XMLParser._parse_list() - Code Metrics - Inspection of "also export namespace of referenced nodes" - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#327)

by Olivier

created 2016-10-15 19:34 UTC

XMLParser._parse_list() A

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Complexity

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Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	12

Importance

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Metric	Value
cc	3
dl	0
loc	10
ccs	0
cts	0
cp	0
crap	12
rs	9.4285
c	0
b	0
f	0

"""
parse xml file from opcua-spec
"""
import logging
import re
import sys

import xml.etree.ElementTree as ET


def _to_bool(val):
    if val in ("True", "true", "on", "On", "1"):
        return True
    else:
        return False


def ua_type_to_python(val, uatype):
    if uatype.startswith("Int") or uatype.startswith("UInt"):
        return int(val)
    elif uatype.lower().startswith("bool"):
        return _to_bool(val)
    elif uatype in ("String"):
        return val
    elif uatype in ("Bytes", "Bytes", "ByteString", "ByteArray"):
        if sys.version_info.major > 2:
            return bytes(val, 'utf8')
        else:
            return val
    else:
        raise Exception("uatype nopt handled", uatype, " for val ", val)



class NodeData(object):

    def __init__(self):
        self.nodetype = None
        self.nodeid = None
        self.browsename = None
        self.displayname = None
        self.symname = None  # FIXME: this param is never used, why?
        self.parent = None
        self.parentlink = None
        self.desc = ""
        self.typedef = None
        self.refs = []
        self.nodeclass = None
        self.eventnotifier = 0

        # variable
        self.datatype = None
        self.rank = -1  # check default value
        self.value = None
        self.valuetype = None
        self.dimensions = None
        self.accesslevel = None
        self.useraccesslevel = None
        self.minsample = None

        # referencetype
        self.inversename = ""
        self.abstract = False
        self.symmetric = False

        # datatype
        self.definition = []

    def __str__(self):
        return "NodeData(nodeid:{})".format(self.nodeid)
    __repr__ = __str__


class RefStruct(object):

    def __init__(self):
        self.reftype = None
        self.forward = True
        self.target = None


class ExtObj(object):

    def __init__(self):
        self.typeid = None
        self.objname = None
        self.bodytype = None
        self.body = {}


class XMLParser(object):

    def __init__(self, xmlpath):
        self.logger = logging.getLogger(__name__)
        self._retag = re.compile(r"(\{.*\})(.*)")
        self.path = xmlpath

        self.tree = ET.parse(xmlpath)
        self.root = self.tree.getroot()
        self.it = None

    def get_used_namespaces(self):
        """
        Return the used namespace uris in this import file
        """
        namespaces_uris = []
        for child in self.root:
            name = self._retag.match(child.tag).groups()[1]
            if name == 'NamespaceUris':
                namespaces_uris = [ns_element.text for ns_element in child]
                break
        return namespaces_uris

    def get_aliases(self):
        """
        Return the used node aliases in this import file
        """
        aliases = {}
        for child in self.root:
            name = self._retag.match(child.tag).groups()[1]
            if name == 'Aliases':
                for el in child:
                    aliases[el.attrib["Alias"]] = el.text
                break
        return aliases

    def get_node_datas(self):
        nodes = []
        for child in self.root:
            name = self._retag.match(child.tag).groups()[1]
            if name not in ["Aliases", "NamespaceUris"]:
                node = self._parse_node(name, child)
                nodes.append(node)
        
        return nodes

    def __next__(self):
        while True:
            if sys.version_info[0] < 3:
                child = self.it.next()
            else:
                child = self.it.__next__()
            return child

    def next(self):  # support for python2
        return self.__next__()

    def _parse_node(self, name, child):
        """
        Parse a XML node and create a NodeData object.
        """
        obj = NodeData()
        obj.nodetype = name
        for key, val in child.attrib.items():
            self._set_attr(key, val, obj)
        self.logger.info("\n     Parsing node: %s %s", obj.nodeid, obj.browsename)
        obj.displayname = obj.browsename  # give a default value to display name
        for el in child:
            self._parse_tag(el, obj)
        return obj

