nodes parent is already in the list of
519			# inserted nodes
520			if ndata.parent in sorted_nodes_ids:
521			sorted_ndatas.append(ndata)
522			sorted_nodes_ids.append(ndata.nodeid)
523			ndatas.remove(ndata)
524			return sorted_ndatas
525

FreeOpcUa / opcua-asyncio

XmlImporter._add_variable_value() F last analyzed 2020-12-22 17:52 UTC

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XmlImporter._add_variable_value() F
last analyzed 2020-12-22 17:52 UTC