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""" |
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add node defined in XML to address space |
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format is the one from opc-ua specification |
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""" |
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import logging |
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from opcua import ua |
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from opcua.common import xmlparser |
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class XmlImporter(object): |
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def __init__(self, server): |
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self.logger = logging.getLogger(__name__) |
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self.parser = None |
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self.server = server |
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def import_xml(self, xmlpath): |
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self.logger.info("Importing XML file %s", xmlpath) |
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self.parser = xmlparser.XMLParser(xmlpath) |
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for node in self.parser: |
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if node.nodetype == 'UAObject': |
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self.add_object(node) |
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elif node.nodetype == 'UAObjectType': |
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self.add_object_type(node) |
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elif node.nodetype == 'UAVariable': |
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self.add_variable(node) |
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elif node.nodetype == 'UAVariableType': |
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self.add_variable_type(node) |
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elif node.nodetype == 'UAReferenceType': |
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self.add_reference(node) |
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elif node.nodetype == 'UADataType': |
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self.add_datatype(node) |
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elif node.nodetype == 'UAMethod': |
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self.add_method(node) |
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else: |
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self.logger.info("Not implemented node type: %s ", node.nodetype) |
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def _get_node(self, obj): |
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node = ua.AddNodesItem() |
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node.RequestedNewNodeId = ua.NodeId.from_string(obj.nodeid) |
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node.BrowseName = ua.QualifiedName.from_string(obj.browsename) |
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node.NodeClass = getattr(ua.NodeClass, obj.nodetype[2:]) |
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if obj.parent: |
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node.ParentNodeId = ua.NodeId.from_string(obj.parent) |
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if obj.parentlink: |
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node.ReferenceTypeId = self.to_ref_type(obj.parentlink) |
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if obj.typedef: |
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node.TypeDefinition = ua.NodeId.from_string(obj.typedef) |
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return node |
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def to_data_type(self, nodeid): |
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if not nodeid: |
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return ua.NodeId(ua.ObjectIds.String) |
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if "=" in nodeid: |
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return ua.NodeId.from_string(nodeid) |
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else: |
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return ua.NodeId(getattr(ua.ObjectIds, nodeid)) |
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def to_ref_type(self, nodeid): |
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if "=" not in nodeid: |
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if nodeid in self.parser.aliases: |
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nodeid = self.parser.aliases[nodeid] |
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else: |
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nodeid = "i={}".format(getattr(ua.ObjectIds, nodeid)) |
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return ua.NodeId.from_string(nodeid) |
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def add_object(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.ObjectAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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attrs.EventNotifier = obj.eventnotifier |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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def add_object_type(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.ObjectTypeAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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attrs.IsAbstract = obj.abstract |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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def add_variable(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.VariableAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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attrs.DataType = self.to_data_type(obj.datatype) |
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# if obj.value and len(obj.value) == 1: |
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if obj.value is not None: |
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attrs.Value = ua.Variant(obj.value, getattr(ua.VariantType, obj.valuetype)) |
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if obj.rank: |
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attrs.ValueRank = obj.rank |
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if obj.accesslevel: |
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attrs.AccessLevel = obj.accesslevel |
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if obj.useraccesslevel: |
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attrs.UserAccessLevel = obj.useraccesslevel |
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if obj.minsample: |
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attrs.MinimumSamplingInterval = obj.minsample |
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if obj.dimensions: |
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attrs.ArrayDimensions = obj.dimensions |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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def add_variable_type(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.VariableTypeAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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attrs.DataType = self.to_data_type(obj.datatype) |
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if obj.value and len(obj.value) == 1: |
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attrs.Value = obj.value[0] |
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if obj.rank: |
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attrs.ValueRank = obj.rank |
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if obj.abstract: |
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attrs.IsAbstract = obj.abstract |
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if obj.dimensions: |
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attrs.ArrayDimensions = obj.dimensions |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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def add_method(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.MethodAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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if obj.accesslevel: |
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attrs.AccessLevel = obj.accesslevel |
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if obj.useraccesslevel: |
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attrs.UserAccessLevel = obj.useraccesslevel |
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if obj.minsample: |
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attrs.MinimumSamplingInterval = obj.minsample |
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if obj.dimensions: |
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attrs.ArrayDimensions = obj.dimensions |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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153
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1 |
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def add_reference(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.ReferenceTypeAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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if obj. inversename: |
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attrs.InverseName = ua.LocalizedText(obj.inversename) |
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if obj.abstract: |
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attrs.IsAbstract = obj.abstract |
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if obj.symmetric: |
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attrs.Symmetric = obj.symmetric |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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169
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1 |
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def add_datatype(self, obj): |
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node = self._get_node(obj) |
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attrs = ua.DataTypeAttributes() |
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if obj.desc: |
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attrs.Description = ua.LocalizedText(obj.desc) |
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attrs.DisplayName = ua.LocalizedText(obj.displayname) |
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if obj.abstract: |
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attrs.IsAbstract = obj.abstract |
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node.NodeAttributes = attrs |
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self.server.add_nodes([node]) |
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self._add_refs(obj) |
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181
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1 |
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def _add_refs(self, obj): |
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182
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1 |
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if not obj.refs: |
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return |
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184
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refs = [] |
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185
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for data in obj.refs: |
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186
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ref = ua.AddReferencesItem() |
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ref.IsForward = True |
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188
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ref.ReferenceTypeId = self.to_ref_type(data.reftype) |
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189
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ref.SourceNodeId = ua.NodeId.from_string(obj.nodeid) |
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190
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ref.TargetNodeClass = ua.NodeClass.DataType |
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ref.TargetNodeId = ua.NodeId.from_string(data.target) |
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refs.append(ref) |
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self.server.add_references(refs) |
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FreeOpcUa /
python-opcua