    def _set_attr(self, key, val, obj):
        if key == "NodeId":
            obj.nodeid = val
        elif key == "BrowseName":
            obj.browsename = val
        elif key == "SymbolicName":
            obj.symname = val
        elif key == "ParentNodeId":
            obj.parent = val
        elif key == "DataType":
            obj.datatype = val
        elif key == "IsAbstract":
            obj.abstract = _to_bool(val)
        elif key == "Executable":
            obj.executable = _to_bool(val)
        elif key == "EventNotifier":
            obj.eventnotifier = int(val)
        elif key == "ValueRank":
            obj.rank = int(val)
        elif key == "ArrayDimensions":
            obj.dimensions = [int(i) for i in val.split(",")]
        elif key == "MinimumSamplingInterval":
            obj.minsample = int(val)
        elif key == "AccessLevel":
            obj.accesslevel = int(val)
        elif key == "UserAccessLevel":
            obj.useraccesslevel = int(val)
        elif key == "Symmetric":
            obj.symmetric = _to_bool(val)
        else:
            self.logger.info("Attribute not implemented: %s:%s", key, val)

    def _parse_tag(self, el, obj):
        tag = self._retag.match(el.tag).groups()[1]

        if tag == "DisplayName":
            obj.displayname = el.text
        elif tag == "Description":
            obj.desc = el.text
        elif tag == "References":
            self._parse_refs(el, obj)
        elif tag == "Value":
            self._parse_value(el, obj)
        elif tag == "InverseName":
            obj.inversename = el.text
        elif tag == "Definition":
            for field in el:
                obj.definition.append(field)
        else:
            self.logger.info("Not implemented tag: %s", el)

    def _parse_value(self, el, obj):
        self.logger.info("Parsing value")
        for val in el:
            self.logger.info("tag %s", val.tag)
            ntag = self._retag.match(val.tag).groups()[1]
            obj.valuetype = ntag
            if ntag in ("Int8", "UInt8", "Int16", "UInt16", "Int32", "UInt32", "Int64", "UInt64"):
                obj.value = int(val.text)
            elif ntag in ("Float", "Double"):
                obj.value = float(val.text)
            elif ntag in ("Boolean"):
                obj.value = _to_bool(val.text)
            elif ntag in ("ByteString", "String"):
                mytext = val.text
                if mytext is None:  # support importing null strings
                    mytext = ""
                mytext = mytext.replace('\n', '').replace('\r', '')
                # obj.value.append('b"{}"'.format(mytext))
                obj.value = mytext
            elif ntag in ("Guid"):
                self._parse_value(val, obj)
            elif ntag == "ListOfExtensionObject":
                obj.value = self._parse_list_of_extension_object(el)
            elif ntag == "ListOfLocalizedText":
                obj.value = self._parse_list_of_localized_text(el)
            elif ntag.startswith("ListOf"):
                obj.value = self._parse_list(el[0])
            elif ntag == "ExtensionObject":
                obj.value = self._parse_extension_object(el)
            else:
                self.logger.warning("Value type not implemented: '%s'", ntag)

    def _get_text(self, el):
        txtlist = [txt.strip() for txt in el.itertext()]
        return "".join(txtlist)

    def _parse_list(self, el):
        value = []
        for val_el in el:
            ntag = self._retag.match(val_el.tag).groups()[1]
            if ntag.startswith("ListOf"):
                val = self._parse_list(val_el)
            else:
                val = ua_type_to_python(val_el.text, ntag)
            value.append(val)
        return value

    def _parse_list_of_localized_text(self, el):
        value = []
        for localized_text_list in el:
            for localized_text in localized_text_list:
                ntag = self._retag.match(localized_text.tag).groups()[1]
                for child in localized_text:
                    ntag = self._retag.match(child.tag).groups()[1]
                    if ntag == 'Text':
                        value.append(self._get_text(child))
        return value

    def _parse_list_of_extension_object(self, el):
        '''
        Parse a uax:ListOfExtensionObject Value
        Return an list of ExtObj
        '''
        value = []
        for extension_object_list in el:
            for extension_object in extension_object_list:
                ext_obj = self._parse_ext_obj(extension_object)
                value.append(ext_obj)
        return value

    def _parse_extension_object(self, el):
        for ext_obj in el:
            return self._parse_ext_obj(ext_obj)

