beremiz: comparison xmlclass/xmlclass.py

equal deleted inserted replaced

-:c44692b53736
+:4d7cee25a474
 infos["elmt_type"] = FindTypeInfos(factory, infos["elmt_type"])
 if infos["minOccurs"] == 1:
 element_name = factory.etreeNamespaceFormat % infos["name"]
 if infos["elmt_type"]["type"] == SIMPLETYPE:
 def initial_value():
-value = etree.Element(element_name)
+value = factory.Parser.makeelement(element_name)
 value.text = (infos["elmt_type"]["generate"](infos["elmt_type"]["initial"]()))
+value._init_()
 return value
 else:
 def initial_value():
 value = infos["elmt_type"]["initial"]()
 if infos["type"] != ANY:
 self.NSMAP = {}
 self.Namespaces = {}
 self.SchemaNamespace = None
 self.TargetNamespace = None
 self.etreeNamespaceFormat = "%s"
+self.Parser = None
 self.CurrentCompilations = []
 # Dictionaries for stocking Classes and Types generated
 self.ComputeAfter = []
 setattr(class_definition, "__getattr__", generateGetattrMethod(self, class_definition, classinfos))
 setattr(class_definition, "__setattr__", generateSetattrMethod(self, class_definition, classinfos))
 class_infos = {
 "type": COMPILEDCOMPLEXTYPE,
 "name": classname,
-"initial": generateClassCreateFunction(class_definition),
+"initial": generateClassCreateFunction(self, class_definition),
 }
 if self.FileName is not None:
 self.ComputedClasses[self.FileName][classname] = class_definition
 else:
 self.ComputedClasses[classname] = class_definition
 self.ComputedClassesInfos[classname] = class_infos
 return re.compile(base_structure_pattern + "".join(elements) + "$")
 else:
 raise ValueError("XSD structure not yet supported!")
-def generateClassCreateFunction(class_definition):
+def generateClassCreateFunction(factory, class_definition):
 """
 Method that generate the method for creating a class instance
 """
 def classCreatefunction():
-return class_definition()
+return factory.Parser.CreateElementFromClass(class_definition)
 return classCreatefunction
 def generateGetattrMethod(factory, class_definition, classinfos):
 attributes = dict([(attr["name"], attr) for attr in classinfos["attributes"] if attr["use"] != "prohibited"])
 if not isinstance(value, ListType):
 value = [value]
 for element in reversed(value):
 if element_infos["elmt_type"]["type"] == SIMPLETYPE:
-tmp_element = etree.Element(factory.etreeNamespaceFormat % name)
+tmp_element = factory.Parser.makeelement(factory.etreeNamespaceFormat % name)
 tmp_element.text = element_infos["elmt_type"]["generate"](element)
 element = tmp_element
 self.insert(insertion_point, element)
 elif "base" in classinfos:
 class XMLElementClassLookUp(etree.PythonElementClassLookup):
 def __init__(self, classes, *args, **kwargs):
 etree.PythonElementClassLookup.__init__(self, *args, **kwargs)
 self.LookUpClasses = classes
+self.ElementTag = None
+self.ElementClass = None
 def GetElementClass(self, element_tag, parent_tag=None, default=DefaultElementClass):
 element_class = self.LookUpClasses.get(element_tag, (default, None))
 if not isinstance(element_class, DictType):
 if isinstance(element_class[0], (StringType, UnicodeType)):
 element_with_parent_class = element_class.get(parent_tag, default)
 if isinstance(element_with_parent_class, (StringType, UnicodeType)):
 return self.GetElementClass(element_with_parent_class, default=default)
 return element_with_parent_class
+def SetLookupResult(self, element, element_class):
+"""
+Set lookup result for the next 'lookup' callback made by lxml backend.
+Lookup result is used only if element matches with tag's name submited to 'lookup'.
+This is done, because there is no way to submit extra search parameters for
+etree.PythonElementClassLookup.lookup() from etree.XMLParser.makeelement()
+It's valid only for a signle 'lookup' call.
+:param element:
+element's tag name
+:param element_class:
+element class that should be returned on
+match in the next 'lookup' call.
+:return:
+Nothing
+"""
+self.ElementTag = element
+self.ElementClass = element_class
+def ResetLookupResult(self):
+"""Reset lookup result, so it don't influence next lookups"""
+self.ElementTag = None
+self.ElementClass = None
+def GetLookupResult(self, element):
+"""Returns previously set SetLookupResult() lookup result"""
+element_class = None
+if self.ElementTag is not None and self.ElementTag == element.tag:
+element_class = self.ElementClass
