def has_property(elem_to_parse, xpath):
"""
Parse xpath for any attribute reference "path/@attr" and check for root and presence of attribute.
:return: True if xpath is present in the element along with any attribute referenced, otherwise False
"""
xroot, attr = get_xpath_tuple(xpath)
if not xroot:
return False
elif not attr:
return bool(get_elements_text(elem_to_parse, xroot))
else:
return bool(get_element_attributes(elem_to_parse, xroot).get(attr))
def has_property(elem_to_parse, xpath):
"""
Parse xpath for any attribute reference "path/@attr" and check for root and presence of attribute.
:return: True if xpath is present in the element along with any attribute referenced, otherwise False
"""
xroot, attr = get_xpath_tuple(xpath)
if not xroot and not attr:
return False
elif not attr:
return bool(get_elements_text(elem_to_parse, xroot))
else:
return bool(get_element_attributes(elem_to_parse, xroot).get(attr))
def _parse_keywords(self, prop):
""" Parse type-specific keywords from the metadata: Theme or Place """
keywords = []
if prop in KEYWORD_PROPS:
xpath_root = self._data_map['_keywords_root']
xpath_map = self._data_structures[prop]
xtype = xpath_map['keyword_type']
xpath = xpath_map['keyword']
ktype = KEYWORD_TYPES[prop]
for element in get_elements(self._xml_tree, xpath_root):
if get_element_text(element, xtype).lower() == ktype.lower():
keywords.extend(get_elements_text(element, xpath))
return keywords
def _parse_keywords(self, prop):
""" Parse type-specific keywords from the metadata: Theme or Place """
keywords = []
if prop in [KEYWORDS_PLACE, KEYWORDS_THEME]:
xpath_root = self._data_map['_keywords_root']
xpath_map = self._data_structures[prop]
xtype = xpath_map['keyword_type']
xpath = xpath_map['keyword']
if prop == KEYWORDS_PLACE:
ktype = KEYWORD_TYPE_PLACE
elif prop == KEYWORDS_THEME:
ktype = KEYWORD_TYPE_THEME
for element in get_elements(self._xml_tree, xpath_root):
if get_element_text(element, xtype).lower() == ktype.lower():
keywords.extend(get_elements_text(element, xpath))
return keywords
def parse_property(tree_to_parse, xpath_root, xpath_map, prop):
"""
Defines the default parsing behavior for metadata values.
:param tree_to_parse: the XML tree compatible with element_utils to be parsed
:param xpath_root: used to determine the relative XPATH location within the parent element
:param xpath_map: a dict of XPATHs that may contain alternate locations for a property
:param prop: the property to parse: corresponds to a key in xpath_map
"""
xpath = xpath_map[prop]
if isinstance(xpath, ParserProperty):
if xpath.xpath is None:
return xpath.get_prop(prop)
xpath = xpath.xpath
if xpath_root:
xpath = get_xpath_branch(xpath_root, xpath)
parsed = None
if not has_property(tree_to_parse, xpath):
# Element has no text: try next alternate location
alternate = '_' + prop
if alternate in xpath_map:
return parse_property(tree_to_parse, xpath_root, xpath_map,
alternate)
elif '@' not in xpath:
parsed = get_elements_text(tree_to_parse, xpath)
else:
xroot, xattr = get_xpath_tuple(xpath)
parsed = get_element_attributes(tree_to_parse, xroot).get(xattr)
return get_default_for(prop, parsed)
def parse_property(tree_to_parse, xpath_root, xpath_map, prop):
"""
Defines the default parsing behavior for metadata values.
:param tree_to_parse: the XML tree compatible with element_utils to be parsed
:param xpath_root: used to determine the relative XPATH location within the parent element
:param xpath_map: a dict of XPATHs that may contain alternate locations for a property
:param prop: the property to parse: corresponds to a key in xpath_map
"""
xpath = xpath_map[prop]
if isinstance(xpath, ParserProperty):
if xpath.xpath is None:
return xpath.get_prop(prop)
xpath = xpath.xpath
if xpath_root:
xpath = get_xpath_branch(xpath_root, xpath)
parsed = None
if not has_property(tree_to_parse, xpath):
# Element has no text: try next alternate location
alternate = '_' + prop
if alternate in xpath_map:
return parse_property(tree_to_parse, xpath_root, xpath_map, alternate)
elif '@' not in xpath:
parsed = get_elements_text(tree_to_parse, xpath)
else:
xroot, xattr = get_xpath_tuple(xpath)
parsed = get_element_attributes(tree_to_parse, xroot).get(xattr)
return get_default_for(prop, parsed)