    def _parse_ext_obj(self, el):
        ext = ExtObj()
        for extension_object_part in el:
            ntag = self._retag.match(extension_object_part.tag).groups()[1]
            if ntag == 'TypeId':
                ntag = self._retag.match(extension_object_part.find('*').tag).groups()[1]
                ext.typeid = self._get_text(extension_object_part)
            elif ntag == 'Body':
                ext.objname = self._retag.match(extension_object_part.find('*').tag).groups()[1]
                ext.body = self._parse_body(extension_object_part)
            else:
                print("Uknown ndtag", ntag)
        return ext

    def _parse_body(self, el):
        body = []
        for body_item in el:
            otag = self._retag.match(body_item.tag).groups()[1]
            childs = [i for i in body_item]
            if not childs:
                val = self._get_text(body_item)
            else:
                val = self._parse_body(body_item)
            if val:
                body.append((otag, val))
        return body

    def _parse_refs(self, el, obj):
        for ref in el:
            if ref.attrib["ReferenceType"] == "HasTypeDefinition":
                obj.typedef = ref.text
            elif "IsForward" in ref.attrib and ref.attrib["IsForward"] in ("false", "False"):
                # if obj.parent:
                    # sys.stderr.write("Parent is already set with: "+ obj.parent + " " + ref.text + "\n")
                obj.parent = ref.text
                obj.parentlink = ref.attrib["ReferenceType"]
            else:
                struct = RefStruct()
                if "IsForward" in ref.attrib:
                    struct.forward = ref.attrib["IsForward"]
                struct.target = ref.text
                struct.reftype = ref.attrib["ReferenceType"]
                obj.refs.append(struct)