+self.ResetLookupResult()
+return element_class
 def lookup(self, document, element):
+"""
+Lookup for element class for given element tag.
+If return None from this method, the fallback is called.
+:param document:
+opaque document instance that contains the Element
+:param element:
+lightweight Element proxy implementation that is only valid during the lookup.
+Do not try to keep a reference to it.
+Once the lookup is done, the proxy will be invalid.
+:return:
+Returns element class corresponding to given element.
+"""
+element_class = self.GetLookupResult(element)
+if element_class is not None:
+return element_class
 parent = element.getparent()
 element_class = self.GetElementClass(
 element.tag, parent.tag if parent is not None else None)
 if isinstance(element_class, ListType):
 children = "".join([
 return element_class[0]
 return element_class
 class XMLClassParser(etree.XMLParser):
+def __init__(self, *args, **kwargs):
-def __init__(self, namespaces, default_namespace_format, base_class, xsd_schema, *args, **kwargs):
 etree.XMLParser.__init__(self, *args, **kwargs)
+def initMembers(self, namespaces, default_namespace_format, base_class, xsd_schema):
 self.DefaultNamespaceFormat = default_namespace_format
 self.NSMAP = namespaces
 targetNamespace = etree.QName(default_namespace_format % "d").namespace
 if targetNamespace is not None:
 self.RootNSMAP = {
 self.DefaultNamespaceFormat % parent_tag
 if parent_tag is not None else parent_tag,
 None)
 def CreateElement(self, element_tag, parent_tag=None, class_idx=None):
+"""
+Create XML element based on elements and parent's tag names.
+:param element_tag:
+element's tag name
+:param parent_tag:
+optional parent's tag name. Default value is None.
+:param class_idx:
+optional index of class in list of founded classes
+with same element and parent. Default value is None.
+:return:
+created XML element
+(subclass of lxml.etree._Element created by class factory)
+"""
 element_class = self.GetElementClass(element_tag, parent_tag)
 if isinstance(element_class, ListType):
 if class_idx is not None and class_idx < len(element_class):
-new_element = element_class[class_idx]()
+element_class = element_class[class_idx]
 else:
 raise ValueError("No corresponding class found!")
-else:
+return self.CreateElementFromClass(element_class, element_tag)
-new_element = element_class()
+def CreateElementFromClass(self, element_class, element_tag=None):
+"""
+Create XML element instance of submitted element's class.
+Submitted class should be subclass of lxml.etree._Element.
+element_class shouldn't be used to create XML element
+directly using element_class(), because lxml backend
+should be aware what class handles what xml element,
+otherwise default lxml.etree._Element will be used.
+:param element_class:
+element class
+:param element_tag:
+optional element's tag name.
+If omitted it's calculated from element_class instance.
+:return:
+created XML element
+(subclass of lxml.etree._Element created by class factory)
+"""
+if element_tag is None:
+element_tag = element_class().tag
+etag = self.DefaultNamespaceFormat % element_tag
+self.ClassLookup.SetLookupResult(etag, element_class)
+new_element = self.makeelement(etag)
+self.ClassLookup.ResetLookupResult()
 DefaultElementClass.__setattr__(new_element, "tag", self.DefaultNamespaceFormat % element_tag)
 new_element._init_()
 return new_element
 def GenerateParser(factory, xsdstring):
 """
 This function generate a xml parser from a class factory
 """
+parser = XMLClassParser(strip_cdata=False, remove_blank_text=True)
+factory.Parser = parser
 ComputedClasses = factory.CreateClasses()
 if factory.FileName is not None:
 ComputedClasses = ComputedClasses[factory.FileName]
 BaseClass = [(name, XSDclass) for name, XSDclass in ComputedClasses.items() if XSDclass.IsBaseClass]
-parser = XMLClassParser(
+parser.initMembers(
 factory.NSMAP,
 factory.etreeNamespaceFormat,
 BaseClass[0] if len(BaseClass) == 1 else None,
-etree.XMLSchema(etree.fromstring(xsdstring)),
+etree.XMLSchema(etree.fromstring(xsdstring)))
-strip_cdata=False, remove_blank_text=True)
 class_lookup = XMLElementClassLookUp(factory.ComputedClassesLookUp)
 parser.set_element_class_lookup(class_lookup)
 return parser

changeset 2308	4d7cee25a474
parent 2297	96ca6b056c55
child 2343	33071a451021