class XsdFieldSelector(XsdSelector):
"""Class for defining an XPath field selector for an XSD identity constraint."""
_ADMITTED_TAGS = {XSD_FIELD}
pattern = translate_pattern(
r"(\.//)?((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)/)*((((child::)?"
r"((\i\c*:)?(\i\c*|\*)))|\.)|((attribute::|@)((\i\c*:)?(\i\c*|\*))))"
r"(\|(\.//)?((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)/)*"
r"((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)|"
r"((attribute::|@)((\i\c*:)?(\i\c*|\*)))))*",
back_references=False,
lazy_quantifiers=False,
anchors=False)
def _parse_value(self, elem):
try:
python_pattern = translate_pattern(pattern=elem.attrib['value'],
xsd_version=self.xsd_version,
back_references=False,
lazy_quantifiers=False,
anchors=False)
return re.compile(python_pattern)
except KeyError:
self.parse_error("missing 'value' attribute", elem)
return re.compile(r'^.*$')
except (RegexError, re.error, XMLSchemaDecodeError) as err:
self.parse_error(err, elem)
return re.compile(r'^.*$')
class XsdSelector(XsdComponent):
"""Class for defining an XPath selector for an XSD identity constraint."""
_ADMITTED_TAGS = {XSD_SELECTOR}
xpath_default_namespace = ''
pattern = translate_pattern(
r"(\.//)?(((child::)?((\i\c*:)?(\i\c*|\*)))|\.)(/(((child::)?"
r"((\i\c*:)?(\i\c*|\*)))|\.))*(\|(\.//)?(((child::)?((\i\c*:)?"
r"(\i\c*|\*)))|\.)(/(((child::)?((\i\c*:)?(\i\c*|\*)))|\.))*)*",
back_references=False,
lazy_quantifiers=False,
anchors=False)
token = None
parser = None
def __init__(self, elem, schema, parent):
super(XsdSelector, self).__init__(elem, schema, parent)
def _parse(self):
super(XsdSelector, self)._parse()
try:
self.path = self.elem.attrib['xpath']
except KeyError:
self.parse_error("'xpath' attribute required")
self.path = '*'
else:
try:
match = self.pattern.match(self.path.replace(' ', ''))
except AttributeError:
# Compile regex pattern
self.__class__.pattern = re.compile(self.pattern)
match = self.pattern.match(self.path.replace(' ', ''))
if not match:
msg = "invalid XPath expression for an {}"
self.parse_error(msg.format(self.__class__.__name__))
# XSD 1.1 xpathDefaultNamespace attribute
if self.schema.XSD_VERSION > '1.0':
if 'xpathDefaultNamespace' in self.elem.attrib:
self.xpath_default_namespace = self._parse_xpath_default_namespace(
self.elem)
else:
self.xpath_default_namespace = self.schema.xpath_default_namespace
self.parser = IdentityXPathParser(
namespaces=self.namespaces,
strict=False,
compatibility_mode=True,
default_namespace=self.xpath_default_namespace,
)
try:
self.token = self.parser.parse(self.path)
except ElementPathError as err:
self.token = self.parser.parse('*')
self.parse_error(err)
def __repr__(self):
return '%s(path=%r)' % (self.__class__.__name__, self.path)
@property
def built(self):
return self.token is not None
@property
def target_namespace(self):
# TODO: implement a property in elementpath for getting XPath token's namespace
if self.token is None:
pass # xpathDefaultNamespace="##targetNamespace"
elif self.token.symbol == ':':
return self.token[1].namespace or self.xpath_default_namespace
elif self.token.symbol == '@' and self.token[0].symbol == ':':
return self.token[0][1].namespace or self.xpath_default_namespace
return self.schema.target_namespace
class XsdSelector(XsdComponent):
"""Class for defining an XPath selector for an XSD identity constraint."""
_ADMITTED_TAGS = {XSD_SELECTOR}
xpath_default_namespace = ''
pattern = translate_pattern(
r"(\.//)?(((child::)?((\i\c*:)?(\i\c*|\*)))|\.)(/(((child::)?"
r"((\i\c*:)?(\i\c*|\*)))|\.))*(\|(\.//)?(((child::)?((\i\c*:)?"
r"(\i\c*|\*)))|\.)(/(((child::)?((\i\c*:)?(\i\c*|\*)))|\.))*)*",
back_references=False,
lazy_quantifiers=False,
anchors=False
)
token = None
parser = None
def __init__(self, elem, schema, parent):
super(XsdSelector, self).__init__(elem, schema, parent)
def _parse(self):
super(XsdSelector, self)._parse()
try:
self.path = self.elem.attrib['xpath']
except KeyError:
self.parse_error("'xpath' attribute required:", self.elem)
self.path = '*'
else:
try:
if not self.pattern.match(self.path.replace(' ', '')):
self.parse_error("invalid XPath expression for an {}".format(type(self)))
except AttributeError:
# Compile regex pattern
self.__class__.pattern = re.compile(self.pattern)
if not self.pattern.match(self.path.replace(' ', '')):
self.parse_error("invalid XPath expression for an {}".format(type(self)))
# XSD 1.1 xpathDefaultNamespace attribute
if self.schema.XSD_VERSION > '1.0':
if 'xpathDefaultNamespace' in self.elem.attrib:
self.xpath_default_namespace = self._parse_xpath_default_namespace(self.elem)
else:
self.xpath_default_namespace = self.schema.xpath_default_namespace
self.parser = IdentityXPathParser(
namespaces=self.namespaces,
strict=False,
compatibility_mode=True,
default_namespace=self.xpath_default_namespace,
)
try:
self.token = self.parser.parse(self.path)
except ElementPathError as err:
self.parse_error(err)
self.token = self.parser.parse('*')
def __repr__(self):
return '%s(path=%r)' % (self.__class__.__name__, self.path)
@property
def built(self):
return self.token is not None
@property
def target_namespace(self):
if ':' in self.path:
match = QNAME_PATTERN.findall(self.path)
if match is not None:
prefix = match[0][0]
if prefix:
return self.namespaces[prefix]
elif self.xpath_default_namespace:
return self.xpath_default_namespace
return self.schema.target_namespace