1		"""
2		parse xml file from opcua-spec
3		"""
4	1	import logging
5	1	import re
6	1	import sys
7
8	1	import xml.etree.ElementTree as ET
9
10
11	1	def _to_bool(val):
12		if val in ("True", "true", "on", "On", "1"):
13	1	return True
14	1	else:
15	1	return False
16	1
17	1
18	1	def ua_type_to_python(val, uatype):
19	1	if uatype.startswith("Int") or uatype.startswith("UInt"):
20	1	return int(val)
21	1	elif uatype.lower().startswith("bool"):
22	1	return _to_bool(val)
23	1	elif uatype in ("String"):
24	1	return val
25	1	elif uatype in ("Bytes", "Bytes", "ByteString", "ByteArray"):
26		if sys.version_info.major > 2:
27		return bytes(val, 'utf8')
28	1	else:
29	1	return val
30	1	else:
31	1	raise Exception("uatype nopt handled", uatype, " for val ", val)
32	1
33	1
34	1
35	1	class NodeData(object):
36
37		def __init__(self):
38	1	self.nodetype = None
39	1	self.nodeid = None
40	1	self.browsename = None
41		self.displayname = None
42		self.symname = None # FIXME: this param is never used, why?
43	1	self.parent = None
44		self.parentlink = None
45		self.desc = ""
46	1	self.typedef = None
47		self.refs = []
48	1	self.nodeclass = None
49		self.eventnotifier = 0
50
51		# variable
52		self.datatype = None
53		self.rank = -1 # check default value
54	1	self.value = None
55		self.valuetype = None
56	1	self.dimensions = None
57	1	self.accesslevel = None
58	1	self.useraccesslevel = None
59	1	self.minsample = None
60	1
61		# referencetype
62	1	self.inversename = ""
63	1	self.abstract = False
64	1	self.symmetric = False
65
66	1	# datatype
67	1	self.definition = []
68	1
69		def __str__(self):
70	1	return "NodeData(nodeid:{})".format(self.nodeid)
71	1	__repr__ = __str__
72	1
73
74		class RefStruct(object):
75	1
76	1	def __init__(self):
77	1	self.reftype = None
78		self.forward = True
79		self.target = None
80
81	1
82	1	class ExtObj(object):
83
84	1	def __init__(self):
85		self.typeid = None
86		self.objname = None
87	1	self.bodytype = None
88	1	self.body = {}
89	1
90	1
91	1	class XMLParser(object):
92	1
93	1	def __init__(self, xmlpath):
94	1	self.logger = logging.getLogger(__name__)
95	1	self._retag = re.compile(r"(\{.\})(.)")
96		self.path = xmlpath
97	1
98	1	self.tree = ET.parse(xmlpath)
99	1	self.root = self.tree.getroot()
100	1	self.it = None
101	1
102	1	def get_used_namespaces(self):
103		"""
104	1	Return the used namespace uris in this import file
105		"""
106	1	namespaces_uris = []
107	1	for child in self.root:
108		name = self._retag.match(child.tag).groups()[1]
109		if name == 'NamespaceUris':
110		namespaces_uris = [ns_element.text for ns_element in child]
111		break
112		return namespaces_uris
113
114		def get_aliases(self):
115		"""
116		Return the used node aliases in this import file
117		"""
118		aliases = {}
119		for child in self.root:
120		name = self._retag.match(child.tag).groups()[1]
121		if name == 'Aliases':
122		for el in child:
123		aliases[el.attrib["Alias"]] = el.text
124		break
125		return aliases
126
127		def get_node_datas(self):
128	1	nodes = []
129	1	for child in self.root:
130		name = self._retag.match(child.tag).groups()[1]
131	1	if name not in ["Aliases", "NamespaceUris"]:
132		node = self._parse_node(name, child)
133	1	nodes.append(node)
134	1
135	1	return nodes
136	1
137	1	def __next__(self):
138	1	while True:
139		if sys.version_info[0] < 3:
140		child = self.it.next()
141		else:
142		child = self.it.__next__()
143		return child
144
145		def next(self): # support for python2
146		return self.__next__()
147	1
148	1	def _parse_node(self, name, child):
149	1	"""
150	1	Parse a XML node and create a NodeData object.
151	1	"""
152	1	obj = NodeData()
153	1	obj.nodetype = name
154		for key, val in child.attrib.items():
155	1	self._set_attr(key, val, obj)
156		self.logger.info("\n Parsing node: %s %s", obj.nodeid, obj.browsename)
157		obj.displayname = obj.browsename # give a default value to display name
158		for el in child:
159		self._parse_tag(el, obj)
160	1	return obj
161	1
162	1	def _set_attr(self, key, val, obj):
163		if key == "NodeId":
164	1	obj.nodeid = val
165		elif key == "BrowseName":
166	1	obj.browsename = val
167		elif key == "SymbolicName":
168		obj.symname = val
169		elif key == "ParentNodeId":
170		obj.parent = val
171		elif key == "DataType":
172		obj.datatype = val
173		elif key == "IsAbstract":
174	1	obj.abstract = _to_bool(val)
175	1	elif key == "Executable":
176	1	obj.executable = _to_bool(val)
177	1	elif key == "EventNotifier":
178	1	obj.eventnotifier = int(val)
179		elif key == "ValueRank":
180		obj.rank = int(val)
181	1	elif key == "ArrayDimensions":
182	1	obj.dimensions = [int(i) for i in val.split(",")]
183		elif key == "MinimumSamplingInterval":
184		obj.minsample = int(val)
185		elif key == "AccessLevel":
186		obj.accesslevel = int(val)
187		elif key == "UserAccessLevel":
188		obj.useraccesslevel = int(val)
189		elif key == "Symmetric":
