def check(expected, string, delimiters=None):
def expand(ref, index):
return "<%d: %s>" % (index, ref)
if delimiters != None:
actual = utils.expand_delimited_tokens(string, expand,
delimiters)
else:
actual = utils.expand_delimited_tokens(string, expand)
self.assertEquals(expected, actual)
def eval(self, context, **kwargs):
# Using the configuration to pass the eval globals dictionary to here,
# since there isn't any easy way to do this more elegantly
globals_and_locals = {}
if hasattr(context, '_eval_expression_globals_dict'):
globals_and_locals = context._eval_expression_globals_dict
str_to_eval = self._str_to_eval
def expand_feature_ref(ref, index):
var_name = "__fea_%05d" % index
globals_and_locals[
var_name] = context.configuration.get_default_view(
).get_feature(ref)
return var_name
def expand_value_ref(ref, index):
var_name = "__feaval_%05d" % index
globals_and_locals[
var_name] = context.configuration.get_default_view(
).get_feature(ref).get_value()
return var_name
str_to_eval = utils.expand_delimited_tokens(str_to_eval,
expand_feature_ref,
delimiters=('@{', '}'))
str_to_eval = utils.expand_delimited_tokens(str_to_eval,
expand_value_ref,
delimiters=('${', '}'))
# Strip leading and trailing whitespace to avoid indentation problems
str_to_eval = str_to_eval.strip()
ret = None
try:
ret = eval(str_to_eval, globals_and_locals)
return ret
except SyntaxError, e:
logging.getLogger('cone.ruleml').warning(
"Invalid syntax in eval: %s" % (str_to_eval))
self.ast.add_error(
self.expression, {
'error_string': 'Invalid syntax in eval',
'str_to_eval': str_to_eval,
'rule': self.ast.expression
})
def _solve_condition(self, condition_str, context):
"""
Internal function to handle condition
"""
if condition_str != "":
#Expanding ConfML information
modstr = utils.expand_delimited_tokens(
condition_str,
lambda ref, index: repr(context.configuration.get_default_view(
).get_feature(ref).get_value()))
return eval(modstr)
else:
#Empty condition is true always.
return True
def get_input(self):
"""
Get the confml ref value from configuration if the outputpath is actually a ref
"""
if self._path and self.configuration is not None:
dview = self.configuration.get_default_view()
def expand(ref, index):
value = dview.get_feature(ref).get_original_value()
if value is None: return ''
else: return value
return utils.expand_delimited_tokens(self._path, expand)
else:
return self._path
def _replace_eval_blocks(cls, code):
return utils.expand_delimited_tokens(
string = code,
expander_func = lambda ref, index: '__eval__ %r' % ref,
delimiters =('{%', '%}'))