def DAM_class_level(self, class_entity: und.Ent):
"""
DAM - Class Level Direct Access Metric
:param class_entity: The class entity.
:return: Ratio of the number of private and protected attributes to the total number of attributes in a class.
"""
if "Interface" in class_entity.kindname():
return 2.0
private_variables = len(
class_entity.ents("Define", "Java Variable Private Member"))
protected_variables = len(
class_entity.ents("Define", "Java Variable Protected Member"))
default_variables = len(
class_entity.ents("Define", "Java Variable Default Member"))
public_variables = len(
class_entity.ents("Define", "Java Variable Public Member"))
try:
enum_ = private_variables + protected_variables
denum_ = private_variables + protected_variables + default_variables + public_variables
ratio = enum_ / denum_
except ZeroDivisionError:
# logger.error('ZeroDivisionError in computing QMOOD DAM metric.')
ratio = 2.0
return 1. + ratio
def MFA_class_level(self, class_entity: und.Ent):
"""
MFA - Class Level Measure of Functional Abstraction
:param class_entity: The class entity
:return: Ratio of the number of inherited methods per the total number of methods within a class.
"""
metrics = class_entity.metric(
['CountDeclMethod', 'CountDeclMethodAll'])
local_methods = metrics.get('CountDeclMethod')
all_methods = metrics.get('CountDeclMethodAll')
# print(class_entity.longname(), metrics)
if "Interface" in class_entity.kindname():
return 2.
else:
implemented_interfaces = class_entity.ents('Java Implement Couple',
'~Unknown')
if len(implemented_interfaces) == 0:
if all_methods == 0:
mfa = 0
else:
mfa = round((all_methods - local_methods) / all_methods, 5)
else:
implemented_methods = 0
for interface_entity in implemented_interfaces:
implemented_methods += interface_entity.metric(
['CountDeclMethodAll']).get('CountDeclMethodAll', 0)
if all_methods == 0:
mfa = 0
else:
mfa = round(
(all_methods - implemented_methods) / all_methods, 5)
# print(class_entity.longname(), mfa)
return 1. + mfa if mfa >= 0 else 1
