def _xpath(xml, path=None, func=None, return_list=False,
register_namespace=None):
"""
Return the content from the passed xml xpath, or return the result
of a passed function (receives xpathContext as its only arg)
"""
def _getter(doc, ctx, path):
ignore = doc
if func:
return func(ctx)
if not path:
raise ValueError("'path' or 'func' is required.")
ret = ctx.xpathEval(path)
if type(ret) is list:
if len(ret) >= 1:
if return_list:
return ret
else:
return ret[0].content
else:
ret = None
return ret
return util.xml_parse_wrapper(xml, _getter, path,
register_namespace=register_namespace)
def import_file(input_file):
"""
Import a configuration file. Raises if the file couldn't be
opened, or parsing otherwise failed.
"""
infile = open(input_file, "r")
xml = infile.read()
infile.close()
logging.debug("Importing OVF XML:\n%s", xml)
return util.xml_parse_wrapper(xml, ovf_parser._import_file,
register_namespace=register_namespace)
def _redefine(self, xml_func, *args):
"""
Helper function for altering a redefining VM xml
@param xml_func: Function to alter the running XML. Takes the
original XML as its first argument.
@param args: Extra arguments to pass to xml_func
"""
origxml = self._xml_to_redefine()
# Sanitize origxml to be similar to what we will get back
origxml = util.xml_parse_wrapper(origxml, lambda d, c: d.serialize())
newxml = xml_func(origxml, *args)
self._redefine_xml(newxml)