190		obj.symmetric = _to_bool(val)
191		else:
192		self.logger.info("Attribute not implemented: %s:%s", key, val)
193
194		def _parse_tag(self, el, obj):
195		tag = self._retag.match(el.tag).groups()[1]
196
197		if tag == "DisplayName":
198		obj.displayname = el.text
199		elif tag == "Description":
200		obj.desc = el.text
201		elif tag == "References":
202		self._parse_refs(el, obj)
203		elif tag == "Value":
204		self._parse_value(el, obj)
205		elif tag == "InverseName":
206		obj.inversename = el.text
207		elif tag == "Definition":
208		for field in el:
209		obj.definition.append(field)
210		else:
211		self.logger.info("Not implemented tag: %s", el)
212
213		def _parse_value(self, el, obj):
214		self.logger.info("Parsing value")
215		for val in el:
216		self.logger.info("tag %s", val.tag)
217		ntag = self._retag.match(val.tag).groups()[1]
218		obj.valuetype = ntag
219		if ntag in ("Int8", "UInt8", "Int16", "UInt16", "Int32", "UInt32", "Int64", "UInt64"):
220		obj.value = int(val.text)
221		elif ntag in ("Float", "Double"):
222		obj.value = float(val.text)
223		elif ntag in ("Boolean"):
224		obj.value = _to_bool(val.text)
225		elif ntag in ("ByteString", "String"):
226		mytext = val.text
227		if mytext is None: # support importing null strings
228		mytext = ""
229		mytext = mytext.replace('\n', '').replace('\r', '')
230		# obj.value.append('b"{}"'.format(mytext))
231		obj.value = mytext
232		elif ntag in ("Guid"):
233		self._parse_value(val, obj)
234		elif ntag == "ListOfExtensionObject":
235		obj.value = self._parse_list_of_extension_object(el)
236		elif ntag == "ListOfLocalizedText":
237		obj.value = self._parse_list_of_localized_text(el)
238		elif ntag.startswith("ListOf"):
239		obj.value = self._parse_list(el[0])
240		elif ntag == "ExtensionObject":
241		obj.value = self._parse_extension_object(el)
242		else:
243		self.logger.warning("Value type not implemented: '%s'", ntag)
244
245		def _get_text(self, el):
246		txtlist = [txt.strip() for txt in el.itertext()]
247		return "".join(txtlist)
248
249		def _parse_list(self, el):
250		value = []
251		for val_el in el:
252		ntag = self._retag.match(val_el.tag).groups()[1]
253		if ntag.startswith("ListOf"):
254		val = self._parse_list(val_el)
255		else:
256		val = ua_type_to_python(val_el.text, ntag)
257		value.append(val)
258		return value
259
260		def _parse_list_of_localized_text(self, el):
261		value = []
262		for localized_text_list in el:
263		for localized_text in localized_text_list:
264		ntag = self._retag.match(localized_text.tag).groups()[1]
265		for child in localized_text:
266		ntag = self._retag.match(child.tag).groups()[1]
267		if ntag == 'Text':
268		value.append(self._get_text(child))
269		return value
270
271		def _parse_list_of_extension_object(self, el):
272		'''
273		Parse a uax:ListOfExtensionObject Value
274		Return an list of ExtObj
275		'''
276		value = []
277		for extension_object_list in el:
278		for extension_object in extension_object_list:
279		ext_obj = self._parse_ext_obj(extension_object)
280		value.append(ext_obj)
281		return value
282
283		def _parse_extension_object(self, el):
284		for ext_obj in el:
285		return self._parse_ext_obj(ext_obj)
286
287		def _parse_ext_obj(self, el):
288		ext = ExtObj()
289		for extension_object_part in el:
290		ntag = self._retag.match(extension_object_part.tag).groups()[1]
291		if ntag == 'TypeId':
292		ntag = self._retag.match(extension_object_part.find('*').tag).groups()[1]
293		ext.typeid = self._get_text(extension_object_part)
294		elif ntag == 'Body':
295		ext.objname = self._retag.match(extension_object_part.find('*').tag).groups()[1]
296		ext.body = self._parse_body(extension_object_part)
297		else:
298		print("Uknown ndtag", ntag)
299		return ext
300
301		def _parse_body(self, el):
302		body = []
303		for body_item in el:
304		otag = self._retag.match(body_item.tag).groups()[1]
305		childs = [i for i in body_item]
306		if not childs:
307		val = self._get_text(body_item)
308		else:
309		val = self._parse_body(body_item)
310		if val:
311		body.append((otag, val))
312		return body
313
314		def _parse_refs(self, el, obj):
315		for ref in el:
316		if ref.attrib["ReferenceType"] == "HasTypeDefinition":
317		obj.typedef = ref.text
318		elif "IsForward" in ref.attrib and ref.attrib["IsForward"] in ("false", "False"):
319		# if obj.parent:
320		# sys.stderr.write("Parent is already set with: "+ obj.parent + " " + ref.text + "\n")
321		obj.parent = ref.text
322		obj.parentlink = ref.attrib["ReferenceType"]
323		else:
324		struct = RefStruct()
325		if "IsForward" in ref.attrib:
326		struct.forward = ref.attrib["IsForward"]
327		struct.target = ref.text
328		struct.reftype = ref.attrib["ReferenceType"]
329		obj.refs.append(struct)
330

FreeOpcUa / python-opcua

Pull Request — master (#327)

XMLParser._parse_list() A

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